Alternators

An alternator is a device that changes mechanical energy into electric energy. This is done in the form of an electrical current. In essence, an AC electrical generator could likewise be called an alternator. The word usually refers to a small, rotating device driven by automotive and different internal combustion engines. Alternators which are situated in power stations and are powered by steam turbines are actually called turbo-alternators. Most of these devices use a rotating magnetic field but every so often linear alternators are also utilized.

A current is produced within the conductor when the magnetic field around the conductor changes. Usually the rotor, a rotating magnet, spins within a set of stationary conductors wound in coils. The coils are located on an iron core referred to as the stator. When the field cuts across the conductors, an induced electromagnetic field or EMF is produced as the mechanical input causes the rotor to revolve. This rotating magnetic field produces an AC voltage in the stator windings. Typically, there are 3 sets of stator windings. These physically offset so that the rotating magnetic field generates 3 phase currents, displaced by one-third of a period with respect to each other.

"Brushless" alternators - these make use of brushes and slip rings along with a rotor winding or a permanent magnet in order to induce a magnetic field of current. Brushlees AC generators are usually located in larger machines like industrial sized lifting equipment. A rotor magnetic field could be produced by a stationary field winding with moving poles in the rotor. Automotive alternators usually utilize a rotor winding that allows control of the voltage generated by the alternator. This is done by changing the current in the rotor field winding. Permanent magnet machines avoid the loss due to the magnetizing current within the rotor. These devices are restricted in size because of the cost of the magnet material. As the permanent magnet field is constant, the terminal voltage varies directly with the generator speed.

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Forklift Masts and Parts

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  Brakes
  

  A brake wherein the friction is supplied by a set of brake shoes or brake pads that press against a rotating drum unit called a brake drum. There are a few particular differences among brake drum kinds. A "brake drum" is commonly the definition ...

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  Carriage Rollers
  

  Particularly designed bearings known as carriage rollers are frequently seen on lift masts because they allow them to function better within tough environmental surroundings. The typical lift mast is regularly subject to frequent oscillations, ...

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  Carriages and Carriage Parts
  

  Rated by the tine carriage hoisting capacity, there are actually four sizes of hook type blade carriages. The hook type tine carriages have been standardized. Class I carriages are rated for cargo as much as 2000 lbs. The carriage bar spacing ...

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  Control Valves
  

  The earliest mechanized control systems were being used more that two thousand years ago. In Alexandria Egypt, the ancient Ktesibios water clock constructed in the 3rd century is considered to be the first feedback control device on record. This ...

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  Controllers
  

  Forklifts are available in a wide range of load capacities and various models. The majority of lift trucks in a typical warehouse setting have load capacities between 1-5 tons. Larger scale units are utilized for heavier loads, like for instance ...

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  Differentials
  

  A mechanical machine capable of transmitting torque and rotation via three shafts is called a differential. Every now and then but not all the time the differential will employ gears and will function in two ways: in automobiles, it receives one ...

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  Drive Axles
  

  The piece of equipment that is elastically fastened to the frame of the vehicle utilizing a lift mast is known as the lift truck drive axle. The lift mast affixes to the drive axle and could be inclined, by no less than one tilting cylinder, ...

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  Drive Motors
  

  Motor Control Centers or likewise called MCC's, are an assembly of one or more enclosed sections, that have a common power bus principally containing motor control units. They have been used since the 1950's by the automobile industry, since they ...

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