REDUCED TORQUE RIPPLE SYSTEM
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United States of America Patent
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Issued Date -
Nov 13, 2014
app pub date -
May 10, 2013
filing date -
May 10, 2013
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An apparatus with reduced torque ripple is disclosed. The apparatus includes a back electromotive force (BEMF) detector, a harmonic identifier, and a compensator circuit. The BEMF detector is configured to detect a BEMF voltage waveform. The harmonic identifier is configured to receive the BEMF voltage waveform and is further configured to identify at least one harmonic contributing to a torque ripple. The compensator circuit is configured to compensate for the at least one harmonic to reduce the torque ripple.
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