影响松耦合变压器性能参数分析.doc

影响松耦合变压器性能的参数分析 摘　　要 传统的电能传输主要通过导线直接进行，在一般环境下这种方式合理有效，被广泛采用。但是在一些特殊场合，如易燃易爆场合和水下系统，这种电能传输方式的安全性难以得到保证。非接触电能传输系统利用电磁感应耦合技术与电力电子技术，避免了电能传输过程中裸露导体或产生电火花的问题，实现了电能的安全传输。 松耦合变压器是非接触电能传输系统中的关键部分。在简单地介绍松耦合变压器的基本结构及工作原理的基础上，给出了松耦合变压器的互感等效模型。由松耦合变压器的特点，对影响松耦合变压器耦合系数的磁芯材料、绕组位置、气隙大小等因素进行了分析。针对不同的应用场合，对原副边进行了补偿设计，提高了电能传输效率和减小了供电电源的电压电流定额。 关键词：非接触能量传输；松耦合变压器；耦合系数；原副边补偿 The analysis of the parameters for affecting the loosely coupled transformer performance ABSTRACT Most electrical equipment get the energy through plugs from source, this kind of energy transmission system is efficient and accepted widely. But it is unsafe at the special circumstance such as undersea applications and flammable environments. This paper describes a contact less power transmission system using isolation transformer, which is spark free and no uncovered conduct being exposed to the environments. Loosely coupled transformer is a key part in contact less in ductile power transfer system. For this reason, the fundamental structure and work principle of the loosely coupled transformer are introduced, and the circuit model of mutual inductance is established. Factors that affect the coupling coefficients of the loosely coupled transformer are studied, including magnetic material, location of windings and the width of air gap. Due to the leakage inductances, compensation is necessary to achieve the required power transfer capability. The level of compensation and compensation to apologies are discussed. The design proposal for main parameters of the loosely coupled transformer is suggested. Key words: inductive power transfer; loosely coupled transformer ; coupling coefficient; primary and secondary compensation 1　　绪论 从1840年发现利用电磁感应原理和导线可以传输电能至今，电能的传输主要通过导线直接进行，但是这种传统的电能传输方式存在很多弊端，例如，水下工作系统、化工、矿业、石油领域等，在传统的电能传输过程中，由于导线的裸露，故存在摩擦、磨损、漏电、火花等不安全因素，极易引起短路或者爆炸；移动设备如电车采用的是滑动接触，在其充电时会存在滑动磨损、积碳、导体裸露和接触火花等问题[1-5]。因此，传统的接触式电能能传输系统已经不能满足现实生活及生产的需要，新型的电能传输技术急需产生。 非接触电能传输系统应用电磁感应耦合技术、现代电力电子能量变换等新技术，通过存有较大气隙的松耦合变压器将电能从电源