本文選題：無線充電 + Qi標準　； 參考：《蘇州大學》2014年碩士論文

【摘要】：無線充電具有環(huán)境適應性強、使用方便、防爆安全等優(yōu)點，在一些特殊場合具有重要的應用價值，發(fā)展前景廣闊。效率和通用性是影響無線充電技術推廣應用的最大問題，無線充電聯(lián)盟的Qi標準規(guī)定了無線充電發(fā)射器與電能接收端之間的功率傳輸和通信協(xié)議，可以對無線充電器的輸出功率進行調節(jié)，提高系統(tǒng)的傳輸效率。MC56F82743是Freescale公司最近推出的通用型數(shù)字信號處理器(DSC)，具有較高的性價比。本文設計了符合Qi標準的磁耦合式無線充電器(TX)系統(tǒng)，是作者實習期間參與設計的此芯片的應用方案，能夠與符合此標準的無線電能接收端(RX)配合使用，實現(xiàn)高效率的電能傳輸，同時具有過壓保護、過流保護、低功耗和金屬異物檢測(FOD)的功能。 本文首先對無線充電器的原理進行詳細分析，包括充電器的基本結構、阻抗匹配方式、PFM控制方法等。同時利用Saber軟件對無線充電系統(tǒng)進行仿真，利用搭建的仿真電路可以直觀地了解TX在不同參數(shù)下的工作情況，為系統(tǒng)設計提供參考。 在上文分析的基礎上，根據(jù)Qi標準設計了一臺輸出功率為5W的智能無線充電器，論文詳細地給出了充電器的硬件設計，，包括主控芯片的外設、采樣電路、主功率回路、信號解調電路及物體檢測電路部分。同時給出了系統(tǒng)軟件的詳細設計，包括主要功能模塊的關鍵代碼、程序流程圖，基于電壓增益的TX輸出功率的控制算法PFM+PWM，降低功耗和金屬異物檢測的算法等。 最后，將本文設計的樣機進行實驗驗證，得到充電器在不同工作情況下的波形圖，以及系統(tǒng)的充電效率。結果表明，該無線充電器能夠符合設計要求，且充電性能和效率達到了預期的設計要求。
[Abstract]:Wireless charging has many advantages, such as strong environmental adaptability, convenient use, explosion-proof safety and so on. It has important application value in some special occasions and has a broad development prospect. Efficiency and versatility are the biggest problems affecting the popularization and application of wireless charging technology. The Qi standard of wireless charging alliance prescribes the power transmission and communication protocol between the wireless charging transmitter and the power receiving terminal. The output power of wireless charger can be adjusted, and the transmission efficiency of the system can be improved. MC56F82743 is a universal digital signal processor recently introduced by Freescale, which has a high performance-price ratio. In this paper, a magnetically coupled wireless charger (TX) system, which conforms to Qi standard, is designed, which is the application scheme of this chip, which can be used in conjunction with the standard radio receiver (RX). It achieves high efficiency power transmission, and also has the functions of over-voltage protection, over-current protection, low power consumption and metal foreign body detection FODs. In this paper, the principle of wireless charger is analyzed in detail, including the basic structure of charger, impedance matching method and PFM control method. At the same time, the wireless charging system is simulated by using Saber software. The simulation circuit can intuitively understand the working conditions of TX under different parameters, and provide a reference for the design of the system. Based on the above analysis, an intelligent wireless charger with output power of 5W is designed according to Qi standard. The hardware design of the charger is presented in detail, including the peripheral device of the main control chip, sampling circuit, main power loop, and so on. Signal demodulation circuit and object detection circuit. At the same time, the detailed design of the system software is given, including the key code of the main function module, the program flow chart, the control algorithm of TX output power based on voltage gain, the algorithm of reducing power consumption and detecting metal foreign body, etc. Finally, the prototype designed in this paper is verified by experiments, and the waveform diagram of the charger under different working conditions and the charging efficiency of the system are obtained. The results show that the wireless charger can meet the design requirements, and the charging performance and efficiency meet the expected design requirements.
【學位授予單位】：蘇州大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM910.6

【參考文獻】

相關期刊論文 前7條

1 常書惠;;無線電能傳輸技術與Qi標準[J];電子商務;2011年04期

2 李陽;楊慶新;陳海燕;閆卓;張獻;薛明;;無線電能傳輸系統(tǒng)中影響傳輸功率和效率的因素分析[J];電工電能新技術;2012年03期

3 劉剛;鄭青玉;王德釗;;一種基于電磁感應的無線充電方法[J];北京信息科技大學學報(自然科學版);2013年02期

4 張益銘;;無線充電技術標準淺析[J];數(shù)字技術與應用;2013年04期

5 段力學;;PID參數(shù)整定方法分類與概述[J];現(xiàn)代計算機(專業(yè)版);2012年07期

6 張茂春;王進華;石亞偉;;無線電能傳輸技術綜述[J];重慶工商大學學報(自然科學版);2009年05期

7 邱麗,曾貴娥,朱學峰,孫培強;幾種PID控制器參數(shù)整定方法的比較研究[J];自動化技術與應用;2005年11期

本文編號：2012513