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Method for defining the life of DC fans
Date：2020/4/17 Views：1499 【BACK】
DC Fan product parameters including operating current, speed, temperature rise and noise, must be measured and recorded before the start of the life test. Then the life test can start, and record the start date, life test prototype must be daily inspection or at least twice a week inspection, the following parameters are set as the failure criteria: A, speed reduced to 30% of the original speed. B, B current ratio rating increased by 30% . C. D. C. Fan stop running. D. Any noise due to deformation of the frame, or any other abnormal noise, of course the actual DB value of the noise will not be tested at this time. When the failure of the DC fan is found, the final test result must be recorded. When the failed DC fan sample is removed from the high temperature, it must be carefully examined and analyzed to find out the real cause of the failure of the fan, while the other two DC continue to be tested until failure. The average life of a DC fan is calculated based on the following acceleration factor: The formula is: Life = 1.65 ^ (Ttest-T) / 10) , that is, when the working environment temperature decreases 10 °C, the product life increases 1.65 times. For example, based on the life test data of our DC fan samples, for every 12% increase in speed, the life is reduced by 25% . Note that the maximum life of ordinary bearings is 150000 H, the reason is the bearing life limit (bearing fatigue) . The above is the DC fan life definition method introduced by Dong Xing Yue, if you want to know more DC FAN knowledge can click:http://www.dxymotors.com
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