Abstract：A kind of control strategy of optimal flux weakening path is put forward based on depth research on mathematical model of interior permanent magnet synchronous motors (IPMSM). This control strategy is carried out based on the state space of direct axis current (Id) and quadrate axis current (Iq) and boundary curve such as the maximum current curve, the maximum flux curve and the minimum rate of flux and torque. This control strategy aims at the maximum torque range and the minimum wingding current at any motor running speed. The torque control method at any running speed is also put forward to development the motor potential, which would ensure high-speed and high-precision machine. The simulation experiment and prototype experiment are carried out. The experiment result shows that the control strategy can extend IPMSM speed range, and ensure the controllability of torque.
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2011, Vol. 26 
