Best Portable Generator – Our Top Picks of 2019

A great portable generator is one that you can rely on to get you through emergencies. It needs to be reliable, durable, and long lasting. On the flipside, a poorly-made generator can let you down just when you need it most. Today, we’re going to review the Top 7 Portable Generators – so that you … Read more

Working Principle of Electric Generator

When a conductor moves in a magnetic field, an emf is induced across the conductor. This is the only basis on which each and every rotating electric generator works (such as portable generators). According to Faraday’s law of electromagnetic induction, when a conductor links with a changing flux, it will have an induced emf across … Read more

Natural Gas Power Generators

The most essential driving unit of our household and commercial lives is electricity. And the world is relying more on clean and green sources of energy to generate it. The natural gas power generator is an exemplary cleaner power source developed in this regard. This power generator has been in use for generating electrical power … Read more

Armature Winding of Alternator

Armature winding in an alternator may be either closed type open type. Closed winding forms star connection in armature winding of alternator. There are some common properties of armature winding. First and most important property of an armature winding is, two sides of any coil should be under two adjacent poles. That means, coil span … Read more

Rating of Alternator

Power rating of an alternator is defined as the power which can be delivered by an alternator safely and efficiently under some specific conditions. Increasing load increases losses in the alternator, which leads to a temperature rise of the machine. The conductor and insulator parts of the machine have some specific overheating withstand limits. The … Read more

Winding Factor | Pitch Factor | Distribution Factor

Before knowing about, winding factor, we should know about pitch factor and distribution factor, since winding factor is the product of pitch factor and distribution factor. If we denote winding factor with Kw, pitch factor with Kp and distribution factor with Kd, we can write The pitch factor and distribution factor are explained below one … Read more

Derivation of Various Power Conditions in Alternators and Synchronous Motors

In order to derive various conditions for power in both alternators and synchronous motors, let us consider the general problem of power flow through inductive impedance. The circuit diagram shown below consists of voltage source E1, voltage source E1 and load which consists of one resistor in series with an inductor. Now if we assume … Read more

Hopkinson Test

Hopkinson’s Test is another useful method of testing the efficiency of a DC machine. It is a full load test and it requires two identical machines which are coupled to each other. One of these two machines is operated as a generator to supply the mechanical power to the motor and the other is operated … Read more

Phasor Diagram for Synchronous Generator

In the present article we are going to discuss one of the easiest methods of making the phasor diagram for synchronous generator. Now, let us write the various notations for each quantity at one place, this will help us to understand the phasor diagram more clearly. In this phasor diagram we are going to use: … Read more

EMF Equation of DC Generator

The derivation of EMF equation for DC generator has two parts: Induced EMF of one conductor Induced EMF of the generator Derivation for Induced EMF of One Armature Conductor For one revolution of the conductor, Let, Φ = Flux produced by each pole in weber (Wb) and P = number of poles in the DC … Read more