Lenz’s law

Heinrich Friedrich Emil Lenz was a Russian physicist, working at the University of St. Petersburg, Russia. He formulated Lenz's law in 1834. This law predicts the direction of the current…

Motor rated current v/s Full load current v/s Nominal current

The terms, motor rated current, full load current and nominal current, are very likely to confuse electrical engineers. Even though these terms are quite similar, there are slightly different from…

Simple motor rated current calculator with calculation steps

Motor rated current also known as full load amperes (FLA) of a motor is the maximum current the motor windings are designed to carry. Here is a simple motor-rated current…

Induction motor slip calculator

The speed of an induction motor is always lesser than its synchronous speed. The difference between the actual speed and the synchronous speed of a motor is known as slip.…

What is an Electric Motor?

An electric motor is an energy transformation machinery. It transforms electrical energy into mechanical energy. In other consumes electrical energy and delivers mechanical energy in the form of rotations. For…

EMF equation of an alternator and solved problems

An alternator or a synchronous generator is a device used to convert mechanical energy to Alternating current electric current. The EMF equation of an alternator is a mathematical expression to…

EMF equation of DC machines

EMF equation of DC machines is a mathematical expression to calculate the EMF induced in a DC machine. As you know, the amount of EMF induced in a conductor depends…

EMF equation of transformers

EMF equation of transformers lets you calculate the RMS values of induced voltages in the primary and secondary windings of a transformer. An alternating voltage, when applied to the primary…

Parts of a motor

An electric motor converts electrical energy to mechanical energy. In general, an electric motor consists of a stator, a rotor, winding, bearings, and casing. The motor rotates due to the…

Number of poles calculator

Most of the time, the motor nameplates do not contain the number of poles data on them. The number of poles in a motor can be calculated from its synchronous…