【作者】 王敏；

【导师】 孙建忠；

【作者基本信息】 大连理工大学 ， 电机与电器， 2013， 硕士

【摘要】 随着我国经济的快速发展,人民生活水平不断提高,对于能源和自然资源的消耗也急剧增加。而我国的传统能源储量并不丰富,煤炭、石油、天然气等主要能源的人均占有量均低于世界平均水平。由此可见,提高对于有限能源的使用效率,是我国可持续发展的内在要求。在节能与环保的时代主题下,充电机作为广泛应用于工矿企业、交通运输业的充电设备,其工作效率、安全可靠度等性能指标有待于进一步提高。鉴于此,本文开展了对移相控制软开关充电机的一系列研究,具有十分重要的意义。本文基于公司委托研发的“3kW移相全桥软开关充电机项目”为背景,以实现充电机的小型化、轻量化、智能化为宗旨,以达到充电机的高效率、高稳定度为目的,重点研究了移相全桥软开关技术,完成了充电机主电路的电路拓扑设计与器件选型,并完成了控制系统的硬件与软件设计。具体工作介绍如下：首先,介绍了本文选题的背景及意义,并探讨了充电机发展的现状,指明了本设计的预期目标。其次,阐述了移相全桥软开关技术的基本原理,对主电路结构和工作过程进行了分析。在此基础上确定了3kW移相全桥软开关充电机的主电路拓扑,并对关键器件做了参数计算及选型,包括功率开关管的选择、高频变压器的参数设计及制作、辅助谐振电感与开关管并联电容的参数计算等。之后,详细介绍了控制电路的硬件设计,包括控制芯片选择,数据采集电路、恒压-恒流PI调节电路、并联均流电路、基于UCC3895的移相脉冲发生电路、串行通信电路以及保护电路的设计等。结合STM32F103VC控制芯片,并基于uVision4开发环境与C语言,开发了服务于充电机功能实现的软件系统。至此,充电机的设计工作基本完成。最后,基于对3kW移相全桥软开关充电机的研究与设计,研制了充电机样机,并进行了一系列实验。实验结果表明,本次设计的充电机主回路拓扑结构合理可行,能够实现预期的目标。同时,所设计的控制系统及软件程序均工作正常,能够实现智能化充电机的功能需求。测试得到的各项工作参数均能够达到设计要求。更多还原

【Abstract】 China’s rapid economic development brings the increase on people’s living standard, while the consumption of energy and natural resources has increased dramatically. However, the traditional resource that supports China’s traditional energy supply is not rich. The possessions of coal, oil, natural gas and other energy per capita are lower than the world level. Thus, the improvement is needed for the efficiency of the usage of the energy is an inherent requirement of the sustainable development of our country. To continue the sustainable development of our country while using the limited domestic resources, it is undoubtedly needed to improve the efficiency of energy usage. As described above, it is quite clear that energy-saving and environment protection becomes the top theme of this era. Since chargers are applied in multiple industrials and transportation system as power charging equipment, it is necessary to increase its efficiency and reliability standard to meet the requirement of our time. Based on this, it is significantly important for us to carry out a series of studies on the phase-shifted soft-switching charger.To build from the project "3kW Phase-shifted Full-bridge Soft-switching Charger", this research is mainly focused on phase-shifted full-bridge soft-switching technology. During the process, the plan for the charger’s main circuit topology and the selection of components has been completed, along with the design of control circus for both hardware and software. By accomplishing the tasks above, the purpose of this research is to achieve the miniaturization, weight reduction and intelligence of charger, while also improve the efficiency and the stability of the charger. The detailed procedures are shown as follows:First, the background and significance of the paper topic and the development status at home and abroad are recommended and discussed, and the design target is pointed out. Second, the basic principles of the phase-shifted full-bridge soft-switching technology are described and the main circuit structure and working process is analyzed. Based on the foregoing, the main circuit topology of the3kW phase-shifted full-bridge soft switching charger is determined, the parameters of critical devices are calculated and selected, including the selection of the power switch, parameters design and manufacture method of high-frequency transformer, and the calculation of parameters of the capacitances which are in parallel with the switch and so on. After that, the control circuit hardware design is introduced in detail, including the selection of the control chip, the design of data acquisition circuit, phase-shifted pulse generating circuit based on the UCC3895, serial communication circuit and protection circuit and so on. Combined with the selected control chip STM32F103VC, and based on the development environment uVision4and C language, the software system to realize the function of the charger is developed. The design of the charger is mainly completed by now.Last but not the least, based on the research and design of the3kW phase-shifted full-bridge soft switching charger, and the prototypes of charger have been made. A series of experiments have been conducted on it. The results of the experiments show that the design of the main circuit topology of charger is reasonable and practicable enough to achieve the desired objectives. Meanwhile, the control system and software programs are working correctly, and this indicates the achievement of the functional requirements for the intelligent charger. The working parameters of the test results are good enough to meet the design requirements.更多还原