Method and apparatus for controlling the rotational speed and ph

Details Method and apparatus for controlling the rotational speed and ph Method and apparatus for controlling the rotational speed and ph

1980-09-16

1983-11-29

Smith, Jr., David

Electricity: motive power systems

Synchronous motor systems

Armature winding circuits

318314, 318702, H02P 540

Patent

active

044183070

ABSTRACT:
A method and apparatus for controlling the rotational speed and phase of a synchronous motor is provided by sensing the motion of the poles with respect to the stator to provide sensor signals. The sensor signals are converted to sensor pulses and compared to constant pulses. Driving pulses are generated so that if the poles run ahead, a braking moment is generated, and if the poles lag behind, an accelerating moment is generated.

REFERENCES:
patent: 3495208 (1970-02-01), Grada
patent: 3532994 (1970-10-01), Ferrier
patent: 3794894 (1974-02-01), Vanleer
patent: 3829747 (1974-08-01), Woolfson
patent: 3909688 (1975-09-01), Blaschke et al.
patent: 4008425 (1977-02-01), Dickey
patent: 4015180 (1977-03-01), Tetsugu et al.
patent: 4085355 (1978-04-01), Fradella
patent: 4099103 (1978-07-01), Seeger et al.

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