Happy new year.
I was asked to model your motor, using MATLAB but however I do not have motor parameters.
I need the following parameters :
I need you to confirm that either my values or assumptions are make sense.
Thank you
Josef Neto
I was asked to model your motor, using MATLAB but however I do not have motor parameters.
I need the following parameters :
- Inertia of motor armature
- Motor torque constant
- Backemf constant
- Motor induction
- Armature resistance
- Choosing Torque 1.20Nm, Current 0.8A, Efficiency 42% from the performance table
- Assuming inductance of the armature are very small nearly zero, so backemf becomes voltage supplied - resistance x current armature, by that Ke=backemfvoltage/speed so ke=0.2681 v/rpm
- By using the value chosen I found, the torque coefficient kt= torque/current =1.5Nm/A.
- To find the inertia, I had to find the acceleration so, I rotate the motor at 41rpm during 30s so the acceleration is 0.002 rev/s2
- Since this is equivalent to 1.20Nm torque so, Inertia J=1.20/0.0022 =54.05Nm/rev/s2
- Since B viscous friction is very small assumed it to be 0,08
- L (inductance) assumed to be 0.1
- I measured R to be 2.44, devide by 2 , we have 1.22 ohms.
I need you to confirm that either my values or assumptions are make sense.
Thank you
Josef Neto