Controlling the flow of electrical energy by switching electronic circuits is what power electronics is all about. It is the technology that...

Basic configuration of a permanent magnet DC motor is very similar to that of a normal DC motor. The working principle of any DC motor is s...

AC machines can be further classified as Induction machines and Synchronous machines . And hence, AC generators as Synchronous generators (...

Normally the generators are coupled in parallel at most of the power station through bus-bars. Bus-bars have positive and negative terminals...

Just like a DC Machine , a same induction machine can be used as an induction motor as well as an induction generator , without any interna...

Stepper motor (also called as step motor) is basically a brushless DC motor , whose rotor rotates through a fixed angular step in response ...

This is a brief and simple understanding of what a circuit is and the usage of it. We all know about electricity. It is the flow electr...

Generally, three characteristic curves are considered important for DC motors which are, (i) Torque vs. armature current, (ii) Speed vs. ar...

Generally, following three characteristics of DC generators are taken into considerations: (i) Open Circuit Characteristic (O.C.C.), (ii) I...

What is a Buchholz relay? Buchholz relay is a safety device which is generally used in large oil immersed transformers (rated more tha...

Sometimes, it becomes necessary to connect more than one transformers in parallel, for example, for supplying excess load of the rating o...

No transformer is truly an ' ideal transformer ' and hence each will incur some losses , most of which get converted into heat. If...

Instrument Transformers How will you measure AC currents and voltages of very high magnitude? You will need the measuring instruments ha...

Three phase transformer connections In three phase system, the three phases can be connected in either star or delta configuration. In cas...

Usually power is generated and distributed in three phase system, and therefore it is obvious that we would need three phase transformers ...