DC Generator Basics
What fundamental law explains the working principle of a DC generator?
Faraday’s Law of Electromagnetic Induction.
What is the main function of the yoke in a DC generator?
Provides mechanical support and acts as a magnetic path.
What type of DC generator uses an external power source to excite the field winding?
Separately excited DC generator.
What type of loss occurs due to current flow in the windings?
Copper loss.
Which rule is used to determine the direction of induced current in a generator?
Fleming’s Right-Hand Rule.
What component in a DC generator is made of carbon and carries current to the load?
Brushes.
In which type of DC generator are the field windings connected in series with the armature?
Series DC generator
What type of losses include hysteresis and eddy current losses in the core?
Iron losses.
In a DC generator, what type of energy is converted into electrical energy?
Mechanical energy.
Which part holds the armature winding and rotates within the magnetic field?
Armature core.
Which DC generator has the field winding connected in parallel with the armature?
Shunt DC generator.
When are the efficiency of a DC generator at its maximum?
When variable losses equal constant losses.
What rotating part cuts the magnetic field to induce EMF in a DC generator?
Armature.
What part of a DC generator creates the magnetic field necessary for operation?
Field windings.
What is the name of a compound generator where the shunt field is connected across both armature and series field?
Long-shunt compound generator.
What are the three main categories of losses in a DC generator?
Copper losses, iron losses, and mechanical losses.
Which component ensures the output current remains unidirectional?
Commutator.
Which part changes the generated alternating EMF into a direct current output?
Commutator.
In which type of compound generator is the shunt winding connected only across the armature?
Short-shunt compound generator.
Which type of losses remain constant regardless of the load on the generator?
Constant losses