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  2. Autotransformer - Wikipedia

    en.wikipedia.org/wiki/Autotransformer

    In electrical engineering, an autotransformer is an electrical transformer with only one winding. The "auto" (Greek for "self") prefix refers to the single coil acting alone. In an autotransformer, portions of the same winding act as both the primary winding and secondary winding sides of the transformer. In contrast, an ordinary transformer ...

  3. Transformer - Wikipedia

    en.wikipedia.org/wiki/Transformer

    In electrical engineering, a transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits.A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force (EMF) across any other coils wound around the same core.

  4. Extra-low voltage - Wikipedia

    en.wikipedia.org/wiki/Extra-low_voltage

    The design of a SELV circuit typically involves an isolating transformer, guaranteed minimum distances between conductors and electrical insulation barriers. The electrical connectors of SELV circuits should be designed such that they do not mate with connectors commonly used for non-SELV circuits.

  5. Current transformer - Wikipedia

    en.wikipedia.org/wiki/Current_transformer

    A high-voltage current transformer may contain several cores, each with a secondary winding, for different purposes (such as metering circuits, control, or protection). [7] A neutral current transformer is used as earth fault protection to measure any fault current flowing through the neutral line from the wye neutral point of a transformer.

  6. Transformer types - Wikipedia

    en.wikipedia.org/wiki/Transformer_types

    A planar transformer Exploded view: the spiral primary "winding" on one side of the PCB (the spiral secondary "winding" is on the other side of the PCB) Manufacturers either use flat copper sheets or etch spiral patterns on a printed circuit board to form the "windings" of a planar transformer, replacing the turns of wire used to make other ...

  7. Blocking oscillator - Wikipedia

    en.wikipedia.org/wiki/Blocking_oscillator

    For an ideal transformer operating under ideal conditions, I s = I p /N, V s = N×V p. L p, primary (self-)inductance, a value determined by the number of primary turns N p squared, and an "inductance factor" A L. Self-inductance is often written as L p = A L ×N p 2 ×10 −9 henries. [1] R, combined switch and primary resistance

  8. Oudin coil - Wikipedia

    en.wikipedia.org/wiki/Oudin_coil

    Oudin coil used for medical electrotherapy, 1907, and a schematic diagram of its circuit (left).. An Oudin coil, also called an Oudin oscillator or Oudin resonator, is a resonant transformer circuit that generates very high voltage, high frequency alternating current (AC) electricity at low current levels, [1] [2] [3] used in the obsolete forms of electrotherapy around the turn of the 20th ...

  9. Tesla coil - Wikipedia

    en.wikipedia.org/wiki/Tesla_coil

    A Tesla coil is an electrical resonant transformer circuit designed by inventor Nikola Tesla in 1891. [1] It is used to produce high-voltage, low-current, high-frequency alternating-current electricity. [2] [3] Tesla experimented with a number of different configurations consisting of two, or sometimes three, coupled resonant electric circuits.

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