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From: Yaroslav on 3 Jul 2010 12:24
Hello all,

I am confused with the Damping Coefficient of a motor, please help.
There are different Damping Coefficients, and they seem not to be the same as the speed-torque curve ?
According to this : http://www.smma.org/PDFs/SMMA_motor_glossary.pdf

Anyhow, the motor I have is the 3257024CR by Faulhaber. The datasheet gives the n-M slope, which can be converted to the same units as the damping. Therefore I would assume that n-M slope is the Frictional Damping Coefficient (Kf). Am I right?
Is Kf is the same as the Damping Coefficient which is used in the DC Motor, SimElectronics?

Somehow it seems strange, because the numbers I get after conversions (0.000876Nm/Rad/s) are a number of magnitudes higher than the default value(1e-08Nm/Rad/s).

Any thoughts ?

Thank you,
ya.
From: Akos on 10 Jul 2010 09:43
Hi!

I am working on a robot project, and using faulhaber motors. I've started modeling the motor in simulink, but i dont know how to calculate the damping ratio. Can you help me?

Thanks a lot!

"Yaroslav " <none(a)none.com> wrote in message <i0no73$g2a$1(a)fred.mathworks.com>...
> Hello all,
>
> I am confused with the Damping Coefficient of a motor, please help.
> There are different Damping Coefficients, and they seem not to be the same as the speed-torque curve ?
> According to this : http://www.smma.org/PDFs/SMMA_motor_glossary.pdf
>
> Anyhow, the motor I have is the 3257024CR by Faulhaber. The datasheet gives the n-M slope, which can be converted to the same units as the damping. Therefore I would assume that n-M slope is the Frictional Damping Coefficient (Kf). Am I right?
> Is Kf is the same as the Damping Coefficient which is used in the DC Motor, SimElectronics?
>
> Somehow it seems strange, because the numbers I get after conversions (0.000876Nm/Rad/s) are a number of magnitudes higher than the default value(1e-08Nm/Rad/s).
>
> Any thoughts ?
>
> Thank you,
> ya.
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