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System of synchronous generator excitation with controlled external boosting In excitation system of synchronous generator, external DC source (11) is connected parallel to inductor (3) via common electronic switch (12). Current converter (13) is connected in series with armature winding (2) and connected to bypass (14) and second rectifier (15). Excitation system includes analogue to digital converter (16), two storage registers (17, 18), pulse distributor (19), stable frequency pulse generator (20), substractor (21), reference register (22), numeric comparator (23), two differentiators (24, 26), RS trigger (25), logic OR element (27), START bus (28), limiting generator (29), inverter (30), logic AND element (31), resistors from first 32-1 to Nth 32-N and section electronic switches from first 33-1 to Nth 33-N. Resistance Ri of resistor 32-i is determined by formula Ri=R1/2(i-1) where R1 is resistance of resistor 32-1. |
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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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System of synchronous generator excitation with external boosting Excitation system includes synchronous generator (1) with armature (2) and inducer (3) windings, rectifiers (4), (15), summing transformer (5) with primary current winding (6), primary voltage winding (7), secondary winding (8) and control winding (9) and voltage corrector (10), external DC source (11), electronic key (12), current transformer (13) with shunt (14). System contains analogue-to-digital transformer (16), memory registers (17,18), pulse distributor (19), generator of pulses (20) with stable frequency, substractor (21), decoder (22), clamps (23, 24) for load connection, RS-trigger (25), differentiator (26), logic elements OR (27), AND (31), START bus (28), generator-limiter (29), inverter (30). |
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Device for start-up and brushless excitation of non-contact synchronous machine Device includes the main synchronous machine (1), inversed synchronous exciter (2) of the main synchronous machine in a common magnetic system with an asynchronous subexciter made in the form of an asynchronous motor, excitation winding of the synchronous exciter, winding located on the rotor, a rotating semiconductor converter and an excitation control. It is equipped with switching device of modes (7), metre (8) of rotor rotation frequency of the main synchronous machine with an inlet and an outlet and winding switches (9, 10). Winding is made in the form of coil groups in a non-salient pole magnetic system of the stator and the rotor, and the magnetic system is combined as to magnetic flows with smaller number of poles for motor operation and large number of poles for generator operation. |
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Device of electromechanical control Device of electromechanical control includes the second induction motor and the second block of three automatic splitters. The first, second and third outputs of the block from three switchboards are accordingly connected with the first, second and third inputs of the second induction electric motor, rigidly connected to the first induction electric motor, and the first, second and third outputs of the induction generator are accordingly connected to the first, second and third inputs of the second block from three automatic splitters, having the first, second and third outputs of which accordingly connected with the first, second and third inputs of the first block from three automatic splitters, the fourth, fifth and sixth outputs of which are accordingly connected to the first input of the first AC voltage stabiliser, with the second inputs of the first and second AC voltage stabiliser and with the first input of the second AC voltage stabiliser and having a separate input connected to the output of the motor control panel. |
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Electromechanical control device Voltage multiplier, toroidal potentiometer, drive, a unit of two automatic circuit-breakers and commutation switch are introduced into elecrtromechanical control device; at that output of three-phase rectifier is connected to the first input of the automatic circuit-breaker having an output connected to the first input of the unit of two automatic circuit-breakers having the second output and the first and second inputs connected respectively through toroidal potentiometer, through voltage multiplier to the above output of the automatic circuit-breaker, through commutation switch to input of the electric motor, to input of the drive connected rigidly to toroidal potentiometer. |
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Electromechanical control device Voltage multiplier, potentiometer and commutation switch are introduced into the electromechanical control device; at that output of the three-phase rectifier is connected through voltage multiplier, potentiometer and commutation switch to the input of automatic circuit-breaker. |
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Device for magnetic field killing when the synchronous machine excitation winding is disconnected from the power supply contains a switching apparatus (1), placed in parallel to the power supply (2) and the excitation winding (3); connected parallel to the said winding is a circuit consisting of an active resistance (4) and a circuit, placed in parallel; the latter circuit contains two thyristors (5, 6) or a thyristor and a diode, parallel and back-to-back. The device also contains a circuit with low resistance represented by or placed parallel to the circuit excitation winding containing a control key (7) or connected parallel to the active resistance (4) of the circuit containing a diode or thyristor (8) and a capacitor (9), serially placed; connected parallel to the capacitor is a discharge resistor (10). |
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Stabilised electric machine power supply source Device contains a synchronous generator with stator and excitation windings, a rectifier connected to the stator winding, a voltage sensor connected to the rectifier output pins, a voltage setting device, a control circuit and a device for rigid negative feedback; included in the control circuit are additional connected element: a comparison unit, a regulating device, a key element, a reverse diode; additionally introduced are a sensor of excitation current in the excitation winding circuit, a device for isodromic (flexible) negative feedback; functionally. The device is intended for transmission of excitation current oscillations as may occur from the excitation current sensor output to the third input of the comparison unit without phase shift. |
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In the working mode the output voltage value of a generator (1) is controlled due to variation of a control winding (2) current, which is realised with the help of a transformer (6) and a key (8), switched in compliance with a law of width-pulse modulation. When the key (8) is closed, energy of a power supply source (9) via a transformer (6) is sent to an excitation winding (2) of a generator (1). When opening the key (8) the transformer (6) stops supplying to the excitation winding (2) and is demagnetised via a circuit formed by a demagnetisation winding (10), a diode (11) and a source of supply (9), (continuity of current in the winding (2) is maintained due to the diode (3). In case of a short circuit of the key (8) the voltage on the secondary winding (5) of the transformer disappears, current through it reduces down to zero, and accordingly, current leakage also stops via the control winding (2) of the generator (1). The generator stays without excitation, which causes reduction of its output voltage down to zero. The system is insured against uncontrolled increase of generator output voltage level in case of a short circuit in a control key, and power consumers are protected against overvoltage. |
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Device to control output voltage of power generator In a device to control output voltage of a power generator (1), comprising a generator winding (2) and an excitation winding (3), wound onto a stator, a magnetising winding (5), wound onto a rotor, and a rectifier (12), which rectifies current generated by the excitation winding (3), and sends rectified current to the magnetising winding (5), output voltage is compared, generated by the generator winding (2), with a reference oscillation, distortion ratio of which is 0%, based on results of this comparison, the generation unit (24) adjusts the moment of generation of output width and pulse modulation signals, and also there is a circuit to generate a magnetising current (20), which sends magnetising current to a magnetising winding (5). |
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System of excitation of synchronous generator Invention relates to the field of electrical engineering and may be used in electric machines for control of excitation of synchronous generators applied in autonomous sources of electric energy. The technical result is expansion of functional possibilities. The excitation system comprises a synchronous generator (1), a winding of an anchor (2) and an inductor (3), the first rectifier (4), the summing transformer (5) with the primary current (6) winding and the primary voltage winding (7), the secondary (8) winding and the control winding (9), a voltage corrector (10), an outer source of DC current (11), an electronic key (12), a current transformer (13) with a shunt (14) and the second rectifier (15), an analog to digital converter (16), the first (17) and the second (18) registers of memory, a pulse distributor (19), a pulse generator (20) of stable frequency, a subtractor (21), a setting register (22), a numerical comparator (23), the first differentiator (24), an RS-trigger (25), the second differentiator (26), a logical OR element (27), a START bus (28), a shaper-limiter (29), an inverter (30) and a logical AND element (31). |
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Device to control excitation of synchronous generator Device to control excitation of a synchronous generator comprises a metre of rotor current, a metre of stator current and voltage, a unit of feedback by excitation current, a metre of active power, a sensor of generator voltage frequency, a unit of analog-to-digital conversion, an operational unit, a unit of digital-to-analog conversion and a unit of parameters adaptation. The operational unit and the unit of parameters adaptation are arranged as specified in the application materials. |
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Device for protection of self-excitation generator phase-advance load In the self-excitation generator 1 containing an automatic voltage regulator 10 the phase-advance protection device contains: magnetisation current control shaper 21 (serially connected to the magnetised winding 6 and switched over to the open and closed position with control circuit 23 ARN 10 for supply of magnetisation current to the magnetised winding 6), a shaper of rotor short-circuit for phase-advance load 22 protection (connected in parallel to the magnetised winding and supplying short circuit current to the magnetised winding 6 when switched over to the open position) and a compensatory feedback circuit 30 connected as the power supply source of the magnetisation current control shaper and the shaper of rotor short-circuit for phase-advance load protection; the compensatory feedback circuit 30 contains a capacitor 32 where charge is accumulated while the magnetisation current control shaper 21 is in the open position. |
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Device to control output signal of generator Output signal control device comprises an electric generator (100), which comprises a generator winding (103), an excitation winding (104) and a magnetising winding (102). To reduce the output voltage of the generator winding (103) to the specified value, the magnetising current is varied by increasing/decreasing the duty factor of current flow in a switching element (110), connected to the magnetising winding (102). When a unit of zero duty factor detection (2) and a unit of zero duty factor detection (3) identify that the output duty factor with a zero value continues for a preset period of time, a unit of duty factor value increase limitation (4) limits the upper limit value of the duty factor by the specified preset value as the magnetising current increases. Instead of detection of a zero value of the duty factor a unit of duty factor limitation (21a) may used to limit the duty factor with a maximum value determined by voltage of a smoothening capacitor (SC). |
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Device to control power generator output voltage Power generator (100) comprises a generator winding (103), an excitation winding (104) and a magnetising winding (102). A smoothing capacitor (113) smoothes current generated by the excitation winding (104) and sends this current to the magnetising winding (102). A transistor (110) provides for PDM control so that the output voltage of the generator winding (103) reduces to the preset voltage. There is a diode (112), which locks the reverse flow of the magnetising current. The transistor (10), which is connected in parallel to the diode (112), is controlled as antiphased with the current of transistor (110) control. |
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Wind-driven power plant voltage and frequency regulation device Wind-driven power plant voltage and frequency stabilisation device comprises a windwheel joined with a multiplier, the outlet of which is connected via a drive shaft with an electromagnet coupling comprising a control winding, with a rotor of a synchronous generator with permanent magnets, the following components are connected to the generator outlets - an assembly of excitation capacitors, an assembly of voltage regulation, an assembly of frequency regulation, the voltage regulation assembly comprises the first transformer-rectifier unit, a master oscillator, a pulse shaper, the first pulse amplifier, the first transistor, the emitter-collector transition of which is serially connected to a magnetisation winding placed in slots of the synchronous generator stator with permanent magnets with the main winding, the frequency regulation assembly comprises a generator of master pulses, the second pulse amplifier, the second transformer-rectifier unit and the second transistor, the emitter-collector transition of which is serially connected to the control winding of the electromagnet coupling. |
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Method provides automatic excitation control of a synchronous drive motor of a multimachine aggregate of an excavator by excitation current regulation according to a specific signal which is generated as total reference constant signal, first correcting signal generated as constant voltage if observing an effective value of power voltage decreased below an allowable level, and second correcting signal generated as constant voltage if observing a command device in a lifting position exceeding a preset threshold value, measurement of total electric capacity of main motion drives, addition of the derived value and the reference signal and the first correcting signal, comparison of two calculated totals and generation of the specific excitation current signal equal to a maximum of two totals. |
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Electromechanical device keeps continuous rotation of electric motor shaft at lower power of power supply owing to introducing storage battery of lower power and voltage multiplier; at that, output of storage battery of lower power is connected through voltage multiplier to the first input of automatic release mechanism. |
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Invention refers to the sphere of electric engineering and may be used in AC generators. Ready-fitted generator includes generator facilities and the first converting element (11). Generator facilities are intended to convert mechanical energy into electric energy and comprises AC generator (2), voltage controller (4) and element of AC connection. Voltage generator (4) is intended to control magnetisation of AC generator (2) on the basis of data corresponding to voltage of AC connection element of generator facilities. AC connection element is intended to transfer electric energy from AC generator (2) to the first conversion element (11), which is designed to rectify voltage applied to AC connection element, into DC voltage. The first converting element (11) is also intended to control capacity of AC generator by variation of moment-corresponding component (Iq) of current, passing in AC connection element (2), to provide for required value of AC generator capacity. |
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Method and device of current control in excitation windings of electric machines In control method and device the independent current control in excitation windings of electric machines is performed owing to smooth change of input electric resistance of the device. For that purpose, to power source enveloped with bypass diode there connected through reactor is intermediate accumulator of electric energy of high capacity. Smooth current control in excitation windings is provided with double-action power semiconductor devices which are connected to energy storage unit. |
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Self-contained power supply system Self-contained power supply system increases the operating time owing to introduction of unit consisting of two automatic tripping devices and battery charging device. The first and the second output of synchronous generator with exciter is connected to the first and the second input of unit consisting of two automatic tripping devices, which has the third input and the first and the second outputs, which are connected to output of automatic power control unit and through battery charging device - to the first and the second inputs of storage battery. |
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System of static exiter for generator and method of its operation Invention refers to the field of electric engineering and can be used for exiting widely used generators. System (20) of static exiter of exiting winding (17) of generator (16) connected to power supply system via bus (19) contains the first facility (12, 18, 21) for obtaining constant voltage. The first facility is connected to exiting winding (17) and together with exiting winding (17) forms exiter target. Static exiter system contains the second facility (23; 29, C1,…,C3) intended for electric energy feeding. The second facility (23; 29, C1, …, C3) supplies additional energy to exiter circuit for short period when it is required. Exiter system of such type provides possibility of short-term increase of exiting by simple, functionally reliable and providing space saving method by including diode (22) with direct offset into exiter circuit and due to possibility to connect the second facility (23) to diode (22) in direction of reverse offset to supply energy to exiter circuit. |
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System for power supply of objects System comprises electric motor, which is rigidly connected with synchronous generator with exciter, having the first, second and third outlets, which are joined to the first, second and third outlets of consumed units. The first outlet is also connected through three-phased stabiliser and rectifier with the second inlet of automatic splitter, having the first inlet, connected to outlet of current source and having outlet connected to inlet of electric motor. System provides for possibility to use single-phased stabiliser with rectifier having inlet connected only with the first outlet of synchronous generator with exciter as stabiliser. |
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Generator plant for automobiles Invention may be used in transport means as energy source. Technical result is achieved by the fact that in basic circuit of amplifying transistor of voltage controller, a control transistor is included, basis of which and basis of control transistor of starter connection relay via dividing diodes are connected to detector of oil emergency pressure alarm, winding of starter connection relay is included into collector circuit of transistor control and is energised from accumulator battery via switch of ignition and starter. |
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Direct current generation plant Invention concerns electric equipment of cars and track vehicles and can be applied as power source in electric supply system. Effect is intended for construction simplification and improvement of onboard network power quality. Effect is achieved by generation plant including direct current generator, excitement relay and voltage controlled with key transistor feeding exciting coil of generator, two amplifier cascades on transistors and gauge device including voltage splitter consisting of upper and lower arm, and stabilivolt with resistor. Additionally the plant includes diode connecting generator output to accumulator, so that diode anode is connected to generator output and cathode is connected to positive accumulator output, and voltage controller circuit includes additionally two transistors, two resistors connected in sequence to collector chains of transistors, potentiometre connected parallel to diode linking generator output to accumulator, with middle output of potentiometre connected to base of first additional transistor, emitter of which is connected to anode of diode parallel to potentiometre, and collector with second additional transistor base and one resistor output, the second output of which is connected to negative bus of voltage controller, second additional transistor connected together by resistor to collector chain are connected parallel to upper arm of voltage splitter in voltage controller. Addition of diode connecting generator output to accumulator allows exclusion of reverse current relay or device with its functions, and differential minimum relay from generation plant circuit, thus simplifying construction and layout of generation plant. At the same time the diode (when voltage drops) can be used as current indicator, and addition of two extra transistors, two resistors and potentiometre to voltage controller layout allows using voltage controller for generator current limitation as well, thus simplifying controller relay construction, and generator current is limited by electronic means. |
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System of autonomous electric power supply System of autonomous electric power supply consists of a source of direct current, a rheostat, automatic tripping device, the electric motor of direct current, the synchronous generator with the activator, the unit of automatic adjustment of the feed, the three-phase rectifier with a ripple filter and consumed units. The output of the source of direct current through a rheostat is connected to the second input automatic tripping device, which has the first input and the output accordingly connected to an output of the electric motor of direct current and through the unit of automatic adjustment of a feed - with an output of the three-phase rectifier with a ripple filter. The first, second and third inputs of the three-phase rectifier are accordingly connected to the first, second and third inputs of consumed units, and also with the first, second and third outputs of the synchronous generator with the activator. Electromagnetic coupling is rigidly connected with the electric motor of direct current and with the synchronous generator with the activator and has the input connected to an output second automatic tripping device, which has the first and second inputs connected according to the output of the rheostat and with the output of the block of automatic adjustment of the feed. |
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Device for controlling synchronous generator with precision control system Device for controlling synchronous generator with precision control system contains controlling unit, generator stator winding, connected in a "star", excitation winding, controlling unit, two three-phased rectifiers. To each rectifier a smoothing filter with voltage stabilizer is connected. Controlling unit is made in form of two-cascade key amplifier on transistors, six limiting resistors, two inverters made on Schmitt triggers, emitter repeater, connected to each other and to device elements in accordance to formula of the invention. |
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Device for stabilizing power voltage of automatics devices on vehicles In accordance to the invention, in a device, containing generator with self-excitation, rectifier, smoothing filter, load, bridged by diode in reverse direction, source of stabilized voltage, frequency detector, output of smoothing filter is connected to input of generator voltage regulator, output of which is connected to control input of first key element, output of which is made in form of transistor, coupled between output of smoothing filter of rectified voltage of generator and excitation winding of generator, bridged by diode in reverse direction, to output of smoothing filter the input of first threshold element is connected, first output of which is connected to controlling input of second key element, output element of which is made in form of normally closed relay contact, which bridges the transistor of the first key element, and second output of first threshold element is connected to first controlling input of third key element, coupled between output of smoothing filter and load, output of frequency detector is connected to input of hysteresis threshold element, output of which is connected to second control input of third key element. |
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Newly introduced in voltage regulator circuit are two additional transistors, two resistors, and potentiometer; resistors are series-connected into collector circuits of transistors and potentiometer is connected in parallel with one of diodes of generator plus bus; central lead of potentiometer is connected to base of first additional transistor whose emitter is connected in parallel with anode of diode parallel-connected to potentiometer and collector of this transistor, to base of second additional transistor and to one lead of resistor whose other lead is connected to minus bus of voltage regulator; second additional transistor and resistor also connected into its collector circuit are connected in parallel with upper arm of voltage-regulator divider; minus bus of voltage regulator is connected to motor-car ground through circuit breaker. |
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Synchronous generator with precision control system Proposed synchronous generator has precision control system, stator windings, and field winding, as well as two bridge rectifiers; field winding is connected to output of first rectifier and control unit, to output of second rectifier; stator winding leads are interconnected in star; auxiliary leads are connected to input of first rectifier. Field winding is made in the form of parallel-interconnected coils which are connected to first-rectifier output. Second-rectifier input is connected to loose leads of stator winding. Control unit is built of regulating assembly and control device. Regulating-assembly inputs are connected to control device through its regulating member and its outputs are connected to field winding. Inputs of control device are connected to second-rectifier output and outputs, to regulating assembly. |
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Newly introduced in voltage regulator that has metering section 1, reference-voltage supply 6, comparison circuit 2 whose inputs are connected to outputs of reference-voltage supply 6 and metering section 1, power transistor 8, controlled multivibrator 4, AND gate 3 whose output is connected to control input of multivibrator 4 whose output is connected to base of transistor 8, diode 10, inductance coil 9 and capacitor 11, frequency comparator 7, arc-formation rate sensor 5 whose output is connected to input of frequency comparator 7, output of the latter being connected to first input of AND circuit 3 and that of comparison circuit 2, to second input of AND circuit 3, are microphone 12 disposed in storage battery monoblock unit, amplifier 12, band filter 14, detector 15, and comparator 16 whose output is connected to third input of AND circuit 3. |
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Autonomous electric power system Autonomous electric power system additionally contains three-phased rectifier with smoothing filter, automatic release and block for automatic power adjustment. First, second and third outputs of synchronous generator with excitation device are connected respectively to first, second and third inputs of three-phased rectifier with smoothing filter. Output of rectifier is connected through automatic power adjustment block to first input of automatic release. Second input of release is connected to rheostat output. Output of release is connected to input of direct current electric motor. |
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Segmental power generator control system Proposed device has field winding, stator windings, rectifier circuit diodes, voltage regulator, and storage battery, as well as newly introduced step-up transformer with windings, diode, and storage capacitor. |
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Pulse-operated voltage regulator Proposed voltage regulator has metering section, reference-voltage supply, comparison circuit, power transistor, controllable multivibrator, AND gate, diode, inductance coil, capacitor, frequency comparator, sparking frequency sensor, and pulse-operated step-down voltage stabilizer. |
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Dc generator voltage regulator Proposed dc generator voltage regulator has fuse, voltage measuring element, transistor switch, self-excitation relay, two diodes, overvoltage protective unit, and two resistors. Overvoltage protective unit is provided with output break contact and its measuring input is connected to third lead of voltage regulator which is connected to plus bus through series-connected transistor switch shorted out by break contact of self-excitation relay and through output break contact of overvoltage protective unit; power bus of overvoltage protective unit is connected to cathode of second diode and its common bus, to minus bus. |
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Power supply system for feeding mobile objects at two voltage levels Proposed power supply system designed for installation in mobile objects equipped with 12-V charging system which is connected to first-level storage battery and through first contact members of newly introduced controlled switching device built around contactor whose coil is connected to IGNITION switch, to input of semiconductor converter whose output is connected through second contact members to second-level storage battery. Voltage divider is connected through first and second contact members of switching device to second-level storage battery; input-current feedback is applied to input of semiconductor converter. |
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Proposed voltage regulator has power transistor switch, dropping diode, comparator, circuit of series-connected controlled current sources, and measuring element that generates control currents with antiphase ac component for controlled current sources. Newly introduced in device are temperature sensor protection unit, two controlled switches, regulated power supply, capacitor connected through one lead to comparator input and to point of connection of controlled current sources, its other lead being connected to output and common leads of regulated power supply. |
Another patent 2513118.