Motor drive control using pulse-width modulation pulse skipping
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United States of America Patent
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Dec 26, 2017
Grant Date -
Jul 21, 2016
app pub date -
Jan 18, 2016
filing date -
Aug 10, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A control circuit for a motor of a compressor includes an inverter control module configured to control power switching devices of an inverter to generate output voltages from a DC power supply. The output voltages are applied to windings of the motor. A current control module is configured to generate voltage signals based on a torque demand. The inverter control module controls the power switching devices according to the voltage signals. A selector is configured to output one of an open loop torque value and a closed loop torque value as the torque demand. An open loop torque module is configured to generate the open loop torque value. The open loop torque module is configured to apply an upper limit to the open loop torque value. The upper limit is based on a voltage of the DC power supply.
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