Inverter - An Overview
IGBT’s With Straightforward Switches To have our 3 phases, we must open up and close switches in pairs to direct the flow of present to type our source and return paths, this way the linked motor will encounter Alternating current.
前面介绍了单相桥的脉宽调制，实际上工程中使用最多还是三相桥，其基本电路图如下：
They are going to randomly go in all Instructions but that isn’t any use to us. We want numerous electrons to move in exactly the same route. We do this by making use of a voltage change through the wire, the voltage is like strain and can thrust the electrons.
Image: Microinverters are tiny, compact inverters commonly used for converting the DC output of one photovolatic solar panel into AC which might be fed straight into the ability grid. To paraphrase, Every panel has its individual microinverter.
双极性调制只需要一个比较器就行，简单易实现，单极性调制则需要两个比较器，如下图所示：
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The electrons constantly test to get back for their resource, Therefore if we place items for example lamps in The trail in the electrons, they must go through it which will allow us to perform do the job like illuminating a lamp.
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然而，缺点也显而易见，那就是逆变后交流端谐波分量很大。通常情况下，我们期望得到具有良好正弦性的波形，特别是对于交流电机控制，最好是理想的正弦波，因为基波之外的谐波不产生有效力矩，而是带来力矩的波动。
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