Apparatus for removing torque ripples in direct-current motors

Details Apparatus for removing torque ripples in direct-current motors Apparatus for removing torque ripples in direct-current motors

1985-02-04

1987-02-24

Shoop, Jr., William M.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318318, 318254, 318439, 318138, H02P 516

Patent

active

046459910

ABSTRACT:
An apparatus for removing torque ripples comprises a permanent magnet rotor, position sensors, stator armature coils, an operational circuit for effecting an arithmetic operation on detected signals from the position sensors, and a control circuit for driving the stator armature coils. According to another embodiment, an apparatus for removing torque ripples includes a direct-current motor having Y-connected armature coils, a detector for detecting counterelectromotive forces in the direct-current motor, an operational circuit for effecting an arithmetic operation on output signals from the detector, and a transistor for driving the direct-current motor.

REFERENCES:
patent: 3831073 (1974-08-01), Tanikoshi
patent: 3924166 (1975-12-01), Doemen
patent: 4051420 (1977-09-01), Tanikoshi
patent: 4291259 (1981-09-01), Marumoto et al.
patent: 4317072 (1982-02-01), Goof et al.
patent: 4359674 (1982-11-01), Gotou
patent: 4396875 (1983-08-01), Yamauchi
patent: 4412159 (1983-10-01), Uzuka
patent: 4415844 (1983-11-01), Mendenhall et al.

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