【作者】 赵翔；

【导师】 刘慧娟；

【作者基本信息】 北京交通大学 ， 电气工程， 2014， 硕士

【摘要】 摘要：近年来,我国根据国民经济发展需要,提出铁路建设跨越式发展的总体思路。在这种背景下,我国机车车辆制造骨干企业通过引进先进技术,进行合作生产,创造自主品牌的方式,研制了CRH系列高速动车组。高速动车组的驱动力直接来自三相异步牵引电机,因此对异步牵引电机的研究显得尤为重要。找到一种对异步牵引电机可实现高精度的仿真方法对于开发和研究异步牵引电机来讲有着重要意义。本文以600kW大功率三相异步牵引电机为研究对象,提出了一种异步牵引电机场路耦合有限元仿真的方法。完成了基于SPWM供电和SVPWM供电,异步牵引电机场路耦合有限元仿真的研究,并对此异步牵引电机在两种PWM供电方式下的运行特性做了较为深入的对比分析。本文首先简单地介绍了有限元法计算电机的理论基础和电磁场有限元仿真分析软件Ansys Maxwell,并在Maxwell14环境下,建立了600kW异步牵引电机的有限元仿真二维模型。将该模型的仿真结果对比该电机在额定状态下运行的数据,以来验证该电机有限元仿真模型的正确性。然后,分别介绍了SPWM逆变电路和SVPWM逆变电路的工作原理,并在Ansys Simplorer9环境下建立了SPWM逆变电路和SVPWM逆变电路的仿真模型。通过对不同制约条件下逆变电路输出线电压的谐波分布进行对比分析,选择最适方案,最终确定两个逆变电路的调制参数和直流电压。随后利用Maxwell软件中的异步牵引电机有限元模型配合以Simplorer软件中的逆变电路模型,完成了基于两种PWM (SPWM和SVPWM)供电异步牵引电机场路耦合有限元仿真。本文最后从直流电压利用率、电流、损耗、转矩和磁链等几个方面对两个仿真做了全面的对比分析。仿真结果验证了由PWM逆变器供电时,给异步牵引电机带来了不利影响；并体现了SVPWM供电方式对比于SPWM供电方式的优势。更多还原

【Abstract】 ABSTRACT:In recent years, according to the needs of the national economic development, the Chinese government put forward the overall plan of railway leap-forward development. In this context, the locomotive manufacturing enterprises of Chinese developed a series of CRH high-speed emu. The driving force of the high-speed emu is directly from the three-phase asynchronous traction motor, so the study of asynchronous traction motor is particularly important. To find a can higher precision simulation method for the research and development of asynchronous traction motor has important significance.In this paper, the600kW high-power three-phase asynchronous traction motor was studied, and a field-circuit coupled finite element analysis method of the asynchronous traction motor was presented. The field-circuit coupled finite element simulations of the asynchronous traction motor fed by SPWM and SVPWM inverter were completed, and the asynchronous traction motor in the running characteristics of two kinds of PWM power supply mode were done to a comparative analysis.At first, the basic theory of finite element method to calculate the motor and electromagnetic field finite element simulation analysis software Ansys Maxwell were simply introduced in this paper. The finite element2D simulation model of the600kW high-power three-phase motor was established in Maxwell14. The simulation results of the model were compared with the rated value of the asynchronous traction motor to prove the validity of the simulation model. Then, the working principles of the SPWM and the SVPWM inverter circuits were respectively introduced, and the simulation models of the SPWM and the SVPWM inverter circuits were established in Ansys Simplorer9. Through the comparative analysis of the harmonic distribution of the output line voltage under the different constraints, choose the optimal solution to determine the modulation parameters and the dc voltage of the two inverter circuits. The co-simulations were completed which involving finite element analysis and equivalent circuit simulation together for PWM (SPWM and SVPWM) inverters fed asynchronous traction motor assisted based on Maxwell2D and Simplorer. Finally, this paper from the utilization rate of dc voltage, current, loss, torque and flux linkage of the two field-circuit coupled finite element simulations to do a comprehensive comparison and analysis. The simulation results demonstrated the asynchronous traction motors were brought adversely affect by PWM inverter; And the advantages of SVPWM supply mode contrast to SPWM supply mode were presented.更多还原