How to see whether the screw air compressor is frequency conversion type

The simplest point is to see whether it contains a frequency converter, and the second is to see whether the motor changes its speed according to the actual working conditions during operation. There are many factors to look. Speed directly affects the oil pressure and high and low pressure. I can see whether there is frequency conversion in the current or something.

Literally understood, the speed of the variable frequency air compressor is almost the same as the fixed frequency under the working state. When the air compressor is not in the pumping state, the motor frequency will automatically drop and the input power will be reduced to achieve the effect of energy saving.

The motor in the variable frequency air compressor can help the variable frequency air compressor to start smoothly, greatly reducing the impact of external current. Now because the country advocates energy conservation and environmental protection.

Air compressor-frequency conversion screw air compressor

1. start without impact:

the inverter itself contains the function of a soft starter. The maximum starting current is within 1.2 times of the rated current, while 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.

Low 2. noise:

most of the working conditions of the frequency conversion system are lower than the rated speed, the main machine mechanical noise and wear are reduced, and the maintenance and service life are extended;

3. pressure stability:

the variable frequency screw air compressor uses the stepless speed regulation characteristics of the frequency converter, and can start smoothly through the controller or the PID regulator inside the frequency converter. For occasions with large fluctuations in gas consumption, it can quickly adjust the response;

4. AC power supply voltage adaptability is better:

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

2. Due to the over-modulation technology adopted by the inverter, 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;

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.

5. variable flow control:

the frequency converter is based on the actual gas consumption to adjust the motor speed in real time to control the displacement. Therefore, the variable frequency air compressor can work in a relatively wide range of exhaust volume.