Why is the frequency conversion screw air compressor better than the power frequency air compressor?

Permanent magnet variable frequency air compressor has been widely used in industry, and it can not help but remind people of the power frequency driven air compressor. Throughout the market, the power frequency driven air compressor has gradually withdrawn from people's attention, replaced by permanent magnet frequency conversion air compressor, so what is the difference between the two, why permanent magnet frequency conversion air compressor will be welcomed by the market?

1. pressure stability:

1, due to the frequency conversion of the screw air compressor using the frequency converter of the characteristics of the stepless speed regulation, through the controller or inverter internal PID regulator, can start smoothly; on the occasion of large fluctuations in gas consumption, and can quickly adjust the response;

2. Compared with the upper and lower limit switch control of power frequency operation, the stability of air pressure is improved exponentially.

2. start without impact:

1. As the frequency converter itself contains the function of soft starter, the maximum starting current is within 1.2 times of the rated current. Compared with the power frequency starting at more than 6 times of the rated current, the starting impact is very small.

This impact is not only on the power grid, but also on the entire mechanical system.

3. variable flow control:

1. The air compressor driven by power frequency can only work in one exhaust volume, and the variable frequency air compressor can work in a relatively wide range of exhaust volume. The frequency converter is based on the actual gas consumption to adjust the motor speed in real time to control the displacement.

When the air consumption is low, the air compressor can also be automatically dormant, thus greatly reducing the loss of energy.

The optimized control strategy can further improve the energy saving effect.

4. AC power supply voltage adaptability is better:

1. Due to the over-modulation technology adopted by the frequency converter, sufficient torque can still be output when the AC power supply voltage is slightly lower to drive the motor to work; when the voltage is slightly higher, it will not cause the voltage output to the motor to be on the high side;

2. For self-generating occasions, variable frequency drive can show its advantages;

3. According to the characteristics of the motor VF (the variable frequency air compressor works below the rated voltage in the energy-saving state), the effect is obvious for the field with low grid voltage.

Low 5. noise:

1. Most of the working conditions of the frequency conversion system are lower than the rated speed, and the mechanical noise and wear of the host are reduced, which prolongs the maintenance and service life;

2. If the fan also adopts variable frequency drive, the noise of the air compressor can be significantly reduced.

The difference between frequency conversion and power frequency is obvious. The energy saving advantage and efficiency advantage of permanent magnet frequency conversion air compressor are the necessary means to win the market.