螺杆空压机变频和永磁变频的区别

在变频控制的螺杆空压机中，可分为普通变频和永磁变频两种。同样是使用变频器控制，那么两者之间有什么不同呢？效果孰高孰低呢？

In the frequency control of screw air compressor, it can be divided into ordinary frequency conversion and permanent magnet frequency conversion. The same is the use of inverter control, so what is the difference between the two? Which is better or worse?

同样都使用变频器，但永磁变频电机不需要无功励磁电流，可以显着提高功率因数（可达到1，甚容性），减少了定子电流和定子电阻损耗，而且在稳定运行时没有转子铜耗，进而可以减小风扇（小容量电机甚可以去掉风扇）和相应的风摩损耗，效率比同规格普通变频电动机可提高2～8个百分点。

The inverter is also used, but the permanent magnet inverter motor does not need reactive excitation current, which can significantly improve the power factor (up to 1, even capacitive), reduce the stator current and stator resistance loss, and there is no rotor copper loss in stable operation, which can reduce the fan (small capacity motor can even remove the fan) and the corresponding wind friction loss It can be increased by 2-8 percentage points with frequency conversion motor.

而且，永磁变频电机采用的是稀土永磁材料，而普通变频电机则是普通的三相异步电机，永磁变频电动机在25%～120%额定负载范围内均可保持较高的效率和功率因数，使轻载运行时效果更为显着，工作效率高，较同功率的普通变频电机平均要高5%-7%，比普通变频电机要省电。

Moreover, the permanent magnet variable frequency motor uses rare earth permanent magnet materials, while the ordinary variable frequency motor is the ordinary three-phase asynchronous motor. The permanent magnet variable frequency motor can maintain high efficiency and power factor in the range of 25% ~ 120% rated load, which makes the energy-saving effect more significant in light load operation. The work efficiency is high, which is 5% - 7% higher than that of the ordinary variable frequency motor with the same power, which is higher than that of the ordinary variable frequency motor The motor should save energy and electricity.

1、寿命不同。

1. Life span is different.

从机器的使用寿命角度，永磁变频螺杆空压机更好。由于采用变专频器驱动，因此，空压机在启动属的时候，采用的是“软启动”，对于电机有一定的保护作用，减少烧电机的可能性。

From the perspective of the service life of the machine, permanent magnet variable frequency screw air compressor is better. Therefore, the use of "soft starter" is used to reduce the possibility of motor starting.

2、零件不同。

2. The parts are different.

从零件角度看，永磁变频空压机，采用稀土永磁电机，以及变频器。这2个部件，对于空压机的都有很大的帮助。

From the perspective of parts, permanent magnet variable frequency air compressor adopts high efficiency rare earth permanent magnet motor and frequency converter. These two parts are of great help to the energy saving of air compressor.

3、维修成本不同。

3. Maintenance costs are different.

从维修成本角度看，永磁电机无需轴承，不用添加润滑脂，了故障点及降低保养成本。

From the point of view of maintenance cost, permanent magnet motor does not need bearings and grease, which eliminates the fault points and reduces maintenance cost.

另外，永磁变频电机会根据用户端设备的变化，自动调频改变电机功率，很好地匹配电机输出功率，无论是在轻载或过载的情况下其工作效率依然保持在高水平。

In addition, the permanent magnet variable frequency motor will automatically adjust the frequency to change the motor power according to the change of the user equipment, so as to match the motor output power well. Its work efficiency remains at a high level no matter in the case of light load or overload.

维护保养方法：

Maintenance method:

1、每日检查油位、排气温度和排气压力，检查有无异常声音；

1. Daily check the oil level, exhaust temperature and exhaust pressure, check whether there is abnormal sound;

2、每周开机前打开分离器排污阀排放冷凝水，检查各处有无泄漏，检查阀，检查皮带磨损情况(目测)；

2. Open the drain valve of the separator to discharge condensate water before starting the machine every week, check whether there is leakage everywhere, check the safety valve, and check the belt wear (visual inspection);

3、定期检查进气控制阀、小压力阀、电控箱连接线端子、阀、冷却风扇；

3. Regularly check the intake control valve, minimum pressure valve, connecting wire terminal of electric control box, safety valve and cooling fan;

4、定期清洗、清扫冷却器，试验阀可靠性；

4. Clean the cooler regularly and test the reliability of safety valve;

5、定期更换机油过滤器芯、油分离器滤芯、进气过滤器滤芯和润滑油。

5. Regularly replace the oil filter core, oil separator filter element, intake filter element and lubricating oil.