Question

To convert an AC generator into a DC generator

• A. split-ring type commutator must be used
• B. slip rings and brushes must be used
• C. a stronger magnetic field has to be used
• D. a rectangular wire loop has to be used

Answer 1

The correct option is A

split-ring type commutator must be used

AC to DC generator:

1. An alternating current generator is a mechanical device that transforms mechanical energy into alternating current electrical power.
2. A direct current generator is a mechanical device that transforms mechanical energy into direct current electrical power.
3. An AC generator might well be transformed into a DC generator by splitting half split slit circles in half and then attaching the two strands of the coils to them.

The diagram is shown below:

Split ring commutator:

1. A slip-ring commutator simply establishes a relationship or contact between the rotating rotor and the immovable stator, but a split-ring commutator causes the current to shift directions every alternative half-rotation.
2. Because the current direction switches every half-rotation and the split ring commutator reversed the current trajectory for each alternate half revolution, it basically turns the present state to positive throughout every half-cycle.
3. The rotor coil is connected to the split ring commutator (armature). The armature is often made up of many coils of insulated wire wrapped around an iron core, with each termination point connected to one side of the commutator. It carries current, which interacts with the magnetic field to produce torque.

Therefore, option A is the correct answer.