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…
Star-delta starter (Wye-Delta Starters) – Circuit, working
Induction motors are robust and reliable and are used in all industries across the globe. Various methods are followed to start induction motors, out of which star-delta starters are the…
Comparison of core type and shell type transformers
A magnetic core and windings are two basic parts of a transformer. The windings are wound over the core and the core encircles the windings. Based on the way the…
Selection and sizing of transformers – made easy
A transformer is the device that makes power systems flexible, scalable and help save cost by reducing power loss. Here you can learn the selection and sizing of transformers and…
Autotransformer – Principle, advantages, copper savings
An autotransformer is a single-winding electrical transformer. It is also known as variac or dimmer stat. It is made of a single-winding coil. This single-winding setup makes them cheaper, more…
Parts of a transformer
The transformer facilitates the delivery of power electric energy at minimum power loss. The basic parts of a transformer are the core, the primary winding, and the secondary winding. Apart…
K-factor rated transformers
What are K-factor rated transformers? K-factor rated transformers are capable of withstanding the heating effects caused by harmonic load currents. They are specially designed for non-linear harmonics generating loads. It…
What is magnetization current in a transformer?
A certain amount of current is drawn by a transformer from the source connected to it primary even when no load is connected to its secondary. A part of this…