Autotransformer rectifier unit
AssigneeGoodrich Control Systems Limited
InventorsVirgilio VALDIVIA-GUERRERO, Daniel DIAZ-LOPEZ, Joshua PARKIN
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Abstract
The present improvement essentially integrates a DC link inductance within an interphase power transformer (IPT). The integration is achieved by creating auxiliary magnetic paths for leakage inductance inside the IPT core. The magnetic path can be created, for example, by incorporating extra portions of magnetic material commonly referred to hereinafter as shunts. The IPT flux shared between windings does not cross these shunts. Therefore, this magnetic path increases the self-inductance of the IPT but does not contribute to the mutual inductance between windings. This extra magnetic path allows for leakage inductance of a much higher quantity than that achievable with a conventional IPT.
Claims12
An interphase transformer comprising:
- a core defining three or more limbs (N1-Nn);
- and
- a winding provided around each limb;
- characterised by means incorporated in or on said core for creating auxiliary magnetic paths for flux generated by at least one of the windings.
A system for converting AC electric power to DC electric power, the system comprising:
- an n×6 pulse autotransformer, where n is an integer of 3 or more;
- n rectifier bridges;
- and
- two interphase transformers (IPT1, IPT2) comprising n limbs (N1-Nn) with windings there around, at least a first one of said two interphase transformers being an interphase transformer comprising:
- a core defining three or more limbs (N1-Nn);
- and
- a winding provided around each limb;
- characterised by means incorporated in or on said core for creating auxiliary magnetic paths for flux generated by at least one of the windings.
A method of providing a smoothing choke effect to an AC to DC power converter, the method comprising:
- providing an the AC to DC power converter, the converter including an interphase transformer;
- and
- creating auxiliary magnetic paths in the interphase transformer of the AC to DC power converter.
Dependencies are inferred from the claim text.