Conservation of Power in the armature circuit of a DC motor

[Cocoleia]

Homework Statement

I am asked in a lab report to explain the conservation of power in the armature circuit of the DC motor.

Homework Equations

This is the data I have acquired:

The Attempt at a Solution

I have been reading around, and I have learned somewhat about the Armature Copper Loss. I am saying that this is one part of the energy that is lost in a DC motor. Is there any other source ? Is there a power conservation relation or equation for the armature circuit of a DC motor ? I mean, from looking at the data you can only see that as expected with a higher load you need more power. I don't know how to study the conservation of power of the armature circuit with this data ...

Thanks

 

[cnh1995]

You need to provide more information.

From the data you've obtained, it appears that the speed of your motor is increasing linearly with increase in load torque.
Which motor is it? How are you increasing the speed?

 

[Cocoleia]

You need to provide more information.

From the data you've obtained, it appears that the speed of your motor is increasing linearly with increase in load torque.
Which motor is it? How are you increasing the speed?

This was all simulations done on Matlab. I just increased the load by 50 each time. It's a DC motor, I don't think they specified any type of model or anything

 

[cnh1995]

This surely is a simulation result, because the speed increases very linearly with the load and the losses are zero. Did you set the value(s) for motor voltage and record the current?