Axial flow fans have a wide range of applications. They are a type of fan where the airflow direction is the same as the fan blade axis, such as electric fans and air conditioner outdoor unit fans. They are called "axial flow" because the gas flows parallel to the fan axis.
When starting an axial flow fan, the motor current is 5-6 times higher than the rated current, which not only affects the motor's lifespan but also consumes more electricity. While the system design includes a certain margin in motor selection, and the motor speed is fixed, in actual use, sometimes lower or higher speeds are required. Therefore, frequency converter retrofitting is essential. Frequency converters can achieve soft starting of the motor, achieve energy-saving speed regulation by changing the frequency of the equipment's input voltage, and provide overcurrent, overvoltage, and overload protection functions.
