电力电子技术四开关技术与方法.doc

2011年 7 月 6 日 摘要 电力电子技术出现于20世纪50年代，1957年美国通用电气公司在晶体管的基础上研制出了第一个晶闸管，当时被称作可控硅（silicon controlled rectifier,SCR）.晶闸管是一种利用半导体PN结原理开发出的固体可控开关，他可以用小电流控制开关导通，从而控制高电压大电流的电路。 随着电力电子技术的飞速发展，各种大功率开关器件得到了广泛应用。它们一方面给电能的变换应用带来了方便，另一方面又给电力系统带来了繁重的无功控制和谐波治理问题。电力电子四开关技术应用尤为广泛。 电力电子技术是研究电能形式变换的技术，这些变换的基本类型有：交流－直流、直流－直流、直流－交流和交流－交流的变换。电力电子电路是一种开关电路，具有非线性的特点，研究电力电子电路主要采用波形分析和分段线性化处理的方法。现代仿真技术为电力电子电路的研究和分析提供了极其方便的工具。 四开关组成的电路既可以用于整流也可以用于逆变，本文主要介绍三相四开关逆变器，滤波器。 关键词 三相四开关；SPWM变换器；整流器；逆变器；滤波器 Abstract Power electronic technology appeared in the 1950 s and in 1957 the general electric company on the basis of the transistor developed the first thyristor and then was called SCR silicon controlled rectifier, SCR . The thyristor is a use of semiconductor PN junction principle development of a solid controllable switch, he can use small current control switch conduction, so as to control high voltage large current circuit. With the rapid development of the power electronic technology, all kinds of high power switch device to a wide range of applications. They hand to power transformation application convenience, on the other hand, to the power system brought heavy reactive control and harmonic management problem. Power electronic technology is widely used four switch. Power electronic technology is the study of the form of electrical energy transformation technology, they transform the basic types of exchange-a: dc, dc-dc, dc-communication and exchange-communication transform. Power electronic circuit is a kind of switch circuit with nonlinear characteristics, study the main power electronic circuits of the waveform analysis and subsection linearization method. Modern simulation technology for electric power electronic circuits of research and analysis provides extremely convenient tool. Composed of four switch circuit can be used either for rectification can also be used for inverter, the thesis mainly introduces three phase four switch inverter, filter. Key words Four-switch three-phase;