永磁同步推进电机电磁振动分析

依据Maxwell应力方程推导了永磁同步电机径向电磁力的解析表达式,分析归纳了电机内各阶次、各频率径向电磁力的来源。以一台45槽10极永磁同步推进电机为例,分别建立了电机电磁有限元模型和结构有限元模型,并进行了模态分析;将电磁有限元模型中得到的径向电磁力耦合到结构有限元模型中,对电机进行了电磁振动谐响应分析;最后将样机实测加速度频谱与有限元仿真结果进行对比,验证了径向电磁力解析式及电磁振动有限元仿真结果的正确性。     

混合励磁直线同步电动机悬浮牵引控制器设计

分析了电磁永磁混合磁体直线同步电动机的悬浮力和牵引力.励磁磁极与电枢之间悬浮力的关系可以分解为三部分,其中励磁磁场和电枢磁场之间相互作用的法向分量产生悬浮力,切向分量产生牵引力.在此基础上导出了实现悬浮力与牵引力独立控制的算法并设计了悬浮与牵引控制器.电机磁场定向驱动控制中,通过实施对定子d轴电流的零控制可以最大程度减小对悬浮的影响.实验结果表明控制效果令人满意.     

九相永磁同步推进电机系统主动切套运行控制策略

主动切套运行是多套多相电机特有的一种对称故障运行方式,可根据负载率选择最佳的运行绕组套数,以优化电机系统效率。本文以三套三相绕组构成的九相永磁同步推进电机系统为研究对象,研究了电机主动切套的控制方法,通过考虑切套前后推进电机本体及其逆变器损耗的变化,得到九相永磁同步推进电机系统全转矩范围内损耗最小的切套运行方式。通过对9kW九相永磁同步推进电机原理样机进行Simulink仿真计算,验证了理论分析的正确性。     

电动飞机电推进用永磁同步电机无传感器控制技术综述

随着绿色航空的发展和新能源技术的不断进步,电动飞机也得到了快速发展。作为电动飞机的核心,电推进系统也受到越来越多的关注。永磁同步电机（PMSM）凭借其功率密度大、效率高等优势成为电动飞机电推进系统的理想解决方案。由于不依赖位置传感器,永磁同步电机无传感器控制技术能够更好地满足电动飞机对高空复杂环境下高可靠性的要求。首先,对当前电动飞机推进用永磁同步电机无位置传感器控制的主要方法进行了总结和比较。其次,针对转子起始位置检测、低速起动以及中高速运行中的关键技术和难点进行了分析。最后,对目前研究中存在的问题进行了归纳,并对未来的发展进行了展望。     

Propulsion Motor Requirements for Mass Transportation

Mass transportation is being recognized as a critical need in modern society. The application requirements of propulsion motors for rail passenger vehicles can be derived from elementary mechanics of motion. The implications in motor design are discussed in this paper.     

轨道车用双绕组同步发电机的数学模型及参数计算

介绍一种用于轨道车的双绕组发电机,在abc坐标系和dqO坐标系下建立了该电机的数学模型,并对有关参数进行了分析计算,为该电机的数学仿真奠定了基础.     

多相感应推进电机振动分析研究

电磁振动是电动机的主要噪声源,对于大中型感应电机,主要是通过优化槽配合的方式增加力波阶数同时避开定子铁心相应的模态来减小电机振动噪声。本文提出基于瞬态动力学有限元计算预测感应电机振动的方法,该方法不仅可以定性地为槽配合的优化提供参考,也可以定量地预估出电机的振动噪声量值,为在设计阶段电机振动的优化设计提供方向。并以某大型多相感应推进电机为例验证了该方法的有效性。     

同步感应电磁推进系统中电枢制造材料的选择

对同步感应电磁推进系统进行了理论分析并建立了单级系统的电路模型,直接建立了电枢制造材料的基本物理参数与电枢感应涡流之间的联系.通过有限元仿真软件模拟比较了不同材质的电枢对电枢受力及电枢加速速度的影响,计算了不同材质电枢对整体系统能量转化效率的影响.结果表明:电枢制造材料的选择将影响电枢的受力方式、整体系统的能量转化率及有效加速载荷的质量,铝制材料在几种电枢制造材料中表现最优.以上分析可为同步感应型电磁推进系统的电枢设计提供参考.     

舰船同步电动机电力推进控制系统辨识与仿真

本文基于舰船多相永磁同步电动机电力推进控制系统的数学模型及其非线性特性,通过螺旋桨负载的建模和非线性系统的逆系统研究方法的应用,以及控制器参数的优化设计,提出采用扩展卡尔曼滤波方法对系统进行参数估算和仿真,取得了令人满意的效果.     

电机试验站用同步电动机的研制

介绍了试验站用7 500k VA三相无刷励磁同步电机在发电机、电动机两种不同工作情况下,可以适用于4个电压等级中。同时介绍了该试验原理,并利用Ansoft/Maxwell2D对电机进行电磁场有限元分析来确定电压。     

同步电动机的VPI技术

同步机VPI整浸技术和外装压工艺相结合,可以实现机座加工和有绕组定子铁心制造的并行生产,缩短生产周期,提高产品质量和经济效益。     

Rapid Transit Experience with Chopper-Controlled DC Motor Propulsion

Bay Area Rapid Transit (BART) cars using solid-state choppers and regenerative braking have accumulated about 154 million car mi since 1972 and are adding about 28 million additional car mi/year. For the February 1978 to February 1979 year, the propulsion system mean time between failures (MTBF) was just over 500 h and contributed 37 percent of all vehicle failures. In the same period, the four-traction motor MTBF was 2174 h, which is more than twice its value of several years ago. Modifications currently planned or in progress are expected to increase the propulsion system MTBF to about 800 h by 1981.     

能量回馈型异步电机测试系统

介绍了一种异步电机测试系统,详细叙述了该测试系统的软、硬件结构.该测试系统采用西门子S7-300 PLC和Sinamics S120驱动器,提高系统的自动化程度和可靠性.系统采用能量回馈技术,将电能回馈到直流母线进行循环利用.负载试验结果表明,该系统节能效果明显,使用方便.     

一台同步电动机的再整步改造

介绍一台高压同步电动机的失步再整步改造及试验情况 ,解决了系统电源短时中断所至停机频繁的问题     

Synchronous Motor Drive with Current-Source Inverter

Steady-state properties of a variable-speed drive using a synchronous motor fed by a controlled current-source inverter are derived from an equivalent circuit model, including saturation, and are confirmed by experiment. The system is shown to be stable under all operating conditions. Control strategy for open-loop operation is discussed.     

Controlled-Power-Angle Synchronous Motor Inverter Drive System

This paper describes a controlled-power-angle synchronous motor inverter system which provides drive characteristics similar to those of an induction motor inverter system. The system consists of a conventional synchronous motor with a shaft-position sensor which controls the firing of thyristors in an inverter. This paper investigates the steady-state properties and control strategies for the controlled-angle synchronous motor inverter system. Some experimental results are presented and compared with theoretical predictions.     

磁阻电机参数测定研究

在分析现有磁阻电机参数测定方法的基础上，提出一种以功角测定的修正值为行特征的新的电机参数测定方法，并给出了实例。     

Start-Up Torques in Synchronous Motor Drives

During run-up as an induction motor, the torque produced by a synchronous machine has oscillating components in addition to the natural frequencies of torsional oscillation of the complete drive system so that the shaft torque may differ substantially from the motor electromagnetic torque. The latter can be divided into four components: 1) a unidirectional or accelerating component, 2) an oscillating component due to magnetic saliency and nonuniform rotor windings, 3) oscillating components due to higher harmonics of air gap permeance and winding magnetomotive force, and 4) components caused by switching the supply. In addition, slot effects and magnetic saturation may also lead to oscillating torque components. The factors affecting the magnitude and frequency of these components are discussed and related to recordings of actual shaft torque.     

A Synchronous Thyristorized DC Motor Drive

A thyristorized dc motor speed control system using phase-locked loop principle is presented. Linear model analysis is given and control performance is studied in terms of system parameters using the root-locus technique. Practical design aspects are discussed, and experimental results obtained with a prototype system intended for a separately excited ?-hp dc motor are given.     

全数字同步电动机励磁控制系统

本文讨论了三环控制的同步电动机励磁系统,即定子电流环,无功电流环和励磁电流环。以及同步电动机失步检测及以80196KC进行控制的方法。