Variable speed electric induction motors without brushes

Details Variable speed electric induction motors without brushes Variable speed electric induction motors without brushes

1983-06-14

1985-02-19

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Secondary circuit control

318821, H02P 540

Patent

active

045008264

ABSTRACT:
A variable speed induction motor includes a photo-electric cell which controls the current delivered the rotor induction coils. The control is effectuated by the use of controlled diodes, the control electrodes of which are electrically connected to the photo-electric cell. The resistance of the photo-electric cell can be varied by an external, operator-controlled light source. Thus, the speed of the motor, which is proportional to the current in the induction coils, is controlled by the operator through the use of the light source.

REFERENCES:
patent: 3335348 (1967-08-01), Gossel
patent: 4243926 (1981-01-01), Phillips
patent: 4329603 (1982-05-01), Ballard

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