【作者】 石小波；

【导师】 余群明；

【作者基本信息】 湖南大学 ， 机械电子工程， 2008， 硕士

【摘要】 开关磁阻电机调速系统是一种新型的变速拖动系统,也是极具发展潜力的电动车驱动系统之一。由于它仍然存在一些问题,如:电机转矩脉动大、噪音大以及位置传感器的使用增加了电机的结构复杂性等,所以阻碍了它在电动车上的应用。但这些问题均可以采用控制的方法解决。本文则是以降低开关磁阻电机转矩脉动为主要控制目标兼考虑减小其噪声,研究和设计开关磁阻电机的控制系统。首先本文在对前人研究成果以及大量资料文献的了解下,介绍了当前电动车车用电机的情况和发展趋势,通过对比其他调速系统,分析说明了开关磁阻电动机调速系统的优缺点。全面总结了开关磁阻电动机的发展方向及应用前景,描述了开关磁阻电动机调速系统的四个组成部分和运行情况。其次从分析开关磁阻电机的性能入手,基于BP神经网络建立了开关磁阻电机非线性磁链特性反演模型以及转矩特性模型。并且研究和改进了BP神经网络的快速自构形算法。最后在Matlab/Simulink下建立了开关磁阻电机的非线性仿真模型。该模型可用于进一步的控制研究。再者研究了基于转矩观测的瞬时转矩控制与三步换相控制相结合的综合控制方法,并进行了仿真分析,其结果表明该方法能有效降低开关磁阻电机转矩脉动,提高其驱动系统性能。论文最后设计了四相电机控制器,选择专用的DSP电机控制芯片作为主控制器,选择IPM智能功率模块作为功率变换器主开关器件,并对位置检测、电流检测等外围电路进行了设计,对系统进行了软件的分析和编程实现。所设计的控制器为进一步的实验研究奠定了坚实的基础。更多还原

【Abstract】 Switched Reluctance Motor Drive system(SRD) is a new type of speed regulating system.As an electric vehicle drive system,it has great development potential. However,SRM has many questions such as high electrical torque ripple, high noise,the position sensors which increase the complexity of structures and reduce the reliability.These questions are obstacles of the SRM’s application in electric vehicle.But,the problems of SRM can be resolved by the control.In order to reduce the vibration noise and torque ripple in SRD,this article researched and designed the SRM control system.Firstly,based on the results of the predecessors and all kinds of reference, this paper introduced the current application and development of electrical driven motor in EV. Comparing with other driven systems, the advantage and disadvantage of SRD was analyzed, which demonstrated that it is suited for use as driving system in EV.The developmental direction and the pop issue of SRD were put forward in this paper,and the four compositions were introduced and the performance characteristics of SRD was analyzed.Secondly, The nonlinear flux-linkage inversion and torque models of SRM were developed, which made use of measured accurate data and nonlinear mapping ability of BP neural netwok based on fast self-configuring arithmetic.And the fast self-configuring arithmetic has been researched and improved.Then SRM model was built based on Matlab/Simulink.This model can be used to research the control of SRM.Thirdly,the torque ripple minimization algorithm based on torque observation and instant torque control and three-step commutation method have been researched.Then the integration of this two methods was designed and used to control SRM.The simulation results indicate that this integration control method is useful to minimize torque ripple and reduce the vibration noise in SRD.At last a controller of a 4-phase 8/6-pole SRM was developed based on TMS320LF2407 DSP, which made full use of the abundant resources of DSP, adopted IPM as the power switch.The current feedback circuit, position sensor interface circuit and fault protection etc. were provided. The program was carried out by the modularized programming method. All of these will be realized in EV and establishes a good foundation for further research.更多还原