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zaveri
zaveri • Apr 2, 2012

torque of fan

what is the practical procedure to determine the torque of a fan at different speeds, and to hence draw its speed-torque curve.
CE Designer
CE Designer • Apr 2, 2012
Interesting question, do you have product specs? Can you check the power rating of the fan?
zaveri
zaveri • Apr 3, 2012
CE Designer
Interesting question, do you have product specs? Can you check the power rating of the fan?
i have nothing as such, this is just a general question.

actually i came across a text book called "Design of machine components" by Michael Orthwein. this book also contains a section devoted to the selection of electric motors, for particular applications. it then showed an example of how a dc motor was selected for a fan by superimposing the speed-torque curve of a fan (driven machine) on the speed-torque curve of the motor. thus the points of intersection of the curves would give the starting torque required to start the fan.

now what i really wanted to know was , how is the speed-torque of the fan drawn even prior to selecting its drive
CE Designer
CE Designer • Apr 4, 2012
It is derive from the power

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