Design of speed control of seperately excited motor

[largecurrent]

I would like to ask for some help regarding the circuit design of this motor........

[berkeman]

Welcome to the Physics Forums. Homework questions should generally be posted in the Homework Forum area. And when you post a homework question, you should show your work so far, and ask specific questions about things that are confusing you.

It appears from the block diagram that you are tasked with designing a full motor speed control circuit. What have you done so far? Which blocks can you show us your design for?