Industrial control power supply manufacturers tell you the maintenance problems of industrial control power supply

Industrial control power supply manufacturerLet me tell you that the industrial control power supply is a structural part of the industrial control computer. The industrial control computer is a kind of industrial control computer, which is a very special intermediate product. It provides some intelligent industrial computers for other industries. The following editor will introduce the maintenance of industrial power supply in detail!

1. There are many inhalable particulates in the air: Most of the raw materials in the factory need to be processed by powder. In addition, the outside air is flowing and there is a lot of sand and dust. Industrial control power supply manufacturers tell you that it is easy to accumulate a large amount of sticky dust in the industrial computer. , Causing local temperature in the industrial computer to be too high, causing hardware damage. This situation mostly occurs around cooling fans such as the CPU, power supply, hard disk, and graphics card. Where there is light dust accumulation, regular dust blowing can be used if normal production permits. In places with serious dust accumulation, dust filter gauze can be placed in the ventilation area of ​​the industrial control cabinet, which needs to be cleaned regularly.

2. There is an output voltage, but the output voltage is too high. This failure generally comes from the voltage stabilization sampling and voltage stabilization control circuit. The DC output, sampling resistor, error sampling amplifier such as TL431, optocoupler, power control chip and other circuits together form a closed control loop. Anything wrong will cause the output voltage to rise. If there is a jump, it is generally a bad or damaged switch tube.

3. The environmental humidity is not suitable: The industrial control power supply manufacturer tells you that the industrial computer is composed of integrated circuits with many electronic components, and its insulation performance has a lot to do with the environmental humidity. If the humidity is too high, it is easy to cause the circuit board to be short-circuited and burned; if the humidity is too low, it is easy to generate static electricity, which will also break down some electronic components. Therefore, if the humidity is too high or too low, it will bring potential threats to the industrial computer. On the issue of electrostatic protection, we must have a good instrument grounding on the industrial computer.

4. There is no output and the fuse is normal. This phenomenon indicates that the switching power supply is not working or has entered a protection state. The industrial control power supply manufacturer tells you to measure whether the startup pin of the power control chip has a startup voltage. If there is no startup voltage or the startup voltage is too low, check whether the startup resistor and the external components of the startup pin are leaking. At this time, if the power control chip is normal , The fault can be found quickly after the above inspection. If there is a startup voltage, measure whether the output terminal of the control chip has high or low level jumps at the moment of power-on. If there is no jump, it means that the control chip is broken, the peripheral oscillation circuit components or the protection circuit are defective, and the control chip can be replaced first , And then check the peripheral components.