SYSTEM, METHOD AND APPARATUS OF SENSOR-LESS FIELD ORIENTED CONTROL FOR PERMANENT MAGNET MOTOR
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United States of America Patent
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app pub date -
Jun 19, 2014
filing date -
Jun 19, 2014
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Abstract
A sensor-less control system, a method and an apparatus of sensor-less field oriented control for permanent magnet motors are provided. The sensor-less control system includes a Clarke transform module, a Park transform module and an angle estimation module. The Clarke transform module generates orthogonal current signals in accordance with motor phase currents. The Park transform module generates a current signal in response to the orthogonal current signals and an angle signal. The angle estimation module generates the angle signal in response to the current signal. The angle signal is related to a commutation angle of the permanent magnet motor. The current signal is controlled approximate to zero. The angle signal associated with an angle-shift signal is configured to generate three phase motor voltages.
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