In the DC motor the iron losses occur in
A. The field.
B. The armature.
C. The commutator.
D. The brushes
Show Answer
Answer: B
Share your understanding of this question with the correct explanation.
In a DC motor, the iron losses occur in the armature.
Iron losses, also known as core losses or hysteresis losses, refer to the energy dissipated as heat in the iron core of the motor due to magnetic flux variations. These losses are associated with the magnetization and demagnetization of the iron core as the magnetic field changes direction.
In a DC motor, the armature consists of a laminated iron core that houses the armature winding. The armature winding carries the armature current and is responsible for generating the mechanical output of the motor.
As the armature rotates within the magnetic field produced by the field winding, the magnetic flux passing through the iron core of the armature continually changes. This results in hysteresis losses and eddy current losses in the iron core, leading to iron losses.
The field, commutator, and brushes do not directly contribute to iron losses in a DC motor. The field winding establishes the magnetic field, the commutator facilitates the conversion of current direction in the armature winding, and the brushes provide electrical contact between the power supply and the armature winding.
Therefore, the correct answer is B: The armature. In a DC motor, the iron losses occur in the armature due to hysteresis and eddy current losses in the iron core of the armature.