王相雯　汝玉星　吴戈　林世坤　田小建　蔡振龙

摘 要：目前电动汽车充电方式多通过有线充电方式，极其限制电动汽车的普及。而无线充电技术多以电路较简单的较成熟的感应式无线充电技术为主，电磁感应的磁场发散性较强，对距离及放电受电线圈要求位置要求较高。现电动汽车充电装置的磁耦合共振无线传输系统多针对固定汽车型号。本文主要研究通过接收次级回路的参数，从而控制主回路电容调制，以自动谐振的磁耦合共振无线传输系统来实现对不同接收回路的充电，从而满足对不同型号电动汽车的充电兼容。

关键词：磁耦合共振 无线充电 自动谐振

Automatic Resonance Electric Vehicle Wireless Charging Device

Wang Xiangwen，Ru Yuxing，Wu Ge，Lin Shikun，Tian Xiaojian，Cai Zhenlong

Abstract：At present， most electric vehicle charging methods are wired charging methods， which extremely restricts the popularization of electric vehicles. The wireless charging technology is mostly based on the more mature inductive wireless charging technology with simpler circuits. The magnetic field of electromagnetic induction has strong divergence， and it has higher requirements on the distance and the position of the discharge power receiving coil. The current magnetic coupling resonance wireless transmission system of electric vehicle charging devices is mostly aimed at fixed vehicle models. This paper mainly studies the control of the capacitance modulation of the main circuit by receiving the parameters of the secondary circuit， and the automatic resonance magnetic coupling resonance wireless transmission system to realize the charging of different receiving circuits， so as to meet the charging compatibility of different types of electric vehicles.

Key words：magnetic coupling resonance， wireless charging， automatic resonance

1 引言

传统能源不仅对环境污染有较大影响，亦面临着能源枯竭危机。汽车已成为现当代普遍的代步工具，随着人们的环保意识增强，对汽车的能源驱动替代亦逐渐形成趋势[1]。新能源汽车的充电问题成为电动汽车发展的瓶颈。据Strategy Analytics统计，2019年全球无线充电市场规模为86亿元，其中汽车占比为29%，在应用前景的占比上仅次于消费电子。但现今较为成熟的接触式无线充电技术，亦存在许多问题即由于电磁感应原理限制了被充电物与充电物的距离与相对位置，为无线充电带来许多不便。现磁耦合共振的方式由于更安全的免触电特点，更长的传输方式，更灵活的相对位置等优点被广泛关注[2-3]，但在电动汽车的无线充电应用方面仍存在由于接受回路参数对发射回路谐振充电系统难以满足不同厂家型号汽车的问题。……