Induction motor control apparatus

Details Induction motor control apparatus Induction motor control apparatus

1988-02-16

1989-08-29

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 37, 318802, 318811, 364161, H02M 112

Patent

active

048623431

ABSTRACT:
An induction motor vectro control apparatus calculates a slip factor using a secondary time constant. A reference signal is added as noise to the excitation current command signal. The secondary time constant is brought closer to its actual value by modifying the secondary time constant in a direction zeroing the correlation between the motor speed feedback signal and the reference signal.

REFERENCES:
patent: 4377779 (1983-03-01), Plunkett
patent: 4516065 (1985-05-01), Ninomiya et al.
patent: 4602201 (1986-07-01), Edwards
patent: 4615000 (1986-09-01), Fujii et al.
patent: 4628475 (1986-12-01), Azusawa et al.

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