电动助力携行具电机控制器设计研究
时间:2018-07-07 20:20 来源:毕业论文 作者:毕业论文 点击:次
| 摘要现如今军用承重装备能够使士兵稍微舒适的携带相对重一点军备，使得他们负重时不会因为较长的距离和时间而感觉到筋疲力尽。然而这种装备通常把负荷的大部分重量分担在士兵肩上，使其骨骼长时期处于拉紧状态，足够重量的负荷会对其产生长期损害。电动助力携行具能够使士兵在行进中背负高达吨级的武器装备, 系统本身的动力装置能够协助士兵长距离、长时间的高速运动。随着电动助力携行具技术的成熟，单兵的行进效率将会大幅提升，高速且持久的快速行进将会在战场上发挥重大作用。25389 此次课题主要目的是设计一款稳定的、在各种工况下能工作的电动助力携行具的电机控制器，使得穿戴者可以及时的通过手动调节行进速度。本文首先分析了电动助力携行具控制器的研究背景，确定了将要达到的控制功能。根据携行具的特点及参数对选择使用永磁直流无刷电机和锂电池作为电机和驱动电池。而后对主要几类常用的功率器件比较分析后最终采用功率MOSFET作为功率开关，然后分析调速控制原理和功率MOSFET并联均流特性，设计功率MOSFET并联电路，功率模块驱动以及硬件保护电路。其次，由于功率MOSFET在其开关过程中会产生损耗，并以热量形式散发，此时如果散热功能不好，可能会烧坏功率MOSFET，故本文分析了功率MOSFET的散热路径，计算散热器热阻，设计了合理的散热器。最后采用了飞思卡尔16位单片机MC9S12XEP100作为微控制器，设计了能够达到控制目的的控制模块电路。 毕业论文关键词：电机控制器；直流无刷电机；功率MOSFET；散热器 Abstract Now military load bearing equipment can make the soldiers slightly comfortable carrying a little more armaments, so that they load when not because of longer distances and time and feel exhausted. However, this equipment usually loads most of the weight of the soldier's shoulder, so that the skeletal long period in a tight state, enough weight of the load will produce long-term damage. Electric power assist with the line can enable soldiers to carry up to a ton of weapon equipment in the road, and the power plant of the system can help the soldier to take long distance and long time.. With the electric power carry technical tool of mature, inpidual travel efficiency will greatly enhance the, high-speed and sustained fast marching will on the battlefield play a major role. The main purpose of this topic is design a stable, can work under various working conditions of electric power articles for the motor controller and makes the wearer can timely the by manually adjusting the speed of travel. In this paper, the background of the research on the controller of the electric power booster is analyzed, and the control function is determined.. According to the characteristics and parameters of the carrying line, the permanent magnet brushless motor and the Li battery are selected as the motor and the driving battery.. And on the comparison of several kinds of commonly used power device finally adopted power MOSFET as power switching, and analysis of variable speed control principle and the parallel power MOSFET characteristics of mean flow, design the parallel form of articles for power module. Meanwhile, the design of the power module driver and hardware protection circuit. Secondly, because of the power MOSFET in the switch process will produce loss and in the form of heat emission, at this time if the cooling function is not good may burn out of power MOSFET. Therefore, this paper analyzes power MOSFET thermal path, calculating the thermal resistance of heat sink design reasonable radiator. At last, the control module circuit of the control module is designed, which can achieve the control goal by using the 16 bit microcontroller MC9S12XEP100 as the microcontroller. Keywords: motor controller; brushless motor; power MOSFET; radiator (责任编辑：qin) |