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I am learning about Variable Reluctance ( VR ) Stepper Motors. As stated in my reference, they "have no detent torque." What does this mean?

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Detent torque is the torque while coils are not energised. Permanent magnets and the iron stator hold the motor in a given position without any power needing to be applied, although this force is usually much lower than the full torque - in my experience about 10%.

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