Fans know the dead

Date:2014-12-26 00:00 Source:http://www.caforre.com Click:

　　Fans know the dead:

　　Those factors fan dead? Refers to the so-called dead fan fan placed in accordance with the provisions of the voltage does not start under certain circumstances angle. Test method is to adjust the fan before each pole in turn placed the Hall IC, and then slowly increase the voltage until the start, if the poles in less than a predetermined voltage value before the start, on behalf of qualified, if the level of difference, start voltage exceeds the provisions called dead. Cooling fan

　　Factors affecting the fan start voltage, are:

　　1. Rubber magnet poles magnetized uneven. 2.HALL IC sensor sensitivity bad. 3. rubber magnets magnetized magnetic field is too weak.