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Summing transformer for star-delta inverter having a single secondary winding for each group of primary windings

  • US 5,177,460 A
  • Filed: 01/04/1990
  • Issued: 01/05/1993
  • Est. Priority Date: 01/04/1990
  • Status: Expired due to Fees
First Claim
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1. A summing transformer comprising:

  • a plurality of spaced core elements, each core element comprising first, second, and third principal legs;

    a separate set of primary windings associated with each core element, each of the sets of primary windings consisting only of first, second, and third primary windings wrapped about the periphery of the first, second, and third principal legs, respectively, the primary windings in each set being connected directly to windings only from the associated core element and not directly to windings from other sets or other core elements;

    a first secondary winding wound about the first principal legs of the core elements;

    a second secondary winding wound about the second principal legs of the core elements; and

    a third secondary winding wound about the third principal legs of the core elements.

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