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  2. 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.

  3. Transformer types - Wikipedia

    en.wikipedia.org/wiki/Transformer_types

    The equivalent power rating of the autotransformer is lower than the actual load power rating. It is calculated by: load VA × (|Vin – Vout|)/Vin. [2] For example, an auto transformer that adapts a 1000 VA load rated at 120 volts to a 240 volt supply has an equivalent rating of at least: 1,000 VA (240 V – 120 V) / 240 V = 500 VA.

  4. Category:Electric transformers - Wikipedia

    en.wikipedia.org/wiki/Category:Electric_transformers

    This category has the following 2 subcategories, out of 2 total. ... (34 P) E. Electric transformer manufacturers (12 P) Pages in category "Electric transformers ...

  5. Voltage transformer - Wikipedia

    en.wikipedia.org/wiki/Voltage_transformer

    Transformer winding primary (usually high-voltage) connecting wires are of many types. They may be labeled as H 1, H 2 (sometimes H 0 if it is internally designed to be grounded) and X 1, X2 and sometimes an X 3 tap may be present. Sometimes a second isolated winding (Y 1, Y 2, Y 3) (and third (Z 1, Z 2, Z 3) may also be available on the same ...

  6. Cross and circle game - Wikipedia

    en.wikipedia.org/wiki/Cross_and_circle_game

    Mayan cross and circle boards have been found on stones from the 7th century AD. [5] Although frequently encountered among the native tribes of North America (particularly as a "quartered circle" design) these boards were not made of durable materials, so generally the writings and collections of European-Americans constitute their earliest ...

  7. Circle diagram - Wikipedia

    en.wikipedia.org/wiki/Circle_diagram

    The circle diagram can be drawn for alternators, synchronous motors, transformers, induction motors. The Heyland diagram is an approximate representation of a circle diagram applied to induction motors, which assumes that stator input voltage, rotor resistance and rotor reactance are constant and stator resistance and core loss are zero.

  8. Stacking factor - Wikipedia

    en.wikipedia.org/wiki/Stacking_factor

    The stacking factor (also lamination factor or space factor [1]) is a measure used in electrical transformer design and some other electrical machines. It is the ratio of the effective cross-sectional area of the transformer core to the physical cross-sectional area of the transformer core. The two are different because of the way cores are ...

  9. Compensation winding - Wikipedia

    en.wikipedia.org/wiki/Compensation_Winding

    Figure A. shows a cross-sectional view of a two pole DC shunt motor. Armature windings (A), field windings (F) and compensation windings (C) use the dot and cross convention where a circle with a dot is a wire carrying current out of the figure and a circle with a cross is a wire carrying current into the page.