In recent years,with the progress of technology and the needs of the market,the air compressor industry is also in constant innovation and development.The development of air compressor has been from the initial piston air compressor,to power frequency screw air compressor,ordinary variable frequency screw air compressor,and now to two-stage compressor screw machine and PM VSD air compressor.PM VSD air compressor has become the mainstream product in the market.Many users begin to use PM VSD air compressor to replace the original power frequency air compressor.Why is it more and more popular?

1.More energy saving

Under the condition of full load,the permanent magnet motor of PM VSD air compressor can produce the maximum air volume with the minimum energy consumption;When the load rate of the PM VSD air compressor is lower than 20%,the operating efficiency is always as high as 95%,reaching the first level of energy efficiency.Compared with the power frequency screw air compressor,it can save more than 30% of energy and save more than 10000 yuan of electricity for the enterprise in a year.

2. Stable air pressure

Because the PM VSD screw machine uses the stepless speed regulation of the frequency converter,it can start smoothly through the controller or PID regulator inside the converter.The response can also be adjusted quickly in the case of large fluctuation of gas consumption.Compared with the upper and lower limit switch control of power frequency operation,the air pressure stability is improved exponentially.

3. No impact on start

Since the inverter itself contains the function of soft starter,the maximum starting current is within 1.2 times of rated current.Compared with the power frequency starting generally at more than 6 times of rated current,the starting impact is very small,not only for the power grid,but also for the whole mechanical system,and also greatly reduced,which greatly improves the service life of the air compressor.

4.Variable flow control

The air compressor driven by power frequency can only work in one exhaust volume,and the PM VSD air compressor can work in a wide range of exhaust volume.The inverter adjusts the motor speed in real time according to the actual air consumption to control the exhaust volume.When the gas consumption is low,the air compressor can automatically sleep,which greatly reduces the loss of energy.

5. Low noise

Most working conditions of PM VSD air compressor system are lower than rated speed,and the mechanical noise and wear of main engine decrease,and the maintenance and service life are prolonged.The fan also adopts frequency conversion drive,which can significantly reduce the noise of the air compressor.

In conclusion, the difference between PM VSD air compressor and power frequency air compressor is obvious. The PM VSD air compressor is more stable,more energy-saving and power saving,which is also the reason why the it is so hot and popular at present.