两步换流,two-step commutation
1)two-step commutation两步换流
1.According to its particular leakage current characteristic, atwo-step commutation strategy for RB-IGBT based on input voltage magnitudes detection is proposed.采用新型开关器件逆阻式IGBT(RB-IGBT)实现了一台3kW的三相/单相矩阵式变换器样机,并针对RB-IGBT独特的漏电流特性,提出一种基于输入电压大小检测、适用于RB-IGBT的两步换流方法。
2.Detailed analysis and description on space vector modulation andtwo-step commutation were given, and a prototype matrix converter was built.对矩阵变换器的空间矢量调制法以及半自然两步换流技术进行了分析及阐述,同时研制了一套矩阵变换器样机。
3.A noveltwo-step commutation method is proposed to ensure the reliable commutation between two bi-directional switches.提出了一种新颖的两步换流策略实现了双向功率开关间的可靠换流。
2)semi natural two steps commutation半自然两步换流
1.Among these methods,semi natural two steps commutation is able toi mplement safety commutation of bi-direction switches throughidentifying the input phase voltages.安全换流是矩阵变换器实现应用过程中的关键问题,文中给出了目前主要的几种换流方法及各自特点,其中半自然两步换流是通过判断输入相电压所在区间来实现双向开关的安全换流。
3)two-step commutation strategy两步换流策略
1.Thentwo-step commutation strategy is presented by reducing the commutation time of four-step commutation strategy.仿真和实验结果表明,两步换流策略提高了换流可靠性,改善了输入输出波形质量,其输出电流THD值(总谐波畸变率)由4。
4)two-stage commutation两步换相
1.Analysis oftwo-stage commutation to reduce the vibration and acoustic noise in SRM in frequency domain;对降低开关磁阻电动机振动和噪声的两步换相法频域分析
5)two steps transforming两步变换
6)four-step commutation四步换流
1.Improvement offour-step commutation strategy for matrix converter based on two line voltage synthesis;矩阵变换器双电压法四步换流策略的改进
2.The relationship between the commutation step time and the output voltage distortion is analyzed, and based on thefour-step commutation, an adaptive commutation method by using programmable logical device (PLD) is developed to improve the safety and efficiency of the power circuit commut.文中在分析了矩阵变换器的空间矢量调制控制策略和应用较为广泛的四步换流的基础上,定量分析了换流步长引起的输出电压损失。
3.This paper discusses the security commutation issue of the matrix converter first,and then studies thefour-step commutation strategy for the excitation requirements of the brushless doubly-fed wind generator.本文以矩阵式变换器安全换流问题作为切入点,根据无刷双馈风力发电机控制绕组的励磁要求,对半软化四步换流策略进行研究。
英文短句/例句
1.The Study on Four-step Commutation for Matrix Converters and Its Realization矩阵式变换器四步换流的研究及其实现
2.four-quadrant D.C.converting circuit四象限直流变换电路
3.a synchronous machine that converts alternating to direct current or vice versa.直流电和交流电同步转换的机器。
4.Study on Soft Swith Full Bridge with Current Doubler and Synchronous Rectifier全桥倍流同步整流软开关变换器研究
5.Research of Pipeline Replacement Methodology Based on Asynchronousreplacement;基于异步映射的流水线替换策略研究
6.DC/DC Converter based on Si9122A with Secondary Synchronous Output基于Si9122A的同步整流输出DC/DC变换器
7.Design of fly-back synchronous rectification DC-DC convertor反激同步整流DC-DC变换器的设计
8.crossed parallelogram平行四边形电流换向器方向转动的曲柄
9.Power Exchange Control of Back-to-Back Four-Quadrant Voltage Source Converter;背靠背四象限电压源型变流器功率交换控制
10.A novel control strategy for the PWM rectifier in cascaded multilevel converter四象限级联型多电平变换器的PWM整流器控制
11.Research of Low Voltage/High Current Output DC/DC Converter Based on Synchronous Rectification Technology;基于同步整流技术的低压/大电流输出直直流变换器的研究
12.THE COMPENSATION AND TRANSFORMATION OF CURRENT WAVEFORM OF POWER STEP MOTORS功率步进电动机电流波形的补偿和变换
13.The Phase-Locked Synchronization Control System of AC Motor Variable Frequency/Work Frequency Switching;交流电机变频/工频运行切换锁相同步控制系统
14.A Synchronous Step-Down DC-DC Converter Design;一种基于同步整流技术的降压DC-DC转换器设计
15.Investigation on Single Stage Asymmetrical Half-Bridge Converter with Synchronous Rectification;同步整流单级不对称半桥变换器的研究
16.The Design of Key Circuit Units for Two-Step Pipelined A/D Converter;两步流水式结构模数转换器关键单元设计
17.The Research & Design of High-Efficiency Synchronous Rectification Buck DC/DC Conversion;高效同步整流buck DC/DC转换器的研究与设计
18.The Top-Down Design of a Monolithic Current Mode Buck Converter with Synchronous Rectification;单片同步电流模式降压变换器的Top-Down设计
相关短句/例句
semi natural two steps commutation半自然两步换流
1.Among these methods,semi natural two steps commutation is able toi mplement safety commutation of bi-direction switches throughidentifying the input phase voltages.安全换流是矩阵变换器实现应用过程中的关键问题,文中给出了目前主要的几种换流方法及各自特点,其中半自然两步换流是通过判断输入相电压所在区间来实现双向开关的安全换流。
3)two-step commutation strategy两步换流策略
1.Thentwo-step commutation strategy is presented by reducing the commutation time of four-step commutation strategy.仿真和实验结果表明,两步换流策略提高了换流可靠性,改善了输入输出波形质量,其输出电流THD值(总谐波畸变率)由4。
4)two-stage commutation两步换相
1.Analysis oftwo-stage commutation to reduce the vibration and acoustic noise in SRM in frequency domain;对降低开关磁阻电动机振动和噪声的两步换相法频域分析
5)two steps transforming两步变换
6)four-step commutation四步换流
1.Improvement offour-step commutation strategy for matrix converter based on two line voltage synthesis;矩阵变换器双电压法四步换流策略的改进
2.The relationship between the commutation step time and the output voltage distortion is analyzed, and based on thefour-step commutation, an adaptive commutation method by using programmable logical device (PLD) is developed to improve the safety and efficiency of the power circuit commut.文中在分析了矩阵变换器的空间矢量调制控制策略和应用较为广泛的四步换流的基础上,定量分析了换流步长引起的输出电压损失。
3.This paper discusses the security commutation issue of the matrix converter first,and then studies thefour-step commutation strategy for the excitation requirements of the brushless doubly-fed wind generator.本文以矩阵式变换器安全换流问题作为切入点,根据无刷双馈风力发电机控制绕组的励磁要求,对半软化四步换流策略进行研究。
延伸阅读
电容换相换流器电容换相换流器capacitor commutated converters, CCCd一onrong huonx一ong huonlluq{电容换相换流器(eapacitor。ommutatedeonverters，CCC)在常规换流器的交流侧申人电容器构成换相电路的换流器。电容器一般申接在换流桥和换流变压器之间(如图1所示)。电容换相换流器可以减少换流器的无功消耗，且无功消耗基本不随直流输送有功的变化而变化，减少了换流站无功补偿设备和相应的投切开关;可以显著提高交直流系统运行的稳定性，增加抗扰动能力，减少换相失败的机率，对于连接弱交流系统其作用更加明显，还可以抑制换流阀的短路电流。由于电容参加换相，使阀尖峰电压和谐波有所增加。┌──┬──┐│5 12│凡32│├──┤││││├──┼──┤│542 │562 │└──┴──┘图1电容换相换流器原理图无功平衡在常规换流器中，换流器消耗的无功随直流输送有功的变化而变化。当直流输送额定功率时，换流器无功的消耗近似于输送有功的一半。这需要安装相应的无功补偿设备并通过不断投切无功补偿分组来保持换流母线的电压水平以及与交流系统的无功交换量，见图2(a)。无功补偿装置投切时，对交流系统产生扰动;当直流系统因故障停运时，会在换流站交流母线上产生较高的暂时过电压。 口‘p、呈之!一丝塑生乙限流器不平衡t()叨川，)瓜、亏:乍()图2人犯《P .uj滤波器为印.u》常规换流器和电容换相换流器的无功消耗(a)常规换流界，(b)电容换相换流器采用电容换相换流器后，换流站无功补偿容t可降至小于输送有功功率的15%，并且当直流抽送功率发生变化时，换流器消耗的无功变化缓慢，不偏要安装随有功变化而投切的无功补偿装皿，见图2(b).通过适当选择申联电容的容量，可以使所需的无功由几组高性能、低容量的交流滤波器来补偿，如采用连续可调交流滤波器(见换流站连续可调交流滤波装里).动态德定性能电容换相换流器可以明显改善直流输电的动态稳定性能.电容器的申人直接影响了换相电压，使逆变侧的定关断角运行特性成为正斜率直线。而常规换流器的运行特性为负斜率直线，它和整流侧最小口角特性的交点不是一个稳定运行点(见直流堵电系统运行特性)。而电容换相换流器不存在不稳定工作点，特别是当逆变侧为弱交流系统时，其稳定性显著优于常规换流器。在电容换相换流器中，除了交流母线电压以外，电容器提供了一个附加的换相电压。
