EL0019 - DC Machines

What is the component labelled

"F"

d

Commutator

Brush holder

Armature winding

Frame

Field magnet

Armature laminations

What is the component labelled

"C"

b

Brush holder

Armature laminations

Frame

Commutator

Armature winding

Field magnet

What is the component labelled

"D"

a

Commutator

Armature winding

Field magnet

Frame

Brush holder

Armature laminations

Converts Electrical energy into Mechanical energy​: (a)  

Converts Mechanical enrgy into Electrical energy:​ (b)  

• DC Motor
• DC Generator
• Relay
• Series Circuit
• Hysteresis
• Eddy Currents

Which way will the coil spin if it was a generator?

• Clockwise

• Anticlockwise

Answer explanation

Right hand rule for generators

Which parts of a DC machine usually requires the most maintenance?

• Windings

• Field magnets

• Commutator

• Brushes

• Frame

Identify the following circuit diagram

• Self excited compound DC Generator (Short Shunt)

• Self excited compound DC Generator (Long Shunt)

• Seperatley excited DC Generator

• Self excited shunt DC Generator

Identify the following circuit diagram

• Self excited compound DC Generator (Short Shunt)

• Self excited compound DC Generator (Long Shunt)

• Seperatley excited DC Generator

• Self excited shunt DC Generator

Identify the following circuit diagram

• Self excited compound DC Generator (Short Shunt)

• Self excited compound DC Generator (Long Shunt)

• Seperatley excited DC Generator

• Self excited shunt DC Generator

Identify the following circuit diagram

• Self excited compound DC Generator (Short Shunt)

• Self excited compound DC Generator (Long Shunt)

• Seperatley excited DC Generator

• Self excited shunt DC Generator