一种适用于GaN基电机驱动器的新型死区自适应控制方法  

A Novel Dead-time Adaptive Control Method for GaN-based Motor Drive

作　　者：秦海鸿[1] 汪文璐 谢斯璇 彭江锦 陈文明[1] QIN Haihong;WANG Wenlu;XIE Sixuan;PENG Jiangjin;CHEN Wenming(College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,Jiangsu Province,China)

机构地区：[1]南京航空航天大学自动化学院,江苏省南京市211106

出　　处：《中国电机工程学报》2023年第11期4422-4433,共12页Proceedings of the CSEE

基　　金：南京电子器件研究所宽禁带半导体电力电子器件国家重点实验室开放基金(2019KF001);国家自然科学基金项目(51677089)。

摘　　要：设置死区时间是为了防止桥臂电路上下管直通问题,保证电机驱动器的可靠性。氮化镓(gallium nitride,GaN)基电机驱动器对死区设置较为敏感,死区时间过长会导致GaN器件反向导通损耗过高及电机驱动器输出波形畸变,过短则会造成输出电容损耗及高电流尖峰。该文对第一及第二死区时间的影响进行分类讨论,分析得出两种死区时间的优化原则,并基于此提出一种新型死区自适应控制方法。这种方法无需添加额外硬件电路,可以在消除输出电容损耗及电流尖峰的同时减小反向导通损耗,提高效率,并有效降低电机驱动器负载电流的总谐波失真,提高电机运行稳定性。仿真和实验验证新型死区自适应控制方法的有效性,且其在重载及高开关频率状态下较传统死区设置方法具有明显优势。Dead-time is set to avoid the shoot-through problem of bridge-arm circuits and ensure the reliability of motor drives.Gallium nitride(GaN)based motor drive is sensitive to dead-time setting.Too long dead-time will lead to high reverse conduction loss of GaN device and distortion of motor drive output waveform,and too short dead-time will lead to output capacitance loss and high current spike.In this paper,the effects of the first dead-time and the second dead-time are classified and discussed.The optimization principles of two different dead-time are revealed;based on this,a novel dead-time adaptive control method is proposed.The method can eliminate output capacitance loss and current peak,reduce reverse conduction loss,improve efficiency,effectively reduce total harmonic distortion of load current of motor drive,and improve operation stability of motor without adding additional hardware circuit.Simulation and experiments verify the effectiveness of the novel dead-time adaptive control method,which has obvious advantages over the traditional dead-time design method under heavy load and high switching frequency.

关 键 词：CoolGaN HEMT 死区优化 自适应控制 效率 谐波抑制 

分 类 号：TM131.2[电气工程—电工理论与新技术]