#FANCONTROL FAN1 NEW FANCONTROL FULL#

This is provided either through a table of data points or a graph that shows the relationship. This can result in excessive acoustic noise and higher power consumption.įan manufacturers specify how the PWM duty-cycle relates to nominal fan speed. To guarantee a fan will run at the desired speed, system designers need to run the fans at speeds 20% higher than nominal to ensure that any fan from that manufacturer provides sufficient cooling.

#FANCONTROL FAN1 NEW FANCONTROL FULL#

This also extends the operating life of the fan compared to systems that run all fans at full speed all of the time.įan manufacturers specify the duty cycle to RPM relationship in their datasheets, with tolerances as high as ± 20%. To manage acoustic noise generation, the fan controller can be configured to drive fans at the minimum possible speed, simultaneously maintaining safe operating temperature limits. Smaller fans need to run at a higher speed than larger fans to move the same volume of air in a given time.Īpplications that are space constrained and need smaller fans due to physical dimension limitations generate significantly more acoustic noise. The size, shape, and pitch of the fan blades all contribute to the fan’s capacity to move air.

This is specified either as cubic feet per minute (CFM) or cubic meters per minute (m3/min). The most important specification when selecting a fan for a cooling application is how much air the fan can move. Fans come in standard sizes 40 mm, 80 mm, and 120 mm are common.

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