explain construction of dc motor
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Answers
DC Motor construction :
▶ The D.C motor consists of an armature coil which is kept in between the pole pieces of a bar magnet .
▶ A piece of soft iron is kept inside the coil .
▶ The coil is pivoted and can rotate around the axis .
▶ The coil must be placed between the opposite poles of a bar magnet and the direction of magnetic field of the bar magnet should be noted while making it .
▶ Now an axle is connected to the armature coil which helps in rotating the coil .
▶ At the end of the axle , two split rings ( rings split into halves ) are attached . They are called split ring commutators .
▶ Touching the split rings , two carbon brushes are kept . These carbon brushes helps to connect the split ring to the circuit .
▶ The carbon brushes are connected to a circuit from where electricity is drawn .
NOTE :
▶ The split rings are called the split ring commutators because they help in reversing the direction of current after every half rotation of the coil .
▶ The DC motor is a device which helps in changing electrical energy to mechanical energy . Example : electrical fan .
A DC motor is a device that converts direct current electrical energy to mechanical energy (learn about a DC motor’s working principle).
- A DC motor is constructed with:
- A Stator
- A Rotor
- A Yoke
- Poles
- Field windings
- Armature windings
- Commutator
- Brushes
A stator is the static part of the DC machine that houses the field windings and receives the supply. A rotor is the rotating part of the DC machine that brings about the mechanical rotations.
All these parts put together make up the total construction of a DC motor.
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