WEE Technology Company Limited
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Manufacturer of Diode Rectifier, Bridge Rectifier, Transistor

How to test the bridge rectifier in a simple way?

Commonly used bridge rectifier detection methods

1, Static Test
(1) Test the rectifier circuit to find the P and N terminals of the internal DC power supply of the inverter, adjust the multimeter to resistance X10, connect the red meter to P, and the black meter to R, S, and T respectively. There should be approximately Resistance value of tens of ohms, and basically balanced.

On the contrary, connect the black meter rod to the P terminal, and the red meter rod to R, S, and T in turn, with a resistance value close to infinity. Connect the red meter stick to the N terminal and repeat the above steps, you should get the same result.

If there are the following results, it can be determined that the circuit has been abnormal, A. The resistance of the three-phase imbalance, can indicate the rectifier bridge failure. B. When the red meter rod is connected to the P terminal, the resistance is infinite, and it can be concluded that the rectifier bridge is faulty or the starting resistance is faulty.

(2) To test the inverter circuit, connect the red meter rod to the P terminal, and the black meter rod to U, V, W respectively. There should be a resistance value of several tens of ohms, and the resistance value of each phase is basically the same, and the reverse phase should be gigantic. Connect the black meter rod to the N terminal and repeat the above steps to get the same result, otherwise it can be determined that the inverter module is faulty

2, Dynamic Test
After the static test result is normal, the dynamic test can be performed, that is, power on and test the machine.

The following points must be paid attention to before and after power-on: 1. Before power-on, confirm whether the input voltage is wrong. Connecting the 380V power supply to the 220V-class inverter will cause explosions (fried capacitors, varistors, modules, etc.) . 2. Check whether each broadcast port of the inverter is properly connected, and whether the connection is loose. Abnormal connection may sometimes cause the inverter to malfunction, and in severe cases, it may explode.

3. Check the fault display content after power-on, and preliminarily determine the fault and cause.

4. If no fault is displayed, first check whether the parameters are abnormal, and after resetting the parameters, start the inverter under no-load (no motor connection), and test the U, V, and W three-phase output voltage values.

If there is a lack of phase, three-phase unbalance, etc., the module or drive board is faulty. 5. When the output voltage is normal (no lack of phase, three-phase balance), load test. When testing, it is best to test at full load.

WEET produce and supply the most popular Flat and Square Bridge Rectifiers, contact us to get more solutions of procurement, test, development.
50A 1000V: KBPC5010 BR5010 GBJ5010
35A 1000V: GBPC3510 BR3510
10A 1000V: GBU1010 GBJ1010
6A 1000V: GBU610
more product support: https://weetcl.com/Products/
Skype, Email: info@weediode.com
Written by WEE Technology Company Limited

WEE Technology Company Limited
We are WEE, We Enhance Efficiency
Manufacturer of Diode Rectifier, Bridge Rectifier, Transistor

WEET Flat Bridge Rectifiers 1000V 6A 10A 50A GBJ1010 GBU1010 GBU610 GBJ5010 Single Phase Silicon Bridge

There are four types of bridge rectifier packages: square bridge, flat bridge, round bridge, and patch MINI bridge.

Square Bridge Rectifiers main packages: BR3, BR6, BR8, GBPC, KBPC, KBPC-W, GBPC-W, MT-35 (three-phase bridge).
Flat Bridge Rectifiers main packages: KBP, KBL, KBU, KBJ, GBU, GBJ, D3K.
Round Bridge Rectifiers main packages: WOB, WOM, RB-1.
SMD MINI Bridge Rectifiers main packages: BDS, MBS, MBF, ABS.

Connect the positive poles of two diode rectifiers (set this junction point as A) to form a series branch, and connect the negative poles of the other two diode rectifiers (set this junction point as B) to form another series branch, and then connect the above two branches in parallel (set the two branches and the connection points are respectively C and D), and the formed circuit is a square bridge rectifier. Also called a single-phase bridge rectifier circuit. AC power is input from C and D terminals, DC power Output from A (positive) and B (negative) terminals.

The Bridge Rectifier is made up of four rectifier silicon chips for bridge connection, and externally packaged with insulating plastic. The high-power bridge rectifier is encapsulated by zinc metal shell outside the insulating layer to enhance heat dissipation. There are many varieties of bridge rectifiers: flat, round, square, bench-shaped (in-line and patch), etc. The maximum rectified current ranges from 0.5A to 100A, and the maximum reverse peak voltage ranges from 50V to 1600V.

The Bridge Rectifier is generally used in full-wave rectifier circuits, and it is divided into full bridge and half bridge.

The half bridge is to seal the half of the two diode bridge rectifiers together. Two half bridges can form a bridge rectifier circuit, and a half bridge can also form a full wave rectifier circuit with a center tap of a transformer. The full bridge is composed of 4 diode rectifiers connected in the form of a bridge full-wave rectifier circuit and packaged as a whole.

The forward current of the full bridge has various specifications such as 0.5A, 1A, 1.5A, 2A, 2.5A, 3A, 5A, 10A, 20A, 35A, 50A, etc. The withstand voltage (the highest reverse voltage) is 25V, 50V, 100V, 200V, 300V, 400V, 500V, 600V, 800V, 1000V and other specifications.

1000V Single Phase Silicon Flat Bridge Rectifiers 6A GBU610, 10A GBJ1010 GBU1010, 50A GBJ5010 are used the most widely.
Consult us more information: https://weetcl.com/Single_Phase_Bridge_Rectifiers/   

more product support: https://weetcl.com/Products/ 
Skype, Email: info@weediode.com
Written by WEE Technology Company Limited