Question

Relation between torque and speed of dc series motor equation

Answer 1

The Torque Equation and theRelationship with DC Motors. ... And when supply voltage is constant,speed is inversely proportional to the load on the motor. This secondrelationship—between speed and load (or torque)—is typically shown on themotor's torque-speed curve.

Answer 2

Torque control is very smooth, but relies on the driver to regulate the vehicle speed by varying the throttle position. A DC drive using open loop voltage control is in between the two. It's basically a softer, less versionspeed control, but isn't as smooth as torque control.