Factors of bridge rectifier damage

Factors of bridge rectifier damage

Generally, because the heat sink is not large enough, the overload impact current is too large, resulting in heat emission.

1.  Load short circuit, bad insulation. Caused by excessive load current.

2.  Frequent starting and stopping of the power supply, if the inductive load belongs to the energy storage element! Then it will generate counter-electrical potential. The rectifier element will reverse breakdown. In the bridge rectifier as long as a bad. Then the symmetrical bridge arm must be burned.

3. Individual components used for a long time, the quality of decline.

4. The input voltage is too high.

The rectifier bridge encapsulates the rectifier tube in a shell. There are full bridges and half bridges. The full bridge is the four diodes of the connected bridge rectifier circuit encapsulated together. Half bridge is the four diode bridge rectifier half encapsulated together, with two half bridge can form a bridge rectifier circuit, a half bridge can also form a transformer with the centre tap full wave rectifier circuit, so the choice of rectifier bridge to consider the rectifier circuit and operating voltage.

整流桥损坏的因素

一般是因为散热片不够大，过载冲击电流过大，导致热量散发不出来。

1. 负载短路，绝缘不好。负荷电流过大引起；

2. 频繁的启停电源，若是感性负载属于储能元件！那么会产生反电动势，将整流元件反向击穿。在桥整流时只要一个坏了，则对称桥臂必烧坏；

3. 个别元件使用时间较长，质量下降；

4. 输入电压过高。

整流桥就是将整流管封装在一个壳内。分为全桥和半桥。全桥是将连接好的桥式整流电路的四个二极管封装在一起。半桥是将四个二极管桥式整流的一半封装在一起，用两个半桥可组成一个桥式整流电路，一个半桥也可以组成变压器带中心抽头的全波整流电路， 因此选择整流桥要考虑整流电路和工作电压。