【摘要】 表贴式永磁同步电机无位置传感器控制通常使用正交锁相环提取反电动势相位信息从而实现电机转子位置估计。然而，传统正交锁相环在电机反转时会有180°的收敛偏差，且加减速时会有明显的角度估计误差。针对这两个问题，本文提出了一种具有极性校正及高精度角度前馈补偿的增强型正交锁相环。首先，基于两相静止坐标系设计了改进型鉴相器，通过改进型鉴相器的误差分量设计了极性校正函数，以实现电机正、反转时的角度无偏差收敛估计。此外，在引用改进型鉴相器的误差分量作为前馈补偿信号的基础上，采用增强型降阶广义积分器对其进行滤波，以实现低延迟、低噪声的角度误差补偿。最后，在电机平台上对所提方案进行了实验验证，并与现有方案进行了对比。实验结果表明：所提方案实现了极性校正及角度误差理论消除，相较于现有角度前馈补偿方案，噪声均方差最多降低23.98%。更多还原

【Abstract】 The sensorless control of surface-mounted permanent magnet synchronous motor(SPMSM) usually uses quadrature phase-locked loop(QPLL) to extract the phase information of the back electromotive force to realize the rotor angle estimation. However, the traditional QPLL has a convergence deviation of 180° when the motor is reversed, and the angle estimation error is obvious when the motor is accelerated and decelerated. To solve these problems, an enhanced QPLL(EQPLL) with polarity correction and high precision angle feedforward compensation is proposed. Firstly, the traditional phase discriminator is improved based on the two-phase stationary coordinate system, and the polarity correction function is designed by the error component of the improved phase discriminator to realize the nonconvergent deviation angle estimation under the forward and reverse switching conditions of the motor. In addition, the error component of the improved phase discriminator is used as the feedforward compensation signal, and the enhanced generalized integrator is used to filter it, so as to realize the angle error compensation with low delay and low noise. Finally, the proposed scheme is verified by experiment on the motor platform, and compared with the existing scheme. The experimental results show that the proposed scheme can realize the polarity correction and angle error elimination, and at the same time, the noise mean square error is reduced by 24.33% compared with the existing angle feedforward compensation scheme.更多还原