Application Research of A Control Method for DC Variable Frequency Range Hood
At present,the common control method of DC variable frequency range hood is to calibrate the current-speed air volume curve of the smoke machine under different back pressure according to the maximum air volume and maximum static pressure requirements,and realize the adaptive control of air volume and static pressure under different air duct resistance by invoking the air volume curve.But for the new national standard put forward the new indicators of noise limit requirements,it can not meet.Noise control requires that the speed of the motor under a specific back pres-sure cannot be too high,which breaks the monotony of the original current-speed curve.After adding the noise require-ment,the air volume data is the current V-shaped data,and the speed is the incremental data.If the original control strategy continues to be used,it is easy to cause problems such as power oscillation and air volume instability in the smoke machine,resulting in poor user experience.Based on solving the above problems,this paper carries out the appli-cation research of the new control method of DC variable frequency range hood.Through the optimization of the original control strategy and application experiment verification.Effectively solve the problems of power oscillation and air vol-ume instability caused by current and speed mismatch in the prior art,and improve the accuracy of smoke control under the premise of meeting the working noise requirements of the new national standard.
DC variable frequency range hoodcontrol methodworking noiseoscillation
万方数据
维普
