The difference between the frequency-based and variable-frequency operation of the air compressor

1. Different functions
Variable frequency of the air compressor means changing the power supply frequency, thereby regulating the load, achieving the effects of reducing power consumption, minimizing losses, and extending the service life of the equipment.
The frequency of industrial power supply refers to the rated frequency adopted by power generation, transmission, transformation and distribution equipment in the power system, as well as industrial and civilian electrical equipment. The unit is Hertz (HZ).
2. Different Impacts
Different frequencies have different effects on various aspects of power grid supply. Generally, the frequency of a country's power grid is fixed, and all manufacturers providing power-using equipment for this country and region must produce equipment according to this frequency to ensure normal operation.
The core of variable frequency technology is the inverter. It achieves automatic adjustment of the motor's operating speed by converting the power supply frequency, changing the fixed 50Hz grid frequency to a variable frequency ranging from 30 to 130 Hz.
3. Different working principles
A power supply device that generates high-frequency alternating current voltage. This device is often used for various alternating high-voltage tests, and can also be used as a DC high-voltage generator, impulse voltage generator, impulse current generator's alternating high-voltage power supply, as well as the excitation power supply of series resonance devices.
It enables the power supply voltage range to reach 142 - 270V, solving the problem of affecting the operation of electrical appliances due to unstable grid voltage. The technology that realizes the control of alternating current by changing the frequency of alternating current is called frequency conversion technology.
4. Air pressure aspect
The variable-frequency screw air compressor takes advantage of the stepless speed regulation feature of the frequency converter. Through the controller or the PID regulator inside the frequency converter, it can start smoothly; for applications with significant fluctuations in gas consumption, it can also respond quickly and adjust rapidly.
5. Startup aspect
The variable frequency drive itself incorporates the functions of a soft starter. The maximum starting current is within 1.2 times the rated current, while the starting current for a conventional frequency drive is generally above 6 times the rated current. Compared with this, the starting impact is very small. This impact not only affects the power grid, but also has a significant reduction on the entire mechanical system.