具有卸载网络的3级脉冲逆变器

3-stage pulse width modulation inverter with discharge network

Abstract

The invention relates to a circuit consisting of at least one 3-stage pulse width modulation inverter having a discharge network. The discharge network is formed from at least one coil (L), two capacitors (Cu, Co) and a series connection consisting of four diodes (Dh1-Dh4) poled in the same direction, of which the two outer diodes (Dh1, Dh4) are respectively directly connected to the input terminals (1, 3) for the positive pole and the negative pole of the input voltage. The electrical connection between the two inner diodes (Dh2, Dh3) is connected, by means of the coil (L), to the input terminal (2) for the centre tap of the input voltage and to the central bridge branch of the pulse width modulation inverter. The two capacitors (Cu, Co) are, in one embodiment, respectively connected to the electrical connection between one of the inner diodes (Dh2, Dh3) and one of the outer diodes (Dh1, Dh4) with one terminal, and directly connected to the output terminal (4) with the other terminal. The circuit according to the invention enables the complete elimination of switching losses with a simple and economical structure.
本发明涉及一种由至少一个具有卸载网络的3级脉冲逆变器构成的电路装置。卸载网络由至少一个线圈(L)、两个电容器(Cu,Co)和四个在相同方向上极化的二极管(Dh1-Dh4)构成的串联电路形成,其中两个外部的二极管(Dh1,Dh4)分别直接地与用于输入电压的正极和负极的输入端子(1,3)连接。两个内部的二极管(Dh2,Dh3)之间的电连接一方面通过线圈(L)与用于输入电压的中间抽头的输入端子(2)连接而另一方面与脉冲逆变器的中间桥臂连接。两个电容器(Cu,Co)在一个构型中分别以一个端子与内部的二极管(Dh2,Dh3)中的一个与外部的二极管(Dh1,Dh4)中的一个之间的电连接连接并且以另一端子直接与输出端子(4)连接。借助所建议的电路在简单且廉价的结构中由原理决定地完全避免开关损耗。

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Patent Citations (4)

    Publication numberPublication dateAssigneeTitle
    CN-1713503-ADecember 28, 2005Sma技术股份公司用于将直流电压源的直流电压转换成交流电压的方法
    DE-4219644-A1December 23, 1993Reiner Johannes Dipl I SchuettLoad reduction circuit for hf pulse rectifier - uses inductors on primary side for switch-on load reduction of semiconductor switch pairs
    US-2009244936-A1October 01, 2009Sma Solar Technology AgThree-phase inverter
    US-6278626-B1August 21, 2001Abb Patent GmbhARCP multi-point converter having variable-potential intermediate-circuit capacitances

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Cited By (2)

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    CN-103986359-AAugust 13, 2014富士电机株式会社Power converter
    CN-105391327-AMarch 09, 2016Abb技术有限公司用于三电平逆变器的开关支路及其控制方法