文档介绍：外文翻译
AC chopper technology
Traditionally, the AC voltage transform realizes through the ic induction of the transformer. With the development of modern society, the earth resources exhausted gradually. In order to realize the sustainable development of the human society, traditional transformer which use plenty of copper, iron those precious metal will gradually exit the stage of history, and replace by the AC/AC converter with power electronic, this chopping type surge higher harmonic circuit has the advantages such as less effect, power factor is high, the dynamic effect quickly and has regulating range wide, applicable to industrial and mining enterprises to use a load of intermittent asynchronous motor drag mechanical energy efficiency, and it has certain popular value.
Ac chopper surge, generally there are three kinds of topology structures:
1).The single pipe the two-way series electronic switch cut controlled alternating voltage regulation. Using diode and IGBT a two-way switch and the wave respectively for two-way flow switch, with two groups of stray inductance and capacitance respectively low-pass input and output filter. A good connection for IGBT and diode characteristics can reduce the influence of the inductor leads the exchange flow. The topology of the electric current detection using belt plementary control mode, switch mode from voltage polarity decision,