Power inverter system and method of starting same at high DC voltage

摘要

Abstract A power inverter system, comprising; a DC to AC inverter comprising a plurality of power semiconductor switching devices; a DC link selectively coupling DC power to the inverter; and a controller configured to increase a gate turn off resistance for each of the power semiconductor switching devices during starting up periods of the inverter system such that the DC link voltage does not exceed the power semiconductor switching device blocking voltage ratings during the corresponding switching turn-off periods, wherein the starting up period is the time required to bring a corresponding DC power source voltage from an open circuit voltage to a predetermined voltage which constitutes a safe operating condition for the plurality of power semiconductor switching devices.