1、 Stable air pressure: 1. As the variable-frequency screw air compressor makes use of the stepless speed regulation feature of the frequency converter, it can be started smoothly through the controller or the PID regulator inside the frequency converter; In case of large fluctuation of gas consumption, it can quickly adjust the response; 2. Compared with the upper and lower limit switch control of power frequency operation, the air pressure stability is improved exponentially

2、 No impact during startup: 1. Since the frequency converter itself has the function of soft starter, the maximum starting current is within 1.2 times of the rated current, and the starting impact is very small compared with the power frequency startup, which is generally above 6 times of the rated current. 2. This kind of impact not only affects the power grid, but also greatly reduces the impact on the entire mechanical system.

3、 Variable flow control: 1. The power frequency driven air compressor can only work at one exhaust volume, while the variable frequency air compressor can work at a wide range of exhaust volumes. The frequency converter controls the exhaust volume by adjusting the motor speed in real time according to the actual gas consumption. 2. When the gas consumption is low, the air compressor can also sleep automatically, which greatly reduces the loss of energy. 3. The optimized control strategy can further improve the energy-saving effect.

4、 The voltage adaptability of AC power supply is better: 1. Due to the over modulation technology adopted by the frequency converter, sufficient torque can be output to drive the motor when the AC power supply voltage is slightly low; When the voltage is slightly high, it will not lead to high voltage output to the motor; 2. For the occasion of self generation, variable frequency drive can show its advantages; 3. According to the characteristics of motor VF (variable frequency air compressor works below rated voltage in energy-saving state), the effect is obvious for the site with low grid voltage. 5、 Low noise: 1. Most working conditions of the frequency conversion system are lower than the rated speed, reducing the mechanical noise and wear of the host, and extending the maintenance and service life; 2. If the fan is also driven by frequency conversion, the noise of the air compressor during operation can be significantly reduced.