Rotor short-circuiting switch

Details Rotor short-circuiting switch Rotor short-circuiting switch

1977-07-12

1979-02-13

Rubinson, Gene Z.

Electricity: motive power systems

Synchronous motor systems

Field winding circuits

H02P 150

Patent

active

041398076

ABSTRACT:
A transistor switch short-circuits the main field rotor winding of a synchronous machine during start-up. A transistor is connected across the main field rotor winding and is responsive to the polarity of the voltage induced in the main field rotor winding by the main stator winding. When the voltage is of one polarity, the transistor conducts to short-circuit the main field rotor winding. When the voltage across the main rotor winding is of the opposite polarity, diodes limit the voltage buildup. The transistor which shorts the main field rotor winding is rendered inoperative when the machine is operating at or near synchronous speed.

REFERENCES:
patent: 3100279 (1963-08-01), Rohner
patent: 3293518 (1966-12-01), Neumann
patent: 3308362 (1967-03-01), Neumann et al.
patent: 3818294 (1974-06-01), Glukhov et al.

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