How is a DC motor constructed?

How is a DC motor constructed?

A DC motor or machine consists of two windings namely field winding and armature winding. The field winding is stationary and the armature winding can rotate. The field winding produces a magnetic flux in the air gap between the armature and field windings and the armature is placed in this magnetic field.

What is DC motor construction and working?

A DC motor is an electromechanical energy conversion device, which converts electrical energy input into the mechanical energy output. The operation of the DC motor is based on the principle that when a current carrying conductor is placed in a magnetic field, a mechanical force acts on the conductor.

Which part is used in construction of DC machine?

Commutator
Which of the following part is used in construction of DC machine but not in AC machine? Explanation: Commutator is used in mechanical rectification process, to convert induced AC to output DC.

What is rotor in DC motor?

The rotor is a moving component of an electromagnetic system in the electric motor, electric generator, or alternator. Its rotation is due to the interaction between the windings and magnetic fields which produces a torque around the rotor’s axis.

How is a DC generator construction?

It mainly consists of three main parts, i.e. magnetic field system, armature and commutator and brush gear. The other parts of a DC Generator are magnetic frame and yoke, pole core and pole shoes, field or exciting coils, armature core and windings, brushes, end housings, bearings and shafts.

How does rotor rotate in DC motor?

When the motor is powered by DC current, a magnetic field is created within the stator, attracting and repelling the magnets on the rotor. This causes the rotor to start rotating. To keep the rotor rotating, the motor has a commutator.

How is an electric motor constructed?

Construction:- The ends of coil are connected to two halves split rings. The inner sides of split rings are insulated and attached to an axle. The external conducting edges of split rings touch two carbon brushes. The opposite sides of brushes are connected with battery and key as shown in figure.

What are DC motor brushes made of?

Metal Graphite Brushes are generally made from natural graphite and finely divided metal powders. Copper is the most common metallic constituent but silver, tin, lead and other metals are sometimes used. These brushes are often ideal for a wide variety of applications because of their low resistivity.

Why are carbon brushes used in DC motors?

The purpose of carbon brushes in DC motors is to reduce wear on the commutator as well as transferring electricity from outside the motor to the centre.

What is rotor assembly?

The rotor assembly consists of a die-cast rotor and a shaft. Both components may be completely machined and assembled, partially machined and assembled, or a combination of both.

What is the purpose of rotor in electric motor?

Rotor – The rotor is a coil mounted on an axle and it provides the rotational mechanical energy. It spins at high speed and can include conductors that carry current and interact with the magnetic field in the stator.

What is the function of rotor?

Rotors are the moving part in an Alternator that have permanent magnets that move around the Stator’s iron plates to generate an Alternating Current (AC). Rotors require existing motion to function, so only once the engine or turbine is already running will a Rotor work with a Stator to provide a charge.

What are the components of rotor?

Wire is the material the current travels through. The wire is also called a conductor. Wires are typically made of copper; however, aluminum is occasionally used….Stator and rotor in different languages.

What is the construction of a motor?

The electric motor construction can be done using the rotor, bearings, stator, air gap, windings, commutator, etc. The rotor in an electric motor is the moving part, and the main function of this is to rotate the shaft for generating the mechanical power.

What is the construction of a DC generator?

What is the difference between stator and rotor?

The term, “stator” is derived from the word stationary. The stator then is the stationary part of the AC motor. The rotor is the rotating electrical component. It also consists of a group of electro-magnets arranged around a cylinder, with the poles facing toward the stator poles.