考虑信号幅值和正交误差的旋转变压器解码算法

李伟伟1，王爽1，程天威1，李光耀2

(1. 上海大学 机电工程与自动化学院，上海200072；

2. 上海电机系统节能工程技术研究中心有限公司，上海200063)

摘要：在传统同步参考坐标系锁相环(SRF-PLL)解码算法的基础上介绍了一种双同步参考坐标系锁相环(DSRF-PLL)解码算法。由于旋转变压器在实际应用中受本体设计及信号处理电路的影响，其输出往往为包含误差的非理想信号，其中幅值不平衡和相位非正交误差占主要地位。DSRF-PLL算法将非理想信号分解成一个正序电压分量和一个负序电压分量，通过双同步坐标系(DSRF)和解耦网络结构单元来达到消除幅值不平衡和相位非正交两种误差的目的。在MATLAB/Simulink环境下搭建仿真模型对DSRF-PLL解码算法进行了仿真验证。仿真结果表明该算法在抑制旋转变压器输出幅值平衡和相位非正交误差方面的有效性。

关键词：旋转变压器； 双同步参考坐标系； 锁相环

基金项目：* 上海张江国家自主创新示范区专项发展资金重点项目(201310-PT-B2-008)

通讯作者：王爽

中图分类号：TM 301文献标志码： A

收稿日期：2015-06-19

A Decoding Algorithm for Resolvers with Amplitude and Quadrature Errors

LIWeiwei1,WANGShuang1,CHENGTianwei1,LIGuangyao2

(1. School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China;

2. Shanghai Engineering Research Center of Motor System Energy Saving Co., Ltd., Shanghai 200063, China)

Abstract：A double synchronous reference frame-based phase-locked loop (DSRF-PLL) decoding algorithm was studied in this thesis based on the traditional synchronous reference frame-based phase-locked loop (SRF-PLL) decoding method. In practical application the output signals of the resolvers were always non-ideal for the influence of the design of the motor structure and the peripheral circuits, among them amplitude error and non-orthogonal error dominate. In DSRF-PLL the non-ideal signals were decomposed by a positive sequence voltage and a negative sequence voltage; The amplitude error and the non-orthogonal error were eliminated by the double synchronous reference frame (DSRF) and the decoupling network unit. The DSRF-PLL decoding algorithm was verified by simulation in the MATLAB/Simulink, and the simulation results showed that the algorithm could achieve expected effect to deal with the amplitude and the orthogonal errors.

Key words： resolver; double synchronous reference frame; phase locked loop

0引言

在高精度现代交流伺服传动系统中，电机转子位置信息的获取是其中一个关键技术。近年来，无位置传感器的控制得到了广泛研究，但其不适合电机需要频繁起动和低速运行的场合。在众多位置传感器中，旋转变压器具有结构可靠、抗干扰能力强、适用于环境恶劣的场合等优点[1]，广泛应用在航空器、卫星天线和机器人中。……