一种往复开关磁阻直线电机的设计与控制

以往复活塞式压缩机为应用背景,提出了一种具有简单结构及单方向力驱动的往复式开关磁阻直线电机,并基于有限元方法进行了电机的参数化设计。针对开关磁阻电机的非线性电磁力及磁链特性,基于三维有限元方法分析了电机的位置/电流/电磁力和位置/电流/磁链特性。针对此单方向力驱动的电机提出了一种综合控制策略,其由"推秋千"控制器、PI电流控制器、行程控制器及平衡位置控制器组成。"推秋千"控制器控制电机电流的导通时刻,以保证电机动子在其机械谐振频率上运行,PI电流控制器通过脉宽调制开关功放控制电机电流,行程控制器及平衡位置控制器分别控制行程和平衡位置。在有限元分析和参数测试的基础上,在Matlab/Simulink环境中建立了电机、压缩机及控制系统的仿真模型,并以此分析了给定行程下,控制系统控制直线电机驱动压缩机的动态性能。最后进行了实验测试,并与仿真结果进行了比较,结果相一致,验证了所设计的电机及所提出的控制策略的可行性和有效性,其中的"推秋千"控制器能够使电机动子在其谐振频率上运行。     

新型节能制冷机用直线电机及驱动控制

直线电机直接驱动制冷机的压缩机,省去了一般旋转电机驱动压缩机时需将旋转运动变成直线运动的曲柄联杆机构,所以电机与压缩机一体化设计后具有振动小、寿命长的优点.双直线电机与制冷机压缩机一体化设计的结构方案能够有效地利用空间,大大地减小制冷机的整机结构尺寸.     

压缩机用直线伺服电机及其驱动控制器设计

介绍了1种用于制冷压缩机的直线伺服电机。该电机体积小、振动小、寿命长。介绍了电机的基本结构及其驱动控制器的设计,并就设计中的一些关键技术及难点进行了分析。     

新型双定子动磁式直线振荡电机

直线振荡电机可用于冰箱压缩机及斯特林制冷机中以提高系统工作效率。新型双定子动磁式直线振荡电机结构简单、效率高,铁心压装方式简单,采用单相工频电源,无复杂控制器及传感器。在介绍双定子动磁式直线压缩机基本结构及运行原理基础上,引入磁路法及有限元法方法对电机进行了建模和分析。分析结果与试验结果吻合,证明双定子动磁式直线振荡电机机结构是正确的、可行的。     

平面电机

1前言日本安川公司的“机械手世界”正走向产成品化，这种机械手带有好几个在平面上能自由移动的底座。平面电机是使“机械手世界”具有独特功能的结构要素之一，应用在组装作业系统的电子零部件芯板装配等方面颇见成效。简况如下。2平面电机的结构及原理2．1驱动系统的结构平面电机和旋转磁场的转动电机或两轴线相重合的直线电机的结构不同，该电机可动于具有X、Y二座标，是一种可在二维平面上移动的直线驱动电机，它将X、Y两个轴向的直线步进电机合为一个电机，这种结构可见于“箭关形”电机，曾应用于启动给图机的X和Y轴的轴向驱动。…     

新型双定子动磁式直线振荡电机

直线振荡电机可用于冰箱压缩机及斯特林制冷机中以提高系统工作效率。新型双定子动磁式直线振荡电机结构简单、效率高,铁心压装方式简单,采用单相工频电源,无复杂控制器及传感器。在介绍双定子动磁式直线压缩机基本结构及运行原理基础上,引入磁路法及有限元法方法对电机进行了建模和分析。分析结果与试验结果吻合,证明双定子动磁式直线振荡电机机结构是正确的、可行的。     

永磁直线电动机一种控制系统的实现

设计一种新型直线压缩机驱动用永磁往复直线电动机的控制系统。通过分析直线压缩机的谐振工作特性和动圈式直线电动机的运行特点,在获得直线电动机样机的空载谐振的基础上,采用电机专用控制芯片TMS320LF2407设计了控制系统,完成了压缩机行程采样周期和采样数组的算法。并采用VB6编写了具有良好人机界面的上位机控制程序,解决了新型直线压缩机驱动用直线电动机的控制问题。     

通过控制策略的改进降低广五直线电机的故障率

直线电机轮轨交通系统采用车轮支撑导向、直线电机直接驱动,综合传统轮轨驱动系统和直线电机磁浮系统优点,具有车辆断面小、轴重轻、爬坡能力强、曲线半径小等诸多优势,在国内外城市轨道交通领域占有一席之地.直线电机直接安装在车辆转向架上,承受电、磁、热、机等诸多因素叠加以及雨雪、灰尘侵蚀影响,运行环境较为恶劣.分析直线电机本身带...     

直线电机的应用前景

近年来随着新材料和控制技术的进步，直线电机工业化应用较易实现。作为一种驱动 电机和伺服执行元件，有着广阔的应用前景。该文简要地介绍了直线电机的结构原理及主要技术特点，并列举了在高速磁悬浮列车、驱动电梯、光刻机、调整应用的典型实例。     

双管型直线感应电动活塞压缩机变频驱动

基于驱动活塞压缩机的双管型直线感应电动机的特性分析,提出变频驱动方案,并着重对速度开环VVVF控制调速系统进行建模及仿真.测试结果良好,给双管型直线电动活塞压缩机的控制系统研究提供了理论依据.     

直线电动机驱动冲压机的研究与应用

介绍了用直线电机直接驱动冲压机工作的基本原理、结构、性能以及它的检测与控制方法。和传统式机械冲压机相比, 直线电机驱动的冲压机（ 以下简称电磁冲压机） 具有结构简单、体积小、重量轻、制造周期短、成本低、控制方便、噪音低和省能等优点。目前已研究完成了５０ｋＮ 以下的科研样机, 通过了省级鉴定并获得了多项专利, 现已投入小批量生产, 效果显著。１００ｋＮ 以上的科研样机作为省重点科技攻关项目正在研究之中     

应用直线电机驱动的冲压机

介绍了用直线电机直接驱动冲压机工作的基本原理、结构、性能以及它的控制方法。和传统式机械冲压机相比,它具有结构简单、体积小、重量轻、制造周期短、成本低、控制方便、噪声低和节能等优点。目前已研究完成了５０ｋＮ以下的科研样机,通过了省级鉴定并获得了多项专利,现已投入小批量生产,效益显著。１００ｋＮ以上的科研样机作为省重点科技攻关项目正在研究之中     

Edge effect and independently supplied slot currents in tubular linear induction motors

The linear induction motor (LIM) is divided structurally into the flat and the tubular-type. This paper examines one kind of tubular linear induction motor whose primary configuration consists of four pieces of a flat-type core. We call this type of motor “the square tubular LIM.” The square tubular LIM has various merits of the cylindrical tubular LIM in addition to those of the usual flat-type LIM. The two remarkable features of the square tubular LIM that the flat-type LIM does not have are as follows. The first feature is that it has no edge effect, and the second is that the normal force in secondary conductor is cancelled by that of the opposite side of the secondary conductor. In comparison with the cylindrical tubular LIM, moreover, the square tubular LIM is easy to manufacture and maintain. The tubular LIM also has a feature that its primary winding is a kind of ring winding. Thus we can supply independently the primary current in each slot and hence easily obtain various winding schemes. Finally, the features of the square tubular LIM are studied. After numerically analyzing an experimental model, the motor is driven by the independently controlled slot currents, resulting in the expected performance.     

基于锁相环的空调直流压缩机矢量控制系统

永磁同步电动机因其固有优点在空调直流压缩机中得到广泛应用.传统的120°方波驱动方式,存在着转矩脉动大、噪声高、效率低等缺点.在假设坐标系上构造永磁同步电动机状态观测器,实现对反电动势的观测和对假设坐标系与转子d-q坐标的偏差检测,通过锁相环控制偏差为零来实现转子位置和转速的估算;详细分析了状态观测器的极点配置方法、电流环控制器和速度环控制器的设计方法,利用抗饱和PI控制器避免控制系统饱和现象的发生,提高了系统的稳定性;针对内置永磁体同步电动机的空调直流压缩机,采用最大转矩,电流比控制,提高系统效率.仿真和实验结果验证了本文所提设计方法的可行性和有效性.     

厂用COMPAIR空压机主马达控制回路改造

介绍了河津发电厂厂用空压机主马达控制回路的改造情况。2002年8月，由于人员责任，在润滑油压没有建立的情况下，厂用空压机2次误启，给电厂带来50多万元的经济损失。为此，有关技术部门决定对空压机主马达控制回路进行改造，以保证空压机的安全运行。     

变频高速电机驱动压缩机在西气东输的运用

介绍了西门子LCI变频器及高速电机驱动压缩机系统在西气东输的应用.主要作用是用变频电机驱动压缩机,为长输天然气管线增压.经应用表明,该系统节能降耗、工作可靠、操作方便.通过对驱动系统的构成、主要特点的阐述及工程建设、运行中易出现问题的分析总结,为该类系统在今后相似项目上的运用提供了经验借鉴.     

Optimized Energy‐Saving Speed Profile in Linear‐Motor Railway System

The most striking characteristic of linear‐motor railway system is that the structure consists of a primary and secondary linear induction motor (LIM). The primary side of the LIM is installed in a rolling stock, and the secondary side of LIM is installed on the track. The magnetic attractive vertical force produced by the LIM increases the running resistance since this force is in the same direction as the gravitational force due to which rolling stocks gain weight virtually from the track side of view. In addition, the efficiency of the LIM has different characteristics of efficiency compared with the rotary motor. Previous studies have focused on the design method of LIM to improve motor efficiency and decrease energy consumption. However, it is a well‐known fact that this kind of approach requires hardware renewal which requests large amount of investments. The purpose of this study is to analyze these characteristics of LIM effects and design the optimal speed profile to minimize the energy consumption as a linear‐motor railway system. This smart and economic energy‐saving approach is based on the optimization of speed profiles of the linear‐motor railway system using dynamic programming.     

直线感应电机物流推挂系统速度的检测和控制

在物流传动系统中采用直线电机驱动,控制系统采用高速数字信号处理器,利用DSP的高速处理能力,可以实时完成高性能系统的复杂的控制算法,有助于进行传动系统的故障信息的获取与处理.使这种全数字物流传动系统的运行性能大大优于传统的物流推挂传输系统,从而在许多物流推挂传输系统中得到广泛的应用.本文将介绍该系统的速度测试和PID调节实现方法.     

Synchronous Motors with Cylindrical Rotors for the Petrochemical Industry

An important role is played by the compressor in the petrochemical industry. Typical high-speed compressor drivers are turbines and induction and synchronous motors. The cylindrical-rotor synchronous motor and its application as a high-speed compressor driver is discussed. Important tasks within the production processes of the petrochemical industry include gas liquefaction, compression, refrigeration, and heat recovery. Compressor drive systems constitute important components in plants for such processes. In the past, large high-speed radial and axial compressors were driven mainly by turbines, but in recent years electric motors have been used increasingly. In addition to lower plant costs, the advantages Include high operating efficiency, low pollution, and simpler handling and maintenance. The majority of drives are operating at constant speed, using a four-or six-pole motor with stepup gear. For large ratings, synchronous motors are preferred. For these a number of specific characteristics, such as electrically excited oscillating torques during asynchronous acceleration and special cooling conditions, must be considered. The urge for optimum operating characteristics has led to the development of the synchronous motor with laminated cylindrical rotor, derived from the two-pole turbine-driven generator. The design structure, the steady-state and dynamic operating characteristics, and the starting performance during asynchronous acceleration of such synchronous drive systems are the topics covered here. The theoretical background has been excluded from the normal text and is summarized in the Appendices.