【作者】 高春艳；

【导师】 刘和平；

【作者基本信息】 重庆大学 ， 电气工程， 2007， 硕士

【摘要】 为了保持高尔夫球场的美观和优雅的环境,要求球场上的动力车具有零污染、低噪声的特点;同时高尔夫球车对汽车动力性能和续驶里程的要求较低。作为21世纪最有发展前途的绿色清洁汽车,纯电动汽车非常适合在高尔夫球场上使用。论文的主要任务是完成电动高尔夫球车的核心部分——电机驱动系统,实现对高尔夫球车他励直流电机的控制。论文对电机驱动系统做整体方案设计,并对该驱动系统进行仿真分析,证实系统能够实现电动机的调速,并能够实现能量回馈及软开关功能;驱动系统硬件设计中,主控制芯片采用微芯公司针对电机控制设计的芯片dsPIC30F4011。功率模块没有选用性能稳定但价格昂贵的IPM模块,而是采用多MOSFET并联的方式,有效的节约了成本。这是设计中最具有挑战性的部分,在国内工程应用中也属首创。对驱动系统的散热方式和散热材料也进行了周到的考虑。论文对多管并联方式下MOSFET的功率损耗进行了定量的分析,用以指导散热方式的选择并校验其合理性,长期的运行实验证明了该散热系统能达到理想的效果。同时将油门、电压电流的检测、CAN通信、过流故障保护等设计到驱动控制系统中。驱动系统的软件设计中,主要实现的功能为:微控制器通过采样油门踏板的输出信号来调节PWM波形的占空比,从而实现电动机的调速。软件用不同的PWM调制方式还能够实现电机的正反转以及回馈制动。为了监视电动机的运行状态,用CAN通信将电动机运行中一些重要数据实时显示出来,完成了液晶显示仪表的CAN通信及液晶显示程序的编写。论文对驱动控制模块的研制过程进行了介绍,并根据示波器观察的波形,对驱动模型的运行状态进行了分析,重点讨论了在驱动模块引线端并联大电解电容和无感电容对功率MOSFET的影响。他励直流电动机驱动系统能够很好的运行在电动高尔夫球车上,结构简单、性能可靠,并且节约了成本,使电动汽车的价格低到大众能够接收的范围,有利于电动汽车的普及。更多还原

【Abstract】 In order to maintain a beautiful and elegant environment of the golf field, the vehicle used there should have zero pollution and low noise. Meanwhile, the golf vehicle reduces the request of the automobile dynamic quality and travel mileage. Electric Vehicle (EV) becomes a kind of new, fast-developing vehicle in the last years, which has the best future as a green vehicle, as the problems of energy and environment are becoming more and more serious in the 21st century. In this case use of pure electric vehicle as the golf vehicle suite extremely.The drive system is the core part of the electric golf vehicle’s power system, which is also the major work that has been completed by this thesis. The thesis takes the overall plan design to the separately excited DC motor’s drive system, and carries on the simulation analysis to this drive system by SABER software, so that to confirm it can realize the motor’s functions such as speed regulation, energy regeneration as well as soft-switching.For the part of hardware design, the master control chip adopts dsPIC30F4011 of Microchip Company, which is especially designed for motor control. The power module adopts the multi-MOSFET-parallel scheme instead of IPM module, which performance well but rather expensive. In this way, the cost is saved very much. This is the challenging part of this design, and also is the origination in the domestic project application. The heat dissipation mode and heat dissipation material of the drive system also carries on thorough consideration. The power dissipation of the multi-MOSFET-parallel is calculated in this thesis. So that it can instruct the choice of the heat dissipation mode and verify its rationality, the long-term movement experiments prove this cooling system can achieve the ideal effect. The hardware design also includes the accelerator presentation, voltage and current inspection, CAN communication, over current protection, etc.The software of drive system can realize the function of motor speed adjustment according to the accelerator, and the function of motor’s positive and reverse rotation. In order to observe the motor running status, the CAN communication routine and LCD display routine based on the LCD meter has been completed.The development process of the motor drive module is introduced in this thesis. According to the wave profiles get from the oscilloscope, the running statuses of the driven model are analyzed in this thesis. Meanwhile, this thesis discusses the parallel capacity and non-inductive capacity’s protection function to MOSFET.The separately excited DC motor drive system works very well on the electric golf vehicle. The advantages are structure simple, performance reliable and cost litter. It makes the price of the electric golf vehicle lower to the public can accept, so that helps to the popularization of EV.更多还原