Rotor position sensing apparatus and method using piezoelectric sensor and hall-effect sensor
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United States of America Patent
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Feb 8, 2011
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Dec 7, 2007
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Dec 7, 2006
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Abstract
A position observer for control-based torque ripple mitigation in permanent magnet synchronous machines (PMSMs). Rotor position is determined using data from two sources: a piezoelectric sensor for initial position and low-speed detection, and a single Hall-effect sensor for high-speed detection.
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