Closed loop rotational speed control system having means for gen

Details Closed loop rotational speed control system having means for gen Closed loop rotational speed control system having means for gen

1977-12-14

1979-12-04

Rubinson, Gene Z.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318331, H02P 506

Patent

active

041774124

ABSTRACT:
A PNM (pulse number modulation) signal is generated in response to a DC signal the magnitude of which is in proportion to the detected rotational speed of an electric motor to regulate a period of time for which an electric power is fed to the motor by switching the electric power in accordance with the PNM signal. The switching frequency is arranged to vary depending on the variation of the load of the motor.

REFERENCES:
patent: 3504260 (1970-03-01), Staples
patent: 3803470 (1974-04-01), Vosteen
patent: 4011491 (1977-03-01), Grover et al.

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