Open loop motor control with both voltage and current regulation

Details Open loop motor control with both voltage and current regulation Open loop motor control with both voltage and current regulation

1990-04-03

1992-08-18

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

H02P 540

Patent

active

051402483

ABSTRACT:
An open-loop pulse width modulation (PWM) motor control for an induction motor includes a voltage regulator loop which is wrapped around a current regulator. When a load is suddenly encountered by the motor, voltage drops at the output of the current regulator. This is sensed and fed back to a voltage regulator and to a current limiter which then adjust the input signal to the current regulator to prevent an overcurrent that will trip a circuit protection device. The voltage regulator and current limiter may be implemented in either analog or digital circuitry.

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