移动终端的多模式快速充电技术和无线充电技术研究

发布时间：2018-05-10 23:15

本文选题：AC-DC + PWM调制　；参考：《浙江大学》2016年硕士论文

【摘要】：当前,各种移动终端如手机、平板电脑等的应用日趋普及,成为人们生活的必需品。然而受限于有限的电池续航时间,如何为其快速高效方便地充电成为业界关注的热点问题。有鉴于此,论文开展了移动终端的有线快速充电和无线充电方案的研究,采用了基于恒流\恒压的多模式高效快速充电和无线充电方式来解决移动终端的充电速度慢、充电时间长问题,改善充电的便捷性。论文的主要内容包括：1、在移动终端的有线充电技术中采用AC-DC开关电源给移动终端充电,开关电源采用反激式变换器,控制方案选择电流反馈PWM调制,变换器工作在恒流\恒压模式,提高了充电的速度和效率,改善了响应性能。设计的多模式控制使得变换器能够在低的工作电流下达到高的效率,变换器的工作电流可以低至2.5mA。控制芯片基于CSMC 1μm 40V工艺设计,芯片的测试结果验证了本文设计的开关电源实现了对移动终端的快速充电。2、针对实现无线充电的一个技术关键——如何保持系统全过程保持在最佳工作状态,论文提出一种新结构的逆E类功率放大器予以解决。当逆E类功率放大器的MOSFET满足零开关电流导通(Zero Current Switching)和零开关电流导数导通(Zero Current Derivation Switching)条件时,可保持在最佳状态工作。并提出了相应的闭环控制技术,将输出负载视为自变量,当负载变化时,通过调节MOSFET的控制电压的占空比和频率,可实现放大器工作在最佳状态。控制电路使用SMIC 0.18μm 3.3V的工艺进行设计,仿真结果显示,当输出负载在20%范围内变化时,逆E类功率放大器始终工作在最佳状态。
[Abstract]:At present, various mobile terminals such as mobile phones, tablets and other applications are becoming increasingly popular, become a necessity of life. However, due to the limited battery life, how to charge it quickly, efficiently and conveniently has become a hot issue in the industry. In view of this, the paper develops the research of wired fast charging and wireless charging scheme of mobile terminal, and adopts multi-mode and high-efficiency fast charging and wireless charging method based on constant current and constant voltage to solve the problem of slow charging speed of mobile terminal. Long charge time problem, improve the convenience of charging. The main contents of this paper include: 1, in the wired charging technology of mobile terminal, the AC-DC switching power supply is used to charge the mobile terminal, the switching power supply adopts flyback converter, and the control scheme selects current feedback PWM modulation. The converter works in constant current / constant voltage mode, which improves the charging speed and efficiency, and improves the response performance. The designed multi-mode control enables the converter to achieve high efficiency at low operating current, and the working current of the converter can be as low as 2.5 Ma. The control chip is based on CSMC 1 渭 m 40V process design. The test results of the chip verify that the switch power supply designed in this paper realizes the fast charging of the mobile terminal. In view of the key technology of wireless charging, how to keep the system in the best working condition during the whole process, In this paper, a new type of inverse E power amplifier is proposed to solve the problem. When the MOSFET of the inverse class E power amplifier satisfies the zero-switching current conduction zero Current switching condition and the zero-switching current derivative conduction zero Current Derivation Switching) condition, it can be kept in the optimal state. A closed loop control technique is proposed, which takes the output load as an independent variable. When the load changes, the amplifier can work in the best state by adjusting the duty cycle and frequency of the control voltage of MOSFET. The control circuit is designed using SMIC 0.18 渭 m 3.3V process. The simulation results show that when the output load varies in the range of 20%, the inverse E power amplifier always works in the best state.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM910.6

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