【作者】 曹晨；

【导师】 黄声华；

【作者基本信息】 华中科技大学 ， 电力电子与电力传动， 2005， 硕士

【摘要】 永磁无刷直流电动机是近年来随着电力电子技术和永磁材料的发展而迅速发展起来的一种新型电机。它用一套电子换向装置代替了有刷直流电动机的机械换向装置,既保留了有刷直流电动机宽阔而平滑的优良调速性能,同时又克服了有刷直流电动机机械换向带来的一系列的缺点,因此在各个领域中得到了广泛的应用。本文首先在综合国内外有关文献的基础上,介绍了永磁无刷直流电动机的发展历程、现状和趋势,随后分析了永磁无刷直流电动机的工作原理,根据其原理介绍了电流源型晶闸管逆变器驱动系统的整体构成情况,并针对系统中的各个单元做了详细介绍,包括其硬件构成及软件流程。针对本系统是多相多单元的控制系统,本文着重介绍了应用于本系统中的CAN总线的原理和通信协议,给出了基于SJA1000 的CAN 网络的硬件电路和软件流程,并详细介绍了试验过程中的调试方法,随后对以96 系列单片机和以2407DSP 为核心的两种控制系统进行了比较,设计出以DSP 为核心的控制器的软硬件的实现,软件控制方法上的改进可大大提高控制性能。本文还针对各种不同的控制方法进行了一些仿真工作,对仿真结果进行了分析和解释。最后在完成主电路及控制电路调试的基础上,进行了多项试验,着重分析了系统主要参数选择对系统运行的影响,通过试验波形的对比和分析,验证了本文所述内容的正确性。更多还原

【Abstract】 As an electric mechanical converter, Motor has been widely used from every field of national economy to people’s everyday life. The Permanent-Magnet Brushless DC motor (BLDCM) is a new type of motor with the development of electronic technology and permanent magnet material, which has the merits of both Brush DC motor and asynchronous motor. Because Permanent-Magnet BLDCM has the advantages of high power-density, high efficiency, high rate between torque and current, simpleness for control, it has been talent showing itself in motor drives family for recent years and widely used in every industry area especially in speed-variable applications and servo systems. First, this thesis introduces the development history, present research and trend, analyzes the operational principle of the Permanent-Magnet BLDCM. Then, it deduces the key parts of BLDCM’s control system, with introducing their hardware and software design. CAN bus is used to solve the communications problem in this multi-phase control system. Especially further analyses are made on CAN bus system principle, communication agreement and debugging methods, including the hardware design and software flow chat with SJA1000. This thesis also introduces the difference between the singlechip and DSP, describes how to use DSP to design control system. The thesis makes the simulation for different control methods. By many times of examination, the influence of key parameters to the whole control system is discussed. And some important waveforms are recorded. The comparison and analysis validate the correctness of the conclusion in this thesis.更多还原