## Armature core of a DC machine

In the case of DC generators – Mechanical Input is applied to the shaft/rotor (i.e, Armature) and Electrical output is collected from Armature itself. In the case of DC Motors – Electrical Input is applied at the Armature terminal and mechanical output at the rotor is received(i.e, Armature). Therefore armature is the center for electromechanical … Read more

## Speed Control of the DC motor: Essential Tips

For an electrical and electronics engineering student here are some tips for Speed control of the DC motor. if you are looking for this, then you are at the right place. By the end of this article, you will be able to know everything about the Speed control of the DC machine. So be there … Read more

## Open coil winding and Closed coil winding of DC machine

Open coil winding and closed coil winding are the types of Armature windings. Armature windings are the non-salient pole type and usually are symmetrically distributed in the slots of the complete circumference of the armature. Basically two types of armature windings according to the degree of closure produced: Open Coil Winding: Open coil windings are … Read more

## DC machine Construction: Yoke, Poles, Commutator, Brushes, Bearings

Generally, a rotating machine has two parts in common one is a stationary part and another is a rotating part. The stationary part of the DC (Direct Current) machine contains several components of the machine such as field winding, pole shoes, bearings, etc. Whereas the rotating part of the DC machine has armature winding, armature … Read more

## What is Voltage Divider or Division Rule? with Formula and Example

Generally, we need the Voltage division Formula where there is a Series network of the different elements like Resistor, Capacitor, or Inductor. We can use the Voltage Divider/Division Rule to find the voltage across each element of the circuit easily with examples. Then there is no need to apply KCL (Kirchhoff’s current law) and KVL … Read more

## Armature winding: Coil span, pole pitch & commutator pitch

Firstly we need to know about basic things like Coil, Pole Pitch, commutator pitch, and Span for a better understanding of these words in the DC machine. What is the coil? The coil of the DC machine uses copper (mainly enameled copper). Some of the machines have a single turn and some have Multi turns … Read more

## EMF Equation of a Transformer, Transformation & turns ratio

A Transformer has primary side and secondary side. One is high voltage(HV) side and other is low voltage(LV) side depending upon the application. If someone buy a transformer from the market. He or she doesn’t get to know, which is HV side and which is LV side by naked eyes. So we need to know … Read more