Digital pulse width modulation control of brushless DC motors

Details Digital pulse width modulation control of brushless DC motors Digital pulse width modulation control of brushless DC motors

1986-06-25

1989-12-26

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

318599, 318605, G05B 106

Patent

active

048900478

ABSTRACT:
An improved torque control for a brushless DC motor is disclosed. A torque command A of a time varying nature is applied to an excitation winding which is magnetically coupled through a resolver to produce output signals respectively on sensing windings of Acosine .theta. and of Asine .theta. wherein .theta. is the angular position of an armature and resolver of the motor. Armature windings respectively coupled to the sensing windings are driven by signals proportional to or equal to the signals sensed by the sensing windings to produce a torque equal to A.

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"Velocity and Position Feedback in Brushless DC Servo Systems", PCIM, Aug. 1985, by J. Tomasek, pp. 55-60.
"A New Microprocessor Based Brushless Servo Amplifier for Optimum Current Vector Control." Proc. 13th Annual Symp. Incremental Motion Control Systems and Devices, by S. Meshkat, U. Illinois at Urbana-Champaign, 1983.
"Resolver Commutation of Brushless DC Motors" by J. Cross, R. Lazarski and J. Solt, Motion, Mar./Apr. 1987, pp. 3, 4, and 7-10.
"Brushless DC Motors, A Tutorial Study", by E. Aha, Motion, Mar./Apr. 1987, pp. 20, 23, 24 and 26.

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