Permanent magnet variable frequency air compressor advantages and disadvantages

1. permanent magnet variable frequency air compressor advantages introduction:

1. Stable air pressure

because the variable frequency screw air compressor uses the stepless speed regulation characteristics of the frequency converter, it 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.

2. Variable flow control

the power frequency driven air compressor 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 gas consumption is low, the air compressor can also be automatically dormant, thus greatly reducing the loss of energy.

3. Start without impact

since the frequency converter itself includes the function of a soft starter, the starting current * * * is within 1.2 times of the rated current, which is very small compared with the power frequency starting, which is generally more than 6 times of the rated current. This impact is not only on the power grid, but also on the entire mechanical system.

4. Low noise

most of the working conditions of the frequency conversion system are lower than the rated speed, and the mechanical noise and wear of the main engine are reduced, which prolongs the maintenance and service life. If the fan is also driven by variable frequency, the noise of the air compressor can be significantly reduced.

5. The voltage adaptability of AC power supply is better

due to the over-modulation technology used by the inverter, it can still output sufficient torque to drive the motor when the AC power supply voltage is slightly lower. If the voltage is slightly higher, it will not cause the voltage output to the motor to be higher. For self-generating occasions, variable frequency drive can show its advantages.

So as mentioned above, the permanent magnet variable frequency screw air compressor is really so "* * *"? Obviously not, let's take a look at the shortcomings of the permanent magnet variable frequency air compressor.

2. permanent magnet variable frequency air compressor shortcomings:

although the variable frequency air compressor is good, but because of its own composition principle, the user also has to bear certain risks in the process of using the permanent magnet variable frequency air compressor. Among them, the risk of * * * is degaussing caused by high temperature. We all know that permanent magnet motor in the element is magnetic steel, and magnetic steel is most afraid of high temperature. The permanent magnet variable frequency air compressor will gradually demagnetize under high temperature for a long time. The higher the temperature, the greater the risk of demagnetization.

There are many cases of permanent magnet air compressor function failure caused by magnetic steel demagnetization when using permanent magnet air compressor in various industries. Once the permanent magnet air compressor is demagnetized, the current of the motor will continue to increase after partial demagnetization, and the energy consumption will rise, which will increase the electricity cost of users. At the same time, there is the possibility of "* * *" of the motor at any time, which may seriously lead to scrapping the finished products of products.