Abstract：Considering the fact that single current weakening control methods cannot guarantee optimum motor efficiency in high-speed field-weakening control of interior permanent magnet synchronous motors (IPMSM),this paper proposes a novel weakening control method based on gradient descent by using single current regulator.On the basis of single current control,this online method automatically optimizes the corrected q-axis voltage by comparing the current gradient descent direction and the constant torque direction of the load and speed respectively,so that the current reaches the minimum to improve operational efficiency.It is also proved that the optimal result of this problem is unique and optimal.Finally,the motor simulation and experiment platforms based on Simulink and dSPACE are set up to demonstrate the superiority of this method compared with traditional weakening control methods.The results show that the proposed method can improve the efficiency of the permanent magnet synchronous motor in the high speed region,which provides an effective way for the efficient operation of the system.
李珂, 顾欣, 刘旭东, 张承慧. 基于梯度下降法的永磁同步电机单电流弱磁优化控制[J]. 电工技术学报, 2016, 31(15): 8-15.
Li Ke, Gu Xin, Liu Xudong, Zhang Chenghui. Optimized Flux Weakening Control of IPMSM Based on Gradient Descent Method with Single Current Regulator. Transactions of China Electrotechnical Society, 2016, 31(15): 8-15.
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2016, Vol. 31 
