Do you know several other advantages of permanent magnet variable frequency air compressor?

As we all know, as an important power equipment, air compressor is widely used in machinery, metallurgy, building materials, electronic power, chemical industry, food, textile and other industrial fields. However, air compressors are high-energy-consuming equipment, and power consumption accounts for more than 30% of production power consumption in some industries, so they are commonly known as "dian tigers". Energy saving of permanent magnet variable frequency air compressor is a bright spot. Air compressors with large energy consumption on the market are gradually being replaced or replaced by permanent magnet variable frequency air compressors, which can directly bring 20%-40% cost savings to users.

In addition to energy saving, permanent magnet variable frequency air compressor compared to the power frequency air compressor has the following advantages:

Stable 1. 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; it can quickly adjust the response when the gas consumption fluctuates greatly. Compared with the upper and lower limit switch control of power frequency operation, the pressure stability is improved exponentially.

2. start without impact

Since the inverter itself contains the function of soft starter, the starting current is less than 1.2 times of the rated current, and the power frequency starting is generally 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

The power frequency air compressor can only work in one displacement, and the variable frequency air compressor can work in a relatively wide range of displacement. 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 be automatically dormant, thus greatly reducing the loss of energy. The optimized control strategy can further improve the energy saving effect.

Better voltage adaptability of 4. AC power supply

Due to the over-modulation technology adopted by the inverter, it can still output enough torque to drive the motor when the AC power supply voltage is slightly lower; when the voltage is slightly higher, it will not cause the voltage output to the motor to be on the high side. For self-generating occasions, variable frequency drive can show its advantages. 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

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.