基于驱动信号自调整的磁铁电源共模抑制  

Magnet Power Supply With Common-mode Rejection Based on Automatic Calibration of Drive Pulse

作　　者：章勇高 柴成凯 刘鹏 ZHANG Yong-gao;CHAI Cheng-kai;LIU Peng(East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学电气与自动化工程学院,江西南昌330013

出　　处：《电力电子技术》2021年第10期121-124,共4页Power Electronics

基　　金：国家自然科学基金(51467006)。

摘　　要：建立了磁铁电源高频共模等效模型,指出双极性调制理论上可完全消除共模电流。然而,实际产品中开关管驱动脉冲存在相位差,将极大影响其共模消除效果。据此,在此基于共模等效模型进行频域分析,确定共模干扰强度与相位差的理论关系,并以此指导驱动脉冲沿调整,减小共模电流。仿真及实验结果验证了通过驱动信号自调整方法实现磁铁电源共模电流抑制的有效性。The high frequency common-mode equivalent model of magnet power supply is established.It is pointed out that the two phase legs have complementary effect of noise under bipolar modulation.However,due to the phase difference of the driving pulse in the actual product,the common-mode cancellation effect is greatly affected.The frequency domain is analyzed based on the model to determine the relationship between the intensity of common-mode interference and phase difference,which can guide the adjustment of the driving pulse edge,and reduce the commonmode current.Finally,the effectiveness of the proposed method is verified by simulation and experiment.

关 键 词：磁铁电源 双极性调制 共模等效模型 

分 类 号：TN86[电子电信—信息与通信工程]