Motor speed controlling device

Details Motor speed controlling device Motor speed controlling device

1984-10-30

1986-07-15

Roskoski, Bernard

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318314, 318327, 318329, 318318, H02P 706

Patent

active

046008675

ABSTRACT:
A motor speed controlling device comprises a rotating shaft connected to an axle and having rotation speed (set speed) varying with the passage of time, a motor with an output shaft connected to a pointer of a speedometer by means of an eddy-current coupling, rotation detectors generating pulse signals respectively proportional to the rotation speed in the rotating shaft and the output shaft and having the same frequency and the same pulse width at the same rotation speed, a logical operation circuit for discriminating the binary state of both pulse signals, and an integrating circuit which increases driving signal to the motor at a definite gradient when one pulse signal is in the 1 state and the other pulse signal is in the 0 state and decreases the driving signal at a definite gradient when one pulse signal is in the 0 state and other pulse signal is in the 1 state and holds the driving signal to the constant value when both pulse signals are at the same level. The rotation speed of the motor accurately follows the set speed according to the driving signal varying as above described and the speedometer pointer connected through the eddy-current coupling to the motor indicates the vehicle speed.

REFERENCES:
patent: 3298622 (1967-01-01), Raymond et al.
patent: 3401321 (1968-09-01), Miki
patent: 3976926 (1976-08-01), Egbert
patent: 4061950 (1977-12-01), Kayanuma
patent: 4079302 (1978-03-01), Norton
patent: 4123779 (1978-10-01), Goldschmidt
patent: 4354146 (1982-10-01), Tenmyo et al.
patent: 4366422 (1982-12-01), Rhodes
patent: 4430606 (1984-02-01), Otsuki et al.
patent: 4443742 (1984-04-01), Schneider

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