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Maximum torque control of stator-flux-oriented induction machine drive in the field-weakening region

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3 Author(s)
Myoung-Ho Shin ; Dept. of Electr. Eng., Hanyang Univ., Seoul, South Korea ; Dong-seok Hyun ; Soon-Bong Cho

In a conventional stator-flux-oriented (SFO) induction machine drive system, the field-weakening method is used to vary the stator-flux reference in proportion to the inverse of the rotor speed. This paper investigates why the maximum torque capability cannot be obtained in a conventional SFO system. This paper proposes a new selection method of flux reference to obtain maximum torque capability in the field-weakening region by considering voltage, torque, and current limits. The proposed method is verified by simulation and experiment with a 5 hp induction motor drive

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Industry Applications, IEEE Transactions on  (Volume:38 ,  Issue: 1 )