Motor drive device
A motor drive device is provided which allows control to be performed depending on a position of magnetic poles of a rotor even when a motor rotor angle sensor malfunctions. The device controls a motor for driving a wheel of an electric vehicle, depending on the position of the magnetic poles by using an angle sensed by the angle sensor provided at the motor. The device includes an estimator estimating an angle of a rotor of the motor without using a rotation sensor; a sensor malfunction determiner determining a malfunction of the angle sensor; and a switcher causing control to be performed using a angle estimated by the estimator instead of the angle sensed by the angle sensor once the determiner determines that the angle sensor malfunctions.
NTN CORPORATION
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B60L B60L B60L B60L H02P Y02T B60L H02P B60L Y02T B60L B60L B60L B60L B60L B60L Y02T B60L B60L H02K B60L B60L H02P H02P
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Hiroyuki
Yamada