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The paper presents a new speed estimation method for the induction motor. The speed estimator is made possible by a special current control scheme that is based on Integral Sliding Mode (ISM). The traditional method for synchronous d-q current control is to use PI controllers along with a decoupling compensator. Synthesis of the compensation voltages requires knowledge of the speed and motor parameters...
The paper discusses the design of synchronous reference frame current controllers for a sensorless induction motor (IM) drive that operates in speed regulation mode or torque control mode. In most IM implementations, PI controllers alone are used for current regulation because of convenience. The reference values fed in the current controllers are either preselected or are synthesized by flux, speed...
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