电压源型变频器的直流电路参数选择及分析

DC-link circuit element selection and analysis for AC-DC-AC converter

变频调速设计过程中 ,通常都要对所涉及到的各种开关元件和电路器件进行选择 ,本文主要针对交 -直 -交电压源型整流器的直流中间电路的电容元件的选择进行了详细分析 ,并根据具体实例说明了电容的大小对网络电流的影响 ,同时 ,还提出了电路参数选择的设计方法 .另外 ,还具体说明了在不同电路参数的情况下 ,电路运行情况、有关参量的变化等 。

In the design of adjustable speed with frequency variable for AC motor, the selections of switch elements and other electrical elements are often deadt with. In this paper, it mainly described the DCLink capacitor selection for converter of ACDCAC VSIs system in detail, it described also, how the value of capacitance influences the network current with concert example. In the meantime, a design method has been supplied for electrical element selection. By the way, the circuit analysis and dynamic processes of other electrical variableswere discribed and the correspondent experiment sresultswere obtained also.