Working of DC generator.
Answers
Working principle of a DC motor. A motor is an electrical machine which converts electrical energy into mechanical energy. ... When armature windings are connected to a DC supply, current sets up in the winding. Magnetic field may be provided by field winding (electromagnetism) or by using permanent magnets.
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A dc generator is an electrical machine which converts mechanical energy into direct current electricity. This energy conversion is based on the principle of production of dynamically induced emf.
1. Armature ABCD is rotated in anti clockwise direction inside the magnetic field.
2. Applying Fleming's right hand rule to arm AB (moving downwards)the direction of the induced current is found to be upwards (along AB).
3. Applying Fleming right hand rule to the arm CD direction of the induced current is found to be downwards
4. For the half rotation of the armature hence the direction of the induced current in the armature is clockwise i.e.
5. Similarly for the next half rotation of the armature applying Fleming's RH rule gives the direction of induced current to be again clockwise
6. Thus during the entire rotation, the current through load resistor R remains the same. The nature of the current produced is hence dc (direct current).