SU1739459A1 - Inverter control method - Google Patents

Abstract

SUMMARY OF THE INVENTION: A method for controlling an inverter, made in the form of cells on controllable gates, in which two consecutive and control pulses of the unlocking polarity are formed from the harmonic signal and fed to the control inputs of the corresponding gates, the pulses of the blocking field are generated These signals are supplied simultaneously with the supply of control pulses of the unlocking polarity to the control inputs of those valves to which these pulses are not supplied. 2 Il.

Description

The invention relates to the field of radio and electrical engineering and converter technology and can be used in devices that convert voltage or current, for example, in inverters (key generators) and in secondary power sources.

The aim of the invention is to increase the reliability of the inverter.

The proposed inverter control method can be used in inverter circuits designed to work as converters, generators, and others. The proposed method can be implemented in a device, for example, in a single-cell inverter.

FIG. 1 shows the scheme of the proposed inverter; in fig. 2 - timing diagrams for the operation of the device.

The inverter contains a master oscillator 1 of harmonic signals, the output of which is connected to the input of a former 2 rectangular pulses. The output of the driver 2 is connected to the driver of the control pulses 3 of the unlocking polarity, the driver of the four pulses of the closing polarity and the synchronization circuit 5. The output of the imaging unit 3 is connected to the first input of the distributor 6 of control pulses of the unlocking polarity, and the output of the imaging unit 4 is connected to the first input of the distributor 7 of pulses of the locking polarity. The output of the synchronization circuit 5 is connected to the second inputs of the valves 6 and 7. The first output of the valves 6 is connected to the input of the amplifier 8 of control pulses of the unlocking polarity, and the second output of the valve 6 is connected to the input of the amplifier

9 control pulses of unlocking polarity. Similarly, the first output of the distributor 7 is connected to the input of the amplifier

10 pulses of the locking polarity, and the second output of the distributor 7 is connected to the input of the amplifier 11 pulses of the locking polarity. The first and second outputs

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the amplifier 8 is connected respectively to the first and second terminals of the transformer 12, and the first and second outputs of the amplifier 9 are connected respectively to the first and second terminals of the transformer 13. The first and second outputs of the amplifier 10 are connected respectively to the third and fourth terminals of the transformer 13, and the first and the second outputs of the amplifier 11 are connected respectively to the third and fourth outputs of the transformer 12. The fifth and sixth terminals of the transformers 12 and 13 are connected to the corresponding first and second control inputs of the inverter 14, the output which is connected to the load 15.

The proposed method is implemented as follows.

A sinusoidal signal (Fig. 2a) from the output of the generator 1 is fed to the converter 2, which forms a sequence of, for example, rectangular pulses (Fig. 26), close to the square wave, with a frequency equal to the frequency of the signal from the generator 1, and incoming at the same time, on the shaper 3 of the sequence of control pulses of the unlocking polarity, the shaper 4 of the sequence of pulses of the locking polarity and the synchronization circuit 5. The pulses formed in amplitude and duration (Fig. 2c) from the output of shaper 3 arrive at the first input of the distributor 6, and the pulses of the locking polarity formed in amplitude and duration (Fig. 2d) arrive at the first input of the distributor 7.

The distributor 6 from the sequence of pulses arriving at its first input generates on the first and second outputs two sequences of control pulses of the unlocking polarity (Fig. 2e, e), shifted relative to each other, for example, by time T / 2 (T - period oscillation frequency) and coming from the outputs of the distributor 6 to the inputs of amplifiers 8 and 9). Similarly, from the outputs of the distributor 7, two sequences of pulses of the locking polarity (Fig. 2g, h), also shifted relative to each other by T / 2, are fed to the inputs of amplifiers 10 and 11.

The synchronization circuit 5 generates from the input pulse sequence (Fig. 26) pulses with the necessary parameters (amplitude, duration, frequency) following the output of the circuit at certain points in time simultaneously to the second inputs of the distributors 6 and 7 and controlling the operation of both distributors. The control pulses of the unlocking polarity (Fig. 2d) from the first output of the distributor 6 and the pulses of the locking polarity (Fig. 2h) from the second output of the distributor 7, amplified to the required amplitude, from the outputs of the amplifiers 8 and 11, arrive respectively at the windings with the first the fourth terminals of the transformer 12, from the output of which a sequence of pulses (FIG. 2i) is fed to the first control input of the inverter 14. Similarly, the control pulses of the unlocking polarity (FIG. 2e) from the second output of the distributor 6 and the pulses of the locking field ph The cores (Fig. 2g) from the first output of the distributor 7, amplified to the required amplitude, from the outputs of amplifiers 9 and 10, respectively, go to the windings with the first to fourth terminals of the transformer 13, from the output of which the sequence of pulses (Fig. 2k) goes to the second control input of the inverter 14,

The positive effect of the invention is to increase the reliability of the inverter by blocking other control inputs with locking pulses.

Claims (1)

Invention Formula A method of controlling an inverter, made in the form of cells on controllable gates, in which two sequences of control pulses of the unlocking polarity are formed from the harmonic signal for each of the cells and are fed to the control inputs of the corresponding gates, in order to increase reliability, they form the locking polarity pulses, which simultaneously supply the control pulses of the unlocking polarity to the control inputs of those gates to which these pulses are not supplied. CM "about Tv 111 SD h Lj