Medium frequency bridge inverter with series oscillatory circuit

摘要

A series oscillatory circuit bridge inverter for feeding an AC network has a transistor bridge (1) with protective diodes and a control unit. The condenser of the oscillatory circuit is designed so that the current through it is discontinuous. The output of the circuit is joined to the input of a rectifier bridge working as a voltage limiter, whose output is parallel to the inverter input. In feed operation, the diodes of the rectifier do not conduct and only conduct when a load feeds back energy or with load shedding, the energy stored in the condenser of the oscillatory circuit is passed to the input of the inverter or a DC source.