To calculate the air compressor motor speed to meet a specific airflow, the core principle is the fan similarity law.
Under constant external conditions such as pipeline resistance, airflow is directly proportional to rotational speed. The calculation formula is:
The calculation logic of the combustion fan (combustion-supporting fan) is basically the same as that of the ordinary air compressor fan. The core basis is also the fan similarity law. However, in a combustion system, airflow directly affects the air-fuel ratio and combustion efficiency.
• Verify Motor Capacity: After calculating the speed, confirm that the value is within the motor’s rated speed and the inverter’s operating range.
• Consider Pressure Changes: The law of similarity also states that pressure is proportional to the square of the speed. Significant speed increases may cause motor overload or system overpressure; therefore, the adjustment range should not be too large (generally, exceeding the rated speed is not recommended).
If adjustment is necessary, it is recommended to make gradual fine adjustments in 5-10Hz steps and closely monitor the motor current changes to ensure that it does not exceed the rated current.
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Post time: Feb-18-2026