Cogging and Crawling in Induction Motor

cogging and crawling in Induction Motor

Introduction Cogging and crawling are phenomena that can occur in induction motors, which are a type of electrical machine that converts electrical energy into mechanical energy. Induction motors are widely used in a variety of applications, from small household appliances to large industrial systems, due to their simplicity, reliability, and low cost. However, cogging and … Read more

Efficiency of Transformer

Efficiency of transformer

Introduction Efficiency is a crucial aspect of any industry, and the transformer is no exception. In the electrical power industry, transformer efficiency is defined as the ratio of the output power to the input power, typically expressed as a percentage. A transformer with high efficiency is able to transfer more power from the input side … Read more

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

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

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