Q4. a) Figure 3 depicts a simple DC motor, its armature winding consisting of a single turn of copper wire mounted on the rotor. The rotor core material is omitted for clarity. N GOD 富 Figure 3 Explain how the motor winding develops a rotational torque. Explain how a back-emf is produced in the rotating winding. What is the role of the split-ring commutator? The direct voltage supply to the armature is replaced with an alternating voltage source operating at 50Hz. Will the machine still rotate? Explain your answer e (i) (ii) (iii) (iv) S

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Q4.
a)
Figure 3 depicts a simple DC motor, its armature winding consisting
of a single turn of copper wire mounted on the rotor. The rotor core
material is omitted for clarity.
N
Figure 3
Explain how the motor winding develops a rotational torque.
Explain how a back-emf is produced in the rotating winding.
What is the role of the split-ring commutator?
The direct voltage supply to the armature is replaced with an
alternating voltage source operating at 50Hz. Will the
machine still rotate? Explain your answer
e
(i)
(ii)
(iii)
(iv)
S
400H
Transcribed Image Text:Q4. a) Figure 3 depicts a simple DC motor, its armature winding consisting of a single turn of copper wire mounted on the rotor. The rotor core material is omitted for clarity. N Figure 3 Explain how the motor winding develops a rotational torque. Explain how a back-emf is produced in the rotating winding. What is the role of the split-ring commutator? The direct voltage supply to the armature is replaced with an alternating voltage source operating at 50Hz. Will the machine still rotate? Explain your answer e (i) (ii) (iii) (iv) S 400H
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