Electrical Machine Types with operation QUICK EXPLANATION


Continuous Electro-mechanical energy conversion devices are known as Electrical machines. Which is a reversible process. Electrical machines are machines that are either used to transfer or the generation of Electrical power. These may be low-power or high-power devices(in mV or kV). Here I am discussing the high-power devices in this article. Types of Electrical Machines: … Read more

Geometrical Neutral Axis (GNA) and Magnetic Neutral Axis (MNA)

Geometrical Neutral Axis (GNA) and Magnetic Neutral Axis (MNA)

What are the Geometrical neutral axis (GNA) and Magnetic neutral axis (MNA)? The Geometrical Neutral axis (GNA) bisects the angle between the two poles of a machine. Whereas the Magnetic Neutral axis (MNA) is the perpendicular axis on the magnetic flux line. Also machine has a “Direct (D) axis” and “Quadrature (Q) axis”. What is a … Read more

Open and Short Circuit test of Transformer

Open and short circuit tests are carried out to determine the equivalent circuit parameters of a single phase or 3 phase Transformer. An open circuit or the OC test of a transformer is used to measure “CORE losses“. Whereas the Short circuit or SC test of a transformer is used to measure the “Full load copper loss“. Open circuit or OC … Read more

Lap and Wave winding with Equalizer ring & Dummy coil


A rotating machine has an essential part known as Armature winding. Generally, this is responsible for making a rotating magnetic field in a machine. As a result, it provides back emf to the supply. This armature winding is classified into two types. One is Lap winding and another is Wave winding. These have their special … Read more

Transformer: Definition, Working principle, Diagram, Types


Continuous Electro-mechanical energy conversion takes place in an Electrical Machine. The transformer is not an Electrical Machine. It is a static device, that does not convert electrical energy to mechanical energy and vice versa. In Short, a Transformer is a thing in an electrical component that Steps up or down the voltage. The Step-up transformer increases the … 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

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

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