Design of electrical machines 5 min read
Design of commutator and brushes
The Commutator is an assembly of Commutator segments or bars tapered in section. The segments made of hard drawn copper…
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Design of electrical machines 6 min read
Design of Armature
The armature winding can broadly be classified as concentrated and distributed winding. In case of a concentrated winding, all the…
Design of electrical machines 5 min read
Selection of number of poles
As the armature current increases, cross sectional area of the conductor and hence the eddy current loss in the conductor…
Design of electrical machines 1 min read
Real & Apparent flux densities
Although a detailed description of the design of a DC machine is beyond the scope of this material, some design…
Design of electrical machines 1 min read
Carter’s Coefficient
Carter’s gap expansion coefficient Where Kgs is called the Carter’s gap expansion coefficient for slots and is greater than 1.0.…
Design of electrical machines 4 min read
Magnetic Circuit Calculations:
Normally magnetic circuit calculations involve two types of problems. In the first type of problem it is required to determine the excitation…
Design of electrical machines 5 min read
DC Motors
Industrial applications use direct current motors because the speed-torque relationship can be varied to almost any useful form — for…
Design of electrical machines 3 min read
Factors Effecting the Resistivity of Electrical Materials
Factors effecting the resistivity of electrical materials are listed below – 1. Temperature. 2. Alloying. 3. Mechanical stressing. 4. Age Hardening. 5. Cold Working. Temperature The…
Design of electrical machines 3 min read
High Resistivity or Low Conductivity Conducting Material
Materials having high resistivity or low conductivity are very useful for some electrical engineering products and applications. These material are used to…
Design of electrical machines 3 min read
Low Resistivity or High Conductivity of Conducting Material
Material having low resistivity or high conductivity are very useful in electrical engineering for manufacturing electrical engineering machines or equipment’s. These material used as conductors for…
Design of electrical machines 4 min read
Classification of Electrical Conducting Materials
Electrical conducting material are the basic requirement for electrical engineering products. The electrical conducting material can be classified as below- Based…
Design of electrical machines 3 min read
Classification of Electrical Engineering Materials
Materials used in the field of Electrical Engineering are called the Electrical Engineering materials. Based on properties and area of applications, Electrical Engineering…