Analysis Of Systematic Fault Diagnosis And Advanced Maintenance Technology Of Switching Power Supply

Regarding the selection of dummy load, a 30-66W/12V bulb (used in cars or motorcycles) is generally selected as a dummy load. The advantage is that it is intuitive and convenient. According to whether the bulb can emit light and the brightness of the light, it can be known whether 3 phase power supply has voltage output and the output voltage. In order to reduce the starting current, a 30W soldering iron or a high-power 600Ω-1kn resistor can also be used as a dummy load.

Replacement method

In the LCD Pfc DIN Rail Three-Phase Rail Power LED Driver, a power control chip is generally used, and this type of 48v 20a smps control chip is very cheap. Therefore, when it is estimated that there is a problem with the power control chip, you can consider using the replacement method to replace it.