System of voltage generation. RU patent 2474941.

IPC classes for russian patent System of voltage generation. RU patent 2474941. (RU 2474941):

H02P9/30 - using semiconductor devices

H02P9 - Arrangements for controlling electric generators for the purpose of obtaining a desired output (Ward-Leonard arrangements H02P0007340000; vector control H02P0021000000; feeding a network by two or more generators H02J; for charging batteries H02J0007140000)

H02H7/06 - for dynamo-electric generators; for synchronous capacitors

Another patents in same IPC classes:

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In startup and deceleration vector control method there determined is frequency and phase of sliding e.m.f. induced in rotor (2) windings with rotary magnetic field of stator (5) and excitation voltage on sliding frequency is supplied by means of frequency converter (1) to rotor (2) windings. Excitation voltage phase is specified relative to sliding e.m.f. phase with offset to advancing side at startup, and to delay side at deceleration, and amplitude is controlled in compliance with the required torque moment. Offset of excitation voltage relative to sliding e.m.f. phase is specified within 80-100 electrical degrees. Device includes frequency converter (1) feeding the rotor (2) winding of asynchronised machine, control device (3), stator (5) voltage sensor (4) of asynchronised machine and rotor (2) position sensor (6). Control device (3) consists of unit (11) that controls the converter in normal operation mode, and unit 12 that controls the converter in startup and deceleration modes. Switch-over of converter is performed with switch (13).

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Invention may be used both for automation of equipment commissioning process and in a functional mode in devices for control of electric generators in order to get the required value of output parameters, in particular, to control generator excitation in order to weaken hazardous effect of overloads or transition processes, for instance, in case of spontaneous connection, removal or variation of a load. The automatic voltage controller of the synchronous generator comprises a voltage metre, the first summator, a PID controller, the second summator, an amplifier, a generator of initiating pulses, a set point generator, an analog to digital converter, a signal energy calculator, a delay unit, a control parameters calculator, an averaging unit. The control parameters calculator is arranged in the form of a processor device operating in accordance with the logic of ultra-fast annealing.

Method and system for current limitation in ac generator / 2461112
According to the method for failure current limitation in an AC generator a superconductive failure current limiter is connected close to the generator to limit current flowing within the generator. Additionally disclosed is a system containing a superconductive failure current limiter, a generator and a circuit.

FIELD: electricity.

SUBSTANCE: 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.

EFFECT: higher reliability of power consumers supply.

1 dwg

The invention relates to the electrical engineering and may be used when designing rotating power generation systems intended for electric equipment of aircrafts and other Autonomous objects.

Known rotary power supplies, for example, from the book. «The electric equipment of aircrafts» Ed. .. Vol.1 Moscow, MPEI. 2005, .287). Includes a synchronous generator voltage, having an independent winding management (excitation). Stabilization of a output voltage of the generator are using thyristor regulator, connected to the winding control. Generation system is complex circuitry and, consequently, the relatively low reliability and unsatisfactory quality of regulation, namely, low dynamic indicators, conditioned by peculiarities of the work of the thyristor converters.

Closest to the invention is generation system voltage containing electric, for example, synchronous generator, winding management (excitation) which, diode controlled by key attached to a power source (Electrical equipment of aircrafts» Ed. .., vol. 1, Moscow, MPEI. 2005, p.289). The disadvantage of this device is the low reliability of power supply of consumers during a short circuit in a controlled manner, and the resulting over-current protection in the control winding of the generator (mode SHORTCIRCUIT winding is directly connected to the power supply) and, respectively, to strain on the output of the generator.

The technical result, which can be achieved using the invention is to increase the reliability of power supply of consumers of electric energy.

The technical result is achieved by the fact that the system generate voltage, containing electric generator voltage direct or alternating current, control or winding winding of the excitation of which, the first diode, through the second diode is connected to the secondary winding of the transformer, and the primary winding of the transformer through managed key attached to a power source and to chain, consisting of winding of the transformer and the third diode, while the second diode is included in the mode of direct transmission of electricity can open a managed way.

In the sources of information information is available about converters of voltage, performed similarly to the regulator current control winding (.. «Stable transistor converters». M. Energoatomizdat, 1986). However, the known devices are designed for power supply of consumers of the given kind of energy, while according to the invention of the well-known scheme is used for the formation of the current control winding of the generator voltage, entering the set of essential features of the system together with the generator having the winding management (excitation). Thus, the use of well-known scheme for catering winding or control of the generator ensures the achievement of the new technical - support of automatic protection of consumers from surges caused by short-circuit control key, that allows to speak about the compliance of the invention criterion of «inventive step».

The drawing is a device's electrical circuit.

The system of generating power, contains electric generator 1 voltage (DC or AC), winding management 2 which, diode 3, through the diode 4 is connected to the secondary winding 5 transformer 6. The primary winding 7 transformer through managed key 8 attached to the power supply 9 and to chain, which consists of winding 10 transformer and diode 11. Diode 4 is enabled in the mode of direct transmission of electricity can open a managed way. The polarity of the enable diode 3 provides continuous current in the winding of the excitation (management) 2.

The device works as follows.

In the operating mode of the value of the output voltage of the generator 1 is controlled by changing the current control winding 2, which is carried out using the transformer 6 and 8 key, dial-up in accordance with the law of pulse-width modulation, for example, in the function of output voltage. The increase in the output voltage of the generator of a given level entails an increase in controlling pulse ratio (decrease fill factor) and, respectively, a decrease in current excitation of the generator, which in turn, leads to decrease the output voltage of the generator. Conversely, the reduction of output voltage leads to the increase in the coefficient of filling the control pulses and growth of voltage of the generator. Thus regulating the stabilization of a output voltage of the generator.

Depending on the design features of the generator 1 coil 2 can be used as an excitation winding or management or both perform both functions.

At 8 closure of the key energy source of power supply 9 through the transformer 6 is passed in the excitation winding 2 generator 1. When opened, the key 8 transformer 6 stops to nourish the excitation winding 2 and demagnetized through the circuit formed by winding 10, diode 11 and power source 9, the continuity of the current in the coil 2 is supported by diode 3.

Short-circuit key 8 secondary voltage 5 transformer disappears, the current through it is reduced to zero, and therefore stops the flow of the current and through the control winding 2 generator 1. The generator is without excitement, that causes the reduction to zero of its output voltage.

Thus, the system is insured against uncontrolled increase in the level of generator output voltage short-circuit in regulatory terms, electricity consumers are protected against overvoltage.

High reliability of work of system generation insured from uncontrolled emergency surge allows it to be recommended when developing rotating electrical sources of wide purpose.

Generation system voltage containing electric generator voltage direct or alternating current, control or winding winding of the excitation of which, the first diode, through the second diode is connected to the secondary winding of the transformer, and the primary winding of the transformer through managed key attached to a power source and to the circuit formed by winding third diode and a source of power through which demagnetized transformer if the input is managed key, the second diode is included in the mode of direct transmission of electricity can open a managed way.