MOTOR CONTROL DEVICE AND MOTOR CONTROL METHOD
PROBLEM TO BE SOLVED: To provide a motor control device and a motor control method that can detect an offset amount of an angle sensor with ease.SOLUTION: A motor control device according to an embodiment controls a permanent magnet type synchronous motor. The motor control device comprises a curren...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a motor control device and a motor control method that can detect an offset amount of an angle sensor with ease.SOLUTION: A motor control device according to an embodiment controls a permanent magnet type synchronous motor. The motor control device comprises a current controller, a phase detector, and a calculation unit. The current controller changes a d-axis current value of a current flowing in the synchronous motor. The phase detector respectively detects a first phase of such a minimum current that a positive torque of the synchronous motor becomes maximum, and a second phase of such a minimum current that a negative torque of the synchronous motor becomes minimum, on the basis of the d-axis current value and a q-axis current value in a case where the current controller changes the d-axis current value. The calculation unit calculates an offset amount of an angle sensor that detects an angular position of the synchronous motor on the basis of the first and second phases detected by the phase detector.SELECTED DRAWING: Figure 1A
【課題】角度センサのオフセット量を容易に検出することができるモータ制御装置およびモータ制御方法を提供すること。【解決手段】実施形態に係るモータ制御装置は、永久磁石型の同期モータの制御を行う。モータ制御装置は、電流制御部と、位相検出部と、算出部と、を備える。電流制御部は、同期モータに流れる電流のd軸電流値を変化させる。位相検出部は、電流制御部がd軸電流値を変化させた場合の、d軸電流値およびq軸電流値に基づき、電流が最小で同期モータの正トルクが最大となる電流の第1位相、および、電流が最小で同期モータの負トルクが最小となる電流の第2位相をそれぞれ検出する。算出部は、位相検出部が検出した第1、第2位相に基づいて同期モータの角度位置を検出する角度センサのオフセット量を算出する。【選択図】図1A |
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