【摘要】 针对永磁同步电机(PMSM)电感参数辨识方法收敛速度慢、算法鲁棒性差等问题,本文提出一种基于双脉冲高频方波电压注入策略的在线电感辨识方法。该方法首先建立永磁同步电机电感各向异性数学模型,然后在估计d和估计q轴上依次注入两对高频方波电压脉冲,计算估计d、q轴上电流增量,通过少量计算即可在线辨识d、q轴电感。同时还可以根据电流响应估计转子位置,并利用估计位置误差,进一步获得交叉饱和电感。实验结果表明,所提方法可在4个脉冲宽度调制(PWM)周期内完成一次d、q轴电感和交叉饱和电感测量,收敛速度快、精度高、通用性强、计算量小、易于工程实现。更多还原

【Abstract】 Aiming at the problems of the conventional inductances identification methods of permanent magnet synchronous motors(PMSM), such as slow convergence speed, weak robustness, this paper proposes a novel method for the online inductances identification using a dual-pulse high-frequency square-wave voltage injection strategy. The method first establishes a mathematical model of the PMSMs in an inductance anisotropy coordinate, sequentially injects two square-wave voltage pulses along the estimatedd-andq-axis, then calculates the current differences on the estimateddqaxes. And thed-andq-axis inductances can be identified online with a small amount of calculations. At the same time, the rotor position is also estimated based on the current responses, and the position estimation error can be used to further obtain the cross-saturated inductances. The experimental results show that the proposed method can identifiy thed-andq-axis incremental inductances and cross-saturation incremental inductances during only four pulse width modulation(PWM) cycles, and has merits such as the fast convergence speed,high accuracy, strong commonality, small calculation amount, and convenient implementation.更多还原