【作者】 李锋；

【导师】 李淑清；

【作者基本信息】 天津科技大学 ， 控制工程（专业学位）， 2015， 硕士

【摘要】 无刷直流电机(Blushless DC Motor)是近年来发展起来的一种新型的直流电机。无刷直流电机的发展与电力电子技术的发展息息相关。无刷直流电机不仅使用寿命长、调速性能优越、运行效率高,同时还具有机械结构简单、运行可靠等一系列优点。故被广泛运用在汽车工业、造纸工业、精密机床工业、医疗器械等众多生产部门。本文首先研究了无刷直流电机理论,建立其数学模型,提出了一种无刷直流电机控制系统的建模仿真方法。在MATLAB/Simulink环境中,使用Simulink所提供的模块搭建直流无刷电机仿真模型。整个系统采用双闭环控制。速度环采用了一个离散的PI控制器,电流控制器基于滞环电流跟踪型PWM逆变器原理实现。仿真结果与理论分析是一致的,为实际的控制系统设计提供了良好的理论依据。其次,对无刷直流电机控制系统软硬件设计进行了详细的介绍。硬件设计包括以TI公司的DSP28035为核心的控制板和以IXYS公司的功率MOSFET管IXFH150N17T为核心的驱动板。详细介绍了DSP最小系统以及外围通讯电路、逆变电路、MOSFET驱动电路以及保护电路的功能和设计思路。软件设计采用基于模型的设计方法。基于模型设计是一种高效,灵活的设计方法。利用开发工具MATLAB、Simulink、Stateflow、 Real-Time Workshop实现系统的算法模型,算法模型经验证后可由RTW直接生成嵌入式代码,经过少量代码微调即可下载到DSP中运行。设计者只需关注控制算法的设计而不用进行繁琐的编程工作。采用基于模型的设计方法不仅保证了代码的可靠性和高效性,而且降低了开发难度和开发周期。最后,使用上位机软件对CAN总线的信号进行了简单的标定,并且测量了电机运行过程中实际的PWM信号波形,证明了本文所提出的控制策略的正确性和可行性,达到了预期的结果。更多还原

【Abstract】 Blushless DC Motor(BLDCM) is a newly developed type of motor with the development of the power electronic technologies. BLDCM has advantages such as high efficiency, long lifespan, and superior speed control. Besides, it has simple structure, high reliability as well as easy maintenance. Therefore, brushless DC motor has been widely used in aerospace, industrial automation equipment, electrical vehicles industry and so on.Based on the mathematical model and work principle of the brushless DC motor,a method for modeling of BLDC control system was proposed.In matlab/Simulink,the model of BLDC could be established by the combination of the isolated functional blocks. Double close loop control was used for the control system.A discrete PID controller was adopted in the speed loop and a current controller was used in the current loop on the principle of current hysteresis band PWM inverter.After testifying by an experimente,the results are consistent with the theoretical analysis.The simulation provides a basis for an actual control system.The hardware of the whole control system is introducted in detail, which is based on controller PCB and power PCB. Controller PCB is based on DSP28035 produced by TI. Power PCB is based on Power MOSFET IXFH150N17T produced by IXYS. The main power circuit, driver circuit and DSP peripheral circuit are designed. Model-based design is an efficient method in the area of embedded system development. Taking BLDC control for example, the algorithm model can be achieved on the MATLAB platform using Simulink, Stateflow, and Real-Time Workshop.After the validation of algorithm model, RTW will be used to generate embedded code.Code can be downloaded into the flash of the Digital Signal Process with a little modification. The most important thing which designers need to do is modifying the algorithm model rather than programming.It has been proved that this method can not only ensure the efficiency and reliability of the code, but also reduce the difficulty and time in embedded system development.Finally, we calibrate the CAN bus signal by using PC software, and measure the PWM signal on the actual working conditions.It proves that the control strategy is feasible and valid, and achievs the expected results.更多还原