Economical inverter: As a conversion device, the economical inverter of the motor will generate a certain amount of power consumption during operation. This part of the power consumption will vary according to different loads, different control modes, and different brands and specifications of the economical inverter. Data shows that the power consumption of the economical inverter is about 4-5% of its capacity. Among them, the inverter part accounts for about 50%, the rectifier and DC circuit account for about 40%, and the control and protection circuit accounts for about 5-15%. The 10℃ rule shows that when the temperature of the equipment is reduced by 10℃, the reliability of the equipment will double. It can be seen how important the economical inverter is to reduce the temperature rise of the equipment, improve the reliability of the equipment, extend the service life of the equipment, and better serve the society.

The heat dissipation of economical inverters is divided into natural heat dissipation, forced air cooling and water cooling.

Natural heat dissipation:

Small-capacity economical inverters generally use natural heat dissipation, and the use environment should be well ventilated, dust-free, and free of floating objects that are easy to adhere. The driving objects of this economical inverter are mainly air-conditioning fans, machine tool engraving machines, etc., with low power and good use environment.

In addition, the capacitance of economical inverters with natural heat dissipation is not always small. For low-capacity inverters, a general radiator can be selected, and the heat dissipation area is required to be expanded as much as possible within the allowable range, and the radiator spacing should be small to increase the heat dissipation area as much as possible. For large-capacity economical inverters, if natural heat dissipation is required, it is recommended to use a heat pipe radiator. The heat pipe radiator is a new generation of radiators. It is the product of the combination of heat pipe technology and radiator technology. It has high heat dissipation efficiency.

Forced air cooling:

Forced air cooling refers to a method of directly cooling the device housing through one or more external fans. Because the inverter will inevitably generate more heat when working, especially when it runs at full load for a long time and the ambient temperature is too high. Therefore, in order to prevent the inverter from overheating seriously, we can also add one or more fans to directly cool the inverter housing. This cooling method is low cost. At the same time, without considering the cost, the number of fans can be increased at will to enhance the cooling effect.

Water Cooling:

Water cooling has water inlet and outlet, and there are multiple water channels inside the radiator, which can give full play to the advantages of water cooling and take away more heat. This is the basic principle of water-cooled radiators. Water cooling is a common industrial cooling method, but for frequency conversion equipment, it is rarely used for heat dissipation due to its high cost and large size. In addition, the capacity of ordinary frequency converters ranges from several thousand volt-amperes to nearly 100 kVA, which is unacceptable to users. This method is only suitable for special occasions and large-capacity frequency converters.

Regardless of the cooling method, the power consumption should be determined according to the capacity of the motor inverter, and the appropriate fan and radiator should be selected to achieve excellent cost performance. At the same time, the environmental factors used in the inverter should be fully considered. For harsh environments (high temperature, high humidity, coal mines, oil fields, offshore platforms), corresponding measures must be taken to ensure the normal and reliable operation of the inverter. From the perspective of the inverter itself, the influence of adverse factors should be avoided as much as possible.