Speed controller`s output current limiting method for asynchronous electric motor, involves multiplying corrected stator frequency with constant based on control law to obtain control voltage applied to motor

摘要

The method involves calculating a correction voltage based on a limitation error, if a phase current vector module of an asynchronous motor (M) is greater than a limit value. The voltage is divided by a constant (k) and is subtracted from a stator frequency to obtain a corrected stator frequency. The corrected frequency is multiplied with the constant based on a U/F control law (LC) to obtain a control voltage applied to the motor. An independent claim is also included for a speed controller`s output current limiting system for an electric motor.