Excitation commanding for current fed motor drives

Details Excitation commanding for current fed motor drives Excitation commanding for current fed motor drives

1978-10-02

1980-07-29

Rubinson, Gene Z.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318808, H02P 540

Patent

active

042153050

ABSTRACT:
An a-c electric induction motor control system having apparatus for balancing motor air-gap flux against motor stator current in a manner to derive a motor excitation command signal which tends to cause the control system to force the motor to operate on a predetermined torque versus slip frequency characteristic. The motor excitation command signal is utilized to regulate the magnitude of excitation supplied to the motor such that the air-gap flux level assumes a predetermined magnitude as a function of the motor slip frequency. Above motor corner point velocity, the balancing is modified in favor of flux such that the motor is operated in a constant horsepower mode.

REFERENCES:
patent: 3500158 (1970-03-01), Landau et al.
patent: 4044285 (1977-08-01), Plunkett et al.
patent: 4047083 (1977-09-01), Plunkett
patent: 4088934 (1978-05-01), D'Atre et al.

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