​What is the correct method for starting a high-temperature resistant stainless steel centrifugal fan?

High-temperature resistant stainless steel centrifugal fans are equipped with standard motors that start using frequency converters at a fixed frequency. This method is suitable for operating conditions where frequent flow adjustments are not required when using the fan. During startup, the motor is first started at a low frequency. If the intake air temperature of the high-temperature resistant stainless steel centrifugal fan rises, increasing the motor frequency will not cause the motor to overload. With the widespread adoption of frequency converters, shock absorbers have become secondary. While using a frequency converter increases initial purchase costs, it provides excellent motor protection. During commissioning, airflow can be freely adjusted, facilitating system-wide debugging. However, the adjustment range is limited to 40-50Hz. This is an economical and straightforward method for starting high-temperature resistant stainless steel centrifugal fans. After the fan starts, the damper must be closed. Once the high-temperature resistant stainless steel centrifugal fan reaches rated speed, the damper should be gradually opened. Since the medium temperature rises until the damper is fully open, note that the design parameters for the high-temperature fan and auxiliary motor are based on high temperatures. However, during the initial operation phase of the high-temperature stainless steel centrifugal fan, the ductwork typically contains air at room temperature with higher molecular density. Due to the greater mass per unit volume, the fan experiences significant initial load. The damper not only regulates airflow but also prevents overcurrent. Equipped with a variable frequency motor, it initiates frequency conversion operation. This approach features high initial procurement costs but low operational expenses. Suitable for high-temperature resistant stainless steel centrifugal fans requiring airflow adjustment. The adjustment range spans 0 to 60 Hz. Some customers design systems requiring over 10 daily fan starts. This inevitably subjects low-frequency motors to severe stress. Typically, excessive starting currents accelerate insulation degradation, significantly shortening motor lifespan. Variable frequency motors eliminate these drawbacks. Each of the three starting methods for high-temperature resistant stainless steel centrifugal fans has distinct advantages and disadvantages. Users can make rational choices based on economic cost projections.