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Self-decoupling control of high performance induction motor drive

This study proposes a self-decoupling method for indirect field-oriented control of induction motor drives. The method presents an on-line slip gain estimation algorithm to overcome the parameters' variation effect when computing the slip speed. The slip gain estimation uses short duration pulses added to the constant flux current. Based on the resultant torque command produced by the speed controller, the slip gain is properly adjusted. Simulations firstly verify the proposed estimation method. Also, a prototype DSP-based experimental system is built to demonstrate the feasibility of the proposed method.