Method and apparatus for increasing AC motor torque output...

Details Method and apparatus for increasing AC motor torque output... Method and apparatus for increasing AC motor torque output...

2007-05-15

2007-05-15

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C318S432000

Reexamination Certificate

active

11375429

ABSTRACT:
Methods and apparatus are provided for controlling AC motor torque output. The method comprises the steps of producing a current based on a first comparison of a fundamental output frequency of the AC motor with a predetermined frequency and a second comparison of a magnitude of a commanded current with a predetermined DC current, and supplying the current to the AC motor.

REFERENCES:
patent: 4085355 (1978-04-01), Fradella
patent: 4132368 (1979-01-01), Schiess et al.
patent: 4240020 (1980-12-01), Okuyama et al.
patent: 4320331 (1982-03-01), Plunkett
patent: 6628096 (2003-09-01), Chen
patent: 7138776 (2006-11-01), Gauthier et al.

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