Control unit

Details Control unit Control unit

1985-02-01

1986-08-12

Roskoski, Bernard

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318312, 318317, 318636, 318461, H02P 500

Patent

active

046058842

ABSTRACT:
A control unit for a movable member comprises a motor for driving the movable member, a speed detector for detecting a rotating speed of the motor, a reference signal generator, amplifiers of different gains for amplifying a signal representing a phase difference between a speed signal from the speed detector and a reference signal from the reference signal generator, a selector for selecting one of the outputs of the amplifiers in accordance with the velocity signal and the reference signal, and a driver for driving the motor by the selected amplifier output.

REFERENCES:
patent: 3176208 (1965-03-01), Gifft
patent: 3309597 (1967-03-01), Gabor et al.
patent: 3706923 (1972-12-01), Dunfield
patent: 3708737 (1973-01-01), Johnson
patent: 3911343 (1975-10-01), Oster
patent: 4238716 (1980-12-01), Redmond
patent: 4284940 (1981-08-01), Welburn
patent: 4338555 (1982-07-01), Rhodes
patent: 4366422 (1982-12-01), Rhodes
patent: 4374350 (1983-02-01), Kohzai et al.
patent: 4375609 (1983-03-01), Wolf
patent: 4453118 (1984-06-01), Philips et al.

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