Method for braking an alternating-current motor

Details Method for braking an alternating-current motor Method for braking an alternating-current motor

1995-03-06

1996-07-02

Ro, Bentsu

Electricity: motive power systems

Induction motor systems

Braking

318804, 318368, H02P 318

Patent

active

055325688

ABSTRACT:
The invention relates to a method for braking an alternating-current motor when the alternating-current motor (1) is supplied by a frequency converter (4) comprising an intermediate circuit (2). In accordance with the invention, when the voltage (uc) of the intermediate circuit (4) reaches a predetermined value during braking, the magnetization of the motor (1) is increased to increase the thermal losses of the motor, and, once the voltage (uc) of the intermediate circuit drops below said predetermined value, the increased magnetization is removed.

REFERENCES:
patent: 4263542 (1981-04-01), Schulze et al.
patent: 4434393 (1984-02-01), Kobari et al.
patent: 5099184 (1992-03-01), Hornung et al.

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