螺桿空壓機變頻和永磁變頻的區(qū)別

在變頻控制的螺桿空壓機中，可分為普通變頻和永磁變頻兩種。同樣是使用變頻器控制，那么兩者之間有什么不同呢？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?

同樣都使用變頻器，但永磁變頻電機不需要無功勵磁電流，可以顯著提高功率因數(shù)（可達到1，甚容性），減少了定子電流和定子電阻損耗，而且在穩(wěn)定運行時沒有轉(zhuǎn)子銅耗，進而可以減小風扇（小容量電機甚可以去掉風扇）和相應(yīng)的風摩損耗，效率比同規(guī)格普通變頻電動機可提高2～8個百分點。

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，永磁變頻電機采用的是稀土永磁材料，而普通變頻電機則是普通的三相異步電機，永磁變頻電動機在25%～120%額定負載范圍內(nèi)均可保持較高的效率和功率因數(shù)，使輕載運行時效果更為顯著，工作效率高，較同功率的普通變頻電機平均要高5%-7%，比普通變頻電機要省電。

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、壽命不同。

1. Life span is different.

從機器的使用壽命角度，永磁變頻螺桿空壓機更好。由于采用變專頻器驅(qū)動，因此，空壓機在啟動屬的時候，采用的是“軟啟動”，對于電機有一定的保護作用，減少燒電機的可能性。

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.

從零件角度看，永磁變頻空壓機，采用稀土永磁電機，以及變頻器。這2個部件，對于空壓機的都有很大的幫助。

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、維修成本不同。

3. Maintenance costs are different.

從維修成本角度看，永磁電機無需軸承，不用添加潤滑脂，了故障點及降低保養(yǎng)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，永磁變頻電機會根據(jù)用戶端設(shè)備的變化，自動調(diào)頻改變電機功率，很好地匹配電機輸出功率，無論是在輕載或過載的情況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.

維護保養(yǎng)方法：

Maintenance method:

1、每日檢查油位、排氣溫度和排氣壓力，檢查有無異常聲音；

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

2、每周開機前打開分離器排污閥排放冷凝水，檢查各處有無泄漏，檢查閥，檢查皮帶磨損情況(目測)；

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、定期檢查進氣控制閥、小壓力閥、電控箱連接線端子、閥、冷卻風扇；

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、清掃冷卻器，試驗閥可靠性；

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

5、定期更換機油過濾器芯、油分離器濾芯、進氣過濾器濾芯和潤滑油。

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