中国电机工程学报2025，Vol.45Issue(19)：7670-7682,中插42,14.DOI:10.13334/j.0258-8013.pcsee.242056
考虑多相电机高频振动抑制的三电平H桥变频器中性线电流异常增加问题分析及抑制研究
Analysis and Suppression of Abnormal Increase of Neutral Line Current in Three-level H-Bridge Inverter for High-frequency Vibration Suppression of Multiphase Motor
摘要
Abstract
Carrier phase shifting is one of the most effective methods for high-frequency vibration suppression of multiphase motors.However,there is a problem that the three-level multiphase motor system neutral line current increases abnormally after applying the carrier phase shifting.In this paper,the high-frequency vibration suppression mechanism of the fifteen-phase motor carrier phase shift is revealed by the analytical modeling of motor magnetomotive force.Secondly,combined with the modulation strategy of the inverter,the variation rule of neutral line to ground potential of three-level inverter is clarified.Thirdly,the reason for the abnormal surge in neutral line current caused by carrier phase shifting in multi-phase inverters has been identified,and a method for suppressing neutral line circulation by sequentially shifting the carrier phase of each phase within the inverter channels is proposed.Finally,the simulation model and test platform of three-level fifteen-phase motor system are built,and the neutral line to ground potential variation rule and neutral line current suppression method studied in this paper are simulated and verified by experiments.The results show good agreement between theoretical analysis,simulations,and experimental results,validating the effectiveness of the proposed neutral line current suppression method.The research in this paper can provide a solution for neutral-line current suppression method in three-level multiphase motor systems.关键词
三电平H桥/中性线环流/十五相/载波移相/高频振动抑制Key words
three-levels H-bridge/neutral line circulating current/fifteen-phase/carrier phase shift/high frequency vibration suppression分类
动力与电气工程引用本文复制引用
龙齐杰,胡亮灯,鲁斌,裘呈熠,徐小松,纪博文..考虑多相电机高频振动抑制的三电平H桥变频器中性线电流异常增加问题分析及抑制研究[J].中国电机工程学报,2025,45(19):7670-7682,中插42,14.基金项目
国家自然科学基金项目(51907200) （51907200）
国防基础加强基金(2022-JCJQ-JJ-0537).Project Supported by National Natural Science Foundation of China(51907200) （2022-JCJQ-JJ-0537）
National Defense Strengthening Foundation Plan of China(2022-JCJQ-JJ-0537). （2022-JCJQ-JJ-0537）
