Can the tolerance of the DC cooling fan be reduced?

Some products have high requirements for the consistency of the speed of the cooling fan, especially for some instruments and equipment, different speed output may allow the instrument to obtain different data, so the speed of the cooling fan is required to be stable and consistent. A small-sized cooling fan The speed tolerance is 20%-30%, and the speed tolerance of large-size cooling fans is about 10%. Often, the micro fans that require extremely high speed tolerances, but because of the extremely small motors, the copper wires are also very thin and extremely thin. The resistance tolerance of the motor wound by the copper wire is also larger, and it is more sensitive to the influence of high temperature after being energized, and the resistance tolerance is large, which causes the tolerance of the miniature cooling fan to be larger. The cooling fan manufacturer adopts the method of circuit control, so that the rotation speed tolerance of the running micro fan is always within the range of 2%-5%, and the air volume is balanced. Not only the single wind speed is the same, the speed of the entire batch is almost the same. You are welcome to visit the cooling fan manufacturer again Cooling classroom and news center, the copyright belongs to the cooling fan manufacturer, and only represents personal views, please do not reprint the whole article, violations will be held legally responsible, if you need to know more about the cooling fan manufacturer's product introduction, please click Product Center