Flyback开关电源近场磁辐射预测与抑制  

Magnetic near field predication and suppression of a Flyback SMPS

作　　者：张晓光[1] 和军平[2] 孙力[1] 王毅[2] 

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,黑龙江哈尔滨150001 [2]哈尔滨工业大学深圳研究生院,广东深圳518055

出　　处：《电机与控制学报》2010年第10期21-25,31,共6页Electric Machines and Control

基　　金：国家自然科学基金(50877015);高等学校博士点基金新教师项目(200802131017)

摘　　要：为了研究Flyback开关电源主电路产生的磁场辐射的分布和特性,提出了一种时域计算开关电源磁场辐射对敏感回路造成的感应电压的简便方法,通过建立Flyback电源的高频电路仿真模型,分析了主电路寄生电感、电容形成的谐振及其对磁场辐射的作用。推导了敏感回路磁感应电压的简化预测算法,并对磁场分布进行了分析。最后提出了金属平面镜像抵消、主电路寄生参数控制等改善措施。仿真与实验结果验证了所提预测方法的正确性与有效性。In order to study the distribution and characteristics of magnetic radiation around a Flyback power supply,an easy induced voltage calculation method of near field magnetic radiation is proposed.After building up a high frequency circuit simulation model,resonant phenomenon among parasitic inductors and capacitors in main circuit and its impaction on magnetic radiation were analyzed and verified by experiment.The simple induced voltage calculation method of near field magnetic radiation was deduced.Several magnetic radiation control methods,such as metal ground mirror plane,shielding method,were proposed.The validity and correctness of the novel are verified by simulation and experiment results.

关 键 词：开关电源 磁场分析 辐射预测 辐射抑制 

分 类 号：TM921.5[电气工程—电力电子与电力传动]