Posted inDesign of electrical machines
Design of commutator and brushes
The Commutator is an assembly of Commutator segments or bars tapered in section. The segments…
Posted inDesign of electrical machines
Design of Armature
The armature winding can broadly be classified as concentrated and distributed winding. In case of…
Posted inDesign of electrical machines
Selection of number of poles
As the armature current increases, cross sectional area of the conductor and hence the eddy…
Posted inDesign of electrical machines
Real & Apparent flux densities
Although a detailed description of the design of a DC machine is beyond the scope…
Posted inDesign of electrical machines
Carter’s Coefficient
Carter’s gap expansion coefficient Where Kgs is called the Carter’s gap expansion coefficient for slots…
Posted inpower system
Machine Models
SYNCHRONOUS MACHINES, i.e. practically all generators together with synchronous motors and synchronous compensators, are the…
Posted inDesign of electrical machines
Magnetic Circuit Calculations:
Normally magnetic circuit calculations involve two types of problems. In the first type of problem it is…
Posted inDesign of electrical machines
DC Motors
Industrial applications use direct current motors because the speed-torque relationship can be varied to almost…
Posted inDesign of electrical machines
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…
Posted inDesign of electrical machines
High Resistivity or Low Conductivity Conducting Material
Materials having high resistivity or low conductivity are very useful for some electrical engineering products and applications.…