Patent ID: 8471622

Claim:
An inverter device comprising: a power semiconductor switching device; a freewheeling diode connected in parallel with the power semiconductor switching device, the freewheeling diode comprising a Schottky barrier diode of a wide bandgap semiconductor of SiC, GaN or diamond, a PiN diode, or a MPS diode in which a Schottky barrier diode and a PiN diode are combined; and a gate drive circuit of the power semiconductor switching device, wherein an on-gate resistance of the power semiconductor switching device is set smaller than an off-gate resistance thereof, wherein when a line inductance of the power semiconductor switching device and the gate drive circuit is denoted by L g , a buried resistance of the power semiconductor switching device is denoted by R gin , an input capacitance of the power semiconductor switching device is denoted by C ies , and an on-gate resistance of the power, semiconductor switching device is denoted by R gon , the following condition is satisfied: R gon > 2 ⁢ L g C ies - R gin and wherein a capacitor is provided in parallel with the on-gate resistance of the power semiconductor switching device.