Apparatus for controlling AC motor

Details Apparatus for controlling AC motor Apparatus for controlling AC motor

1983-01-14

1984-05-29

Rubinson, Gene Z.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318802, 318799, 363 37, H02P 540

Patent

active

044517718

ABSTRACT:
Disclosed is a control apparatus for an AC motor which is driven by a power converter constituted by switching elements. A current control circuit turns on/off the switching elements in accordance with a current pattern signal in the form of an AC signal to thereby control the motor current. The current pattern signal is obtained by a current pattern calculating circuit based on a current command signal and a sinusoidal signal which determines the current phase. A current correction signal proportional to the deviation of the motor current from the current command signal is obtained by a current correction control circuit and added to the current command signal to be applied to the current pattern calculating circuit.

REFERENCES:
patent: 3824437 (1974-07-01), Blaschke
patent: 4125796 (1978-11-01), Nagase et al.
patent: 4310791 (1982-01-01), Akamatsu
patent: 4314190 (1982-02-01), Walker et al.
patent: 4320331 (1982-03-01), Plunkett
patent: 4327315 (1982-04-01), Kawada et al.
patent: 4330741 (1982-05-01), Nagase et al.
patent: 4344025 (1982-08-01), Okuyama et al.
patent: 4358726 (1982-11-01), Iwakane et al.
patent: 4388577 (1983-06-01), Blaschke et al.

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