Inverter control apparatus

Details Inverter control apparatus Inverter control apparatus

1995-06-22

1997-03-25

Cabeca, John W.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318809, 318590, H02D 528

Patent

active

056148038

ABSTRACT:
In order to reduce distortion of a real-current wave form and to suppress substantial transient fluctuation of the current and torque during changeover from a regeneration running condition to the power running condition of a three-phase induction motor, changeover from the three-phase-modulation control to the two-phase-modulation control is carried at the same time the power running condition of the motor is changed to the regeneration running condition according to the motor-state-quantum such as a detected slip ratio, detected torque, detected current or the like. Thus, distortion of the motor-current wave form is reduced and significant fluctuation of the motor-current and torque during the changeover is reduced.

REFERENCES:
patent: 4467262 (1984-08-01), Curtiss
patent: 4641075 (1987-02-01), Asano et al.
patent: 4847743 (1989-07-01), Kamiyama
patent: 4904919 (1990-02-01), McNaughton
patent: 4926104 (1990-05-01), King et al.

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