Microprocessor-based efficiency optimization control for an indu

Details Microprocessor-based efficiency optimization control for an indu Microprocessor-based efficiency optimization control for an indu

1982-04-05

1984-05-22

Witkowski, S. J.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318806, H02P 534

Patent

active

044503989

ABSTRACT:
A microcomputer for use with an induction motor drive system processes machine drive system currents, voltages and speed to compute real time machine efficiency. From real time machine efficiency determinations, the microcomputer determines the optimum combination of machine slip frequency and machine air gap flux. The magnitude and frequency of machine stator current are regulated, responsive to the difference in magnitude between optimum machine air gap flux and actual machine air gap flux, and the difference in magnitude between optimum slip frequency and actual slip frequency, respectively, to assure machine steady state operation at maximum efficiency irrespective of machine load conditions.

REFERENCES:
patent: 4088935 (1978-05-01), D'Atre
patent: 4099107 (1978-07-01), Eder
patent: 4207510 (1980-06-01), Woodbury
patent: 4243927 (1981-01-01), D'Atre
patent: 4276505 (1981-06-01), Bose
patent: 4281276 (1981-07-01), Cutler
patent: 4314190 (1982-02-01), Walker
patent: 4330741 (1982-05-01), Nagase

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