Speed control arrangements for electric motors

Details Speed control arrangements for electric motors Speed control arrangements for electric motors

1993-10-20

1995-02-07

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318811, 318808, 388829, 388912, 388853, H02P 528

Patent

active

053878566

ABSTRACT:
In a speed control arrangement for an induction motor or an a.c. permanent magnet motor in which any one of a number of power frequencies may be selected for application to the motor, there is provided circuitry to control the rate of change of frequency from one selected power frequency to another to control the acceleration or deceleration of the motor.

REFERENCES:
patent: 4099108 (1978-07-01), Okawa et al.
patent: 4516065 (1985-05-01), Ninomiya et al.
patent: 4599549 (1986-07-01), Mutoh et al.
patent: 5146148 (1992-09-01), Voet
patent: 5175483 (1992-12-01), Fujii et al.
patent: 5179336 (1993-01-01), Orgovan

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