【作者】 张宏宇；

【导师】 王淑娟；

【作者基本信息】 哈尔滨工业大学 ， 电气工程（专业学位）， 2020， 硕士

【摘要】 固态功率控制器(Solid-state power controlle,SSPC)集继电器转换功能和断路器保护功能于一体,具有体积小、响应快和无分断电弧等优点,是多电化和全电化飞行器配电系统的核心。相比于传统Si MOSFET,Si C MOSFET具有高击穿场强和高工作温度等优点,在固态功率控制器中具有很好的应用前景。目前,多通道Si C固态功率控制器主要面临电热特性分析不准确、并联使用时多通道电流分布不均衡等问题,导致固态功率控制器工作性能不稳定,无法满足实际应用需求。本文以多通道Si C固态功率控制器为研究对象,研究其功率模块热仿真分析、多通道电热特性分析、多通道并联均流设计等内容,为国产高性能多通道Si C固态功率控制器提供技术支持。首先,建立Si C MOSFET功率模块热仿真模型,实现功率模块温度特性的准确计算,为固态功率控制器电热特性分析奠定基础。基于热路理论建立Si C MOSFET功率模块热路模型,分析MOSFET稳态工作温度以及开通过程中的瞬态温升;建立Si C MOSFET功率模块有限元仿真模型,仿真分析功率模块稳态温度场分布及开关过程暂态温度变化曲线,并通过实测验证仿真结果的准确性。其次,建立多通道Si C固态功率控制器电热仿真模型,实现其多通道电热特性的准确分析。建立固态功率控制器单通道电特性仿真模型,并分析不同载荷条件固态功率控制器的开关特性,验证单通道模型的正确性;采用等效法建立固态功率控制器多通道电特性仿真模型,并分析通道阻抗变化对各通道电流的影响;建立固态功率控制器多通道热仿真模型,进行整机稳态和瞬态温度场的仿真分析。然后,提出固态功率控制器多通道并联均流设计方法,提高固态功率控制器各通道电流的一致性。考虑寄生参数影响,优化固态功率控制器布局,提高了固态功率控制器的多通道电流一致性;采用田口稳健设计方法对固态功率控制器进行多通道并联均流设计,进一步提高各通道电流的一致性。最后,搭建多通道Si C固态功率控制器样机测试平台,验证并联均流设计的有效性。完成多通道Si C固态功率控制器的软硬件设计,进行多通道Si C固态功率控制器电流分布测试,验证并联均流设计效果。更多还原

【Abstract】 Solid-state power controller(Solid-state power controlle,SSPC)integrates the conversion function of the relay and the circuit protection function of the circuit breaker.It has the advantages of small size,fast response and non-breaking arc.It is a multi-electric and fully-electric aircraft configuration.The core of the electrical system.Compared with traditional Si MOSFETs,Si C MOSFETs have the advantages of high breakdown field strength and high operating temperature,and have good application prospects in solid-state power controllers.At present,multi-channel Si C solid-state power controllers mainly face problems such as inaccurate analysis of electrothermal characteristics and unbalanced multi-channel current distribution,resulting in unstable performance of solid-state power controllers,which cannot meet actual application requirements.Therefore,this article takes the multi-channel Si C solid-state power controller as the research object,and researches its temperature field simulation analysis,multi-channel electrothermal characteristic analysis,multi-channel parallel current sharing and other content,etc.,to provide domestic high-performance multi-channel Si C solid-state power controller Technical Support.First,the simulation model of Si C MOSFET power module is established to achieve accurate analysis of Si C chip temperature.Based on the thermal circuit theory,the thermal circuit model of the Si C MOSFET power module is established,and the steady-state operating temperature of the MOSFET and the transient temperature rise during the pass-through process are analyzed;The temperature field distribution and the transient temperature change curve of the switching process,and the accuracy of the simulation result is verified by actual measurement.Secondly,the electric heating simulation model of the multi-channel Si C solid-state power controller is established to realize the accurate analysis of the electric-heat characteristics of the multi-channel Si C solid-state power controller.The circuit simulation model of multi-channel solid-state power controller is established to analyze the switching characteristics of SSPC under different load conditions;the thermal simulation model of multi-channel solid-state power controller is established to perform steady-state temperature field simulation and transient temperature field simulation analysis of the whole machine.Then,a multi-channel parallel current sharing design method of solid-state power controller is proposed to achieve uniform current distribution of the multi-channel solid-state power controller.Analyze the influence of parasitic parameters on the switching characteristics of solid-state power controller,optimize the layout of solid-state power controllers,and reduce the influence of parasitic parameters on the switching characteristics of solid-state power controllers;adopt Taguchi’s robust design method to perform multi-channel parallel current sharing on solid-state power controllers.Design to improve the consistency of the multi-channel current distribution of solid-state power controller.Finally,a multi-channel Si C solid-state power controller prototype test platform was built to verify the effectiveness of the parallel current sharing design.Design a prototype multi-channel Si C solid-state power controller,detail the hardware circuit design and software solution of the solid-state power controller,test the current distribution of the multi-channel Sic solid-state power controller,and verify the effect of parallel current sharing.更多还原