PARALLEL INVERTER OPERATING SYSTEM

摘要

PURPOSE:To provide a parallel inverter operating system, in which inverters are protected by preventing a transverse current between the inverters operated in parallel. CONSTITUTION:An auxiliary inverter control unit is synchronized with a main inverter control unit. An operating system includes an adder 44 for adding current detection signals after a current detection signal for detecting an output current (IM) of a main inverter 11 or a current detection signal for detecting an output current (IS) of an auxiliary inverter 12 is inverted. The added signal is multiplied by an output phase of the power with a multiplier to generate an output to the auxiliary inverter control unit.