Autonomous inverter

摘要

PCT No. PCT/SU84/00072 Sec. 371 Date Aug. 11, 1986 Sec. 102(e) Date Aug. 11, 1986 PCT Filed Dec. 20, 1984 PCT Pub. No. WO86/03903 PCT Pub. Date Jul. 3, 1986.An autonomous inverter includes a three-phase thyristor bridge (7), a diode bridge (14), commutating capacitors (15), and communicating thyristors (16 and 17). AC leads of the thyristor bridge (7) are connected, via the commutating capacitors (15), to respective leads of the diode bridge (14). DC leads of the diode bridge (14) are connected to the like leads of the thyristor bridge (7) via the commutating thyristors (16 and 17). A master oscillator (24) of the autonomous inverter has the output thereof connected to a first input of a distributing unit (23). The autonomous inverter is also provided with two voltage dividers (18), the first arms of each divider (18) comprising three star-connected resistors (19), while the second arms thereof comprise resistors (20) inserted between the neutral points of the stars and the ground. Outputs of the voltage dividers (18) are connected to inverting and non-inverting inputs of a differential amplifier (21). The output of the differential amplifier (21 ) is connected to a second input of the distributing unit (23) via a hysteresis-type threshold element (22).