What Is the General Frequency of Air Compressor

Operating frequency of air compressor: Difference between power frequency and frequency conversion

the “frequency” of air compressor usually refers to its drive motor power frequency or the control frequency output by frequency converter. In our country, the standard power frequency of the power grid is50Hztherefore, the rated speed of the motor of the traditional constant speed air compressor (power frequency machine) corresponds to 50Hz operation.

Frequency adjustment range of variable frequency air compressor

variable Frequency air compressor adjusts the motor speed through frequency converter, and the common frequency adjustment range is0–50Hz(Some models support 0-60Hz or wider, such as 30- 70Hz), the actual operation is mostly in20–50Hzthe interval is dynamically adjusted to match the gas demand and achieve energy saving.

Key factors affecting frequency selection

• grid standard: 50Hz in China, and 60Hz for export models (such as North America and Japan)
• design of electrical motor: variable frequency motor needs to support wide-frequency operation, and ordinary motor is prone to overheating due to long-term low frequency
• system matching: the frequency change directly affects the exhaust pressure and flow, and needs to cooperate with the gas tank and pipe network.

Note: The air compressor itself has no concept of “natural frequency”; The so-called “frequency” is actually the driving parameter of the motor, not the vibration or acoustic frequency of the equipment. The selection should be based on actual working conditions and energy efficiency targets, and the manufacturer’s technical manual should be preferred.