Example: Finding Motor Constants

[@mehmetkilic9518]

For additional information, Kt x Kb = 1. So you do not need to calculate each parameter. Also, please keep in mind these parameters varies a lot with temperature. Under room conditions everything is okey. However when the temperature deviates from the nominal point, thing are getting changed. Think like an experiment about heating up a magnet. Its strength will decrease! For more information check motor production companies documents. for example Maxon, Faulhaber, Ingenia etc.

[@markjohnmears]

Nice video. Good explanation. Thank you! However, I’m confused regarding the KT and Kb values calculated. Were these just example values to demonstrate the process? I ask because the Kb and Kt values you calculated turn out to be inverses, and there is a comment from mehmetkilic9518 stating that Kb and Kt are inverses (Kb x Kt = 1). There are a number of references that indicate that the motor torque constant and the back-emf constant are supposed to be equal when in SI units … Kt (N-m/Amp) is equal to Kb (Volt-sec/rad) and that this can be shown using Power-in and Power-out equations. The RPM per Volt constant (Kv) that is often listed for dc motors, when written in units of rad/Volt-sec, is nearly the inverse of Kt or Kb (with a small correction for the reduction in voltage from the no-load current times the motor resistance). Were your numbers taken for a real motor data sheet? Any thoughts?

[@rainasajid6678]

Thank you so much!

[@donpkchannel7203]

Kb= is the back EMF constant? and Kt the torque constant?

[@theryderproject5053]

Yes

[@avi19921000]

What is R? Is it an external resistance or the armature resistance to the motor?????? Please reply asap.

[@EM_303]

Armature

[@TopChannel-gj7cc]

Thanks

[@tharushagimhan1467]

How to find frequency and damping coefficient

[@theryderproject5053]

You would need to develop the transfer function describing the system and then analyse that.

[@hussain55019]

First like and first comment,,good video