Brief introduction of inverter cooling fan and related problems of inverter cooling

Frequency converter cooling fan Frequency converter (Variablefrequency Drive, VFD) is a kind of power control equipment that uses frequency conversion technology and microelectronics technology to control AC motors by changing the working power frequency of the motor. The heating of the inverter. Like any other device, heat is always generated by internal power loss. In the frequency converter, the proportion of each part of the loss is roughly as follows: () Inverter circuit: about %. () Rectifier and DC circuit: about %. () Control and protection circuit: about %～%. Simply put, for every kVA of inverter capacity, its power loss is about ~W. In order to ensure the normal and reliable operation of the inverter, the inverter must be dissipated. The following methods are usually adopted: ① Use the inverter cooling fan to dissipate heat: The built-in cooling fan is generally used for small-capacity general-purpose inverters. By installing the inverter correctly, the heat dissipation capacity of the built-in fan of the inverter can be maximized. The built-in fan can take away the heat inside the inverter and conduct the heat through the iron plate of the cabinet where the inverter is located for final heat dissipation. The method of only installing a cooling fan in the inverter is suitable for control boxes equipped with separate inverters and control boxes with relatively few control components. If there are several inverters or other electrical components with relatively large heat dissipation in the inverter control box, the heat dissipation effect is not obvious. ② Reduce the installation environment temperature: Since the inverter is an electronic device, containing electronic elements, electrolytic capacitors, etc., the temperature has a greater impact on its life. The ambient operating temperature of general-purpose inverters generally requires ℃~℃. If measures can be taken to reduce the operating temperature of the inverter as much as possible, the service life of the inverter will be prolonged and the performance will be relatively stable. No matter which heat dissipation method is used, the power consumption of the inverter should be determined according to the capacity of the inverter, and the appropriate cooling fan or appropriate radiator should be selected to achieve the best cost performance. At the same time, the environmental factors used by the inverter should be fully considered. Consider it. For the harsh environment (high temperature, high humidity, coal mine, oil field, offshore platform), corresponding measures must be taken to ensure the normal and reliable operation of the inverter. From the inverter itself, the influence of unfavorable factors should be avoided as much as possible. For example, the influence of dust, wind and sand can be sealed to ensure that the heat dissipation duct is in contact with the outside air, so as to avoid the influence of dust, wind and sand on the inside of the inverter; for salt Fog, damp, etc. can be used for insulating and spraying the components of the inverter; the inverter used for field operations should be protected to prevent sun, fog, dust and rain; for high temperature and high humidity environments, air conditioning and other equipment can be added to cool down , Provide a good environment for the inverter and ensure the inverter's reliable operation. In fact, handling the heat dissipation of the inverter not only requires the designer to do it from the inverter itself, but also requires the user to use it correctly and install it in strict accordance with the instructions to ensure that there is sufficient ventilation space and a suitable use environment, and to do as much as possible. Regular maintenance, especially in dusty industries such as coal, regularly dust the use environment and dust the air duct of the inverter, so that the heat dissipation system of the inverter can perform its normal function and the temperature rise of the inverter is within the allowable value. In order to operate reliably, it will bring greater economic and social benefits to the enterprise. Automobile radiator fan factory is a well-known domestic cooling fan manufacturer, and has a good cooperative relationship with many domestic inverter manufacturers. If you need more information, please contact our company. Contact information of car radiator fan factory Address: Junzi Bulingwu Industrial Road, Guanlan Street, Longhua District, Shenzhen Tel: // Sales: / Fax: Website: Email: market@szhxht.com