利用近场辐射重构电源开关PWM 信号的方法  

Method of Reconstructing Power Switch PWM Signal by Near-field Radiation

作　　者：南瑞亭[1] 唐露新 张智鹰 NAN Ruiting;TANG Luxin;ZHANG Zhiying(Guangzhou Communications Technician Institute,Guangzhou 510540,China;Guangzhou Institute of Science and Technology,Guangzhou 510540,China;Shenzhen Taike Test Co.,Ltd.,Shenzhen 518053,China)

机构地区：[1]广州市交通技师学院,广东广州510540 [2]广州理工学院,广东广州510540 [3]深圳太科检测有限公司,广东深圳518053

出　　处：《现代信息科技》2021年第7期38-40,43,共4页Modern Information Technology

基　　金：广东省科技厅软科学研究领域重点项目(2019B101001017)。

摘　　要：该文针对经过测量封装处理或者绝缘涂层处理后无法直接测量开关电源脉宽调制信号的情况,提出了一种利用磁性元件的近场辐射来重构开关转换器的脉宽调制信号的非接触测试方法。该文研究了降压变换器的辐射模式、磁场传感探头和PWM信号的重构电路。同时,对降压变换器进行重构测试,重构后的PWM信号占空比误差小于0.2%,验证了该方法的有效性。Aiming at the situation that the PWM signal of switching power supply can not be measured directly after measurement packaging or insulation coating treatment,a non-contact test method for reconstructing the PWM signal of switching converter by using the near-field radiation of magnetic components is proposed in this paper.The radiation mode of buck converter,magnetic field sensing probe and reconfiguration circuit of PWM signal are studied.At the same time,the reconstruction test of the buck converter is carried out,and the duty cycle error of the reconstructed PWM signal is less than 0.2%,which verifies the effectiveness of the method.

关 键 词：故障诊断 脉宽调制 开关转换器 近场测量 

分 类 号：TM461[电气工程—电器]