The reactance parameter is an important parameter in designing the rare - earth permanent magnet synchronous machines ( pmsm ) , as well as a important parameter in the research of electric machines " capabilities 电抗参数是稀土永磁同步电机设计中重要的参数之一,也是电机设计和电机性能研究的重要参数。
Traditionally , the resolving - transformer consists of former windings and vice windings . but the resulting output voltage will have aberrance owing to the existence of winding resistors and reactance leakage 传统上的旋转变压器常采用原副线圈来组成,由于线圈电阻和漏抗的存在,将使最终输出电势出现畸变。
Because of the diversity and complexity of pm electric machines rotor structure , the measurement of reactance is always the emphases and difficulty in the measurement of pmsm 由于永磁电机转子结构的多样性和复杂性,电抗参数的测量一直是永磁同步电机参数测试中的重点和难点,其测试设备和测试手段一直处于手工操作的水平。
The reactance of the shield in the zero sequence state is low , which is helpful for the application of new type automatic protecting equipment with short circuit , and the safe running of the cable and other relative equipment 屏蔽层在零序工作状态下的电抗值低,有利于新型短路自动保护设备的应用,有利于电缆及其相关设备的安全运行。
The author introduces in detail the affection of adding magnetism , subtract magnetism of permanent magnet to reactance measurement , as well as the circuit and experiment condition under the influence of the cross saturation effect 详细介绍了电压积分法中电抗参数受永磁体增磁、去磁效应影响以及受交叉饱和效应影响时的测量电路和试验条件。
These tubes have a thickness not exceeding 15mm because of skin effect . the connection between transformer and cables can include the closing of the transformer delta , and its layout wil aim at optimising and balanching the circuit reactance 因集肤效应,管厚要求不超过15毫米.变压器和电缆的连接可形成一个三角形的闭合形变压器,这种设计旨在优化和分流电抗
The changing law of the synchronous armature reaction reactance parameter of the rare - earth permanent magnet synchronous machines is given out by analyzing the testing data , and the reliability of the testing instrument is proved by the experiment 通过对测试系统所测数据的分析研究,总结出了稀土永磁同步电机的电枢反应电抗参数的变化规律,并通过实验验证测量装置的可靠性。
On the analysis of the data acquired with this system , the paper arrived at some rules on the armature reaction reactance of rare - earth pmsm , and testified its reliability by experiment in this paper , four parts are included : 1 通过对测试系统所测数据的整理,总结出了稀土永磁同步电机的电枢反应电抗参数的变化规律,并结合实验验证了系统的可靠性。本文共分四章,主要工作可以归纳为: 1
The effects of the error of ct and vt , hysteresis and load variation to short - circuit reactances are discussed also . by using error analysis and simulation analysis , this paper discussed the feasibility in engineering 论文分析了互感器误差在几种情况下对短路电抗测量结果的影响;通过变压器建模,分析了磁滞特性和负载变化量大小对短路电抗测量结果的影响,验证了该方法在工程应用上的可行性。
The low voltage impulse method , frequency response analysis method and short - circuit reactance method , which can be used to measure and diagnose the deformation of power transformer winding , are introduced in the paper 目前,监测变压器绕组变形的方法主要有低压脉冲分析法( lvi ) ,频率响应分析法( fra )和阻抗分析法。这些方法都需使变压器退出运行,在变压器离线情况下对变压器绕组变形进行测量的。