永磁變頻空壓機近兩年來在空壓機行業(yè)成為節(jié)能先鋒的代名詞，甚至有些空壓機廠家以“不用錢買的空壓機”作廣告宣傳詞來吸引用戶的眼球。
Permanent magnet variable frequency air compressors have become synonymous with energy-saving pioneers in the air compressor industry in the past two years. Some air compressor manufacturers even use "air compressors without money" as advertising words to attract the attention of users.
當(dāng)然，永磁電機節(jié)能，相對意義來講，用同樣的控制方法肯定比傳統(tǒng)的異步電機高。節(jié)能的要點是80%的空壓機處于變量負載狀態(tài)，根據(jù)用氣量的多少用變頻調(diào)速來自動滿足用戶的需求，減少無用功的損耗。
Of course, the energy saving of permanent magnet motor is relatively higher than that of traditional asynchronous motor with the same control method. The key point of energy saving is that 80% of the air compressors are in variable load state. According to the amount of gas consumption, frequency conversion speed regulation is used to automatically meet the needs of users and reduce the loss of reactive work.
但還有20%的場合是滿壓滿負載，這種場合采用變頻控制異步電機比直接啟動還要耗能，因為變頻器本身是IGBT以開關(guān)方式控制頻率的高低，它本身有額定功率2～3%需損耗的。
However, 20% of the cases are full voltage and full load. In this case, using frequency conversion to control asynchronous motor consumes more energy than direct starting, because the frequency converter itself is IGBT to control the frequency by switching, and it has 2 ~ 3% of the rated power to be lost.
