【作者】 姚瑱；

【导师】 邓智泉；

【作者基本信息】 南京航空航天大学 ， 电力电子与电力传动， 2010， 硕士

【摘要】 开关磁阻发电机与永磁电机相比在功率密度方面存在着不足。本文将无轴承技术和开关磁阻电机的发电技术相结合,研究无轴承开关磁阻电机的全周期发电功能,有望在保持开关磁阻发电机的高速适应性的同时改善其功率密度的局限性。本文推导了全周期发电机的数学模型,建立了全周期发电机的MATLAB仿真模型,并搭建了全周期发电机的实验平台。实验平台主要包括数字控制系统、功率驱动系统、全周期发电机本体、拖动用异步电动机。在此基础上,提出了加宽导通励磁控制策略,在不增加控制复杂性的基础上优化励磁,并解决悬浮力凹陷问题。其后,从开关磁阻发电机的相电流解析及应用出发,研究了电流斩波控制方式下的无轴承开关磁阻全周期发电机,求解其相电流,推导其磁链电流关系式进而分析其能量转换关系,并总结出开通、关断角度的优化方法,进一步提高输出电压。通过仿真和实验证明了加宽导通策略的优越性,验证了相电流解析和开关角度优化方法的有效性。最后展望了下一步的研究工作。本课题受国家自然科学基金(50877036)的支持。更多还原

【Abstract】 The power density of switched reluctance generators (SRGs) is lower than that of permanent magnet generators. Combining SRGs with the technology of bearingless, the full-period bearingless switched reluctance generator (FPBSRG) is studied, which is hopeful to improve the limitation of power density in SRGs as well as holding the high-speed adaptability of them.Firstly, the mathematical model is deduced, and the simulation model is built in MATLAB. Meanwhile, the experimental platform is built, which contains digital control system, power drive system, FPBSRG, and asynchronous motor.Based on the above works, the wide-excitation strategy is proposed to increase excitation and improve levitation force as well as holding the control complexity. The FPBSRG in chopping mode is researched based on the analysis and applications of SRGs. The phase current is obtained, and the expression between flux-linkage and current is also deduced to analyze the energy conversion. The optimization method of firing angles is proposed to increase the output voltage. The simulations and experiments are included to validate the advantage of wide-excitation strategy and verify the effectiveness of current analysis. And the effectiveness of firing angle optimization method is also verified.In the last part of the thesis, the prospect of research is presented.This subject is supported by NSFC (NO. 50877036).更多还原