Motor drive with resonance detection and impedance computation
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United States of America Patent
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May 1, 2018
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app pub date -
Jun 6, 2016
filing date -
Jun 6, 2016
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Abstract
Disclosed examples include power conversion systems, computer readable mediums and methods for mitigating input filter resonance, in which a controller operates an active front end (AFE) rectifier in a first mode to turn a single rectifier switching device on and off and measures a filter voltage or current signal while all of the rectifier switches are off. The controller determines a resonant frequency based on a transient response of the measured voltage or current signal, and selectively adjusts a rectifier control parameter to mitigate filter resonance based on the resonant frequency.
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