Rectification circuit composed of bridge piles, fault handling, and circuit fault analysis

What are the rectifier circuits and fault handling for bridge stacks? Is the bridge stack composed of a positive polarity bridge rectifier circuit and fault analysis?

Description of Bridge Pile Fault Characteristics

1. Breakdown fault, that is, there is a diode breakdown inside.

2. Open circuit fault, that is, one or two diodes inside have an open circuit.

3. The bridge stack is overheating, mainly due to overcurrent faults in the circuit or excessive internal resistance of a diode in the bridge stack.

Regardless of whether an open circuit or breakdown fault occurs in the bridge stack or half bridge stack, it cannot function properly in the circuit, and some may even damage other components in the circuit.

 Multi meter detection method for bridge piles

Utilize the R&TImes of a multimeter; The 1k gear can easily detect the quality of the full bridge stack and half bridge stack, and its basic principle is to measure the forward and reverse resistance of each diode inside.

In the above four sets of tests, if there is one open circuit (infinite resistance) or one short circuit (several tens). The quality inspection method for the half bridge stack is the same as above, and it is simpler because there are only two diodes in the half bridge stack.

Bridge stack forming positive polarity bridge rectifier circuit and fault analysis

The bridge rectifier circuit composed of a bridge stack is the same as the rectifier circuit composed of four diodes. ZL1 in the circuit is a bridge stack, and its internal circuit consists of four rectifier diodes connected to form a bridge circuit. If the internal circuit of bridge stack ZL1 is inserted into the circuit, it becomes a standard positive polarity bridge rectifier circuit, and the circuit analysis method is the same as before.

After mastering the working principle of the positive polarity bridge rectifier circuit of discrete components, it is only necessary to conduct circuit analysis around the four pins of the bridge stack ZL1:

1. Two AC voltage input pins "~" are connected to the secondary coil of the power transformer, and there is no positive or negative polarity distinction between these two pins.

2. The positive terminal "+" is connected to the rectifier circuit load to output a positive polarity DC voltage.

3. Connect to the ground wire. In circuits that output positive polarity voltage, the negative terminal must be grounded.