Patent ID: 8182245

Claim:
An inverter driven compressor operating method for operating an inverter driven compressor that compresses a refrigerant, said inverter driven compressor being driven by a motor that is supplied with an alternating current from an inverter having a high-arm-side switch and a boot capacitor functioning as an operating power supply for outputting a switch signal to said high-arm-side switch, comprising the steps of: performing a normal operation in which said compressor is operated; and performing an operation of charging said boot capacitor prior to said normal operation at a carrier frequency that is lower than a carrier frequency for said normal operation, wherein the carrier frequency for said boot capacitor charging operation is equal to or lower than a carrier frequency for a preparatory operation performed prior to said normal operation, the inverter comprises a low-arm-side switch, and the boot capacitor is provided between a connection point between the high-arm-side switch and the low-arm-side switch, and another connection point between a diode and the high-arm-side switch.