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Comparative Study of PMSM Drive Systems Based on Current Control and Direct Torque Control in Flux-Weakening Control Region

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3 Author(s)
Inoue, Y. ; Grad. Sch. of Eng., Osaka Prefecture Univ., Sakai, Japan ; Morimoto, S. ; Sanada, M.

This paper examines the control performance of permanent-magnet synchronous motor drive systems based on current control and direct torque control (DTC) when flux-weakening control is applied. The control law in the M-T frame, which is used in the DTC, requires only armature resistance, whereas the control law in the d-q frame, which is used in current control, requires many motor parameters for flux-weakening control. The experimental results clarify the influence of parameter variation on the control characteristics of flux weakening and torque limiting. The DTC-based motor drive system combined with the control laws in the M-T frame has several advantages, including insensitivity to parameter variation, simplicity of calculation, and stable control.

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Industry Applications, IEEE Transactions on  (Volume:48 ,  Issue: 6 )