【 Auto cooling fan 】 Speed problem, it is worth pondering!
speed is refers to the number of the fan blade rotation per minute, the unit is the RPM. Fan speed by the motor coil number of turns, working voltage, the number of the fan blade, Angle and height, diameter, and bearing system common decision. Speed and quality of the fan not necessarily linked. The speed of the fan can be internal speed signal measurement, but can be by external measurements.
as the application situation and the change of environmental temperature, sometimes need a different fan speed to meet demand. Some vendors specially designed adjustable fan speed of cooling fan, move and break up two automatically. Mainly is to let users can manually using low speed to obtain low noise in the winter, summer with high speed to obtain good heat dissipation effect. Automatic temperature radiator with a temperature sensor, according to the current working temperature automatic control fan speed, high temperature, improve the speed, low temperature, reduce the speed, in order to achieve a dynamic balance, and keep the wind noise and heat dissipation effect a zui combining site.
the relevant recommendation: automobile cooling fans, http:///products- 细节。 asp吗? cpid = 91