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  2. Leakage inductance - Wikipedia

    en.wikipedia.org/wiki/Leakage_inductance

    L P σ & L S σ are primary & secondary leakage inductances, corresponding to primary & secondary leakage reactances X P σ & X S σ. The transformer can be expressed more conveniently as the equivalent circuit in Fig. 3 with secondary constants referred (i.e., with prime superscript notation) to the primary, [25] [26]

  3. Transformer - Wikipedia

    en.wikipedia.org/wiki/Transformer

    Ideal transformer connected with source V P on primary and load impedance Z L on secondary, where 0 < Z L < ∞. Ideal transformer and induction law [ d ] A varying current in the transformer's primary winding creates a varying magnetic flux in the transformer core, which is also encircled by the secondary winding.

  4. Scott-T transformer - Wikipedia

    en.wikipedia.org/wiki/Scott-T_transformer

    The Scott-T transformer connection may also be used in a back-to-back T-to-T arrangement for a three-phase to three-phase connection. This is a cost-saving in the lower-power transformers due to the two-coil T connected to a secondary two-coil T instead of the traditional three-coil primary to three-coil secondary transformer.

  5. Short-circuit inductance - Wikipedia

    en.wikipedia.org/wiki/Short-circuit_inductance

    is the corresponding open-circuit measurement of primary or secondary inductance; Other transformer parameters like leakage inductance and mutual inductance which cannot be directly measured may be defined in terms of k. Short-circuit inductance is one of the parameters that determines the resonance frequency of the magnetic phase synchronous ...

  6. Current transformer - Wikipedia

    en.wikipedia.org/wiki/Current_transformer

    A current transformer (CT) is a type of transformer that is used to reduce or multiply an alternating current (AC). It produces a current in its secondary which is proportional to the current in its primary. Current transformers, along with voltage or potential transformers, are instrument transformers.

  7. Blocking oscillator - Wikipedia

    en.wikipedia.org/wiki/Blocking_oscillator

    The changing primary current causes a changing magnetic field ("flux") through the transformer's windings; this changing field induces a (relatively) steady secondary voltage V s = N×V b. In some designs (as shown in the diagrams) the secondary voltage V s adds to the source voltage V b ; in this case because the voltage across the primary ...

  8. Transformer types - Wikipedia

    en.wikipedia.org/wiki/Transformer_types

    A leakage transformer, also called a stray-field transformer, has a significantly higher leakage inductance than other transformers, sometimes increased by a magnetic bypass or shunt in its core between primary and secondary, which is sometimes adjustable with a set screw. This provides a transformer with an inherent current limitation due to ...

  9. Delta-wye transformer - Wikipedia

    en.wikipedia.org/wiki/Delta-wye_transformer

    A delta-wye transformer is a type of three-phase electric power transformer design that employs delta-connected windings on its primary and wye/star connected windings on its secondary. A neutral wire can be provided on wye output side. It can be a single three-phase transformer, or built from three independent single-phase units.

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