Share the Fault Cause of the inverter function module of Yangsheng inverter power supply from Hong Kong

I have talked about the principle of variable frequency power supply before, but many users and enterprises still do not know it, and do not pay much attention to the normal maintenance and maintenance of Variable Frequency Power Supply in Hong Kong.

When using the Frequency Conversion Power Supply in different seasons, the single-phase and Three-Phase Frequency Conversion Power Supply in Hong Kong must also pay attention to some problems in different environments, such as heat dissipation and moisture resistance in summer, moisture Protection and many other problems.

So today I will share with you an introduction to the maintenance methods of the inverter function module in the Variable-frequency power supply.

First of all, we need to know that the function module of the variable distribution source is composed of several components: at the top of the side panel, it consists of IGBT, heat sink, fan, and filter capacitor.

The following lists some causes of inverter function module damage of the inverter power supply:

1. Due to the aging of the filtering capacitor of the Frequency Conversion power supply, the capacity increases or the external inductance increases, so that the over-voltage absorption of the busbar can be decreased. The over-voltage on the busbar is too high and the IGBT is damaged.

2. The variable-frequency power supply load is connected with a capacitor, or the capacitor is too large due to improper wiring, so that the power tube has an impact current;

3. When the power module is changed during maintenance, the IGBT is damaged during welding due to no static protection measures. Or the damage caused by short-term use due to poor handling of heat dissipation, fastening and insulation during repairs;

4. If the input power grid voltage is too high or there is a strong Overvoltage when there is a high voltage, the overvoltage is damaged. If the overvoltage absorption circuit of the power switch in the machine is damaged, the IGBT is damaged due to the inability to absorb the overvoltage, 1.

5. Automatic disasters, such as lightning strikes and house leaks;

6. The filter capacitor is changed after repair. Because the capacitor quality is poor or the connection to the capacitor is longer than the original one, the inductance is added to reduce the voltage range of the busbar, the IGBT and IPM are damaged because the main power supply enters the alternating current.

The above problems may occur under normal circumstances in the general frequency conversion power supply.

Article from: Yangsheng, Hong Kong [http://www.cnzgys.com/news/bianpindianyuanweixiu/171.html]

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Share the Fault Cause of the inverter function module of Yangsheng inverter power supply from Hong Kong