双馈电机的交流励磁电源

文中讨论了“双馈”与“单馈”电机的区别，按电力电子学中电能转换器的种类介绍了转子附加电源（交流励磁电源）的选择原则，并对各类励磁电源的性能及优缺点作了比较。     

基于Multisim的新型中频谐振电源仿真研究

针对一种新型中频谐振电源进行研究,该电源由双电流源供电,电源零线引至谐振电容中点,构成电流源型半桥式晶闸管感应加热中频电源;利用EDA软件Multisim 9.0对该新型电源电路进行仿真,仿真结果与实验结果相符,可以看出电子设计仿真技术方便、高效的特点。     

旋转变压器正交误差的励磁补偿

文中主要讨论了旋转变压器在鉴相工作方式睛因正余弦绕组空间位置不正交和励磁电源输出信号相位不正交而引起的测量误差的表现形式，并据此提出了一种采用励磁电源正，余弦输出信号的相全微调的方法来补偿正余弦绕组因空间位置不正交引起的误差和励磁信号相位不正交引起的测量误差。     

旋转变压器正交误差的励磁补偿

文中主要讨论了旋转变压器在鉴相工作方式下因正余弦绕组空间位置不正交和励磁电源输出信号相位不正变而引起的测量误差的表现形式，并据此提出了一种采用励磁电源正、余弦输出信号的相位微调的方法来补偿正余弦绕组因空间位正不正变引起的误差和励磁信号相位不正交引起的测量误差。应用的实践和理论分析均证明该方法对补偿上述误差是行之有效的。     

基于DSP+μC/OS-Ⅱ的励磁系统的研究

论述基于DSP μC/OS-Ⅱ的全桥零电压零电流开关(ZVZCS)DC/DC移相变换的励磁系统的数字控制实现方法,通过对励磁电压、电流的采样,完成恒励磁电流、恒功率因数、恒无功功率的3种双闭环PID控制。为了实现对励磁系统最优化控制,将μC/OS-Ⅱ嵌入式系统嵌入到DSP中,在多任务环境下对所有任务的监视和调度,解决单任务环境下数控电源实时性差的问题,实验表明该励磁系统的性能相对于晶闸管移相整流励磁有了明显提高。     

速调管发射机励磁电源故障实例分析及处理

励磁电源是保证速调电视发射机正常工作的核心部件,又称聚焦电源,因其要求精度高,所以励磁电源采用电源型电源.励磁电源由分流电路、调整电路、保护电路组成对其常见故障进行分析,提出解决办法.     

大功率,宽调压,高效线性稳压电源

介绍一种大功率、晶闸管可控整流预稳、大范围调压的高效性调整型稳压电源。其主电路无工频变压器，体积小、重量轻、元件少，此外，本电源还可改成可程控的功率源。     

大功率,宽调压,高效线性稳压电源

介绍一种大功率、晶闸管可控整流预稳、大范围调压的高效性调整型稳压电源。其主电路无工频变压器，体积小、重量轻、元件少，此外，本电源还可改成可程控的功率源。     

整流变阻抗电压、晶闸管电流上升率对励磁整流装置阻容参数选择的影响

针对某些励磁大功率柜阻容保护存在的缺陷,文章分析其原因,分析晶闸管反向电压、整流变阻抗电压、晶闸管电流上升率对励磁整流装置阻容参数选择的影响,提出一种考虑相关参数进行励磁整流装置阻容参数计算的新方法,按照此方法设计的励磁整流装置阻容保护在现场运行情况很好。     

通信电源设备维护新概念——武汉洲际通信电源集团有限公司电源监测维护信息中心简介

自改革开放以来,我国的通信事业取得了飞速发展和长足进步。作为整个电信网的“心脏”部分——通信电源也获得了很大发展,老式的晶闸管相控电源正在逐步被高频开关电源取代。由于新型高频开关电源(如武汉洲际通信电源集团有限公司制造的DUM系列大容量智能型高频开关     

A Dynamic Model of the Synchronous Generator Excitation Control System

This paper describes the design and implementation of a low-cost electronic version of a dynamic model capable of simulating the excitation control system of large synchronous generators used in power systems. This system, designed for use with microalternators, consists of a time constant regulator of a new design, a pulsewidth modulated (PWM) chopper driven exciter and an automatic voltage regulator. The results of a wide range of tests, conducted on a 3-kV A Mawdsley Microalternator, equipped with this system, are also presented and discussed.     

调频同步广播技改工程

主要针对北高峰发射台调频同步广播系统实际的运行状态,本着创新、优化系统,提高安全播出可靠性的目的,提出哈里斯发射机与众传同步激励器融合方案。从同步广播系统性能分析到改造方案技术难点的研究,讲述整个融合方案实施过程中遇到的问题和改造后的性能测试。     

新能源汽车驱动电机关键技术

本文详细介绍了新能源汽车的驱动电机总成及基本工作过程;对新能源汽车电机的类型及应用情况进行了总结,大量实例说明,永磁同步电动机广泛应用于新能源汽车上,同时具有高功率、高密度等特点;归纳了永磁电机的几项关键技术;概述了永磁电机的设计方案.     

基于云平台的同步电机远程数据采集与监视控制系统设计

数据采集与坚实控制系统在智能制造领域中是一项重要的组成。电动机是一种动力输出设备,并且应用十分广泛,同时还拥有许多的种类。基于工作电源的差异,电动机可以将其分为交流电动机、直流电动机两个大体类型。而同步电机则是一种交流感应电机,与异步电机十分类似。本文将监视控制系统应用于生产中的同步电机,设计数据采集与监视控制系统,该系统可以有效的增强生产的安全性,并获得良好的效果。     

A high-performance sensorless indirect stator flux orientation control of induction motor drive

A new method for the implementation of a sensorless indirect stator-flux-oriented control (ISFOC) of induction motor drives with stator resistance tuning is proposed in this paper. The proposed method for the estimation of speed and stator resistance is based only on measurement of stator currents. The error of the measured q-axis current from its reference value feeds the proportional plus integral (PI) controller, the output of which is the estimated slip frequency. It is subtracted from the synchronous angular frequency, which is obtained from the output integral plus proportional (IP) rotor speed controller, to have the estimated rotor speed. For current regulation, this paper proposes a conventional PI controller with feedforward compensation terms in the synchronous frame. Owing to its advantages, an IP controller is used for rotor speed regulation. Stator resistance updating is based on the measured and reference d-axis stator current of an induction motor on d-q frame synchronously rotating with the stator flux vector. Experimental results for a 3-kW induction motor are presented and analyzed by using a dSpace system with DS1102 controller board based on the digital signal processor (DSP) TMS320C31. Digital simulation and experimental results are presented to show the improvement in performance of the proposed method.     

A new instantaneous torque control of PM synchronous motor forhigh-performance direct-drive applications

A new instantaneous torque-control strategy is presented for high-performance control of a permanent magnet (PM) synchronous motor. In order to deal with the torque pulsating problem of a PM synchronous motor in a low-speed region, new torque estimation and control techniques are proposed. The linkage flux of a PM synchronous motor is estimated using a model reference adaptive system technique, and the developed torque is instantaneously controlled by the proposed torque controller combining a variable structure control (VSC) with a space-vector pulse-width modulation (PWM). The proposed control provides the advantage of reducing the torque pulsation caused by the nonsinusoidal flux distribution. This control strategy is applied to the high-torque PM synchronous motor drive system for direct-drive applications and implemented by using a software of the digital signal processor (DSP) TMS320C30. The simulations and experiments are carried out for this system, and the results demonstrate the effectiveness of the proposed control     

ACSM1在油田复式永磁电机抽油机上的应用

本文介绍了新型复式永磁同步电机抽油机系统,该系统应用了复式永磁同步外转子电机,并介绍了ABB公司ACSM1提供的完美解决方案。     

基于空间矢量调制的电励磁同步电动机DTC研究

本文将空间矢量调制型直接转矩控制(SVM-DTC)策略引入到同步电动机控制系统中,利用优化的空间矢量组合实现了转矩、磁链误差的精确补偿,同时保证了功率器件开关频率恒定。研究了基于改进电压模型的电励磁同步电动机定子磁链计算方法以及转子励磁控制方式。最后使用Matlab/Simulink环境对所使用的方法进行了仿真验证。     

Parameters and volt-ampere ratings of a synchronous motor drive forflux-weakening applications

This paper deals with the selection of the motor parameters and the inverter power ratings for a permanent magnet (PM) synchronous motor drive in order to meet a given flux-weakening torque versus speed characteristic. Appropriate combinations of stator PM flux linkage, d- and q-axis inductances, and inverter current rating at a given voltage are derived, in normalized values, as functions of the specified flux-weakening speed range and torque limits. By means of these sets of data, the drive designer can easily individuate and compare all the suitable synchronous motors (defined by the d- and q-axis inductances and flux linkage) and the related inverter volt-ampere ratings, for the desired flux-weakening performance. Therefore, this paper can be considered a synthesis work rather than an analysis one and can profitably be used for an optimal design of a synchronous motor drive     

基于VC的三相异步电机启停系统的设计

介绍了一种基于PC机与AT89S51单片机串口通信的三相异步电机控制系统,PC机以VC6.0为开发环境,实现了上位机软件的编制。AT89S51以交流固态继电器为接口器件,实现了三相异步电机的驱动与控制。该系统达到了软件控制电机启停的目的,并给出了硬件与软件程序。整个系统结构简单,实用性强,应用前景广阔。