The difference between variable frequency air compressor and industrial frequency air compressor

The difference between variable frequency air compressor and industrial frequency air compressor

The difference between variable frequency air compressor and industrial frequency air compressor:

　　 1. The pressure is stable:

1. Because the frequency conversion screw air compressor uses the stepless speed regulation characteristics of the frequency converter, it can be started smoothly through the controller or the PID regulator inside the frequency converter; it can also be adjusted quickly for occasions with large fluctuations in air consumption. response;

　　2. Compared with the upper and lower limit switch control of power frequency operation, the air pressure stability is improved exponentially

　　 2. Start without shock:

　　 1. Since the frequency converter itself contains the function of a soft starter, the starting current z* is within 1.2 times of the rated current. Compared with the power frequency starting at more than 6 times the rated current, the starting impact is small.

　　2. This impact is not only on the power grid, but also on the entire mechanical system, which is greatly reduced.

　　 Three, variable flow control:

　　 1. The power frequency-driven air compressor can only work at one displacement, and the variable frequency air compressor can work at a relatively wide range of displacement. The frequency converter adjusts the motor speed in real time according to the actual air consumption to control the air displacement.

　　2. When the air consumption is low, the air compressor can be automatically hibernated, which greatly reduces the energy loss. 3. The optimized control strategy can further improve the energy saving effect.

　　 Fourth, the AC power supply has better voltage adaptability:

　　1. Due to the over-modulation technology adopted by the frequency converter, it can still output enough torque to drive the motor when the AC power voltage is slightly lower; when the voltage is higher, it will not cause the output voltage to the motor to be higher;

　　 2. For the occasion of self-generation, variable frequency drive can show its advantages;

　　3. According to the characteristics of the motor VF (variable frequency air compressors work below the rated voltage in an energy-saving state), the effect is obvious for sites with low grid voltage.

　　 5. Low noise:

　　1. Most of the working conditions of the frequency conversion system work at lower than the rated speed, the main machine's mechanical noise and wear are reduced, and the maintenance and service life are extended;

　　2. If the fan is also driven by frequency conversion, it can significantly reduce the noise of the air compressor.

　　The difference between frequency conversion and industrial frequency is obvious. The energy-saving and efficiency advantages of permanent magnet frequency conversion air compressors are necessary means to win the market.