DC Motor Demonstration

This lecture demonstrates a DC motor with separate excitation, showing how it operates and the effects of cutting off the excitation. By analyzing the motor's torque-speed characteristic, the instructor explains why the motor accelerates unexpectedly when the excitation is cut off, due to the remanence of ferromagnetic materials in the motor. The lecture also explores the consequences of this phenomenon, highlighting the risks of motor damage and dangerous situations that can arise from the motor accelerating uncontrollably.