Steuervorrichtung für einen Asynchronmotor

摘要

An error current component which becomes zero when an actual value of a primary flux coincides with a set value inducted by a product of a exciting current command and a primary self-inductance by detecting a primary current of an inductance motor(1), is inducted by an error current component processing circuit(6). A primary resistance compensation circuit(9) processes a compensation amount of a primary resistance compensation amount. And a compensation voltage processing circuit(7) processes a compensation voltage which directs the error current component to zero. A rotating speed of the induction motor(1) can be controlled in a stable state even though a value of primary resistance of the induction motor(1) is varied by temperature. Further, torque inadequate and excess current can be avoided.