Bridge self-maintained voltage transducer

FIELD: electricity.

SUBSTANCE: in bridge self-maintained voltage transducer the secondary winding of a transformer is used to design a transistor saturation source. The result is obtained due to the bridge self-maintained voltage transducer with transistor saturation source which comprises the first, second, third and fourth transistors and their collectors, emitters of the first and second transistors, resistors, a transformer, a filter capacitor and the power source bus.

EFFECT: reducing power loses at transistors of the bridge self-maintained voltage transducer and increasing its reliability.

1 dwg

 

The invention relates to electrical engineering and can be used to build generators and converters voltage in the secondary power supply of electronic equipment.

The well-known bridge of disturbing voltage Converter (patent No. 2340076), which is selected as a prototype, containing the first, second, third and fourth transistors, the emitters of the first and second transistors integrated and connected to one of the power supply buses, transitions emitter-base all transistor device is activated diodes, the base of the first transistor through the operating winding of the transformer and the resistor 10 is connected to the base of the second transistor, and through a resistor 11 to the base of the fourth transistor, the primary winding of the transformer connected between the emitters of the third and fourth transistors, the collector of the first transistor is connected to the base of the third transistor, and the collector of the second transistor is connected to the base of the fourth transistor, the collectors of the third and fourth transistors connected to the corresponding bus of the power source and the circuit of the collector-base of the third and fourth transistors included resistors 12, 13.

The disadvantage of this bridge disturbing voltage Converter is a power loss in the third and fourth transistors in an open state due to high what about the residual stresses at the junctions of the emitter to the collector, that reduces the efficiency of the bridge disturbing voltage Converter and affects the mode of operation of the transistors, thereby reducing the reliability of disturbing voltage Converter.

The present invention is to reduce the power loss in the transistors of the bridge disturbing voltage Converter and increase its reliability.

This object is achieved in that in bridged autogenerator voltage Converter, containing the first, second, third and fourth transistors, the emitters of the first and second transistors integrated and connected to one of the power supply buses, transitions emitter-base all transistor device is activated diodes, the base of the first transistor through the operating winding of the transformer and the resistor 10 is connected to the base of the second transistor, and through a resistor 11 to the base of the fourth transistor, the primary winding of the transformer connected between the emitters of the third and fourth transistors, the collector of the first transistor is connected to the base of the third transistor, and the collector of the second transistor is connected to the base of the fourth transistor, the collectors of the third and fourth transistors connected to the corresponding bus power supply, the entered source saturation of the transistors, the resistors 12, 13 is included between the bases of the third and fourth transistors and one of the poles of the source of the saturation of these transistors, consisting of the secondary winding of the transformer, diode and filter capacitor, while the other polarity of the source of saturation of the transistors connected to the bus power supply connected to the collectors of the third and fourth transistors. The filter capacitor is included between the poles of the source of the saturation of the third and fourth transistors.

The essence of the invention is illustrated in the drawing, where Fig.1 shows the electric diagram of the bridge of disturbing voltage Converter with source saturation of the transistors.

Bridge disturbing the voltage Converter comprises transistors of the same conductivity 1, 2, 3, 4, transitions, emitter - base which device is activated by the diodes 5, 6, 7, 8, between the emitters of the transistors 3, 4 on the primary winding of the transformer 9, and between the bases of the transistors 1, 2 through the resistor 10 to the control winding of the transformer 9. At the base of the transistor 1 is the bias current through resistor 11. Unlocking of the transistors 3, 4 is provided by resistors 12, 13. Source saturation of transistors consisting of a secondary winding of the transformer 9, the rectifying diode 14 and the filter capacitor 15 through resistors 12, 13 are connected to the circuit of the emitter-base transistors 3, 4, which are under the influence of the voltage source in the open state of perehodjat the saturation mode, thus reducing the residual voltage at the junctions of the emitter, the collector and the power loss in the transistors.

The technical result of the present invention is to reduce the power loss in the transistors of the bridge disturbing voltage Converter and increase its reliability by introducing a source of saturation of the transistors.

This invention is intended for use in the control units, actuators, developed by JSC "ISS" as a master oscillator secondary power source.

From the known to the applicant of patent information materials are not signs of a similar set of features of the claimed object.

Bridge disturbing voltage Converter, containing the first, second, third and fourth transistors, the emitters of the first and second transistors integrated and connected to one of the power supply buses, transitions emitter-base all transistor device is activated diodes, the base of the first transistor through the operating winding of the transformer and the resistor 10 is connected to the base of the second transistor, and through a resistor 11 to the base of the fourth transistor, the primary winding of the transformer connected between the emitters of the third and fourth transistors, the collector of the first transistor is connected to the base of the third transistor, and the collector of the second is resistor connected to the base of the fourth transistor, the collectors of the third and fourth transistors connected to the corresponding bus power source, characterized in that the resistors 12, 13 connected between the bases of the third and fourth transistors and one of the poles of the source of the saturation of these transistors consisting of a secondary winding of the transformer, diode and filter capacitor, while the other polarity of the source of saturation of the transistors connected to the bus power supply connected to the collectors of the third and fourth transistors; a filter capacitor connected between the poles of the source of the saturation of the third and fourth transistors.



 

Same patents:

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering and can be used on alternating-current electrically propelled vehicles. In a method of phase control of two or more thyristor converters simultaneously operating for individual loads and fed from one AC network, pulses of different converters are supplied with an offset between each other through angle Δα that is chosen as equal to maximum Δαmax, if control pulses are in the middle part of the half-period of supply voltage, it is smoothly increased from zero to Δαmax in the range of 0 electrical degrees of supply voltage between straight lines Δα=α*Δαmax/18 and Δα=α*Δαmax/54, where α - angle of output of the first control pulse (electrical degrees), and it is smoothly decreased from Δαmax to zero at control angles approaching to 180 electrical degrees between straight lines Δα=(180-α)*Δαmax/18 and Δα=(180-α)*Δαmax/54. Angle Δαmax is chosen within 1-18 electrical degrees.

EFFECT: increasing an angle of pulse delay up to 18 electrical degrees in the middle part of the half-period of voltage and reducing maximum capacity of full load of thyristor converters.

1 dwg

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering and can be used in direct converters. In the direct converter control method power semiconductor keys of switch cabins (2) of the respective phase module (1) are controlled by control signal (S1). For each phase module (1) the control signal (S1) is generated on the basis of difference between the reference signal (Vref,UR, Vref,US, Vref,UT, Vref,VR, Vref,VS, Vref,VT, Vref,WR, Vref,WS, Vref,WT) in regards to voltage (UUR, UUS, UUT; UVR, UVS, UVT; UWR, UWS, UWT) at the phase module (1) and voltage signal (VLUR, VLUS, VLUT, VLVR, VLVS, VLVT, VLWR, VLWS, VLWT) at inductance coil (LUR, LUS, LUT, LVR, LVS, LVT, LWR, LWS, LWT), which is generated from the reference signal (Vref,UR, Vref,US, Vref.UT, Vref,VR, Vref.VS, Vref,VT, Vref,WR, Vref,WS, Vref,WT) in regards to current (iUR, iUS, iUT; iVR, iVS, iVT; iWR, iWS, iWT) through the phase module (1); it is generated from the average value (P¯U,P¯V,P¯W) or instantaneous value (PU, PV, PW) of the phase power (U, V, W) in the first current system or voltage system connected to the phase module (1), from the average value (P¯R,P¯S,P¯T) or instantaneous value (PR, PS, PT) of the phase power (R, S, T) of the second current system or voltage system connected to the phase module (1), from the sum of instantaneous values (PUVW) or average values (PUVWM) of the phases (U, V, W) power in the first current system or voltage system and from the sum of instantaneous values (PRST) or average values (PRSTM) of the phases (R, S, T) power in the second current system or voltage system. Additionally invention claims device for method implementation.

EFFECT: reduction of undesirable energy fluctuations at phase modules.

8 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: invention relates to the converters widely used, for example in solar power. Technical result is achieved due to assurance of work to three phase load and joint operation with three phase grid by means of making the multi-level step-up three-phase converter containing common DC source, for example in form of the solar panel, single-phase bridge self-contained inverter, to its output the additional three-phase converter of cell type is connected, it contains HF step-up single-phase multi-winding transformer, single-phase reversible cells connected with secondary windings of the transformer, control system, current and voltage transmitters, setup unit of output voltage with industrial frequency. The matching transformer of industrial frequency is connected. Number of levels in the output voltage sinusoid is determined by number of single-phase reversible cells in the frequency converter.

EFFECT: improvement of weight and dimension parameters and expansion of functional abilities.

2 cl, 3 dwg

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering. The arrangement of electric energy supply to a load through a filtering bus comprises at least two converters of voltage sources, each of them is connected in parallel to the filtering bus through an inductance coil and configured for joint loaded operation. Each converter is connected to a control unit (10) configured to control voltage (vf) of the filtering bus at maintenance of dynamic control of the converter current. This control unit engages generation of two perpendicular intercrossing voltage vectors (vfx, vfy) of the filtering bus out of the filtering bus voltage as well as generation of the current vector (ikx, iky) for each voltage vector of the filtering bus. Also the control unit uses multiplication of each current vector by the attenuation coefficient (Dpri) common for all current vectors. Multiplication product (13) is delivered for subtraction of this result from the respective reference vector (v*fx, v*fy) of the filtering bus voltage.

EFFECT: potential dynamic current control and current limitation.

13 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: polyphase machine (30) is controlled by means of parallel multiphase inverters (101, 102). Each inverter comprises branches (101a, 101b, 101c; 102a, 102b, 102c) in quantity equal to a phase number in the electrical machine, and the inverters are controlled by pulse-width modulation (PWM). In response to the failure detection in the inverter branch (102a) this branch is disconnected, and the respective phase is supplied through the other or any other branch of the inverter (101a). PWM control is changed in order to ensure conducting state continuously and without reswitching of power breakers in this or any other branch of the inverter (101a) when absolute value of current strength (Ia) in the tested phase is equal or exceeds the threshold making up 80-120% of n1nImax, where n is a number of inverters and Imax is maximum current strength of the phase.

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9 cl, 9 dwg

Dc/dc converter // 2531375

FIELD: electricity.

SUBSTANCE: invention is referred to power conversion equipment and is a DC/DC converter with transformer coupling between the power supply unit and load. The claimed device comprises a pulse transformer to transmit energy to the load circuit, a current switch of the transformer first winding, a current rectifier of the transformer second winding and a capacitor of the output filter coupled in parallel to direct-current load, besides each valve of the rectifier is coupled between the secondary winding output connected to it and one output of the output filter capacitor, for each valve there is an auxiliary circuit in the form of a three-terminal device, which first output is coupled to the connection point of the secondary winding output and the valve while its second and third outputs are coupled to outputs of the output filter capacitor, in the three-terminal device between its second and third outputs there is a diode circuit represented by the first and second diodes and between the first output of the three-terminal device and the midpoint of the diode circuit there is a capacitor, an auxiliary damping RC-circuit is introduced to the three-terminal device as in-series resistor and capacitor and this circuit shunts the first or second diodes in the three-terminal device.

EFFECT: increase of efficiency and reliability of the claimed device.

2 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: the device comprises a current sensor, a real differentiating section, a diode, a filter, a selection and storage section, a comparator, a trigger circuit, a forward-backward counter, a clock generator, a divider, a switch, summators and a current regulator.

EFFECT: reducing power current dispersion and arc extinction and in-process short-circuits.

1 dwg

FIELD: electricity.

SUBSTANCE: invention relates to a three-phase source of uninterrupted power supply. The offered circuit of the electric power converter with input interface which comprising multiple input lines, each of which is intended for coupling with a phase of a multiphase AC power source with a sine signal; set of DC buses including the first positive DC bus with the first rated DC voltage, second positive DC bus with the second rated DC voltage, first negative DC bus with the third rated DC voltage, and second negative DC bus with the fourth rated DC voltage; The circuit of the electric power converter comprising the first electric power converter and the second electric power converter, each is connected with AC input and at least with one of multiple DC buses.

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20 cl, 16 dwg

FIELD: electricity.

SUBSTANCE: power conversion system comprises a power converter, using multiple branches to convert inlet electric power and discharge capacities into multiple phases. Each branch comprises upper and lower arms; a controller 30 that controls the upper and lower arm of each branch, in order to control pulse current passing via the branch. The controller 30 calculates a command of duration of connection for each branch in one period of control for each phase and for the first and second branches from multiple branches, provided for one determined phase, changes the phase of the calculated command of connection duration, so that the time period, when the positive pulse current flows via the first branch, and the time period, when the negative pulse current flows through the second branch, cover each other in one control period.

EFFECT: reduced pulsations of current in a multi-phase power converter.

10 cl, 9 dwg

FIELD: electricity.

SUBSTANCE: AC voltage rectifier comprises an ohmic area, to which AC voltage is supplied, via an insulating area connected to provide a good thermal contact to a thermoelectric structure, from which DC voltage is taken. At the same time in order to achieve a technical result at a certain distance from the surface of the ohmic area there is a solar concentrator fixed on a holder, performing additional heating of the ohmic area, besides, the distance between the ohmic area and solar concentrator corresponds to the focus distance of lenses within the solar concentrator. The surface of the thermoelectric structure opposite to the one contacting with the ohmic area, is coupled with a thermal accumulator, made in the form of a reservoir with a salt solution, having low cryohydrate temperature of dissolution, periodical adding of which into the appropriate reservoir is carried out with a special batcher.

EFFECT: increased value of DC voltage, generated by a device.

1 dwg

FIELD: electricity.

SUBSTANCE: 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.

EFFECT: reduction of heat dispersion losses.

6 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: invention suggests a current control system that contains at least one longitudinal branch with longitudinal linear controller (1, 11; 12) in order to shape a signal (u, u1, u2) controlling the impact; at that the longitudinal controller (1, 11, 12) is connected to semiconductive actuating element (2, 21, 22) connected to supply voltage (Uin) and referred to earthing and to which output voltage (Uout) is applied at the output side. At that reference signal is supplied to the longitudinal controller (1, 11, 12) while current-measuring signal and regulating signal (u, u1, u2) are referred to earthing. The regulating signal (u, u1, u2) is sent to the difference shaper (5, 51, 52) which subtracts difference of supply voltage (Uin) and output voltage (Uout, U1out, U2out) from the regulating signal (u, u1, u2). At that the shaped output signal from the difference shaper (5, 51, 52) is sent to semiconductive actuating element (2, 21, 22) as a corrected regulating signal (u', u'1, u'2).

EFFECT: improving reliability and accuracy of current control system.

10 cl, 3 dwg

FIELD: electricity.

SUBSTANCE: proposed device comprises a primary converter, which is formed by a closed magnetic conductor, on which the secondary winding is placed, and a phase wire is pulled into the central hole of the closed magnetic conductor, at the same time winding clamps form output clamps of the primary converter, and output clamps of the secondary winding of the primary converter are connected to input clamps of the voltage converter-controller via a serially connected non-polar capacitor. A load is connected to output clamps of the converter-controller. Current flowing in a wire excites electromagnetic field in a magnetic conductor, intensity of which is determined by the ratio where I - the value of current force in the phase wire, lav - the medium line of the closed magnetic conductor. Intensity of the magnetic field induces voltage on clamps of the secondary winding, which is proportionate to the number of turns where U - valid value of output voltage of the primary converter in the idle mode, Iav - medium line of the closed magnetic conductor, S - cross section of the magnetic conductor, k - derivative of a linear section of the main curve of magnetisation of magnetic conductor material, Imin - minimum value of current force in the phase wire.

EFFECT: higher level of power taken from a phase wire of an industrial frequency high voltage power transmission line to a relatively higher load exceeding Ohm units, with preservation of small dimensions and weight of a device.

1 dwg

FIELD: electricity.

SUBSTANCE: system for reduction of voltage in an electric source of AC power supply for a load with the purpose to increase energy efficiency comprises a transformer and a power converter connected into a circuit between the electric source of AC supply and the load, and a shunting switch S, which provides for transformer disconnection from the circuit and which connects the electric source of supply with the load in case of continuous overload of the transformer. The system comprises a facility (14) to measure transformer temperature, a facility (17) to measure current in the circuit and a control facility (15), receiving signals from sensors (14, 17) and for control of the shunting switch S, to shunt the transformer and make it possible for it to be cooled down. A safety fuse F2 and a device (16) of thermal opening are connected into the circuit of the secondary winding of the transformer, as a safety device for interrupting of power supply into the transformer, if there is a failure in operation of the shunting switch.

EFFECT: provision of a system, by means of which the transformer may be shunted to eliminate heating, prevent damage of a transformer and reduce a potential risk of fire.

FIELD: electricity.

SUBSTANCE: DC voltage stabiliser contains a regulating transistor, an amplifying transistor, an output voltage divisor, a base voltage divisor containing a resistor and a stabilitron, a startup unit consisting of a stabilitron, a diode, a resistor and a capacitor, a resistor and a diode.

EFFECT: device reliability enhancement due to the triggering circuit simplification.

2 dwg

FIELD: electricity.

SUBSTANCE: protection transistor (15) collector stabiliser is connected to the DC amplifier (10) transistor base, the base is connected to the common terminal (1) via a series RC-circuit, the point of connection of the resistor (13) and the RC-circuit capacitor (14) is connected to the input terminal (5) via a diode (11) while the base-emitter junction of the protection transistor (15) is shunted by the second resistor (12).

EFFECT: extension of functional capabilities.

2 dwg

FIELD: electricity.

SUBSTANCE: device comprises automatic circuit breaker, voltage limiter, current sensor and unit of generation of signal of load and voltage limiter disconnection from source of supply provided that current passing along voltage limiter exceeds specified threshold value, besides, the first additional unit of generation of signal of load and voltage limiter disconnection from source of supply provided that voltage arriving from grid exceeds specified threshold value, and the second additional unit of generation of signal of load and voltage limiter disconnection from source of supply provided that energy released at voltage limiter exceeds specified threshold value, voltage sensor and OR circuit.

EFFECT: increased reliability of overvoltage protection device and increase of its durability.

3 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: in a stabilizer the collector of protective transistor is connected to the common point of connection of the capacitor and the third resistor in the startup RC-circuit, the emitter of said transistor is connected to input pin, and the base of said transistor is connected to one of outputs of the second resistor, while its other output is connected to cathode of the diode that has its anode connected to output pin.

EFFECT: possibility of stabilizer self-starting after elimination of short-circuiting on its output and expansion of device application field.

2 dwg

FIELD: electric engineering, possible use in autonomous electric supply systems of spacecrafts for supplying power to consumers from limited power supply, such as a solar battery.

SUBSTANCE: in accordance to the invention, constant voltage regulator contains input and output clamps for connecting power supply and load, metal-dielectric-semiconductor transistor, connected in parallel to output clamps, and dividing Schottky diode, installed between same name poles of input and output clamps. Second metal-dielectric-semiconductor transistor with control driver is introduced serially with dividing Schottky diode. Threshold device is introduced additionally, input of which is connected in parallel to dividing Schottky diode, and output - to controlled input of control driver.

EFFECT: increased reliability of operation of charge-discharge device due to ensured protection of power supply circuits and accumulator battery from short circuits in separate cells.

1 dwg

Voltage stabilizer // 2291475

FIELD: electrical engineering, possibly sources for secondary power supply of radio-electronic apparatuses.

SUBSTANCE: stabilizer includes regulating transistor 1 whose emitter is connected with inlet terminal and collector with outlet terminal; transistor 2 of opposite conductivity type. Collector of transistor 2 is connected with base of transistor 1, its base is connected with outlet of output voltage divider 4,5, its emitter is connected through Zener diode 3 with outlet terminal and through electric current setting resistors 12 - with common bus. According to invention starting capacitor 7 is connected between base of transistor 2 of amplifier and base of transistor 1 whose base-emitter junction is by-passed by diode 11 in reverse direction.

EFFECT: improved operational reliability of stabilizer.

2 dwg

FIELD: power units designed to ensure spark safety of loads.

SUBSTANCE: proposed device 200 designed to supply with power spark-proof load provided with feedback circuit of integrated current supply and current limiting component and also to minimize voltage that should be limited in compliance with sparking safety standards has power supply PS and output terminals T1-T2 for connecting device to spark-proof load. Voltage limiting unit Z1 inserted between power supply PS and output terminals T1-T2 is used to limit voltage across load leads. Current limiting unit 202 has barrier resistors designed for current-to-voltage conversion to provide for comparison by operational amplifier that controls variable impedance Q1 and limits current supply to load.

EFFECT: reduced manufacturing cost, improved sparking safety.

19 cl, 3 dwg

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