In view of the fan energy saving problem,this paper adopts the experiment system of the mine main fans developed by the researchers,and determines that the K45 -4 -№9 /18.5kW axial flow fan performance parameters of main fan under frequency and power frequency is 50 Hz.It uses the software analysis of experimental data and drawing fan performance curve.Results show that the main fan in the frequency conversion 100% and power frequency in both cases run is broadly in line with a fan performance curve;frequency conversion 100% air volume and air pressure curve at runtime is bigger than runtime power frequency curve fluctuations,illustrate air pressure of frequency conversion 100% is more susceptible to the influence of the air;under the condition of large air volume,it runs the power frequency relative to the frequency conversion 100% energy -saving operation,the biggest power saving rata reaches 3.756%;power frequency efficiency is higher than the efficiency of the frequency conversion 100%,and the maximum efficiency of the difference is between the value of 2.93%.%针对通风机节能的问题，利用自主研发的矿用通风机实验平台，测定了 K45－4－№9／18．5kW 型轴流主通风机在变频和工频频率均为50 Hz 下的风机性能参数．利用软件分析实验数据并绘制风机性能曲线，结果表明：主通风机在变频100％和工频2种情况下运行的风机性能曲线变化大体一致；变频100％运行时的风量、风压曲线比工频运行时的风量、风压曲线波动大，说明变频100％运行时风压更容易受风量的影响；在大风量情况下，工频运行相对于变频100％运行节能，最大节电率达到3．756％；工频运行时的效率高于变频100％运行时的效率，且两者的最大效率值相差2．93％．
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