Method and device for magnetic flux estimation in an asynchronou

Details Method and device for magnetic flux estimation in an asynchronou Method and device for magnetic flux estimation in an asynchronou

1991-08-01

1992-12-08

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

318798, G01R 3134, H02P 528

Patent

active

051701162

ABSTRACT:
A method and device are provided for estimating the magnetic induction flux of an asynchronous electric motor, notably for enabling said motor to be controlled by magnetic induction flux regulation, the method consisting of measuring the motor voltage and current, calculating a flux, defining a measured flux, using the operating equations for said motor and employing said measured values and predetermined values for characteristic parameters of said motor, one of which at least, being fixed arbitrarily, may differ considerably from the actual value thereof, and on the basis of said measured flux, calculating a flux defined as the estimated flux and which can be identified with the actual flux through the use of an expression deduced from said motor operating equations as a function of said measured flux, and from characteristic parameters of said motor other than said parameter having a arbitrarily fixed value which may differ considerably from said actual value, and if necessary from said voltage or current measurements.

REFERENCES:
patent: 4245181 (1981-01-01), Plunkett
patent: 4431957 (1984-02-01), Chausse et al.
patent: 4470000 (1984-09-01), Heinle
patent: 4626761 (1986-12-01), Blaschke
patent: 4724373 (1988-02-01), Lipo
patent: 4967135 (1990-10-01), Ashikaga et al.

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