On a dc motor, torque can be monitored by monitoring the current, speed can by monitored by monitoring the voltage. If your project needs torque, you may want a current source, but as stated earlier, they depend on each other.
During my days on an diesel electric oil rig, we would test the breakers by pinning the rotary table and applying full power, the voltage/speed meter would stay close to zero and the torque/current meter would go to ~ 1300 amp and trip the 1000 amp breaker and not even load the generator because the phase shift was close to 90 degrees.