Open phase detection system and method for three-phase motor
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United States of America Patent
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Jul 30, 2013
Grant Date -
Aug 30, 2012
app pub date -
Feb 29, 2012
filing date -
Aug 31, 2009
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Abstract
An open phase detection system and method for a three-phase motor is provided. The open phase detection system comprises: a signal generating unit coupled to the three-phase motor and configured to generate a driving signal for driving the three-phase motor; a detecting unit coupled to the signal generating unit, and configured to detect whether the signal generating unit generates the driving signal and to detect three-phase current values of the three-phase motor; and a determining unit coupled to the detecting unit, and configured to determine whether the three-phase motor has open phase according to the three phase current values detected by the detecting unit when the driving signal is detected.
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