CONTROL METHOD OF MULTI-ZONE RECTIFIER-INVERTER CONVERTER OF SINGLE-PHASE ALTERNATING CURRENT Russian patent published in 2020 - IPC H02M1/42 H02M5/257 B60L9/12 B60L9/20 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used to control multi-zone rectifier-inverter converter on electric rolling stock (electric locomotives and electric trains), which is powered by single-phase alternating current contact network. In the method of controlling the multi-zone rectifier-inverter converter of single-phase alternating current, the circuit of the rectified current of the converter is shunted by a chain consisting of series-connected power diodes and transistor and anode-connected diode to anode and transistor emitter to converter cathode bus, in which capacitor is connected in parallel to diode, and to transistor counter-parallel second power diode, include and contactless disconnection of chains at required time moments by means of transistor. In each half-period of the mains voltage, the rectifier circuit of the converter is shunted by a chain by switching on a transistor, which is controlled by supplying the unlocking control signal thereto at times ωt = π-25° and ωt = π-25°, and contactless disconnection of the chain is carried out by switching off the transistor, which is controlled by supplying a control signal to it at times ωt = 25° and ωt = π+25°. Method of multi-zone rectifier-inverter converter of single-phase alternating current is implemented in device containing transformer, rectifier-inverter converter based on parallel thyristor bridges, chain consisting of series-connected power diodes and transistor and connected by anode of diode to anode and emitter of transistor to cathode bus of converter, in which capacitor is connected in parallel to diode, and to transistor counter-parallel the second power diode, and circuit of rectified current of converter (current consumer in rectifier mode or voltage source in inverter mode).

EFFECT: technical result is increase of power factor of rectifier-inverter converter of single-phase alternating current at rated load on 4^th zone in rectifier mode from 0,86 to 0,98, and in inverter mode - from 0,82 to 0,97.

1 cl, 3 dwg