Process and device for supplying a polyphase electric motor duri

Electricity: motive power systems – Induction motor systems – Primary circuit control

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318431, 323238, H02P 126

Patent

active

057214786

ABSTRACT:
A motor is supplied with electricity across a transformer (T) which outputs on a busbar (J) which is connected to the motor (M) and to other electrical energy consuming devices, the motor by itself consuming an active power greater than or equal to 20% of the available electric power. During at least a part of the starting period of the motor, the motor is supplied with reduced voltages taken on intermediate taps (P.sub.1, P.sub.2, P.sub.3) in the secondary windings of the transformer (T).

REFERENCES:
patent: 4320328 (1982-03-01), Rudolph, Jr.
patent: 4384247 (1983-05-01), Stewart
patent: 4438383 (1984-03-01), Etheridge
patent: 4939441 (1990-07-01), Dhyanchand
H. Illmer, "Die elektrische Austrustung der Triebzuge Baureihe 2300 mit Drehstromantriebstechnik fur die Portugiesische Staatsbahn", Elektrische Bahnen, vol. 90, No. 4, Apr. 1992, Munchen, pp. 130-136.

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