Assertion: rotor's magnet | /r/HasProperty | pm
Facets:
Source sentences:
text: A free-hanging wire was dipped into a pool of mercury, on which a permanent magnet (PM) was placed.
text: Active rotor: permanent magnet (PM)
text: Most DC motors are small permanent magnet (PM) types.
text: Hybrid stepper motors combine aspects of both permanent magnet (PM) and variable reluctance (VR) stepper motors.