基于DSP的振镜电机数模混合驱动电路设计  

Design of Digital-analog Hybrid Drive Circuit for Galvanometer Motor Based on DSP

作　　者：黄磊 杜思勋[2] 林晓刚 解伟 HUANG Lei;DU Si-xun;LIN Xiao-gang;XIE Wei(Fuzhou University,Fuzhou 350108,China;不详)

机构地区：[1]福州大学,电气工程与自动化学院,福建福州350108 [2]中国科学院海西研究院,泉州装备制造中心,福建泉州362216

出　　处：《电力电子技术》2025年第1期13-16,共4页Power Electronics

基　　金：省科技计划-自然基金青年创新项目(2021J05-105);泉州科技计划-高层次人才创新创业项目(2021C025R)。

摘　　要：振镜作为高端激光装备不可或缺的一环,其中振镜电机驱动电路对于电机快速精确的摆动起着至关重要的作用。目前国内大多品牌的振镜依旧采用纯模拟式的振镜电机驱动电路架构,相较于数模混合驱动电路,其工作带宽低,控制精度易受温度影响。设计了一种基于数字信号处理器(DSP)的振镜电机数模混合驱动电路,该电路首先采用两片高精度的模数转换芯片,分别设计电流采样电路和位置采样电路,将电流和位置信号转换为数字信号传输到DSP处理,然后利用高精度数模转换芯片输出电压控制信号,最后经线性功率放大器调理输出为电机电压控制信号。其中,电流和位置采样的精度达到1 mA和1μrad,输出控制信号的精度为1 mV。经自主搭建实验平台测试,验证了该驱动电路能够在保证控制精度的同时,提高振镜电机系统的工作带宽。As an indispensable part of high-end laser equipment,the galvanometer motor drive circuit plays a vital role in the fast and accurate oscillation of the motor.At present,most of the galvanometer brands in China still use a pure analog galvanometer motor drive circuit architecture,which has low operating bandwidth compared to the digital-analog hybrid drive circuit,and the control accuracy is easily affected by temperature.A digital-analog hybrid drive circuit of galvanometer motor based on digital signal processor(DSP)is designed.Firstly,two high-precision analog-to-digital conversion chips are used to design the current sampling circuit and the position sampling circuit.The current and position signals are converted into digital signals and transmitted to DSP for processing,and then the voltage con-trol signals are output by high-precision digital-to-analog conversion chip,and finally the voltage control signals are output by linear power amplifier.Where,the accuracy of current and position sampling reaches 1 mA and 1μrad,the accuracy of output control signal is 1 mV.The test of the independent experimental platform proves that the drive cir-cuit can improve the working bandwidth of the galvanometer motor system while ensuring the control accuracy.

关 键 词：振镜电机 数模混合驱动电路 数字信号处理器 

分 类 号：TM351[电气工程—电机]