At present, in the textile profession, still had many enterprises to use the polarity reversal the method to carry on the velocity modulation as before to the air blower, not only its adjusts the flexibility to be bad, moreover the power consumption is also big. This article is in the traditional air blower velocity modulation foundation, the use frequency conversion velocity modulation technology, carries on the speed control using frequency changer's multistage fast function to the air blower. Narrated specifically gives the signal with the temperature sensor to control frequency changer's frequency through PLC to realize to the air blower speed regulating control, reduced the energy loss, enhanced system's stability and the flexibility.
key word: Frequency changer PLC Multistage fast Energy conservation
