A large production enterprise needs a lot of intelligent equipment, among which switching power supply is a piece of equipment that cannot be ignored by all enterprises. If the quality of switching power supply has problems, the loss of the enterprise will be reduced. will be very large. However, as for how to choose switching power supply, experts suggest that you need to be cautious, and only in this way In order to avoid the problem of loss. Without further ado, the editor of Mingjinfang will introduce the factors to be considered when choosing a switching power supply.

Factors to consider when choosing a switching power supply:

1. Select the correct power supply. When the switching power supply works, part of the power is consumed and released in the form of heat. In order to prolong the life of the power supply, it is recommended to choose a model with a 30% increase in the rated output power.

2. If the load is a motor, light bulb or capacitive load, and the current is large when starting, you should choose a suitable power supply to avoid overloading. If the load is a motor, consider reverse voltage during shutdown.

3. It is necessary to consider the working ambient temperature of the power supply, whether there are additional auxiliary cooling devices, and the output of the power supply at ambient temperature must be reduced. Please refer to the derating curve of ambient temperature and output power.

4. Try to use the standard power supply of the switching power supply manufacturer, including standard size and output voltage. In this way, the lead time is relatively fast; on the contrary, the special size and output voltage will prolong the lead time and increase the cost.

5. Consider the load characteristics. In order to improve the reliability of the system, it is recommended that the switching power supply work under the load of 50%-80%, that is, if the power used is 20W, the output power of the switching power supply should be 25W-40W.

6. Select the appropriate switching power supply input voltage scale, taking communication input as an example, the commonly used input voltage specifications are 110V and 220V, so for 110V, 220V communication switch and general input There are three specifications of voltage (AC: 85V-264V), and the input voltage specification should be selected according to the application field.

7. Choose various functions according to the needs of use: Maintenance functions: Over Voltage Maintenance (OVP), Temperature Maintenance (OTP), Overload Maintenance (OLP), etc. Use function: signal function (normal power supply, power failure)), remote control function, telemetry function, parallel function, etc. Special features: Power Factor Correction (PFC), Uninterrupted Power (UPS).

8. Select the required safety regulations and electromagnetic compatibility (EMC) certification. According to the application, determine the required output voltage and current; the size of the power supply, the device method and the position of the device hole; there are multiple outputs, whether each output needs electrical isolation; input voltage scale; according to the ambient temperature, determine the switching power supply The reduction, the power of the power supply, is the power of the power supply. Whether certification and safety regulations are required; cooling method of the power supply: natural cooling or forced air cooling; electromagnetic compatibility specifications.

9. Choose a well-known brand, the switching power supply as the heart of the electronic equipment is very important to the safe and reliable operation of the electronic equipment.

The above factors to consider when choosing a switching power supply are shared here. In addition, when choosing a switching power supply, you also need to pay attention to the maintenance rate. Only the maintenance rate is guaranteed to be sufficient. Low cost can be achieved to control costs. If this problem is not paid attention to, the maintenance cost of the enterprise will become very high, which will not be of any benefit to the development of the enterprise.