共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
从无刷双馈电机的视在功率表达式出发,推导了无刷双馈电机的转矩表达式、主辅绕组的有功功率和无功功率表达式,分析了三者之间的关系,为无刷双馈电机的高性能控制提供了依据。 相似文献
3.
4.
5.
6.
7.
8.
利用Matlab/Simulink对磁阻转子无刷双馈电机的运行方式进行了仿真研究.结果表明,该电机同步运行时,具有较好的起动性能;亚同步运行时,调速性能较好. 相似文献
9.
笼型转子无刷双馈电机的动态特性仿真 总被引:5,自引:0,他引:5
无刷双馈电机在结构上与传统交流电机有较大的不同。本文介绍了对笼型转了无刷双馈电机的结构,原理与运行方式,建立了该种电机通用的数学模型,给出了参数计算方法,并对一台(4+2)极无刷双馈电机的多种运行方式进行了仿真研究。 相似文献
10.
11.
12.
目前,无刷同步电机转子绕组接地检测主要采用传统的方式,没有考虑到无刷同步电机的特殊结构。针对这一情况,提出了一种无刷同步电机转子绕组接地检测的新原理,详细地分析了它的接地检测原理。提出了消除接地检测死区的条件和接地检测的灵敏度不受励磁电压影响的方法。并通过仿真和实验分析验证它的正确性,仿真和实验结果与原理分析相吻合。另外,还考虑了电网突然发生短路故障对接地检测的影响,仿真结果证明,在突然短路的过渡过程中,接地检测不会发生误动作,说明了该无刷同步电机接地检测具有较高的可靠性。 相似文献
13.
无刷双馈电机具有优越的调速性能,且能够运行于变速恒频发电状态,因此在节能调速以及风力发电领域具有很好的应用前景,但其结构和原理比较复杂.为了研究不同笼型转子结构对无刷双馈电机磁场调制作用的影响,从交流电机的基本电磁关系出发,首先分析了定子功率绕组与控制绕组产生的磁动势和气隙磁密,进而导出了转子笼条的感应电动势、电流和磁动势,在此基础上,用实例说明了笼型结构转子磁动势的特点及其对磁场调制作用的影响,最后用有限元计算对理论分析结果进行了验证.理论分析和仿真结果表明,对磁场调制起主要作用的是笼型转子靠近公共笼条的短路环,通过调整转子短路环分布可以增强有效谐波、削弱无用谐波,由此对笼型转子结构进行优化设计. 相似文献
14.
15.
在阐述无刷双馈电机(BDFM)不同转子结构特点的基础上,针对无公共笼条、带公共笼条、带公共笼条公共端环、笼条加磁障、凸极加笼条、ALA磁阻等6种不同转子结构的BDFM,进行了二维瞬态电磁场有限元计算,通过气隙磁场谐波的频谱分析,比较了不同转子结构对BDFM磁场调制效果的影响.研究了不同转子结构BDFM在单馈异步运行以及双馈同步、亚同步和超同步运行时的转矩与转速动态特性.探讨了在控制绕组频率一定的情况下,控制绕组电压大小对转矩和转速稳定性的影响.通过与相关文献的对比,验证了结果的正确性.研究结果揭示了不同转子结构对BDFM磁场调制效果和动态特性的影响,为BDFM的转子结构优化设计和运行稳定性的深入研究奠定了基础. 相似文献
16.
磁悬浮开关磁阻电机多目标优化设计 总被引:1,自引:0,他引:1
研究了一种基于极限学习机(extreme learning machine,ELM)与带精英策略非支配排序遗传算法(improved non-dominated sorting genetic algorithm,NSGA-II)的单绕组磁悬浮开关磁阻电机(single winding bearingless switched reluctance motor,SWBSRM)多目标优化设计方法。结合有限元分析(finite element analysis,FEA),分析了SWBSRM悬浮力、转矩随各结构参数变化的一般规律,得到ELM非参数模型。针对该训练模型并结合NSGA-II进行全局寻优,获得使悬浮力、转矩同时更优的结构参数数值组合。通过对比优化前后电机输出悬浮力、转矩大小,验证了以ELM、NSGA-II为基础的SWBSRM结构多目标优化设计的有效性。 相似文献
17.
Design and analysis of brushless motors for ball screw drives, such as application-specific electric motors, are presented. Since the motor should be designed as a built-in structure for machining equipment, the motor dimensions are restricted. A new design concept for such applications is presented. Under various combinations of motor dimensions and electrical parameters, the motor performance is simulated using a personal computer, and the optimized parameter combination is selected. Based on the optimized parameters, a prototype motor is constructed to prove the validity of the proposed design procedure. © 1999 Scripta Technica, Electr Eng Jpn, 127(3): 41–52, 1999 相似文献
18.
19.
Optimal tooth factors and polar overlap are obtained using numerical calculations of an in-plane magnetic field in the active volume of a synchronous reluctance motor (SRM) with a laminated rotor using FEMM 4.01 (Finite Element Method Magnetics, Version 4.01) software. Recommendations for improving the technical and economic indices of an SRM with laminated rotors at the expense of cutouts in ferromagnetic rotor packs and placing compensatory permanent magnets on the way of transverse magnetic flux closure are given. 相似文献
20.
Masayuki Sanada Mitsutoshi Asano Shigeo Morimoto Yoji Takeda 《Electrical Engineering in Japan》2002,138(4):61-69
A synchronous reluctance motor has many advantages because it has no permanent magnet, such as low back emf in high‐speed operation, maintaining performance in a high‐temperature environment, and so on. Therefore, many rotor constructions have been studied and developed. The rotor with multiflux barrier structure has the merit of easy construction and high performance. The linear synchronous reluctance motor has been developed. It is necessary to improve the performance of the mover design for industrial use, because of its low power factor. In this paper, we propose a novel configuration of mover for the linear synchronous reluctance motor, and examine the static characteristics of the motor with reluctance equalization design by means of the finite element method. From analytical results, it is demonstrated that the static characteristics of the linear synchronous reluctance motor are greatly improved by the reluctance equalization design at the iron layer in the mover. © 2002 Scripta Technica, Electr Eng Jpn, 138(4): 61–69, 2002; DOI 10.1002/eej.1139 相似文献