Hello
I am looking to motorize a gate in 2 configurations: single swing, 2-leaf accordion
To size the motor and compare the drive modes, I try to determine the torque necessary for the movement of my gate.
My years of study are now far away, I have vague memories but not enough.
Does anyone have in their tablets, the formulas for
- determine the torque to be applied to the pivot (I know there's a J walking around)
- how to determine this J (especially in the case of the accordion)
Thank you
Bonojur,
I found this, if it helps you:
http://calibra-classic.org/pages/powerNTorque.htm
http://ancrobot.free.fr/fiches/pdf/index%283%29.pdf
http://forums.futura-sciences.com/physique/130566-calcul-couple-moteur.html
Hello
You must think of the formula M=J.w' (Moment = Rotational inertia x angular acceleration).
To determine the J (in kg.m^2) of a casement, the simplest way is to multiply the mass (in kg) of your gate by the distance from the pivot to the center of gravity (in m) squared.
That said, opening a gate is usually done at low speed. So with low angular acceleration. The time thus determined will therefore give you only a (small) part of the necessary effort.
You also have to add the torque needed to overcome friction in the pivots. There, it depends on how your system is made (pivot on a pole, wheel at the end, ...)
The badse formula is P=VF
Let the Power (W) = The Speed (M/s) x Force (N)
But in your case, it's the rotational power you need
Either
P = C W
That is, the power = the torque (Nxm) x Angular Velocity (Radian / s)
Of course, you have to be on the same ^th level of gear ratio
And of course take into account a realistic return.