Control system for a permanent magnet motor

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...

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Details

318798, 318800, 318811, 318599, 388928, H02P 517

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active

059534915

ABSTRACT:
The speed of a rotor in a two-winding, permanent magnet motor can be accurately controlled with a dual-polarity pulse width modulation drive signal. The phase back emf signal generated in the non-excited winding is compared against the phase of a command signal and the results of the comparison are used to vary the duty cycle of the drive signal.

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patent: 4839754 (1989-06-01), Gami et al.
patent: 5023527 (1991-06-01), Erdman et al.
patent: 5637971 (1997-06-01), Pratt

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