UNINTERRUPTED POWER SUPPLY SOURCE FOR AC LOADS Russian patent published in 2011 - IPC H02M7/42 H02J3/04 

FIELD: electricity.

SUBSTANCE: uninterrupted power supply source (UPS) is arranged in the form of a reversible converter (RC) with an intermediate link of high frequency and ports for connection of a DC source and loads. Besides, the RC is made with two "input-output" ports of power circuits, one of which is made as a port of DC terminals, with an accumulator battery connected to it at the input, and arranged in the form of an input port for operation in inverter mode and an output port for operation in a rectifying mode of RC, and the other port of AC terminals is arranged as an output one in the inverter mode and an input one in the rectifying mode of RC operation, besides, for electric connection between AC and DC terminals of the specified ports there are two links connected as serially joined to each other, one of which is a high-frequency link, and the other one is a link of an industrial frequency autonomous inverter. At the same time both links are equipped with drivers to control power modules. Both links are used with the help of control facilities in inverter and rectifying modes. At the same time in the rectifying mode and during normal functioning of AC circuit the essential loads are connected directly to the main AC circuit via an automatic breaker. At the same time, using control facilities of RC, it ensures generation of a controlled reactive power into an AC circuit, to which a voltage sensor is additionally connected with a voltage controller.

EFFECT: minimised dimensions and weight of an uninterrupted power supply source.

10 cl, 10 dwg