First, permanent magnet Shanghai Rotorcomp VSD air compressor pressure stability:
1. Because the permanent magnet variable frequency screw air compressor utilizes the stepless speed regulation feature of the frequency converter, it can be started gently by the PID regulator inside the controller or inverter; and it can be quickly adjusted for occasions with large fluctuations in gas consumption. response;
2. Compared with the upper and lower limit switch control of the power frequency operation, the pressure stability is improved exponentially.
Second, the permanent magnet frequency conversion air compressor started without impact:
1. Since the inverter itself contains the function of a soft starter, the starting current is at most 1.2 times of the rated current, and the start-up shock is very small compared with the normal frequency starting at more than 6 times of the rated current.
2, this impact is not only on the grid, the impact on the entire mechanical system, but also greatly reduced.
Third, the permanent magnet variable frequency air compressor variable flow control:
1, the frequency driven air compressor can only work in a displacement, variable frequency screw air compressor can work in a wider range of displacement. The frequency converter controls the displacement by adjusting the motor speed in real time according to the actual gas consumption.
2, when the gas volume is low, the screw air compressor can also be automatically dormant, which greatly reduces the energy loss.
3. The optimized control strategy can further improve the energy-saving effect.
Fourth, the permanent magnet frequency conversion air compressor AC voltage better adaptability:
1, due to the over-modulation technology used in the inverter, when the AC power supply voltage is slightly lower, it can still output enough torque to drive the motor; when the voltage is slightly higher, it will not lead to the high voltage output to the motor;
2. For self-generating applications, variable-frequency drives can better show their advantages;
3, according to the characteristics of the motor VF (frequency compressor in the energy-saving state are working below the rated voltage), for the grid voltage is low, the effect is obvious.
Fifth, the permanent magnet frequency conversion air compressor noise is low:
1. Most of the operating conditions of the frequency conversion system are working under the rated speed, the mechanical noise and wear of the main engine is reduced, and maintenance and service life are extended;
2. If the fan is also driven by a variable frequency drive, it can significantly reduce the noise during operation of the air compressor.
The difference between frequency conversion and normal compressor is obvious. The energy saving advantages and efficiency advantages of permanent magnet variable frequency screw air compressors are necessary means to win the market.