天通公司开关电源磁芯选择系统的设计与实现

发布时间：2018-03-16 19:37

本文选题：开关电源　切入点：软磁材料　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：开关电源犹如人体的心脏,是绝大部分电力设备的引擎。软磁磁性元件是所有开关电源中不可或缺的核心器件,它担负着磁能的转化、传递、储存等功能。磁性材料选择及磁芯几何形状的设计差异会改变磁芯的各个参数,进而对装置的性能产生重要影响。本文对目前开关电源磁设计以及磁芯选择所面临的磁性元件端子较多,体积大、重量大、损耗大、谐波高、发热量大等问题进行综合分析,为本课题的展开提供前瞻性和方向性的信息。同时在分析项目可行性和项目需求条件的基础上,提出了开关电源用磁芯选择系统的设计与实现。主要内容为:1、通过对开关电源结构和工作状态的分析研究,在理解不同电源设计对磁芯的不同需求的基础上,以这些需求为导向对软磁新材料特性进行开发设计和改进。从主配方、掺杂、预烧、粉碎、烧结以及其他磁芯制作工艺着手,研究开发适合高性能开关电源用的软磁材料。2、本文根据不同电源装配空间设计及磁路设计的需求,并结合了铁氧体生产制造技术对产品几何形状进行设计改进。为了便于高频电源的小型化、高效化,减小磁器件的高度和体积提高其功率密度,本文又提出了研究平面磁集成的设计方法。3、根据软磁材料损耗数据计算出材料的斯坦梅次系数,并依据斯坦梅次公式计算在不同频率和磁通密度下的磁芯损耗,为整个变压器设计的损耗计算奠定基础。同时根据IEC标准,计算出磁芯的有效参数和不同气隙长度下磁芯的气隙电感系数AL和有效磁导率μe。4、为了简化开关电源设计时,对磁性材料磁导率、损耗、Bs等电磁性能和磁芯的几何尺寸、有效参数等数据的计算和查询工作,完成了软磁铁氧体磁芯选择系统的开发设计。为电源工程师选择磁芯和完成磁设计工作,提供有效的技术支持。
[Abstract]:Switching power supply, like the heart of human body, is the engine of most power equipment. Soft magnetic element is an indispensable core device in all switching power supply, it is responsible for the transformation and transmission of magnetic energy. Storage and other functions. The selection of magnetic materials and the design differences in the geometry of the magnetic core will change the parameters of the core. In this paper, the current magnetic design of switching power supply and the selection of magnetic core are faced with more magnetic element terminals, large volume, large weight, large loss, high harmonic, large heat, and so on. To provide forward-looking and directional information for the development of this project. At the same time, based on the analysis of project feasibility and project requirements, This paper presents the design and implementation of magnetic core selection system for switching power supply. The main content is: 1. By analyzing the structure and working state of switch power supply, we understand the different requirements of different power supply design for magnetic core. Based on these requirements, the characteristics of new soft magnetic materials are developed and improved. Starting with the main formula, doping, pre-firing, crushing, sintering and other core manufacturing processes, The soft magnetic material. 2, which is suitable for high performance switching power supply, is researched and developed. According to the requirements of different power supply assembly space design and magnetic circuit design, In order to make the high frequency power supply miniaturization and high efficiency, reduce the height and volume of the magnetic device and increase its power density. In this paper, the design method of planar magnetic integration is put forward. Based on the loss data of soft magnetic materials, the Stanmez coefficient is calculated, and the core loss at different frequencies and flux densities is calculated according to the Steinmez formula. In order to simplify the design of switching power supply, the effective parameters of magnetic core and the air gap inductance coefficient AL and effective permeability 渭 e.4 of magnetic core under different air gap lengths are calculated according to IEC standard. Calculation and query of magnetic material permeability, loss Bs and other electromagnetic properties, geometric size of magnetic core, effective parameters, etc. The development and design of the soft magnetic ferrite core selection system is completed, which provides effective technical support for the power supply engineer to select the magnetic core and to complete the magnetic design work.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN86;TM27

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