Like fans, motors and pumps, permanent magnet variable frequency air compressors save power by controlling the input voltage frequency according to load changes, which can keep parameters such as pressure, flow rate and temperature stable, thus greatly improving the working performance of the compressor.

What is the working principle of permanent magnet inverter air compressor? Let's all take a brief look below.

Since the motor speed of permanent magnet inverter air compressor has a linear relationship with the actual power consumption of the air compressor, reducing the motor speed will reduce the actual power consumption. Inverter air compressors use pressure sensors to instantly sense the actual air pressure and gas consumption in the system. The accurate coordination of electrical control and frequency control allows instant control of motor speed without changing the motor torque of the air compressor. By changing the compressor speed, it is possible to respond to changes in system pressure and maintain a stable system pressure, thus achieving on-demand output of high-quality compressed air.

When the amount of air consumed by the system decreases, the compressed air provided by the permanent magnet inverter air compressor is greater than the amount consumed by the system, so the inverter compressor reduces the speed and outputs the compressed air volume. Conversely, the motor running speed is increased to increase the compressed air volume to maintain a stable system pressure value. Like fans, motors and pumps, permanent magnet variable frequency air compressors control the input voltage frequency according to the load change, and the energy saving effect is the same as variable frequency drives as follows.

1. The pressure setting of permanent magnet variable frequency air compressor can be one point, i.e. the pressure that meets the requirements of production equipment can be used as the setting pressure, and the permanent magnet variable frequency air compressor will adjust the speed of the air compressor according to the fluctuation trend of the pipe network pressure, even eliminating the unloading operation of the air compressor to save power.

2. Since the permanent magnet variable frequency air compressor makes the pressure above and below the pipe network stable, it can reduce or even eliminate the pressure fluctuation, so that all air compressors running in the system operate at a lower pressure to meet the production requirements, thus reducing the power loss caused by the upward pressure fluctuation.

3. Since permanent magnet variable frequency air compressor cannot exclude the possibility of running at full load for a long time, the capacity of the motor can only be determined according to the demand, so the design capacity is generally on the large side, and in actual operation, the proportion of light load running time is high. If frequency conversion speed control is adopted, it can greatly improve the efficiency during operation. Therefore, it has great potential for energy saving.

4. some adjustment methods, even if the demand is very small can not reduce the motor operating power. When the demand is small, the speed of the motor can be reduced to reduce the operating power of the motor, thus achieving further energy saving.

5. Most single-motor drive systems cannot be continuously adjusted according to the load. However, with the use of variable frequency speed regulation, the permanent magnet variable frequency air compressor can be adjusted continuously very easily to maintain the stability of pressure, flow rate, temperature and other parameters, thus greatly improving the working performance of the compressor.