Question 4: DC machine calculations

Draw the torque-speed steady state characteristics of

the load and the electrical machine for three different

points (different speeds, different loads...)

• You must get the electrical a mechanical data from

the catalogue

What type of connection do you use for your machine

(independent, series, parallel, compound)? Why?

For the three plotted points, calculate the power and

current absorbed from the energy source. Assume an

ideal variable voltage source

Based on week 5 material, describe how you would

control the speed of your drive