模块化多电平功率放大器的损耗分析与散热设计  

Loss Analysis and Thermal Design of Modular Multi-level Power Amplifier

作　　者：韩蓉 徐千鸣 陈燕东[1,2] 何志兴 欧阳红林[1,2] 罗安 HAN Rong;XU Qianming;CHEN Yandong;HE Zhixing;OUYANG Honglin;LUO An(Guangdong Zhicheng Champion Group Co.,Ltd,Dongguan 523718,China;National Electric Power Conversion and Control Engineering Technology Research Center,Hunan University,Changsha 410082,China)

机构地区：[1]广东志成冠军集团有限公司,东莞523718 [2]国家电能变换与控制工程技术研究中心(湖南大学),长沙410082

出　　处：《电源学报》2020年第3期95-105,共11页Journal of Power Supply

基　　金：广东省珠江人才计划引进创新创业团队资助项目(2017ZT07G23);国家自然科学基金面上资助项目(51677063)。

摘　　要：开关功率放大器在民用和军事中,如电动振动试验台和电声发射系统等重要领域都有着广泛的应用。首先研究了一种模块化多电平结构的大功率开关功率放大器,介绍了其工作原理,并着重分析了模块化多电平开关功率放大器的热损耗,讨论了其损耗与负载功率大小以及功率因数的关系。然后根据理论分析结果,对模块化多电平开关功率放大器的散热系统进行了设计,并通过热仿真软件PLECS和有限元分析软件ANSYS对所设计的热系统进行了仿真验证。最后研制了30 kW的模块化多电平功率放大器样机,对理论分析和仿真分析结果进行了实验验证。Switching power amplifiers have a wide range of applications in civil and military fields,such as electrical vibration test rigs and electro-acoustic emission systems.In this paper,a high-power switching power amplifier with a modular multi-level structure is studied,together with an introduction of its working principle.In addition,the thermal loss of this amplifier is analyzed in detail,and the relationship between its loss,load power,and power factor is discussed.According to the result of theoretical analysis,the thermal system of the novel amplifier is designed,which is further verified through simulations using software PLECS and finite element analysis software ANSYS.Finally,a 30 kW modular multi-level switching power amplifier prototype was developed to verify the theoretical analysis and simulation results.

关 键 词：开关功率放大器 损耗分析 散热设计 ANSYS 

分 类 号：TM64[电气工程—电力系统及自动化]