基于FPGA的同步机轴角编码器  

Synchronizer Axial Angle Encoder based on FPGA

作　　者：张俊霞[1] 佘勇[1] 漆洋 丁晗[1] 刘洁 王鑫 ZHANG Jun-xia;SHE Yong;QI Yang;DING Han;LIU Jie;WANG Xin(College of Electronic Engineering,Chengdu University of Information Technology,Chengdu 610225,China)

机构地区：[1]成都信息工程大学电子工程学院,四川成都610225

出　　处：《成都信息工程大学学报》2018年第3期268-273,共6页Journal of Chengdu University of Information Technology

基　　金：国家自然科学基金资助项目(41475143)

摘　　要：设计了一种基于FPGA的适用于伺服系统的同步机轴角编码器,实现了同步机旋转角度的测量与输出,其通过对旋转变压器输出的两路正交调制信号与激励信号进行混频解调,得出轴相位。首先进行了原理的分析,然后基于FPGA系统实现了AD采样、数字混频、低通滤波、CORDIC解算、数据的串口发送等功能。最后结合旋转变压器,在50 Hz工频载波下进行了测试。结果表明,该轴角编码器测量精度较高、数据更新快、工作稳定。This paper designed a synchronizer axial angle encoder realized the measurement and output of the synchronizer rotative angle based on FPGA,which can beusedin servo system.The encoder obtains the phase by mixing and demodulating the exciting signal and the two orthorhombic modulated signals from the resolver. Firstly,this paper analyzed the theory,and then achieved the functions of AD sample,digital mixing,low-pass filter,CORDIC and serial port based on the FPGA.Finally,conducted tests withthe resolverina Carrier of 50 Hz.The results show that the encoder hashigh measuring precision,high speed of data-updating and stable workingperformance.

关 键 词：同步机 轴角编码器 FPGA CORDIC 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]