What is a rectifier bridge stack? How to judge whether the rectifier bridge stack is good or not?

The rectifier bridge stack is a rectifier device composed of two or four diodes. Bridge pile has half bridge and full bridge as well as three-phase bridge, three kinds of half bridge and positive half bridge and negative half bridge two kinds. The word symbol for the stack bridge is UR.Basic compositionThe bridge consists of four diodes with four leading legs. The connection point of the negative terminals of the two diodes is the "positive terminal" of the full-bridge DC output, and the connection point of the positive terminals of the two diodes is the "negative terminal" of the full-bridge DC output. The half-bridge consists of two diodes with three leading legs. The pins on both sides of the positive half bridge are the positive terminals of the two diodes, that is, the AC input terminals; The middle pin is the negative terminal of the two diodes, the "positive terminal" of the DC output. The negative terminals of the two diodes on the pins on both sides of the negative half bridge, namely the AC input terminal; The middle pin is the positive terminal of the two diodes, the "negative terminal" of the DC output. A positive half bridge and a negative half bridge make up a full bridge.Basic PrinciplesThe rectifying bridge stack product is made of four rectifying silicon chips as bridge connection and external insulating plastic encapsulation. The high-power rectifying bridge is sealed with zinc metal shell outside the insulation layer to enhance heat dissipation. There are many kinds of rectifier bridge: flat, round, square, bench shape (direct insert and patch), GPP and O/J structure. Maximum rectification current ranges from 0.5A to 100A, and maximum peak reverse voltage ranges from 50V to 1600V. The half bridge is the two diode bridge rectifier half sealed together, with two half Bridges can form a bridge rectifier circuit, one half bridge can also form the transformer belt center tap full wave rectifier circuit. The rectifier circuit and operating voltage should be considered in choosing the rectifier bridge. Rectifier bridge reactor is generally used in full wave rectifier circuit, it is divided into full bridge and half bridge. The full bridge is composed of four rectifier diodes connected and packaged in the form of bridge full wave rectifier circuit. The forward current of the whole bridge has a variety of specifications such as 0.5A, 1A, 1.5A, 2A, 2.5A, 3A, 5A, 10A, 20A, 35A, 50A, etc. Withstand voltage (maximum reverse voltage) there are 25V, 50V, 100V, 200V, 300V, 400V, 500V, 600V, 800V, 1000V and other specifications.Method of discriminationMeasure the resistance from the two AC input ends to the positive output end of the rectifier bridge with the diode gear of the digital multimeter or the pointer meter at 100 or 1000. If it is open or short circuit, it indicates that the rectifier bridge is broken. Normal values should be 400 to 2000 ohms. It can also be measured that the resistance value from the positive end to the input end should be infinite, otherwise it is bad. The resistance from the negative end to the input end should also be 400 to 2000 to be considered normal.