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Forklift Alternator
Forklift Alternators - A device used so as to change mechanical energy into electric energy is actually known as an alternator. It can perform this function in the form of an electrical current. An AC electrical generator can in principal likewise be labeled an alternator. Then again, the word is typically used to refer to a small, rotating device powered by internal combustion engines. Alternators which are located in power stations and are driven by steam turbines are actually known as turbo-alternators. Most of these devices make use of a rotating magnetic field but sometimes linear alternators are also used.
A current is produced inside the conductor when the magnetic field all-around the conductor changes. Normally the rotor, a rotating magnet, spins within a set of stationary conductors wound in coils. The coils are situated on an iron core referred to as the stator. If the field cuts across the conductors, an induced electromagnetic field also called EMF is generated as the mechanical input causes the rotor to turn. This rotating magnetic field generates an AC voltage in the stator windings. Typically, there are 3 sets of stator windings. These physically offset so that the rotating magnetic field produces 3 phase currents, displaced by one-third of a period with respect to each other.
In a "brushless" alternator, the rotor magnetic field could be made by induction of a permanent magnet or by a rotor winding energized with direct current through slip rings and brushes. Brushless AC generators are usually found in bigger devices compared to those utilized in automotive applications. A rotor magnetic field can be induced by a stationary field winding with moving poles in the rotor. Automotive alternators usually utilize a rotor winding which allows control of the voltage produced by the alternator. This is done by changing the current in the rotor field winding. Permanent magnet machines avoid the loss because of the magnetizing current inside the rotor. These devices are limited in size because of the cost of the magnet material. The terminal voltage varies with the speed of the generator as the permanent magnet field is constant.
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