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Working Principles of DC Motors: Diploma/Certificate in Electrical Engineering Module 1

Institution: COLLEGE

Course: Diploma/Certificate in Electrical Engineering Module 1

Content Category: class notes

Posted By: 6611588

Document Type: DOCX

Number of Pages: 17

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Download detailed working principles of DC motors, the notes we for students undertaking electrical and mechanical engineering,
a) What is DC Motor?
The DC motor is the motor which converts the direct current into the mechanical work. It works on the principle of Lorentz Law, which states that “the current carrying conductor placed in a magnetic and electric field experience a force”. And that force is the Lorentz force.
b) CONSTRUCTION OF DC MOTOR
Before understanding the working of DC motor first, we have to know about their construction. There are two main parts of the DC motor.
• Armature
• Stator
The rotating part is the armature and the Stator is their stationary part. The armature coil is connected to the DC supply.
Armature winding is classified into two types namely lap winding as well as wave winding. The main difference between these two is, in the lap winding, One of the major difference between them is that in a lap winding, the last part of every coil is associated with the nearby sector while in the wave winding the last part of armature coil is associated with the commutator sector at a distance apart.
i) Lap Winding Definition
Lap Winding is one type of winding with two layers, and it is used in electric machines. Every coil in the machine is allied in series with the one nearby coil to it. The applications of lap winding mainly include low voltage as well as high current machines.
Lap Winding
These windings are mainly linked for providing numerous parallel lanes for armature current. Due to this reason, this type of winding is used in dc generators, and it requires some pairs of brushes and poles. In this type of winding, the final end of the first coil is associated with a commutator section and to the first end of the closest coil is located beneath the similar pole till every coil have been associated.
ii) Wave Winding Definition
In wave winding, one end part of the coil is allied to the beginning end part of another coil which has a similar polarity like the first coil. These coils are allied in the waveform and thus it is named as wave winding. The conductor of this winding is divided into two parallel lanes, & every lane had Z/2 conductors which are connected in series. The amount of brushes is equivalent to 2, that is the digit of parallel paths
Wave Winding

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Working Principles of DC Motors: Diploma/Certificate in Electrical Engineering Module 1

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