一种带金属物体检测的多线圈无线充电系统

发布时间：2018-03-21 01:05

本文选题：无线充电　切入点：电磁感应　出处：《东华大学》2014年硕士论文　论文类型：学位论文

【摘要】：论文介绍了当前流行的几种无线充电技术,并提出了一种带金属物体检测的多线圈无线充电系统的设计方案。该方案采用电磁感应的技术原理,具有成本低、效率高等特点。另外,相比于其他电磁感应技术的无线充电方案,本文方案的特点是低功耗、多线圈及带金属物体检测功能。硬件方面,本文提出的无线充电系统采用美国德州仪器公司的BQ500410A及BQ51013B作为发射端电路和接收端电路的主控部分,并辅以MSP430G2101实现低功耗电路。为了扩大负载设备的充电面积,发射端电路采用三线圈的方案,自动选择最优的线圈来提供能量传输通道。此外,本文方案还设计了寄生金属物体检测及外来物体检测功能,避免了能量传输通道上存在的金属物体产生的涡流发热对无线充电系统的影响。软件方面,本文采川“反向散播调制技术”进行信号调制,并定义了物理层、数据链路层、逻辑层协议,规范了发射端电路与接收端电路之间数据通信。在传输功率控制方面,本文采用的是离散PID控制算法,并结合动态整流控制算法提高系统的瞬态响应速度。最后,本文测试了上述软硬件设计的主要功能,证实了本文设计方案的可行
[Abstract]:In this paper, several popular wireless charging technologies are introduced, and a design scheme of multi-coil wireless charging system with metal object detection is proposed. The scheme adopts the technical principle of electromagnetic induction and has low cost. In addition, compared with other wireless charging schemes of electromagnetic induction technology, this scheme is characterized by low power consumption, multi-coil and metal object detection function. In terms of hardware, the wireless charging system proposed in this paper uses the BQ500410A and BQ51013B of Texas Instruments as the main control part of the transmitter circuit and the receiver circuit, and uses MSP430G2101 to realize the low power circuit. The transmitter circuit adopts a three-coil scheme, which automatically selects the optimal coil to provide the energy transmission channel. In addition, the scheme also designs the functions of parasitic metal object detection and foreign object detection. The effect of eddy current heat generated by metal objects on the energy transfer channel on the wireless charging system is avoided. In the software aspect, this paper adopts the reverse spread modulation technology to modulate the signal, and defines the physical layer, data link layer, logic layer protocol. The data communication between the transmitter circuit and the receiver circuit is standardized. In the aspect of transmission power control, the discrete PID control algorithm is adopted in this paper, and the transient response speed of the system is improved by combining the dynamic rectifier control algorithm. Finally, the main functions of the hardware and software design mentioned above are tested, and the feasibility of the design scheme is verified.
【学位授予单位】：东华大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM910.6

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