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Vol. 132 (2012) No. 5 P 556-565




This paper proposes a new current control method for interior permanent magnet synchronous motor (IPMSM). In the case of AC motor control, two axis current feedback control is performed to control the voltage amplitude and phase. When the inverter voltage is saturated, current control is achieved by controlling the voltage phase. Conventional techniques require switching the mode of the control system from variable-voltage mode to voltage-saturation mode. However, in conventional techniques, the transient voltage saturation occurs by switching the control system.
The proposed method achieves the current control in variable voltage mode and voltage saturation mode without switching the control system. Moreover, the current response is not affected by the rotor speed. The numerical simulation results and experimental results confirm the effectiveness of proposed current control method.

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