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Device and method for power compensation in vehicle by means of capacitor with high capacitance Invention is related to power supply units of vehicles. The device and method are suggested for compensation of electric load power in a vehicle by means of a capacitor with high capacitance. The capacitor with high capacitance discharges current rapidly in order to compensate power when voltage at the generator and accumulator output drops temporarily during motion of the vehicle, and the capacitor is charged by permanent power pulse in order to prevent instability of the accumulator voltage in result of the generator overload taking place when the capacitor is charged. Charge of the capacitor is stopped temporarily and it discharges current to compensate power of the electrical load if voltage drops at the accumulator battery terminals in result of electrical load at the charged capacitor thus leading to compensation of power supply instability, e.g. voltage drop, in real time mode. |
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Method to control autonomous system of spacecraft power supply Invention is related to electric engineering and namely to power supply systems (PSS) of spacecraft using solar batteries as the primary energy sources and accumulator batteries as energy accumulators. The invention suggests a method for control of autonomous system of spacecraft power supply that contains a solar battery and n of accumulator battery, a voltage stabiliser coupled between the solar battery and load and n of charge and discharge devices; the method lies in control of the voltage stabiliser and charge and discharge devices depending on input and output voltage of the system, control of charge and discharge degree of the accumulator batteries, prohibition of operation for the respective charge device when it reaches the charge limit of the accumulator battery, enablement of operation when a certain discharge degree is reached by this accumulator battery, prohibition of operation for the respective discharge device when it reaches the discharge limit of the accumulator battery, enablement of operation when a certain charge degree is reached by this accumulator battery, at that in case when solar batteries loose their orientation to the Sun or in case of emergency discharge of accumulator batteries operation of all discharge devices is banned (locked), and after recovery of the solar batteries orientation to the Sun and charge of the accumulator batteries up to the preset level operation of all discharge devices is unlocked. |
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Method for determination of impregnation coefficient for electrical machines coils Invention is related to the field of electric engineering, and namely to non-destructive quality control procedures for electrical products, in particular, to impregnation of windings of electrical machines. According to the suggested method for determination of impregnation coefficient for electrical machine windings impregnated by cured polymer composition capacitance values Ccbi and Ccui in regard to the ground are measured for each electrical machine winding in the batch before and upon impregnation by the polymer composition and drying. Then, upon impregnation and drying of windings temperature of each winding T1ui is measured and through the wire of each tested winding stabilised direct current I0 is passed and its values is selected depending on section area S of the winding wire strand within the range of maximum current density permitted for the material of the winding wire from jmin up to jmax within the range of values jminS ≤I0≤jmaxS. At that the above selected current I0 is passed through the winding during a certain period of time t0 and voltage drop is measured at the winding U1i at the moment of stabilised current delivery to it and voltage drop at the winding U2i at the above period of time t0. Upon the above operations according to measurement results the impregnation coefficient Kic is determined for each tested winding in the near-body cavities and impregnation coefficient Ktt of turn-to-turn cavities in the windings as per the following formulas: К i c = 1 ln ε i s × ln С c u i ( С e q − С c b i ) С c b i ( С e q − С c u i ) , ( 4 ) (4), К t t = 1 m 0 t t с с { I 0 × t о [ U 1 i ( U 1 i + U 2 i ) α 2 ( U 2 i − U 1 i ) [ 1 + α ( Т 1 − 20 ] ] − [ 1 + α ( Т 1 − 20 ) ] B 2 U 1 i + B 1 } , ( 5 ) (5), where С e q = р S a ε 0 ε э ε f i ( d e ε f i + d f i ε e ) is equivalent capacity of in-series capacitance of enamel and frame insulation of the winding; p is a number of slots in the magnet core to which the tested part of the winding is placed; Sa is an area of the slot surface; ε0=8.854187·10-12 is the electrical constant; εe is dielectric capacitivity of enamel film at the winding wire; εfi is dielectric capacitivity of frame insulation; dei is thickness of enamel insulation of the wire; dfi is thickness of frame insulation at the wire; cc is specific heat capacity of the dried impregnation composition; m 0 t t = d c S c l w ( 1 − р 4 К f ) × р 2 − р S a 2 ε 0 ( С e q − С d c С d c С e q ) is a limit mass of dry impregnation composition which can be placed in turn-to-turn cavities of the winding at 100% of their filling; dc is density of dried impregnation composition; Scs is cross-sectional area of the slot; lw is length of the winding turn; Kf is the slot filling coefficient; α is temperature coefficient of the winding wire resistance; B1 = Ceehc + Cfiech is equivalent heat capacity of enamel С e e h c = с e π ( D e 2 − D w 2 ) 4 1 w ρ e and frame insulation Cei = Cfi × P × dfi × L × p × cfi; ce is specific heat capacity of enamel; De is the diameter of enamelled wire of the winding; Dw is the diameter of the winding wire strand; ltw is rated length of the wire in the tested winding part; ρe is enamel density; cfi is specific heat capacity of the frame insulation; P is the slot perimeter; dfi is thickness of the frame insulation; L is the slot length; ρfi is density of the frame insulation; В 2 = с w × ρ 2 0 × I 0 2 ρ w l w 2 is the constant rate; ctw is specific heat capacity of the material used for the winding wire strand; ρ20 is specific resistivity of the material used for the winding wire at 20°C. |
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Invention is related to electric engineering, and namely to spiral tension clamps intended for fixation of wires and cables of overhead transmission lines. The spiral tension clamp is made as spirals wound into a strand and consisting of at least two branched wound onto the wire or cable and forming in the middle part a U-shaped loop with an eye inserted into it and fixed through connecting elements to the line support equipped with a protector made as coiled wires or ribbon coils and mounted at the U-shaped loop side at a section of the wire or cable free from wound strands. |
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Filtering and compensating device for transmission of high-voltage direct-current energy Invention relates to electrical engineering. In the device adjustment of reactive power is carried out by switching of two or more branches, each of them is equipped with a switch for connection to the supply mains and includes capacitor banks, resistors and chokes performing functions of filtration and compensation. The device contains also one or more active elements. The capacitor banks of the device are connected to the ground through a common active element by the respective quantity of medium-voltage switches or through separate active elements and they perform the function of compensation only. The filtration functions are performed by one active element only; to this end in addition to a common set of functional units the active element balancing system is equipped with three programmable specific functional units: damping unit D, balancing unit B, unit S of selective harmonic suppression which generate driving voltages, and sum of the latter ones forms the main variable for control of the converter. |
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High-voltage three-phase alternating current generating system Invention in the field of electrical engineering. The system contains a synchronous generator with excitation from permanent magnets and three galvanically isolated three-phase windings at the stator, a static converter of electric energy based on direct frequency converter with three-phase output and natural commutation (a cycloconverter), which each phase is assembled as per the scheme of three-phase bridging reverse rectifier (BRR) with a capacitor of a low-frequency filter coupled in parallel to its output terminals and powered by one of the three-phase systems of the synchronous generator windings, one of the BRR outputs is coupled to the respective phase of a three-phase load. There is an additional phase of the direct frequency converter with three-phase output and natural commutation, which is assembled as per the scheme of three-phase bridging reverse rectifier with a capacitor of a low-frequency filter and powered from a three-phase transformer, which primary windings are coupled to any three-phase system of the synchronous generator windings, the second outputs of the three BRRs are coupled to one output of the additional phase of the direct frequency converter while the second output of the additional phase of the direct frequency converter is coupled to the zero wire of loads in the generating system. |
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Device for electric energy transmission in rocket and space complexes (versions) Invention is related to device for electric energy transmission. The result is obtained by conversion of electric energy from the energy source to high voltage of high frequency and transmission of electric energy through a single wire in resonance mode to consumers where a down converter with several output voltages is installed. The technical result is also reached by the fact that the device contains a ground power source, a power transmission line and the onboard cable network, the ground power source includes a frequency converter, a stepping-up resonance circuit, a single-wire power transmission line and a reducing transformer, the resonance circuit midpoint is connected to the feedback unit for automatic adjustment of output voltage and frequency in the power transmission line, while the reducing transformer has several output windings for connection to loads of different voltage, at that one of the windings is also connected to the feedback unit of the frequency converter for fine adjustment of output voltage in the loads. |
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Invention is related to the field of engineering and may be used in uninterrupted power supply (UPS) systems and inverters. The method and device solving the problem of mismatch between UPS systems of non-sinusoidal oscillations and loads with active power factor compensation (PDC) includes the following stages when non-sinusoidal oscillations to be delivered as a load (e.g., voltage fluctuations) are generated with relative pulse duration of pulse-width modulation (PWM); discretisation of these non-sinusoidal oscillations to accumulate output signal readings and regulation of relative pulse duration to control non-sinusoidal oscillations depending on output signal readings in order to deliver the desired signal characteristic (e.g., mean-square signal level) as a load. In the embodiments the relative output pulse duration is regulated in different ways in case of growing and lowering power consumption by the load respectively. |
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In suggested magnetoelectric generator containing stator with toroidal magnetic circuit with radial teeth grouped in groups of three teeth with stator winding mounted on them and the disc rotor mounted on the shaft with permanent magnets having axially oriented magnetisation and alternating polarity, according to the invention group of the rotor permanent magnets corresponds to each group of teeth with stator windings, at that the distance lm between the outermost edges of the magnets in each group in an arc concentrical in regard to the rotor axis and passing in the middle of magnets corresponds to the distance lo in the same arc between the extreme points of the stator windings in each group. |
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Method of computer-aided power system operation and computer-aided power system Invention relates to electric power supply system (10). Said system comprises data processing device (11) to output the programme. Said programme outputs functions for control over power supply system and is connected with multiple automation devices (13) and, at least, one remote memory unit (15a, 15b, 15c). This memory unit stores at least one programme component required for execution of at least one programme. Note here that at least one local memory device (16) stores the copy of at least one programme component. After programme initiation local device (11) checks if said copy complies with programme component stored at memory unit (15a, 15b, 15c). If YES, local device (11) executes the programme using at least one copy of programme component. If NO, said local device (11) calls at least one programme component for at least one remote memory device (15a, 15b, 15c) to execute the programme with its help. |
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Invention is related to an electric motor mounted on the transport vehicle and to a gear motor. The motor with short-circuiting equipotential segments mounted at its collector (10); brushes (21) consisting of a low-speed brush (21a), a high-speed brush (21b) and a common brush (21c). Circumferential width (W2) of the high-speed brush is less than circumferential width (W1) of the low-speed brush. The high- and low-speed brushes are made so that their simultaneous sliding contact with equipotential segments (15) is excluded. Besides, armature cores (8) are made so that a variety of teeth (12) are placed centrally and symmetrically around the rotary shaft (3) at equal space in direction along the circumference, and teeth and slots (13) are formed so that their position is alternated in 90 degrees in direction along the circumference. |
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Electric installation with electric battery capacity Invention refers to vehicle battery chargers. The presented electric installation with an electric battery capacity represents a power transmission facility comprising a voltage supply converter, an AC voltage network connected to an AC voltage terminal of the converter, and a DC voltage node connected to a DC voltage terminal of the converter. The converter comprises in-series connected switching elements each of which has at least one energy storage capacitor. The electric batteries can be parallel connected to the above capacitor, and a charging status can be adjusted by controlling the switching element of the voltage converter through a control circuit. |
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Solar module with concentrator and method of its production Invention relates to the field of solar engineering, in particular, to solar modules with concentrators for the generation of electric and heat energy. In a solar module with a concentrator comprising transparent focusing prisms with triangular cross section, with beam entry angle β0 and total internal reflection angle α = arcsin 1 n , where n stands for the refraction coefficient of the prism having an entry face and a radiation re-reflection face forming a common dihedral angle φ, a face of concentrated radiation output with a radiation detector and a reflection device in the form of a mirror reflector which together with the re-reflection face forms an acute dihedral angle ψ being placed unidirectionally with the acute dihedral angle φ of the focusing prism. The concentrator is made from two symmetrical transparent focusing prisms having a common line of contact of the entry and output faces which is oriented in the North-South direction. The reflection device consists of a set of mirror reflectors with the length L0 with equal acute angles ψ installed at some distance from one another, with a device for turning in respect to the re-reflection face, the entry face surface is fitted by additional mirror reflectors inclined to the entry face surface at the angle of 90°-δ and made in the form of louver with a device for turning in respect to the entry face surface, angle of the additional mirror reflectors' inclination to the entry face surface is directed differently from the acute angle φ of the focusing prism, axes of the turning device for the additional mirror reflector on the entry face surface and axes of the turning device for the mirror reflector on the re-reflection device with the re-reflection face are in one plane perpendicular to the entry surface, and the angles φ, ψ, δ, β0 and α are interconnected by certain ratios. Method of manufacturing the solar module with the concentrator involves manufacturing of the focusing prism from optically transparent material, installation of the radiation detector, radiation re-reflection device with mirror reflectors and additional mirror reflectors on the working surface with turning devices. According to the invention cavity walls of two focusing prisms with an acute dihedral angle at vertex 2-15° are produced from hardened sheet glass or other transparent sheet material and are pressurised, the focusing prisms are installed so that the faces of entry and output of each prism at vertex have a common contact line oriented in the North-South direction, and afterwards the obtained cavity is filled by optically transparent medium, the radiation detector is mounted hermetically and the additional mirror reflectors with the turning devices are assembled on the working surface of the focusing prism as well as the turning device for the radiation re-reflection device. |
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Automotive transport power system with principle of periodic charging, discharging Invention relates to automotive transport power system with principle of periodic charging and discharging. Automotive transport power system contains automobile electric road, stations for electromobile charging and discharging, vehicle. Charging and discharging stations consist of control and monitoring unit, electric transformer, underground electric power cable, positive charge feed bus, negative charge feed bus, emergency generator. Charging stations are placed at uphills. Discharging stations are placed at downhills. Vehicle is active element. Vehicle contains automotive wheel base, electric motors, batteries, power-generating mechanism, recovery system, system for temporary storage and proper distribution of power. Electric current supply rod with rising-lowering mechanism is located on the bottom of vehicle. Charging and discharging is performed in motion. |
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Charging system for electrical vehicles System contains at least one charging port with interface for energy exchange with at least one electrical vehicle, at least one power converter intended to convert power supplied from the power source such as the supply mains to the format suitable for the vehicle charging, at that the power converted is in remote position from the charging port, for example, in a separate room and/or building. |
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Axial inductor electric machine with electromagnet excitation Invention is related to the field of electric engineering, and namely to electric machines and is referred to design of axial inductor electric machines. The suggested axial inductor electric machine with electromagnet excitation contains the stator housing, stator magnet packs, excitation windings, windings of alternating electromotive force, the rotor and rotor magnet packs. According to the invention a cylindrical turbine rotated in a flow of gas or another medium as the rotor shaft is equipped with three geared magnet packs place axially to the stator windings at the outer diameter of the turbine shaft and are shifted per ⅓ of the geared section and without open magnetic-air gap with the stator windings they form the three-phase system of a reversible electric machine. In motor operation one type of control voltage is supplied to the windings of alternating electromotive force in the form of sequential rectangular electrical pulses which duration defines frequency of the rotor shaft rotation. |
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Device to remove ice and snow from overhead wires Proposed device comprises power electronic switch (1), integral local circuit reflectometer (2), current HF pulse generator (3), identical galvanically-isolated generators of high-power currents pulses (4.1-4.n), quantity n of the latter corresponding to the quantity of controlled overhead lines connected with power electronic switch. Besides, integral local circuit comprises controller (5) connected with reflectometer (2), computer-aided dispatcher workstation with computer (6) and light panel (7). |
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Method for matching symmetrical four-wire power transmission line to electrical load Invention is related to electric engineering and may be used for transmission of electric power to consumers through a non-uniform four-wire power transmission line. Matching of the non-uniform four-wire power transmission line to electrical load is attained in result of fulfilment of certain conditions including comparison of actual (measured at the site in real time mode) and reference (determined by means of special software) resistances of the generalised loads and voltages at the end of non-symmetrical section included in the non-uniform four-wire power transmission line or currents coming to the generalised loads. Input data on voltages, currents and frequency at the non-symmetrical uniform sections included into the line composition can be obtained through the interface unit, or sensors made in the form of voltage and current transformers or in the form of voltage dividers and alternating current shunts, spectrum analysers and frequency meters. In result of the input data processing control signals are generated for adjustment bodies, which may be represented by constant-voltage regulators of power transformers, chokes, three-phase devices and single-phase devices that generate current and voltage such as capacitor banks, three-wire (without the fourth wire from the neutral line of the power source or load) generalised loads consisting of step-down transformers, which primary and secondary windings are wye/wye-connected with neutral power lead or delta/wye-connected with neutral power lead. |
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Power supply source for electric installations Device comprises three-phase rectifier with a filter loaded to voltage inverter with load, for example, with parallel LC-circuit, the inverter control unit coupled to the reference voltage setting unit and a voltage sensor, a current sensor, a temperature sensor and a pulse-width modulator; there is an additional matching transformer, an additional source of constant voltage and a bridge saturable core reactor, at that secondary winding of the matching transformer is connected to the load while primary winding is coupled to the above inverter through the in-series first diagonal of bridge saturable core reactor and current sensor, the second diagonal of the saturable core reactor is shunted by the linear choke and diode and connected through a key to the source of constant voltage, at that the key is installed in parallel to diode and is coupled through the input to the control circuit based on pulse-width modulator. |
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Submersible pumpset control station Invention is related to oil-production equipment and namely to control stations for electrocentrifugal pump engines, and it may be used for formation fluid production by means of pumps. The pumpset control station includes a cabinet consisting of the first and second spaces and two additional spaces. Placement of fans used for circulation of the cooling air in the second additional space allowed combining a hydraulic part of the inverter and rectifier cooling systems and the second space in the cabinet with reactive elements of the submersible pumpset control station. Besides, the suggested engineering solution allows use of the second additional space for installation of elements of the control station which require additional cooling. Temperature sensors of the reactive elements cooling systems are installed at the surface of these reactive elements. |
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Twelve-phase transformer-coupled phase converter Invention is related to converter equipment and may be used for manufacturing of rectifiers for direct and alternating-current electric controlled drives in order to improve their operational speed. Twelve-phase transformer-coupled phase converter consists of a three-phase converter having three wye- (or delta-) connected coils of the primary winding coupled to the three-phase network with zero wire, six interconnected coils of the secondary windings with taps from turns. Each coil of the secondary winding of the transformer is a side of the hexagon circuit that converts a symmetric three-phase system of voltage into six-phase system of voltage. Each tap of the secondary winding coil turn is one of outputs of the symmetric twelve-phase voltage system of the converter. Voltage of the twelve-phase voltage system depends on a voltage value of the six-phase system and is related to it as per the following ratio: U12=U6Cos30°/Cos15°=0.897U6. |
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Invention suggests a digital electric drive containing a setting device which output is connected to a position regulator with its output connected to a variable-speed control unit, a pulse-width modulator, a servomotor, at that the servomotor is made as a disc toothless thyratron motor divided into three segments and each segment is coupled to an individual power amplifier and a phase current sensor for each segment, which are coupled to a torque valuator, output of the latter is connected to a torque controller, which second input is connected to the output of the variable-speed control unit and output is connected to the pulse-width modulator, the output of the modulator is coupled to three power amplifiers of the motor segments, the electric drive is equipped additionally with a position sensor, which input is connected to the motor and output to the position sensor controller, the output of the controller is connected to the second input of the position regulator and to the second input of the variable-speed control unit through a velocity valuator. |
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Device exchanges electric energy between power systems (1) and (2). Voltage inverters at each side are formed by diode bridges (7) and (8) and bridges (11, 12) of back-to-back closing gates. The controlled bridges (11) or (12) can be switched off for the periods of unidirectional energy transmission to perform routine maintenance or to reduce losses of electric energy. |
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Voltage stabilisation system at extended power transmission line Voltage stabilisation system contains a transformer substation and an aerial transmission line with power supply branch lines, three independent voltage adders at each of the phase lines installed at the end of the last line, at that the voltage adder is made as a bridge circuit, two parallel interconnected branch lines, which consist of in-series accumulating LC delay line and bidirectional transistor-based commutator, in the bridge circuit diagonal there is an installed bidirectional triode thyristor, accumulating LC delay lines of the bridge circuit branches are connected to phase and zero wires respectively. |
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Invention is related to a capacitive power supply unit, moreover to an electronic device equipped with the capacitive power supply unit. To this end at the first facility the capacitive power supply unit contains an input part (10) having input contacts (Ln, Nt) to connect an alternating-current source and a capacitive coupling; a rectifying part (20) connected through the capacitive coupling to the input contacts (Ln, Nt) and an output part (30) connected to the rectifying part, there's an auxiliary device (R1) limiting start-up current where output contacts (V+, V-) are connected to the respective contacts of a device (D5) limiting output voltage, and in-series capacitive impedance (Zdc) conducting direct current has a resistive component with a resistive value equal to at least 0.2 of the first circuit resistive value. At the second facility the electronic device contains a power input (101), (102) for connection to the supply mains; a capacitive power supply unit (110) coupled to the power input; the first functional unit (140) receiving power supply from the capacitive power supply unit. |
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Protector for hydraulic protection of submerged oil-filled electromotor Protector contains a body 1, a shaft 4 with the lower and upper end seals 6, a support 5 of the shaft 4, nipples, a footstep unit, the upper and lower heads 2 with flanges 3 for connection to the pump and electromotor respectively. The protector contains an impeller 7 of a centrifugal pump mounted on the shaft 4 between the end seal 6 and the flange for connection to the pump. The inner diameter D of the impeller 7 disc 9 faced towards the end seal 6 is bigger than the diameter d of the shaft 4. The outer diameter D1 of the disc 9 is less than the outer diameter D2 of the opposite disc 8 of the impeller 7. Centring of the impeller 7 in regard to the shaft 4 is made along the inner diameter d of the impeller 7. |
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Application: in the field of electric engineering. A device contains at least one input/output module (24). The module (24) consists of a body (34) with a mounted circuit board with at least one signal processing unit, at least one bus connector (36, 38) which passes through the first side of the body and a set of terminal blocks (40) to connect field wires to the field equipment, at that the terminal blocks are placed at the second side of the body. At least one signal processing unit includes at least one unit for conversion of input and output signals to/from the field equipment and interfacing through the bus as per the bus communications protocol. |
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Power distribution system and method Invention is related to a power distribution system and method. The system (10) contains a lot of generating systems (12, 14, 16, 18), at that each generating system (12, 14, 16, 18) contains an alternating current generator (20, 22, 24, 26) coupled directly to the rectifier (28, 30, 32, 34). The alternating current generator (20, 22, 24, 26) with slewing capacity is coupled to the energy source (13, 15, 17, 19). During operation of the energy source (13, 15, 17, 19) the alternating current generator (20, 22, 24, 26) generates an output signal (38, 40, 42, 44) desynchronised in regard to the variety of other generating systems (12, 14, 16, 18) and having a variable velocity. The rectifier (28, 30, 32, 34) coupled directly to the generator (20, 22, 24, 26) is adapted to convert an output signal (38, 40, 42, 44) of the alternating current generator (20, 22, 24, 26) into direct current output signal (46, 48, 50, 52). The direct current distribution bus (36) is connected to direct-current outputs (46, 48, 50, 52) of each rectifier (28, 30, 32, 34). The system (10) contains also a variety of inverters (56, 58, 60, 62) adapted to receive power from the bus (36). The output signal of each inverter (56, 58, 60, 62) is adapted to activate an alternating current motor (64, 66, 68, 70). |
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Multilevel converter as reactive power compensator with active power balancing Application: in the field of electric engineering. A multilevel converter (7) has several converting lines (8-10) which are wye- or delta-connected to phases (2-4) of the three-phase network. On the basis of phase voltage (U2-U4) values and phase current (IL2-IL4) values an active component (w) and at least two asymmetric components (w', b') are determined. The active component (w) and at least two asymmetric components (w', b') are filtered by means of the respective filter response. The phase voltage (U2-U4) values are multiplied by the component (w) and by at least two components (w', b'), whereupon they are multiplied by the respective weight coefficient (ga-gc) and the result is applied to the phase current (IL2-IL4) values. Current (I0) is determined in the neutral wire on the basis of components (w', b') and values (U2-U4) and applied to the phase current (IL2-IL4) values. Based on the phase current (IL2-IL4) values modified in this way the control state (A) is defined for the converting lines (8-10). The converting lines (8-10) are thus controlled respectively. |
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Reactive power control systems, devices and methods Invention is related to the field of electric engineering and may be used for reactive power control in power supply systems for such devices as digging machines of different type, which are used for mining operations. The approximate defined embodiments can provide an adapted system, a device, manufacture, a scheme and/or a user interface and/or a method and/or a machine-readable medium containing instructions for activities that can contain by means of the preset data device for the preset digging machine consisting of a variety of active input cascades, at that each active input cascade is coupled electrically to the AC power mains of the above digging machine, each active input cascade is adapted to supply DC power to the DC bus, the above DC bus is coupled electrically to a variety of inverters and each inverter is adapted to supply AC power to at least one operating motor, an active power control is formed by each active input cascade in an independent way. |
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Invention relates to electric engineering. An electrostatic generator contains a dielectric cylinder mounted on a shaft. A fabric (4) is fixed to the inner side of a housing (1). In the fabric (4) there are metal strips (5). Blades are fixed to the shaft (8). In the cylinder there are additional metal strips and a metal ring (12). The shaft (8) is rotated with the cylinder. The cylinder surface touches the fabric (4). The metal strips (5) collect positive charges from the cylinder. Through diodes by wires positive electric charges come to the electric power transmission line. Additional metal strips eliminate negative electric charges from the fabric (4) and feed them to the ring (12) and a current collector (13). By the wire (14) through the diode (15) negative electric charges come to the electric power transmission line. |
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Device for cables protection from snow sticking, icing and large wave actions Application in the field of electrical engineering. The device contains a shaped flexible fully open or fully closed shell with a slot inside, wherein there is a flexible strong shell-bearing plate, a cable is placed inside the shell, at that it is clamped by clamps at several points along the whole its length and these clamps are interconnected in each set by rigid and strong ties. Whereat the clamps are interconnected by rigid and strong ties similar or different in length with similar or different gaps in between. At that both clamps and shell are made of mom-conducting material. |
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Device contains a directional element consisting of matching current and voltage converters of transformer type, two frequency filters, two emergency component filters, two current and voltage signs comparator circuits, two univibrators, two inhibit circuits and a starting element consisting of a commercial frequency filter, an inhibit circuit, a voltage relay, AND element, a time element and two output relays, there are also auxiliary inhibit circuit, a commercial frequency filter, two threshold elements, two time elements and two output relays. |
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Method of linear spiral armature manufacturing Method lies in processing of rigid members made as threads (metal wires with protective coating or without it, non-metal rods, etc.). Wire with diameter from 0.1 mm up to 24 mm are unwounded from coils, cut into sections, at that a spherical shape is provided to ends of the cut sections, the cut sections are collected into bundles and fastened into a strand with length determination of the strand middle part, the strand is twisted in turns with their number from 1 up to 150 turns; the middle part of the strand can remain unwind for certain cases of application for the manufactured linear spiral armature; then end parts of the strand are shaped as spiral with a regular pitch and diameter, or with an alternating pitch and diameter or with a regular pitch and alternating diameter and vice a versa. Length Lm of the strand medium part is defined from the below ratio: Lm=(0.05÷3)·(L1+L2/2), where L1 is the strand length measured from the left end of the medium part up to the left end of the strand in a ready-to-use article while L2 is the strand length measured from the right end of the medium part up to the right end of the strand in a ready-to-use article respectively. |
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Control device for flyback converter Device contains a transformer for the insulated voltage flyback converter, a diode, a secondary circuit with load and a switching element, at that one output of the switching element is connected to anode of the first diode while its cathode is connected to the summator input and to one input of the primary transformer winding, by the other input this winding is connected to the power supply bus; the second output of the switching element is coupled to the common bus at the side of the transformer primary winding; the third output of the switching element is coupled to the control device output; secondary winding though the secondary circuit is connected to the load; the summator is connected to the power supply bus by its one input and to the output of the controlled signal source by its other input, while its output is connected to the input of a measuring instrument; the measuring instrument has two input coupled to the tripping pulse generator; he tripping pulse generator is connected to the control device input. |
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Invention relates to windmill generator (1) with closed internal cooling circuit with stator (4) made of metal sheet. Said stator has the system of windings with front parts (10) composed thereby. Note here that stator (4) is surrounded in at least the sheet stack area by cooling shell (3). Note also that permanent magnets (18) of rotor (5) are arranged on shell (6) of salient-pole rotor shaped to hollow shaft. Note here that salient-pole rotor shell (6) is connected via bearing elements (28) on end sides with shaft (7) or shaft ends and locked thereat. Note here that said hollow shaft accommodates at least one pipe (29, 33) with its side surface located equidistantly from salient-pole rotor shell (6). Note also that fans (24, 25) are arranged at rotor end sides. Said pipe is fitted inside hollow shaft to make cooling channels. |
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Linear asynchronous motor contains an inductor 1 consisting of the core 2 and polyphase winding, coil 3 which form rows in longitudinal and transversal directions. The secondary element 4 contains an electroconductive part 5 placed at the ferromagnetic base 6. The electroconductive part 5 contains a middle part 7, to which side members 8 join at both sides and each side part is formed by alternating electroconductive rods 9 perpendicular to the one-piece part 7 and electroconductive rods 10 are placed one after one parallel to the one-piece part 7. |
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Method is implemented with introduction of an active mains filter 22 and two groups of the secondary windings at transformer-rectifying cascade 7 into the construction of the third relay 21. |
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Uninterrupted and secured power supply system for crucial power consumers System consists of an accumulator battery, a direct-current motor coupled to the generator shaft, a three-phase rectifier, the system has an asynchronous generator with rotor and special stator windings with load connection terminals taken from the middle of the above windings, the main and auxiliary exciting capacitors, a voltage regulator, a frequency control and regulating unit, a regulating element, an active power directional relay, a high-speed breaker, and the supply mains. |
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Contactless electrical machine In contactless electrical machine containing stator with z equally spaced teeth at which m-phase winding is placed and a rotor with 2p alternating poles, according to the invention a number of the stator teeth z and a number of the rotor poles 2p is selected so that the ratio between them meet the formula z=m(2p±1) at 2p non-multiple to m. |
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Control device for providing parallel operation of vst generator Invention is related to the control device for providing parallel operation of a VST generator. The control device for providing parallel operation of a VST generator A contains the first, second and third invertors (22a, 22b, 22c), each one is connected to three windings laid around an alternating-current generator with a motor drive, the invertors convert alternating current outputted by the windings to direct- and alternating current in order to supply converted alternating current. The device also contains the first, second and third controllers (CPU 22a2, 22b2, 22c2) to control ON/OFF switching of the switching elements in order to ensure parallel operation of the VST generator A with at least one VST generator B having the same construction as the VST generator A in order to generate three-phase alternating current. |
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Invention pertains to the field of electrical engineering and can be used in (1) a power supply source. The power-supply source circuit contains: input contacts (17, 19) intended for connection of the power-supply source circuit (1) to the direct-current energy source circuit (7), two output contacts intended for connection of the load circuit (11) the power-supply source circuit (1), a bridge circuit (3) containing at least two in-series switches (M1, M2) interconnected between two output contacts, a resonant circuit (5) connected at its one end to one or more input contacts and at its other end to the interconnecting track (15) of at least two switches (M1, M2) of the bridge circuit (3) and at least two diodes (D1, D2), at that the first diode (D1) is coupled between the first input contact intended to connect a positive contact of the direct-current energy source (7) and the first end contact of the in-series switches. The first end contact is connected to the first output contact, the second diode (D2) is coupled between the input contact intended for connection to a negative contact of the energy source circuit (7) and the second end contact of the in-series switches, at that the second end contact is connected to the second output contact. |
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Application in the field of electrical engineering. The system includes a battery power source of electric power-driven tool and an auxiliary power supply source. The battery power source has a battery and a monitoring circuit. The battery has at least one battery cell. The monitoring circuit is actuated by electric power supplied from the battery; the circuit controls state of the battery. The auxiliary power supply source outputs electric power that allows operation of the monitoring circuit. The monitoring circuit is made so that when the circuit is inoperable with electric power supplied by the battery in result of battery voltage decrease the circuit may operate with electric power supplied by the auxiliary power supply source. |
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Power supply interface for electric tool powered by plurality of battery packs, and adapter Electric tool containing tool case, electric load placed inside the above tool case; power supply interface for the above electric tool containing interface of the first battery pack adapted for removable fastening of the first battery pack and including an input terminal of the first battery positive terminal and an input terminal of the first battery negative terminal; interface of the second battery pack adapted for removable fastening of the second battery pack and including an input terminal of the second battery positive terminal and an input terminal of the second battery negative terminal. The input terminal of the first battery negative terminal is connected electrically to the input terminal of the second battery positive terminal, at that the input terminal of the first battery positive terminal is connected electrically the input terminal of the second battery negative terminal through the above electrical load. The indicators (160; 260) adapted for data display in regard to the respective states of the first battery packs are placed so that they are seen simultaneously by the electric tool user. |
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Sealed module with disconnectors for distribution device with gas insulation Invention relates to distribution devices. Distribution device module has housing (4) forming common gas chamber for storage of insulating gas for distribution device module, collecting buses conductors, three sections (110, 120 and 130) of collecting buses conductors located in common gas chamber; unit for connecting outgoing conductors with three holes for outgoing conductors, sections of conductors pass from inside of housing to one of holes for outgoing conductors; and three disconnectors (151, 161, 171) which connect one of sections (110, 120, 130) of collecting buses conductors with one of sections of outgoing conductors via separation point (152, 162, 172). Outgoing normal plane is parallel to median perpendiculars of holes for outgoing conductors. Separation points (152, 162, 172) are located in space so that separation point (152, 162) of one of the first disconnectors (151, 161) is located on the first side of outgoing normal plane, and separation point (172) of one of the second disconnectors (171) is located on the second outgoing normal plane opposite to the first side. |
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Invention relates to a square-cage rotor for an asynchronous motor. The rotor contains a laminated pack (1) with groves (3), cage rings (5) of the first material moulded at end surfaces to the laminated pack and conductors (4) of the second material with higher conductivity than the first material, at that the conductors are placed in the grooves. Surface of the conductors (4) has a coating (8) of the coating material which through the first doped layer (2) of the second material and coating material borders with the second material of the conductors (4) and through the second doped layer (9) of the first material and coating material border with the first moulded material. |
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Magnetoelectric machine with improved rotation uniformity Invention is related to the area of electric engineering and namely to electric machines with permanent-magnet excitation, and it may be used in electric machine engineering. At that the invention ensures improved rotation uniformity, enhanced energy indicators, reduction of noise and vibration level for the magnetoelectric machine. In the suggested magnetoelectric machine including armature with winding laid in z slots and non-salient pole rotor with permanent magnets the armature slots are bevelled at the angle α corresponding to an integer number of tooth harmonic periods. |
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Method for fast three-phase reclosure of transmission lines with compensation by shunt reactor Invention relates to the field of electric engineering and suggests an adaptive switching method to control overload in result of three-phase reclosure of transmission lines with compensation by shunt reactor. Since an automatic circuit breaker (ACB) cuts the line off interaction between shunt admittance of the transmission lines and inductance of the reactive power compensator makes voltage between the ACB poles taking an oscillation form (beat). An optimal section for ACB reclosure corresponds to the section where voltage beat amplitude between the ACB contacts is minimum. It also allows a bigger time span for ACB operation after detection of the optimal section for reclosure, at that there are still several period of the main frequency ahead. The algorithm of the method is included into the control logic device for a digital relay of the three-phase reclosure of transmission lines thus creating a new digital relay for adaptive three-phase reclosure of transmission lines with compensation by shunt reactor. |
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Invention relates to the field of electric engineering, in particular, to electric machines. The suggested unipolar current generator may be used as an industrial direct- or alternating-current generator and in other applications as well. The essence lies in that a grid-type disc of metal plates (disc sectors) is used as a rotor rotating in a perpendicular magnet field, the metal plates are divided by dielectric layers with slider contacts at the axis of disc rotation, and poles of the rotating permanent or alternating magnet field are used as a stator. |
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Hierarchical control system for battery of electric energy accumulators Hierarchical control system for a battery of electric energy accumulators relates to the field of electric engineering and it can be used for manufacturing of high-voltage batteries of electric energy accumulators for transportation and power-generating sectors. The essence of the invention lies in that each of the series-connected electric energy accumulators has at its lower control level an individual control unit powered from the accumulator and connected at the medium control level through an intramodular serial communication channel isolated galvanically to the respective control unit of the electric energy accumulators powered and connected at the upper control level through an intramodular serial communication channel isolated galvanically with the battery control unit powered by the battery. The accumulator control unit consist of a monitoring and control unit based on a microcontroller and a balancing unit based on transformer circuit, which is made as a device for bidirectional energy transfer from an individual battery accumulator through a current sensor to the direct-current accumulating line end-to-end for the battery, this line contains parallel capacitors of the accumulator control units, which are coupled in parallel to secondary windings of the accumulative transformer made as a transformer with flyback voltage converter stepping the voltage up to the side of the battery accumulating line, with diodes shunted by electronic keys in the primary and secondary windings of the transformer and controlled from the respective drivers by means of the microcontroller for the accumulator control unit. The accumulator control unit is connected to the temperature control unit while the battery control unit based on the high-efficient microcontroller with enhanced memory capacity is connected to the battery current sensor, a switching unit with a fuse and onboard charge device and through in-series communication channel isolated galvanically to the onboard charge device and to external systems. |
Another patent 2513417.