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

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

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

Alternator Synchronous Generator | Definition and Types of Alternator

An alternator is defined as: An alternator is a machine which converts mechanical energy to electrical energy in the form of alternating current (at a specific voltage and frequency). Alternators are also known as synchronous generators. History of Alternator Michael Faraday and Hippolyte Pixii gave the very first concept of alternator. Michael Faraday designed a … Read more

Working Principle of Alternator

The working principle of alternator is very simple. It is just like basic principle of DC generator. It also depends upon Faraday’s law of electromagnetic induction which says the current is induced in the conductor inside a magnetic field when there is a relative motion between that conductor and the magnetic field. For understanding working … Read more

Construction of Alternator

Construction wise, an alternator consists of field poles placed on the rotating fixture of the machine i.e. rotor as shown in the figure above. The rotor rotates in the stator. The field poles get projected on the rotor body. The armature conductors are housed on the stator. An alternating three-phase voltage represented by aa’, bb’, … Read more

Parallel Operation of Alternator

Alternator is really an AC generator. In alternator, an EMF is induced in the stator (stationary wire) with the influence of rotating magnetic field (rotor) due to Faraday’s law of induction. Due to the synchronous speed of rotation of field poles, it is also known as synchronous generator. Here, we can discuss about parallel operation … Read more

Armature Reaction in Alternator or Synchronous Generator

Every rotating electrical machine works based on Faraday’s law. Every electrical machine requires a magnetic field and a coil (Known as armature) with a relative motion between them. In case of an alternator, we supply electricity to pole to produce magnetic field and output power is taken from the armature. Due to relative motion between … Read more