Control unit for induction motor and control method therefor

Details Control unit for induction motor and control method therefor Control unit for induction motor and control method therefor

1995-06-27

1997-05-13

Cabeca, John W.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318808, H02P 5408

Patent

active

056295979

ABSTRACT:
A control unit for an induction motor which detects a primary current in an induction motor, obtains an error current which becomes zero when an actual value of the primary magnetic flux coincides with a set value provided as a product of I.sub.1d * and a primary self inductance L.sub.1, executes correction of the primary resistance, primary self-inductance, and leak factor according to the error current. Furthermore, the control unit has a correcting section control circuit in which a set error most influential for effecting coincidence between the primary magnetic flux in the induction motor with the primary magnetic flux is preferentially corrected.

REFERENCES:
patent: 4019131 (1977-04-01), Yamada
patent: 4767976 (1988-08-01), Mutoh et al.
patent: 4780658 (1988-10-01), Koyama
patent: 4843296 (1989-06-01), Tanaka
patent: 5475293 (1995-12-01), Sakai et al.
J. Fetz, "Parameter Adaptation For a Field Oriented Induction Machine Fed by a PWM-Inverter and Determination of the Fundamental Currents in the Range of Overmodulation", Firenze, vol. 2, pp. 138-144 (1991).
R. Weinman, "Maschinenparameter-Einstellung und Deren Adaption Bei Einem Asynchronmaschinenantrieb Mit Spannungszwischenkreisumrichter", (1991), issues No. 3, 4, pp. 72-94.

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