自然采样、规则采样或者直接调制策略都可以用来确定脉冲宽度,但在脉冲比高于11的情况下,这三种调制策略间仅有的主要差别是,与自然采样PWM相比,规则采样PWM或者直接调制将产生低次的基波谐波。 (2)有效脉冲在半个载波周期内的位置。自然采样PWM在基波周期内将有效的脉冲在半个载波周期的中心附近移动,这在谐波方面占有优势。规则采样
文章对采用2种不同结构(非穿通(NPT)型和穿通(PT)型)IGBT的PWM-VSI型逆变器中出现的功率损耗进行了探讨,以便能针对具体的应用确定合适的器件结构。该逆变器的损耗模型是建立在对其功率损耗进行实验评定的基础上。这种损耗模型采用了2种不同的调制方法,即:一种是叠加了三次谐波的正弦波,另一种是60°-PWM调制(...
UDQ正弦PWM是一种用于单相统一功率因数变流器控制的技术。它也可以用于单相VSI(Voltage Source Inverter,电压源逆变器)或交直变流器以统一功率因数模式运行。这种控制器采用不平衡d-q控制在同步参考框架中实现研究。 在这种控制技术中,控制器能够实时监测电网中的功率因数,并根据需要调整逆变器的输出电压和频率,以确保逆...
Weichbold P., Raumer T.: Influence of Dead Time Effects of PWM-VSI on Current Control, EPE 2001, Graz.Weichbold P., Raumer T.: Influence of Dead Time Effects of PWM-VSI I on Current Control. EPE2001. Graz 2001.P. Weichbold and T. Raumer, "Influence of dead time effects of ...
The output PWM pattern has less harmonic contents compared to asymmetric method. In the five-segment symmetric SVPWM technique the carrier period is divided into five Simulation The implementation process of the proposed SVPWM controller for two-phase VSI is shown in Fig. 6. The controller takes ...
基于三相VSI的PWM型SVG的系统仿真 维普资讯 http://www.cqvip.com
SV PWM modellingDSP modulatorThe present research is concerned with the development of two space vector pulse width modulated VSI models using the software package Matlab. The theoretical principles underlying the space vector modulation technique are presented but have been limited to the few relations...
The goal of this paper is to study the additional loss caused by Pulse Width Modulation (PWM), on the one hand in an axial flux permanent magnet synchronous machine (PMSM), and on the other hand in the voltage source inverter (VSI) that supplies the machine. Via a computationally efficient...
The SVPWM method is one of the most popular real time PWM method for three phase voltage source inverter (VSI). The implementation of SVPWM method becomes complex with an increase in the number of levels in a multilevel inverter. The SVPWM method for multilevel inverter is a multitask ...
在实验设置中, DFIM是3.3千瓦额定功率二极机,和它的参数示于表I.背到后端的PWM - VSI变流器,用于控制所述DFIM转子电流。 翻译结果2复制译文编辑译文朗读译文返回顶部 正在翻译,请等待... 翻译结果3复制译文编辑译文朗读译文返回顶部 在实验的设置中,该文是 3.3 千瓦额定功率两杆机,和它的参数表所示我。背靠背的...