Compressor driving device, compressor including the same, and refrigeration cycle apparatus including the compressor driving device and the compressor
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United States of America Patent
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Oct 30, 2018
Grant Date -
May 18, 2017
app pub date -
Jun 19, 2015
filing date -
Jun 24, 2014
priority date (Note) -
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Abstract
A compressor driving device includes: a controller that PWM drives a compressor; an inverter circuit unit that supplies power to an electric motor included in the compressor; a drive circuit that drives the inverter circuit unit according to a control signal; a voltage detector that detects a voltage that is output to the electric motor; and a current detector that detects a current that is output to the electric motor. When a product of a detection value of the voltage detector and a detection value of the current detector is greater than a predetermined comparison value, a duty ratio of the control signal is reduced to cause the input power supplied to the electric motor by the inverter circuit unit to have a predetermined input power level or less.
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