DC Motor Simulation on Simulink Using Datasheet's Specifications.

Hello everyone,

I am trying to implement a dc motor simulation on simulink using real dc motor's specifications. Bellow there is the model which I am using, and after that you can see the motor's specifications (can be found here 290-008_ig220053x00085r_ds-784454.pdf (mouser.com))

I must find these specifications,

(J) moment of inertia of the rotor

(b) motor viscous friction constant

(Ke) electromotive force constant

(Kt) motor torque constant

(R) electric resistance

(L) electric inductance

I did some calculations using datasheet's info.

Using torque constant I found that Kt=0.22246Nm/A.

Using voltage constant I found that Ke=1.3002V/(rad/sec)

Datasheet says that electric resistance is R = 3.33 Ohm, and I guess that electric inductance should be negligible, because it cannot be found.

My question is, how can I compute moment of inertia of the rotor and motor viscous friction constant using the specifications bellow?

Thank you so much for your time, appreciate your help!

Answer 1

[Sabin]

Inertia is usually given in the datasheet. Friction constant can sometimes be ignored. We can also compute inertia using J=0.5mr^2

where:

- J is the moment of inertia,

- m is the mass of the rotor

- r is the radius of the rotor.

However, the information provided are not enough to compute the inertia.