The principle of bridge rectifier

As a kind of rectifier power components, very wide. Applied to various power equipment. The main part of it is a bridge circuit composed of four diodes to realize the conversion of the input AC voltage into the output DC voltage. In each work cycle of bridge rectifier in the same time, only two diodes work function through the one-way conducting diode, to convert AC DC ripple voltage unidirectional. The commonly used small power rectifier anatomy will find the full wave rectifier plastic package structure (small power rectifier most are used in the package form). The four main heating elements in the bridge, the diode, are divided into two groups, each placed on a pin copper plate with direct current output. In the DC output pin two connected between the copper coin, they are respectively connected with the input pin (AC input wire) is formed, we saw in the appearance of the four connecting pin full wave rectifier. Since the series rectifier is used in plastic packaging structure, the pin diode, copper plate, copper wire connection and the surrounding is full as insulating and heat conducting filling material of epoxy resin. However, the thermal conductivity of epoxy resin is relatively low (generally 0.35 DEG W/m, the highest is 2.5 DEG W/m), so the resistance of shell knot, rectifier are generally larger (usually 1.0~10 C /W).