What are the different types of transformers and what are their uses?

can you give me a site where i can get a lot of details about transformers?|||Megatron is a the bad guy, and his followers are deceptacons. Optimus Prime is the good guy





hehehe...sorry|||Power, Audio, and RF... plus more odd ones...|||There are two. Both descended from a larger culture that has been all but destroyed and lost because of the actions of the one kind: The Decepticons. The Decepticons sought ever growing levels of power, authority and control in their society and were quick to erase any sub routines in their machinery that would hinder this process. The autobots on the other hand follow The Source, the mythological (until the first movie) source of all the Transformer's power. The Source created and empowered the very first Transformers. Though later, more complex and powerful Transformers required Energon to maintain themselves in their advanced working order, often with very complex machinery and technology. The Decepticons cannot be trusted and are only useful as far as they can be mislead and manipulated. The Autobots honor and respect all life and though they are occasionally weaker and less resourceful than the Decepticons, they are "good" and have in their possession as their ward the original form of The Source, protecting it as well as other life in the universe from being scavenged or destroyed by the Decepticons.|||thx alot for visiting the site is http://www.abb.com or http://www.insideabb.com|||There is a wide variety of transformers, and an exhaustive list would be pretty exhausting here. The primary groups are step-up, step-down, interstage, audio output, audio input, or RF input, I-F transformers, high frequency oscillators, inverter transformers, "auto" transformers, variable transformers, and isolation transformers.


The step-up transformers do exactly as the name implies, they transform one voltage to a higher voltage. An "auto" transformer is a type of transformer that was used in vehicles for the ignition coil. This type of transformer was not only a step-up transformer, but the primary and secondary coils were connected together at the ground side of the coils. Step-down transformers lower a voltage from a higher voltage to a lower voltage. This type of transformer is used in 'linear' power supplies, power distribution transformers as those seen on telephone poles, or in welding machines. The lower voltage also results in a much higher amperage. For a power distribution transformer, 2400 volts ac at 20 amps of current results in 240 volts ac at 200 amps of current. Except for the small losses due to heating of the iron core due to eddy currents in the metal, the power put into the transformer will be the power drawn from the transformer.


The I-F transformer is used in radio circuits, the interstage transformer is used to couple 2 sections of an amplifier together. These are not generally used any more due to an easier way to couple stages together, and avoid the losses imposed by the transformers. The oscillator, and inverter transformers are used where a DC voltage is needed to be made into a different voltage. This is how the voltages for a computer are created. Input transformers are used to couple a signal into a device, such as into an amplifier from a microphone. The isolation transformer is usually designed to simply keep the wall outlet power separated from the device being powered. These are made so that the value of the input voltage is developed in the output of the transformer. A variable transformer is made so that the output voltage can be changed from 0 volts to about that of the applied voltage to the transformer. This is another type of "auto" transformer since the primary, or input of the transformer, and the output, or secondary are connected together at the ground side of the 2 coils that make up the transformer. The difference for the variable transformer is that the primary coil is tapped by a moveable arm that is moved along the top of the primary coil that has had the insulation removed. There really is not a true secondary coil for the variable transformer.


While this is a very general coverage of transformers, a web search would give you even more information as well as operating considerations for various types of transformers. So far as a site is concerned, try the website for the ARRL. Thorardson might be a good site since they make transformers, or Triad.