矿用大功率变频器控制系统硬件设计.docVIP

摘 要 伺服系统是一种输出能够快速而精确地响应外部的输入指令信号的控制系统。随着微处理器技术、现代电力电子技术、高性能控制理论以及电机永磁材料制造工艺的发展，人们对伺服控制产品的性能、功能及性价比要求也越来越高。以数字信号处理技术为基础、以永磁同步电机为执行电机、采用高性能控制策略的全数字化永磁同步交流伺服控制系统必将成为伺服控制系统发展的趋势。 永磁同步电机控制的难点是其电流是三相交变的，不能象直流电机一样靠简单的改变电流的大小来对电机实施控制。在研究了各种方法以后，本文决定运用德国工程师FBlaschke等人首先提出感应电机的磁场定向控制理论(即矢量控制)来解决该问题，该理论的思想是通过空间矢量变换方法实现电机磁通和转矩分量的解耦控制。通过这种方法，能使三相电流能象直流电一样进行研究。这样，永磁同步电机就能象直流电机一样进行控制了。 本文详细研究了永磁同步交流电机的矢量控制理论，分析了永磁同步交流电机的数学模型，阐述了电压空间矢量脉宽调制(SVPWM)的原理、算法。随后研究了TMS320F240的工作原理并阐述了空间矢量脉宽调制在TMS320F240平台上的实现方法。 本文通过Matlab/Simulink，对永磁同步电机矢量控制系统进行了建模和仿真。仿真结果表明，论文所建模型正确，可以作为进一步研究永磁同步电机控制的基础模型。 关键词：永磁同步电机；TMS320F240；矢量控制；MATLAB Abstract Servo System is a control system that can fast and accuratly response the external input signal.With microprocessor technology,modern power electronics technology， high-performance motor control theory,as well as permanent magnetic material manufacturing process development,people’s requestments to Servo control’S performance，function and cost are increasingly higher．The use of motor control theory whichbase on digital signal processing technology,the main principle of which is that change analog signal into digital signal，such as the phase current and speed of the motor,and process the digital signal fast and real—time,later feedback the results to motor controller in order to control the motor real—time、accurately and efficiently.In the base of digital signal processing technology,high-performance all-digital control strategy of permanent magnet synchronous AC servo control system is bound to become a populate trend． The difficulty of Permanent magnet synchronous motor control is t11at it can notbe controlled like the DC motor thought simplely changes motors current because ofthree—phase current．After a variety of study,this paper decided to use motor field·oriented control theory proposed by German engineer FBlaschke．The idea of thetheory is use the space vector transformation method to achieve the electricalcomponent of flux and torque decoupling cont