Patent ID: 8786227
Filing Date: 2014-07-22
Classification: B60H,F04B,F25B

Abstract:
1. An electric compressor controller comprising: a compressor that compresses refrigerant of an air conditioning system for a vehicle; a motor that drives the compressor; an inverter that selectively controls a plurality of switching elements based on PWM pulse signals to supply drive power to the motor and heats the refrigerant by heat generated due to switching of the plurality of switching elements during a heating operation of the air conditioning system; a plurality of temperature detectors that each detects junction temperature of each of the plurality of switching elements; a drive controller that supplies the pulse signals to the inverter to control the inverter; and a slope varying unit that variably controls a precipitous degree of rising/falling slope waveforms of the pulse signals based on the junction temperature of each of the plurality of switching elements that is detected by the plurality of temperature detectors.