Torque determination for control of an induction motor apparatus

Details Torque determination for control of an induction motor apparatus Torque determination for control of an induction motor apparatus

1986-11-03

1991-10-15

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

H02P 540

Patent

active

050577603

ABSTRACT:
An AC induction motor control apparatus includes the determination of the motor torque by one of the use of a torque versus dc input power lookup table for each of selected motor speeds below a predetermined speed and by a mathematical calculation of a plurality of power losses in relation to the dc input power and the inverter frequency for motor speeds above that selected speed.

REFERENCES:
patent: 4091294 (1978-05-01), Zankl et al.
patent: 4158163 (1979-07-01), Eriksen
patent: 4207510 (1980-06-01), Woodbury
patent: 4316132 (1982-02-01), Geppert
patent: 4392100 (1983-07-01), Stanton et al.
patent: 4450398 (1984-05-01), Bose
Andreas, J. C., Energy-Efficient Electric Motors, Decker Inc., 1982, pp. 48-53.
Bose et al, "A High-Performance Pulsewidth Modulator for an Inverter-Fed Drive System Using a Microcomputer", IEEE Transactions on Industry Applications, vol. IA-19, No. 2, Mar./Apr. 1983, pp. 235-243.

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