Peak-torque-per-ampere (PTPA) control method for an induction mo

Details Peak-torque-per-ampere (PTPA) control method for an induction mo Peak-torque-per-ampere (PTPA) control method for an induction mo

1994-04-08

1996-03-12

Sircus, Brian

Electricity: motive power systems

Induction motor systems

Primary circuit control

318809, H02P 540

Patent

active

054989450

ABSTRACT:
In a field-oriented control method and apparatus for an induction motor, a desired quadrature-axis current i.sub.q * and a desired direct-axis current i.sub.d * are chosen. The desired quadrature-axis current i.sub.q * and desired direct-axis current i.sub.d * are related such that peak torque is produced by the motor per ampere of electric current flowing in the motor. The peak-torque-per-ampere condition implies that the motor is operating at high efficiency.
Also, in a field oriented control method and apparatus for an induction motor, a desired quadrature-axis current i.sub.q * and a desired rotor flux .lambda..sub.r * are chosen. The desired quadrature-axis current i.sub.q * and desired rotor flux .lambda..sub.r * are related such that peak torque is produced by the motor per ampere of electric current flowing in the motor.

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