Electric compressor controller
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United States of America Patent
Stats
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Jul 22, 2014
Grant Date -
Jan 5, 2012
app pub date -
Jun 9, 2011
filing date -
Jul 2, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An electric compressor controller includes a compressor that compresses refrigerant of an air conditioning system; a motor that drives the compressor; an inverter that selectively control 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 switching elements during a heating operation; temperature detectors each detects junction temperature of each of the 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 precipitous degree of rising/falling slope waveforms of the pulse signals based on the junction temperature detected by the temperature detectors. According to the electric compressor controller, efficiency for heating refrigerant is improved, so that its own heating ability is improved.
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