Induction motor controller

Details Induction motor controller Induction motor controller

1982-09-07

1984-11-20

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318808, 318809, 318812, H02P 540

Patent

active

044841264

ABSTRACT:
The present invention generates a motor slip frequency value and two current magnitude values representing quadrature components of the motor stator current to be generated. Closed-loop control of the motor operation is provided by feeding back a signal representative of the motor shaft speed or position calculate the torque required from the motor. The feedback signal is separated into high and low frequency components. Additional circuitry changes the value in response to detected variations in the high frequency components of the feedback signal. The addition of this circuitry causes the motor control circuit to no longer represent the inverse of the motor transfer function network.

REFERENCES:
patent: 4310791 (1982-01-01), Akamatsu
patent: 4361794 (1982-11-01), Kawada

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