Adaptive induction motor controller

Details Adaptive induction motor controller Adaptive induction motor controller

1983-12-02

1987-06-02

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318805, 324 51, 324 59, 324158MG, H02P 540, G01R 2700

Patent

active

046706984

ABSTRACT:
A method of measuring induction motor parameters so that the speed and torque control of an induction motor controller may be optimized. While the motor is stopped, a test signal made up of a current pulse of a known amplitude is applied to one or more windings of the motor stator for a selected period of time, after which the current pulse is turned off. After a short delay, the instanteous voltage across the stator windings is measured, and also an integration of the stator voltage is started which continues long enough so that the stator voltage decays to substantially zero. The measured voltage and integrated voltage are respectively proportional to the rotor resistance and the motor magnetizing inductance.

REFERENCES:
patent: 3643156 (1972-02-01), Stewart et al.
patent: 3848186 (1974-11-01), Martyashin et al.
patent: 3947760 (1976-03-01), Noguchi et al.
patent: 4196475 (1980-04-01), Hall
patent: 4442393 (1984-04-01), Abbondanti
patent: 4458196 (1984-07-01), Goyal et al.

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