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1.
提出一种交流电动机定子绕组只接入工频电源的无级调速新方法,在这种方法中,交流电动机的定子是可以转动的,液压控制系统控制电动机定子的转向和转速,依照调速电动机的不同调速运行情况,液压泵电动机可以有停车,电动和异步发电三种不同的运行方式,而调速电动机在各种运行转速下电气参数和机械特性保持不变,文中介绍了样机的研制和初步试验结果。  相似文献   

2.
王丽芳 《防爆电机》2010,45(5):14-16
讨论并分析的是4/8极双绕组双速电动机的并联支路数(以下简称电机)。电机的定子有两套绕组,转子是其中一个。除每一个定子绕组与转子之间的感应电势外,定子的两套绕组之间也有感应电势,如果并联路数选择错误或接法不正确电机都将不能正常工作。  相似文献   

3.
The motor efficiencies of switched reluctance motors (SRMs) are inferior to those of permanent magnet synchronous motors. This paper describes a design procedure for an SRM to obtain a higher motor efficiency. The first step in the design procedure makes clear the principle for improving the motor efficiency. The cross‐sectional and axial shapes of the rotor and stator cores are designed by magnetic field analysis with the two‐dimensional (2D) and 3D finite element method. A high‐efficiency SRM with 12 stator poles and eight rotor poles is designed. The designed SRM was produced experimentally, and was tested to verify its performance. The motor efficiency was improved in comparison to the standard SRM with six stator poles and four rotor poles.  相似文献   

4.
大功率高速永磁电机的损耗与温升等影响电机功率密度的提高。以500 kW、12 000 r/min高速永磁电机为例,分析了电机极对数、定子绕组形式、转子结构、永磁体等对电机性能特别是损耗的影响。采用电机的有限元仿真模型,对电机的转子结构强度、输出性能、损耗进行了分析计算。试制了样机并对相关性能进行试验验证,分析计算与试验结果均表明,电机达到了较高的技术指标要求,为高速永磁电机的优化设计提供了参考。  相似文献   

5.
纵弯复合两自由度直线超声波电动机   总被引:1,自引:0,他引:1  
居奇  李志荣  赵淳生  黄卫清 《微特电机》2005,33(12):18-19,22
介绍了一种一阶纵振模态与二阶弯振模态复合的两自由度直线超声波电动机的结构组成和工作原理,用有限元方法对电机的定子进行了结构动力学设计,并制作了电机样机。对电机定子的工作模态和电机的输出性能进行了测试。实验表明:定子的工作模态与理论设计结果相符,并较好地满足了设计要求;电机的输出速度和推力得到了大幅度提高,从而证明所提出的设计思路是合理、可行的。  相似文献   

6.
研究了一种采用径向振动的驻波型超声波电机。首先分析了电机的结构,然后利用有限元分析软件ANSYS建立定子有限元模型,基于该模型分析了压电陶瓷的结构尺寸对定子振动特性的影响,进而确定了定子的结构尺寸,并进一步分析了定子的瞬态响应特性。最后根据理论分析结果试制了样机,对样机进行了试验测试,测试结果表明,所设计的电机具有较好的输出性能。  相似文献   

7.
何勍  王红静  王宏祥 《微电机》2006,39(5):38-40
为解决直线超声电机动态设计的难度,提出一种方环状直线行波超声电机振子。采用有限元数值方法分析了该种振子可以利用的面内弯曲模态,给出了对边两两激励的一种对称模式,并就所研制的振子模型,进行了实验研究。数值分析与实验结果证实了振子结构的可行性。该类振子的结构对称性为超声电机的动态优化设计提供了方便。此外,振子4个驱动梁的更换使用,可成倍提高超声电机的使用寿命。  相似文献   

8.
新型结构高速无槽永磁同步电机研究   总被引:1,自引:0,他引:1  
针对高速无槽电机电感普遍较小的问题,提出了一种新型结构的高速无槽永磁同步电机。该电机的定子采用一种集成电感的新型无槽结构,由一种新型无槽定子铁心和背绕式绕组两部分组成,能够显著增加每相绕组的漏感;转子采用双层Halbach永磁阵列,可以得到很高的气隙磁密正弦度。首先重点介绍了集成电感的无槽电机定子的结构,分析了漏感增加的机理。通过解析法得到了附加漏感的计算方法,并分析了附加漏感与定子结构尺寸的关系。其次介绍了双层Halbach永磁阵列的结构和特点。通过仿真分析,将新型电机与普通无槽电机的特性进行了对比,验证了增加漏感的优势。最后,制造了一台新型高速无槽永磁同步电机的样机,通过实验证明了新型电机的有效性。  相似文献   

9.
This paper analyzes a novel hybrid axial-transverse flux permanent magnet (PM) synchronous motor achieving high torque density. The stator pole pitch and the rotor pole pitch are the same. The motor is suitable for vehicle traction systems. The new axial-transverse machine has a single-sided or double-sided air gap. The machine has two adjacent quasi-U stator cores with ring-type winding, and the rotor has two PM groups, one outer and one inner. The shape of quasi-U stator core allows changing the flux path without changing power supply polarity. The analytical expressions of the no-load back-EMF and the torque are derived, after the development of 3-D magnetic equivalent circuit (MEC) model. The 3-D finite element method (FEM) is used to analyze the magnetic field, torque, and cogging torque for different skewings of the PMs.  相似文献   

10.
金龙  张焱  徐志科  胡敏强 《微特电机》2004,32(6):8-10,15
介绍了超柱型超声波电动机的特点,用ANSYS进行理论计算,优化设计了短柱体超声波电动机定子压电陶瓷的安装配置形式,改进了定子的支撑,最后通过样机进行了验证。  相似文献   

11.
In order to produce high-efficiency motors at relatively low production costs, a layered block is made from amorphous iron sheets. From the block, stator and rotor cores of a test switched reluctance motor (SRM) are fabricated. The experimental results of the test machine are compared to another test machine made from low iron loss silicon steel type 35A300 in JIS standard. This silicon steel is equivalent to M-22, 300, and V300-35A in ANSI, BS601, and DIN46400, respectively. The validity of the test results is compared and verified through use of an analytical simulation software package. Approximately 6% improvement in efficiency is observed for the prototype SRM with the layered amorphous core material. The SRM test motor has an efficiency of 95.1% at a speed of 8500 r/min with an output of 2.4 kW.  相似文献   

12.
High torque pulsation is a major disadvantage of most interior permanent-magnet (IPM) motor configurations. Choosing the proper number of stator slots and winding distribution as well as increasing number of phases are among the possible solutions for reducing torque pulsation. In this paper, five-phase IPM motor with fractional-slot stator is studied. It is shown that despite other IPM motors, the new five-phase IPM motor with fractional slot has a very low torque pulsation. For comparison purposes, a five-phase IPM motor with common configuration is also considered. It is shown that the torque pulsation of the proposed fractional-slot five-phase IPM motor is much lower than the conventional five-phase IPM motor. Nonlinear finite-element method is used to analyze different machine configurations. A prototype four-pole five-phase IPM motor with 15 stator slots has been built and is used for experimental verification  相似文献   

13.
定子参数计算是应用等值电路进行多相感应电机对称缺相运行性能分析的基础。通过引入关联矩阵反映所缺相数,分别对定子槽漏抗、谐波漏抗、端部漏抗进行计算,得到了十五相感应电机缺一个五相、两个五相绕组对称工况下的定子漏抗。计算结果表明,对于整距集中绕组的十五相感应电机,缺少五相或十相后,每相槽漏抗不变,谐波漏抗增大,而端部漏抗减小,故对称缺相运行工况下的定子漏抗参数与正常工况下并无明确倍数关系。在正常工况及缺十相对称运行工况下对十五相感应电机原理样机进行了堵转试验,试验测得的短路电抗与计算值相互吻合,间接验证了计算结果的正确性。  相似文献   

14.
单绕组无轴承薄片电机功率系统的设计   总被引:1,自引:0,他引:1  
针对单绕组无轴承薄片电机定子绕组电流不满足三相约束关系,传统的三相逆变器无法驱动,根据电机径向悬浮力模型和定子绕组电流模型,设计并搭建了一种基于H桥功率模块的多相驱动功率系统.运用单绕组无轴承薄片电机的原理样机系统,成功实现了电机的五自由度全悬浮,包括径向、轴向和扭转方向.实验结果表明,基于H桥模块的功率系统可对电机各绕组进行独立驱动,使得各绕组电流相互无影响,完全满足单绕组无轴承薄片电机的驱动要求.  相似文献   

15.
高压电机的定子通常采用成型绕组,同时需配套开口槽,导致电机成本增加、气隙磁场谐波含量增大、齿槽转矩增大等一系列问题。为了解决上述问题,可以采用散嵌圆铜线绕组。对于高压电机采用散绕组,绝缘问题是关注和研究的重点。以1台高压散绕组电机为例,利用有限元法分析了高压电机采用散绕组的绝缘结构可靠性,分别分析了匝间绝缘、主绝缘、层间绝缘和端部绝缘的绝缘情况以及主绝缘被冲片毛刺划伤情况下的电场强度分布,并根据分析结果针对电机槽内绝缘做出了优化,制造了1台样机并对样机进行了耐电压试验。验证了高压电机定子采用散绕组在一定程度上是可行的,为高压电机定子绝缘结构设计提供了参考。  相似文献   

16.
Linear actuators are used in various industrial applications. Conventional linear actuators are a combination of a rotational motor and a ball screw, a hydraulic actuator, or a linear motor. However, these actuators have some demerits. This paper proposes a spiral motor (SPRM) that comprises a helical stator and a helical mover. Owing to its helical structure, the SPRM can be expected to show better performance compared to the conventional linear actuator. A stator and a mover are shown in Figs. 1 and 2, respectively. Helical motion is obtained by this motor and only linear motion is extracted by canceling rotational motion at the end effector. There are two types of SPRMs. One has no ball screw on the output axis, while the other has a ball screw. The former can be used in a direct drive system. However, the gap between the stator and the mover should be controlled because the motor is a magnetic levitation system without a ball screw. Further, the motor requires two three‐phase inverters. The other motor is easy to control because it does not require gap control. However, the motor is inferior to the first motor with regard to position control since the friction in this motor is larger. In this study, a prototype of the SPRM is developed. The prototype constructed is a motor with a ball screw. In this motor, the stator and mover are made of block cells. The stator block is shown in Fig. 3 and the mover block is shown in Fig. 4. The prototype of the SPRM shown in Fig. 5, is developed by using these two blocks. An experiment is conducted to examine the driving of the SPRM. The experimental result is shown in Fig. 6. From this result, it is evident that comprising a helical stator and a helical mover can generate linear motion. Another experiment is conducted for measuring the thrust characteristic of the motor. The result obtained is shown in Fig. 7. From the figure, the thrust constant of the spiral motor, Kf, is obtained as 538.0 N/A. © 2011 Wiley Periodicals, Inc. Electr Eng Jpn, 177(2): 58–64, 2011; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.21168  相似文献   

17.
夏加宽  李响    冯小雪  王晓远  王达  张烨 《微电机》2020,(11):7-12
本文针对定子为印刷线路板(printed circuit board,PCB)结构的轴向磁通永磁电机的特点,将一种新型的Halbach永磁体阵列应用于该永磁电机中,并对其性能参数进行分析。通过与传统Halbach永磁体阵列的无铁心轴向磁通永磁电机相比可知:应用新型Halbach永磁体阵列的PCB定子轴向磁通永磁电机在相同尺寸及同等永磁体用量条件下,具有更高的气隙磁密及每极磁通,可获得更高的空载反电势,同时有效地降低了漏磁,使得气隙磁密更接近正弦波,电机的整体性能得到了提升。有限元分析结果和样机的对比试验证明了应用新型Halbach永磁体阵列的PCB定子轴向磁通永磁电机的合理性和有效性。为PCB定子轴向磁通永磁电机的设计提供一定的参考。  相似文献   

18.
A novel cylindrical ultrasonic motor based on Pb(Mg1/3Nb2/3)O3–PbTiO3 crystals is proposed. Timoshenko beam theory and Lagrange equation are used to analyze the dynamics behavior of the stator. The contact behavior between the hemispherical rotor and the cylindrical stator is simulated by Hertz theory. The general modeling is established to estimate the ultimate performance of the prototype motor. The numerical results and the mechanical measurements from the prototype motor validate the theoretical analysis.  相似文献   

19.
采用Pro/E软件建立电机定子虚拟样机模型,利用有限元方法进行了电机定子的运动学仿真和静力仿真,得到了定子地脚螺栓的力学状态、系统的多阶固有振动频率、振型以及应力、位移等参数值。根据仿真结果,分析了定子的危险位置和振型。同时对不同铁心长度的电机定子作结构对比分析,获得电机定子长度的可行性度设计参数区间。仿真结果对振动实验和定子结构优化具有指导意义。  相似文献   

20.
感应电机定子温度场的数值计算   总被引:9,自引:1,他引:8  
针对中小型感应电机结构复杂热模型难以建立的问题,以一台小型感应电机为例,采用有限元方法,建立了电机的二维温度场数值计算模型。给出了定子二维温度场计算的泛函以及相关热性能参数的计算方法;计算了不同负载运行时样机定子的稳态温度场。计算结果与实测值的比较,验证了所采用计算模型及方法的合理性。该电机温度场计算模型可以应用到其他同类电机定子温度场的计算与分析。在该温度场计算模型的基础上,分析比较了机壳散热翅高度的变化对电机定子温度场的影响,研究了气隙温度对定子温度场的影响。  相似文献   

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