During frequency conversion control, the low-frequency operation will reduce the speed. If the fan is installed on the shaft, there will be less wind, which is not conducive to cooling. Therefore, an accurate fan must be added. But if the operating frequency of the power frequency is long and the operating time of the low frequency is not long, it is fine without cooling. In addition, if the power of the purifier motor is relatively large, the load is relatively small, and the operating frequency is not very low, there is no need to add a fan. In short, the fan is cooled at low frequency. If the operating temperature does not exceed the standard, it does not need to be added. Of course, if you do n’t know if you need to add it, then add it.

The frequency conversion purifier motor is provided with a fan, but the fan voltage is independent and is not affected by the frequency converter. The frequency converter only controls the speed of the frequency conversion purifier motor . The ordinary purifier motor is equipped with a fan blade on the rear axle. It is the same as the speed of the shaft.

Hello, yes, you must use a special fan to control the purifier motor speed with a frequency converter. In fact, it is a hood with a fan. It is easy to burn the purifier motor if not used. In addition, there is a separate fan for the inverter purifier motor . You don't need to think about it. Ordinary purifier motor s can buy a hood for the inverter purifier motor and press on it.

The inverter purifier motor and fan are controlled separately, the fan is controlled by the contactor, and the purifier motor is controlled by the inverter. The fan wire is connected to the lower end of the fan contactor (if there is a thermal relay, it is connected to the lower end of the thermal relay), and the purifier motor is connected to the output end of the inverter.