- a person or thing that transforms
- Elec. a device consisting essentially of two or more coils of insulated wire, that transfers alternating-current energy by electromagnetic induction from one winding to another at the same frequency but usually with changed voltage and current values
transformer The increase or decrease in the voltage of a signal is related to the ratio of the number of turns of wire in the coils. In the upper transformer, the outgoing voltage is doubled because the secondary coil has twice as many turns as the first.
- An example of a transformer is a fictional creature that changes from a person into a dog.
- An example of a transformer is a device that uses electromagnetic induction.
The definition of a transformer is a person or thing that changes, or a device with two or more coils of wire that transfer alternating current energy from one coil to another at the same frequency but with changed voltage.
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transformer
Webster's New World College Dictionary, Fifth Edition Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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transformer
noun
- One that transforms: a transformer of recruits into soldiers.
- A device used to transfer electric energy from one circuit to another, especially a pair of multiply wound, inductively coupled wire coils that effect such a transfer with a change in voltage, current, phase, or other electric characteristic.
transformer
iron-core transformer
THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION by the Editors of the American Heritage Dictionaries. Copyright © 2016, 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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transformer. (n.d.). Retrieved November 21st, 2018, from https://www.yourdictionary.com/transformer
A device used to change the voltage of an alternating current in one circuit to a different voltage in a second circuit, or to partially isolate two circuits from each other. Transformers consist of two or more coils of conducting material, such as wire, wrapped around a core (often made of iron). The magnetic field produced by an alternating current in one coil induces a similar current in the other coils.
Compare converter
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Noun
(plural transformers)
- Something that transforms, changing its own or another thing's shape.
- (electrical engineering) A static device that transfers electric energy from one circuit to another by magnetic coupling. Their main use is to transfer energy between different voltage levels, which allows choosing most appropriate voltage for power generation, transmission and distribution separately.
Origin
transform + -er
English Wiktionary. Available under CC-BY-SA license.
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transformer - Computer Definition
A static device that couples two circuits for the purpose of transferring alternating current (AC) from one circuit to another by electromagnetic induction. The current remains at the same frequency, but may change in voltage, phase, or impedance values.A transformer comprises two or more wire coils, or windings, but no moving parts.The voltage induced in a coil on a transformer is proportional to the number of turns around the core. See also AC, frequency, impedance, inductance, phase, and voltage.
Webster's New World Telecom Dictionary Copyright © 2010 by Wiley Publishing, Inc., Indianapolis, Indiana.
Used by arrangement with John Wiley & Sons, Inc.
Used by arrangement with John Wiley & Sons, Inc.
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A device that is mostly used to change the voltage in an alternating current (AC); however, it can also be used to maintain the same voltage but act as an electrical isolator. The most common type is the laminated core transformer found in power supplies. Made of steel laminations wrapped with two coils of wire, the ratio of windings between the "primary" input coil and the "secondary" output coil determines the voltage change. For example, if the primary has 1,000 windings and the secondary 100, an input of 120 volts is changed to 12v. Via ElectroMagnetic Induction There are numerous transformer architectures, and they span the size gamut. Small ones are used in the myriad black boxes that plug into the wall and create low DC voltage for every electronic gadget, while transformers weighing tons are used to transmit 50,000 volts of AC over the nation's power grid. However, they all work via electromagnetic induction. The changing current in the primary coil induces a voltage across the secondary coil. Switching Power Supplies The greater the current needed to power the device, the thicker the wire in the coils and the larger the transformer. However, if a high frequency is used, the number of windings can be reduced to make the transformer small. To accomplish this, the incoming voltage is converted to DC (rectified), and a high-frequency oscillator pulses a transistor that passes the rectified voltage as square waves into a "pulse transformer." The on/off DC pulses cause the changing current in the primary coil just the same as AC does. This square wave generation turns a power supply into a "switching power supply." See power adapter, power supply and wall wart.
The Switching Power Supply
In order to reduce the number of windings in transformer coils, a high frequency pulse transformer is used. This is a hypothetical example; voltages and frequencies vary. For example, the oscillator can generate frequencies from 1 kHz to 200 kHz. Following is a simplified circuit diagram of this power supply.
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