Armature Winding and Working Principle

The armature winding is an essential component of an electrical machine, such as a motor or generator. It is responsible for producing the electromotive force (emf) that drives the machine's operation. The working principle of the armature winding is based on the interaction between the magnetic field and the conductors.

Working Flux and EMF

The armature winding produces the working flux, which is the magnetic field generated by the flow of current through the winding. This working flux interacts with the conductors of the armature winding, inducing an electromotive force (emf) across the winding.

Interaction between Working Flux and Conductors

- When a current flows through the armature winding, a magnetic field is created around the conductors according to Ampere's right-hand rule. This magnetic field is known as the working flux.
- The working flux interacts with the conductors of the armature winding, inducing an emf in each conductor. This emf is proportional to the rate of change of the magnetic field, which is determined by factors such as the speed of rotation or the magnitude of the magnetic field.
- The induced emf in each conductor is in accordance with Faraday's law of electromagnetic induction. According to this law, a changing magnetic field induces an emf in a conductor, which creates an electric current if the circuit is closed.

Emf Production by Working Flux

The armature winding produces the emf by the working flux, which is the magnetic field generated by the current flowing through the winding. This working flux interacts with the conductors of the winding, inducing an emf across them. Therefore, the correct answer is option 'b' - the emf is produced by the working flux.

Conclusion

In summary, the armature winding is responsible for producing the emf in an electrical machine. This emf is generated by the working flux, which is the magnetic field produced by the current flowing through the armature winding. The interaction between the working flux and the conductors of the winding induces an emf across the winding, driving the operation of the machine.