共查询到18条相似文献,搜索用时 140 毫秒
1.
文章采用OrCAD/PSpice仿真软件对Boost软开关电路进行仿真分析。根据电路中两个开关管实现软开关的条件不同.进行满足软开关条件的理论分析.同时对电路进行仿真分析。为确定元件参数提供科学的理论依据。 相似文献
2.
提出了一种新型无源无损软开关全桥逆变器拓扑,并分析了该电路的工作原理,得出了其软开关工作条件。理论分析显示,此电路可以用较少元件实现桥臂四个有源开关器件的零电流开通与零电压关断,并且零电压电容上的能量直接回馈给负载、原理简单、效率较高,同时具有无源无损软开关功能、成本低、可靠性高和不用附加控制电路等优点。在理论分析的基础上,对所提出的电路进行了仿真和实验,仿真和实验结果都验证了理论分析的正确性。 相似文献
3.
基于Saber的ZVS PWM Boost变换器的分析与仿真 总被引:1,自引:0,他引:1
为了使开关电源达到高功率密度和易于便携的要求,采用高频PWM(Pulse Width Modulation)软开关控制方式,不但利于减小开关电源的体积,而且还能有效降低开关器件损耗和噪音。详细分析了零电压变换ZVS(Zero Voltage Switch)PWM脉宽调制Boost变换器的软开关过程及实现软开关的条件,利用Saber软件对Boost电路在硬、软开关条件下进行了仿真验证。仿真结果表明ZVS PWM软开关变换技术具有开关损耗小、恒频控制和变换效率高等优点。 相似文献
4.
开关磁阻电机驱动系统(SRD)是一种新型无级调速系统。文章以开关磁阻电机的功率变换器为主要研究对象,重点分析了经典的半桥型功率变换电路及一种新型的软开关功率变换电路,并对其进行了Matlab/simulink仿真研究,比较了基于这两种功率变换电路的SRD在相同工作条件下所表现出的不同特性。 相似文献
5.
介绍普通Boost 变换器和Boost-ZVT变换器的工作原理,指出Boost 变换器的开关管工作在硬开关状态,而Boost-ZVT变换器的主开关管工作在软开关状态。通过理论分析可以知道Boost-ZVT变换器的效率更高,然后将两种电路应用于单相功率因数校正电路中。最后在Pspice软件环境下搭建功率因数校正电路Boost变换器与Boost-ZVT变换器的仿真模型并进行仿真,并对仿真结果进行分析和比较,指出了它们各自的优点与缺点。 相似文献
6.
7.
8.
9.
10.
11.
The switching method determines the way messages visit intermediate routers, and has a great impact on network performance. This paper conducts an extensive comparative performance analysis, by means of analytical modelling, of three well-known switching methods proposed for multicomputer networks, namely wormhole switching, circuit switching, and pipelined circuit switching. The results reveal that wormhole switching is the most efficient when messages are short. Pipelined circuit switching can perform better than circuit switching and provides superior performance over wormhole switching when messages are relatively long. 相似文献
12.
本文介绍如何利用计算机仿真技术对于电力电子技术信号分析进行实验辅助教学的一种方法。利用VB作为前台用户程序,采用MATLAB的SIMULINK在后台运行软件,制作实验电路测试分析仿真程序,在实验教学中取得了满意的效果。 相似文献
13.
This paper focuses on switching event-triggered controller design for switched continuous-time systems with actuator saturation. First, we revisit the switching event-triggered sampled-data mechanism (ETSDM) to adapt it to the state feedback control of switched systems with actuator saturation. Then, by thinking of the ETSDM as a switching between periodic sampling and continuous ETSDM, constructing a switching multiple Lyapunov functions to give the analysis and design, and adopting the sector conditions to deal with the saturation, the sufficient conditions and the initial region ensuring the exponential stability of the switched system are proposed. Furthermore, the corresponding solvable conditions for the switching event-triggered controller and the triggering parameter matrices are established. Finally, a circuit example is given to illustrate the validity of the proposed results. 相似文献
14.
15.
Due to undesirable interference via unintended coupling paths, switching converters may exhibit complex intermittency, which appears as a form of bifurcation undergoing regular operation, subharmonics, and chaos orderly and repeatedly for a long period of time. Such intermittent operation, being an unwanted operating state, should normally be avoided in power converters. This paper expounds the mechanism and conditions for the emergence of intermittency in a common current-mode controlled Boost converter. It is found that interference at frequencies near the switching frequency or its rational multiples may induce intermittent operation. The strengths and frequencies of the interfering signals determine the type and period of intermittency. The problem is analyzed by transforming the time-bifurcation analysis to a conventional parameter-bifurcation analysis. Based on this transformation, intermittency can be investigated from the bifurcation control viewpoint. Furthermore, the critical circuit parameter conditions for the emergence of intermittency can be predicted and compared with those from circuit simulation. 相似文献
16.
本文讲述的综合多端接点网络的图解法是对B.H.Рогинский的图解法的改进.在第一节中,定义了基本号码组,给出了构造串并联电路的方法.在第二节中,在考虑迂迴路的情况下,定义了一般号码组和迂迴号码组.利用这种号码组,可进一步使电路简化,甚至有可能构成桥形电路. 相似文献
17.
本文介绍了移相式准谐振变换器控制集成电路UC3875特点及应用场合,并就其组成全桥ZVS软开关3KWDC/DC变换器进行分析研究,给出了电路组成及实验波形。 相似文献