## Delta Connection

In this method of interconnection, the dissimilar ends of three phase windings are joined together i.e. finishing end of one phase is connected to the starting end of the other phase and so on to obtain a closed circuit. The three line conductors are taken from the three junctions of mesh and are denoted by R, …

## Star Connection

If the three armature coils of a 3-phase alternator are not interconnected but are kept separate, as shown in Figure below, then each phase or circuit would need two conductors, the total number of conductors, in that case, being six. It means that each transmission cable would contain six conductors which will make the whole …

## Eddy Current Loss

Hi friends, In this article, I am discussing the eddy current loss, eddy current loss formula, its causes and applications. So let us start with our topic. What is eddy current loss? Whenever the magnetic flux linking to conducting material changes, voltages are induced in all possible paths and hence the induced currents are set up …

## Hysteresis Loss | Loop

Hi friends, in this article, I am going to discuss the hysteresis loss, hysteresis loop in the magnetic material in and their significance. So let us start. A ferromagnetic material consists of local regions called ‘domains,’ each of which is spontaneously magnetized. In an unmagnetized material, the directions of magnetization in different domains are different. …

## Self Induced EMF and Mutually Induced EMF

When the flux linking with a coil (or conductor) changes, an EMF is induced in the coil. This EMF can be induced by the following two ways: Self Induced EMF The EMF induced in a coil due to change of flux produced by it linking with its own turns is known as self-induced EMF.  Consider …

## Series and Parallel Magnetic Circuits

A closed path followed by magnetic flux is known as a magnetic circuit. In a magnetic circuit, flux starts from one point and finishes at the same point. A magnetic circuit usually consists of magnetic materials having high permeability such as iron, soft-steel, etc. since they offer small opposition to magnetic flux. The magnetic flux is …

## Power Factor in AC Circuit

In DC circuits, the product VI gives the power in watts drawn by the circuit. But in AC circuits, things are different. In AC circuits, the product VI gives the apparent power and not the real power because the voltage and current are not in phase with each other. Power Factor in AC Circuit The …

## RC | RLC | RL Series Circuits

In actual practice, AC circuits contain two or more than two components connected in series. In a series circuit, each component carries the same current. An AC series circuit may be classified as under: RL Series Circuit  In an RL series circuit, a pure resistance (R) is connected in series with a coil having the …

## Purely Resistive | Inductive | Capacitive Circuit

All AC circuits are made up of the combination of resistance R, inductance L and capacitance C. The circuit elements R, L, and C are known as circuit parameters. To study a general AC circuit it is necessary to consider the effect of each parameter separately. Purely Resistive Circuit  A purely resistive circuit is a …

## RMS Value of AC Current | Derivation

In a DC system, the voltage and current are constant, therefore, there is no problem in specifying their magnitude. But in the case of an AC system, an alternating voltage varies from instant to instant and so poses a problem in specifying the magnitude. So to express the AC quantities in an easy and understandable form, …