Motor rotation controlling device

Details Motor rotation controlling device Motor rotation controlling device

1992-11-05

1994-07-26

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318635, 318807, 318798, H02P 528

Patent

active

053329562

ABSTRACT:
A motor rotation controlling device, usable for example in a video recorder, to minimize transient phenomena at an initial operation and shorten a transient response time for detecting a rotation speed of a motor, a signal processor for constantly controlling rotation speed of the motor by the detected rotation speed supplied from the rotation detector, a comb-shaped filter for removing a rotation period component and its harmonic component included in a control signal supplied from the signal processor, a controller for varying a transfer function of the comb-shaped filter at a transient response time and a normal time according to the rotation speed of the motor, a driving device for driving a motor by the filtered control signal supplied from the comb-shaped filter, and a limit device connected between the signal processing means and the comb-shaped filter for clamping the control signal.

REFERENCES:
patent: 3643073 (1972-02-01), Sawamura
patent: 4197489 (1980-04-01), Dunn et al.
patent: 4254367 (1981-03-01), Sakamoto
patent: 4499413 (1985-02-01), Izosimov et al.

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