Speed control apparatus for movable equipment

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

388815, 388906, 318254, 364157, 364161, H02P 600

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active

050239244

ABSTRACT:
In order to provide a speed control apparatus for a movable equipment having small torque ripples and speed variation, the present invention has a speed control means which comprises a driver for providing a current or a voltage having a magnitude corresponding to the instructed speed, a speed detection circuit for detecting a speed on the basis of a signal from the speed detector and a microcomputer for driving the driver by comparing the speed instruction signal with a speed signal obtained from the speed detection circuit. The microcomputer includes a harmonic wave component detecting means for detecting a harmonic wave component contained in a speed variation mode which is obtained from the speed detection circuit and has a function of making the gain of a speed control system variable by the harmonic wave component detected by the harmonic wave component detecting means.

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patent: 4855652 (1989-08-01), Yamashita et al.
Minimization of Torque Ripple in Brushless DC Motor Drives; vol. IA-22 IEEE No. 4 July/Aug. 1986 NY.

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