Three-Phase Alternators  Manufacturers, Traders, Suppliers

The three-phase generator is a form of electric generator. The main components of the three-phase generator are three- or multi-strand armature windings and the excitation system. The main components of a three-phase generator are the rotor, the exciter winding, the armature winding, the stator, the slip rings, the brushes and the rectifier diodes.The principle of a three-phase generator is based on electromagnetic induction:If the magnetic field in a coil changes, a voltage is induced. According to the law of induction, the higher the speed of vertical movement to the magnetic field lines and the greater the magnetic flux, the higher the induced voltage. The magnetic field for generating the induced voltage is often generated by so-called permanent magnets, which do not require a lot of technical effort (e.g. for bicycle dynamos).permanent magnets, however, cannot be controlled. In order to generate a controllable magnetic field, three-phase generators use electromagnets consisting of an iron core and an excitation winding. The number of windings determines the magnetic field strength, the magnetised iron core of the electromagnet conducts the generated magnetic field. If the excitation current is changed, the magnitude of the induced voltage can be set.If the excitation current is branched off from the generated generator current within the generator, this is referred to as self-excitation. An external excitation occurs when an energy source located outside the generator (e.g. battery) supplies the excitation current.Three-phase generators can act as synchronous or asynchronous generators and are mainly used in power plants (hydroelectric power plants, steam power plants) or emergency power generators.