Start-up control for an induction motor drive

Details Start-up control for an induction motor drive Start-up control for an induction motor drive

1984-07-02

1985-09-03

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318713, H02P 130

Patent

active

045395144

ABSTRACT:
A method of starting an AC motor from any initial speed using open loop control is provided. Sufficient current is provided to the motor so that motor flux can be developed. The frequency provided to the AC motor is varied and the stator frequency at which the motor peak flux occurs is determined. A transition to a control responsive to an external command at approximately the stator frequency at which the peak flux occurred is made.

REFERENCES:
patent: 4012679 (1977-03-01), Matsuda et al.
patent: 4399395 (1983-08-01), Espelage
patent: 4409533 (1983-10-01), Fawabata
patent: 4426611 (1984-01-01), Espelage et al.
patent: 4443747 (1984-04-01), Chausse et al.
patent: 4449087 (1984-05-01), Lippitt et al.
patent: 4451112 (1984-05-01), Hattori et al.

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