双管正激式智能充电机电路研究与实现

发布时间：2018-11-22 19:06

【摘要】：目前,蓄电池是作为人们使用清洁能源的重要工具,已经得到了广泛应用,随之蓄电池的种类也越来越复杂,作为蓄电池重要充电工具的传统充电机也面临着很大挑战,而拥有适应不同蓄电池组、完善的故障保护功能、无人值守充电、远程修改充电参数等功能的智能充电机需求迫切。本文旨在设计实现一种结合数字控制技术与高频开关技术的智能充电机电路系统,克服传统充电机故障保护功能不完善、能效比低、人工值守充电等弱点。首先,根据论文研究背景提出智能充电机的设计参数和功能指标;其次,确定了整机系统电磁兼容及硬件电路设计方案,分析副边串联型双管正激式隔离DC/DC拓扑的工作原理,选用TI公司的TMS320F2812型DSP来实现数字控制系统;再次,对整机的电磁兼容需求和干扰源作详细分析,提出并设计电磁兼容(Electromagnetic Compatibility,EMC)的解决方法;然后,对整机所有硬件电路进行了设计,以及对重要功率器件的参数选型作了详细阐述;最后,在完成的样机平台上进行波形分析、功能测试、效率测试、电磁兼容测试等,最终验证整机方案的可行性,并满足预期设计功能和参数指标。本文完成智能充电机硬件电路设计和实现,根据最终制智能充电机样机的测试结果,系统最大效率为89%;输出电压和电流精度分别为0.5%和1%;通过CAN或RS-485通信,实现远程充电参数修改、充电曲线绘制、故障记录等功能;完善的保护功能可以实现完全无人值守充电;通过了电磁兼容残酷实验测试,验证整机的可靠性及稳定性。
[Abstract]:At present, battery is an important tool for people to use clean energy, and has been widely used. With the variety of batteries is becoming more and more complex, the traditional charger, which is an important charging tool for batteries, is also facing great challenges. The intelligent charger with the functions of different battery sets, perfect fault protection, unattended charging and remote modification of charging parameters is in urgent need. The purpose of this paper is to design and implement an intelligent charging electromechanical circuit system which combines digital control technology with high frequency switch technology. It overcomes the shortcomings of traditional charging machine such as imperfect fault protection function, low energy efficiency ratio and manual charge on duty. Firstly, according to the research background of the paper, the design parameters and function index of intelligent charger are put forward. Secondly, the design scheme of electromagnetic compatibility and hardware circuit of the whole machine system is determined, and the working principle of the secondary side series double transistor forward isolation DC/DC topology is analyzed, and the TMS320F2812 DSP of TI Company is selected to realize the digital control system. Thirdly, the electromagnetic compatibility requirement and interference source of the whole machine are analyzed in detail, and the solution of electromagnetic compatibility (Electromagnetic Compatibility,EMC) is proposed and designed. Then, all the hardware circuits of the whole machine are designed, and the parameter selection of important power devices is described in detail. Finally, waveform analysis, function test, efficiency test, electromagnetic compatibility test and so on are carried out on the completed prototype platform. Finally, the feasibility of the whole machine scheme is verified, and the expected design function and parameters are satisfied. The hardware circuit of intelligent charger is designed and realized in this paper. According to the test results of the prototype of intelligent charger, the maximum efficiency of the system is 89, the precision of output voltage and current are 0.5% and 1%, respectively. Through CAN or RS-485 communication, remote charging parameters modification, charging curve drawing, fault recording and other functions can be realized, and the perfect protection function can realize completely unattended charging. The reliability and stability of the whole machine are verified by the cruel test of EMC.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM910.6

【共引文献】