一种基于DSOGI-FLL的具有误差校正能力的转数转换方法应用于永磁同步电机

Shuo Wang;Yuli Bao;Giampaolo Buticchi
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引用次数: 0

摘要

求解器广泛用于电动汽车驱动中的角度和速度检测。解析器由高频激励信号诱导,从正弦和余弦绕组产生与角位置相关的电压信号。由于解析器安装、后处理电路和制造公差的不完善,不可避免地会产生幅值不平衡误差、偏移误差和非正交误差,从而影响解析器到数字转换(RDC)结果的角度精度。为了提高精度和校正分解器误差,提出了自适应滤波器去除直流偏置误差,并提出了一种基于双二阶广义积分器锁频环的RDC方法来解决不平衡幅度误差并实现良好的频率跟踪。最后,采用三阶有理分式多项式近似对角度信号进行重构。由于系统具有错误抑制能力,可以进一步降低RDC的硬件成本。仿真和实验结果表明,该系统具有良好的动态跟踪能力和误差抑制能力。提出的解决方案可以很容易地集成一个“附加”系统到任何基于解析器的永磁同步电机系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A DSOGI-FLL Based Resolver-to-Digital Conversion Method With Error Calibration Capability Used in PMSM
Resolver is widely used for angle and speed detection in electric vehicle drive application. Resolver generates angular position related voltage signals from sine and cosine windings, induced by high-frequency excitation signals. Due to the imperfect resolver installation, postprocessing circuits and manufacturing tolerance, the inevitable amplitude imbalance error, offset error and non-orthogonal error might occur, which influences the angle accuracy from resolver to digital conversion (RDC) results. In order to improve accuracy and calibrate the resolver error, adaptive filter is proposed to remove dc offset errors, and a double second order generalized integrator frequency-locked loop-based RDC method is proposed to solve the imbalance amplitude error and achieve good frequency tracking. At last, third-order rational fraction polynomial approximation are used to reconstruct the angle signals. Since the system has error suppression capabilities, the hardware cost of RDC can be further reduced. Both simulation and experimental results demonstrate the good dynamic tracking capability and error suppression capability. The proposed solution can be easily integrated an “add-on” system to any resolvers-based permanent-magnet synchronous motor system.
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