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Transformer Theory
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A transformer is an energy transfer device. It has an input side (primary) and an output side (secondary). Electrical energy applied to the primary is converted to a magnetic field which in turn, induces a current in the secondary which carries energy to the load connected to the secondary. The energy applied to the primary must be in the form of a changing voltage which creates a constantly changing current in the primary, since only a changing magnetic field will produce a current in the secondary. Products & Services
Voltage transformers and potential transformers are used to measure voltage in electric circuits. Their main role is to condition (step down) the voltage to be measured to levels suitable for the measuring instrument.
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Toroidal transformers typically consist of copper wire wrapped around a cylindrical core. This design prevents the magnetic flux that occurs within the coil from leaking.
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Current transformers are used to step down current in a very predictable fashion with respect to current and phase. They are generally used as inputs to current instruments.
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RF transformers transfer energy from one circuit to another by electromagnetic induction. Typically, they are used to increase or decrease voltage as it passes from one side through the other.
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Power transformers convert power-level voltages from one level or phase configuration to another. They can include features for electrical isolation, power distribution, and control and instrumentation applications.
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Topics of Interest
Another means of changing output voltage in a transformer is to alter the physical orientation of the primary and secondary relative to each other. In a transformer the primary windings produce a...
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An LVDT is much like any other transformer in that it consists of a primary coil, secondary coils, and a magnetic core. An alternating current, known as the carrier signal, is produced in the primary...
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CONSTRUCTION, TYPES, AND CHARACTERISTICS
1. A transformer is an apparatus for converting electrical power in an ac system at one voltage or current into electrical power at some other voltage or...
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Static transfer switches (STS) are used as either primary or secondary side switches in high availability dual-bus configurations. For primary side switching, the STS is connected to the primary or...
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15.1 Winding Polarity
A transformer consists of two windings viz., primary and secondary coupled to a common magnetic core. International standards define the polarity of the primary and secondary...
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