Lecture
This lecture covers the construction and operation of a direct current (DC) motor. The DC motor is widely used for low-power applications due to its simplicity in implementation. The stator of the motor contains magnets or coils that create a stator flux, while the rotor consists of coils connected to a commutator. The commutator ensures the proper alignment between the stator flux and the rotor flux, resulting in efficient torque generation. The interaction between the constant stator flux and ideally constant rotor flux leads to the rotation of the motor. The commutation mechanism, facilitated by the commutator and brushes, plays a crucial role in maintaining the alignment of the fluxes. Overall, the lecture emphasizes the fundamental principles behind the functionality of DC motors.