Power frequency air compressor which is good

When Xiao Chen purchased the screw air compressor for the company, he hesitated between "power frequency air compressor" and "frequency conversion air compressor" because Xiao Chen did not know the difference between the two.

According to Xiao Chen's description, Xiao Shen of Shanghai granklin group recommended "power frequency air compressor" to Xiao Chen. why not recommend "permanent magnet frequency air compressor" and mainly push "power frequency air compressor?

Xiao Chen's company uses a large amount of gas and needs several air compressors to be used together. The purchase cost of all "permanent magnet variable frequency air compressors" is relatively high, which does not meet the budget of Xiao Chen's company. Not every enterprise can do without budget. Therefore, we need to use the plan according to the actual situation.

Finally, we recommend using two "power frequency air compressors" and one "permanent magnet frequency conversion air compressor" according to the gas consumption. This matching method can save the purchasing cost for Xiao Chen's enterprise as much as possible.

we first need to understand the permanent magnet variable frequency air compressor and power frequency air compressor is different to know how to choose:

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 starting current is larger within 1.2 times of the rated current, and the power frequency starting is generally more than 6 times of the rated current, and 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.