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A New Quick-Response and High-Efficiency Control Strategy of an Induction Motor

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2 Author(s)
Takahashi, I. ; Technological University of Nagaoka, 1603-1 Kamitomioka, Nagaoka, Japan 949-54. ; Noguchi, T.

New quick-response and high-efficiency control of an induction motor, which is quite different from that of the field-oriented control is proposed. The most obvious differences between the two are as follows. 1) The proposed scheme is based on limit cycle control of both flux and torque using optimum PWM output voltage; a switching table is employed for selecting the optimum inverter output voltage vectors so as to attain as fast a torque response, as low an inverter switching frequency, and as low harmonic losses as possible. 2) The efficiency optimization in the steady-state operation is also considered; it can be achieved by controlling the amplitude of the flux in accordance with the torque command. To verify the feasibility of this scheme, experimentation, simulation, and comparison with field-oriented control are carried out. The results prove the excellent characteristics for torque response and efficiency, which confirm the validity of this control scheme.

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Industry Applications, IEEE Transactions on  (Volume:IA-22 ,  Issue: 5 )