Rotating speed shielding method under fan non-constant rotating speed control mode

A rotating speed shielding method for a fan in a non-constant rotating speed control mode comprises the following steps: firstly, performing segmented arrangement of rotating speed shielding intervals, sequentially identifying whether the fan runs in each running area without static error or not, locking a specific value of the rotating speed of the fan in a certain running area according to the running condition, and inputting a locking value of the rotating speed of the fan as a second control target, the rotating speed shielding function of the motor is realized; according to the rotating speed shielding method for the non-constant rotating speed control mode, when the system needs to use the non-rotating speed control mode, such as a constant power control mode, rotating speed shielding can be conveniently and rapidly achieved. 一种风机非恒转速控制方式下的转速屏蔽方法，先进行转速屏蔽区间的分段排列，依次识别风机在各个运行区是否无静差运行，根据运行情况，锁定风机的转速在某个运行区的特定值，将风机转速的锁定值作为第二控制目标进行输入，实现电机的转速屏蔽功能；通过本发明提供的针对非恒转速控制方式下的转速屏蔽方法，在系统需要使用非转速控制方式时，比如恒功率控制方式，能够方便快捷的实现转速屏