PLC 与变频器组合构成自动控制系统实现对锅炉风机的控制。本文根据燃气锅炉风机的控制要求,给出控制系统的组成、控制原理、系统控制流程,比较了风机挡板控制与变速控制的节能效果。 关键词: PLC 锅炉风机 控制 Abstract: PLC with VVVF combine the automatic control in composing system realizes to the control of the boiler breeze machine. This text requests according to the control of the boiler breeze machine, giving the control the system constitute, control principle, system control process, compare the breeze machine blocks the plank control with become soon the economy energy result that control. Key words: PLC Boiler Breeze machine Control