What are the common detection methods for rectifier bridges?

What are the common detection methods for rectifier bridges?

1. Test the rectifier circuit, find the p terminal and N terminal of the DC power supply inside the inverter, adjust the multimeter to resistance X10, connect the red instrument bar to P, and connect the black instrument bar to R, spark t. The resistance should be about tens of ohms and is basically balanced. On the contrary, if the black watch rod is connected to the P-end in turn, and the red watch rod is connected to R _ (1) s and T in turn, the resistance value is close to infinity. Connect the red watch rod to terminal N and repeat the above steps to get the same result. If you have the following results, you can judge that the circuit is abnormal. a. The three-phase resistance is unbalanced, which may indicate that the rectifier bridge is faulty. b. When the red gauge bar is connected to the P terminal, the resistance is infinite, which can determine whether the rectifier bridge is faulty or the starting resistance is faulty.

2.. In the test inverter circuit, the red instrument bar is connected to the P terminal, and the black instrument bar is connected to uMagine V and W respectively. It should have a resistance value of tens of ohms, and the resistance value of each phase is basically the same, and the phase inversion should be infinite. Connect the black gauge bar to the N terminal, and then repeat the above steps to get the same results, otherwise the inverter module fault can be determined.