Multi-phase autotransformer
First Claim
Patent Images
1. A transformer comprising:
- a core that includes a first leg, a second leg, and a third leg; and
a plurality of conductor lines in which each conductor line in the plurality of conductor lines comprises at least three windings wound around the core such that a phase voltage at an output connection point associated with a corresponding conductor line of the plurality of conductor lines is a percentage of a line voltage for the corresponding conductor line and such that harmonic currents are reduced, wherein harmonic currents mitigation increases as a number of windings included in the at least three windings increases;
wherein one winding on one leg includes two sub-windings; and
wherein each conductor line has a first end and a second end, the second end being tied in common to each other and the first end for receiving one phase of three phases of a power source and wherein the two sub-windings include a tap therebetween as an output of one of the three phases of the transformer.
1 Assignment
0 Petitions
Accused Products
Abstract
A transformer comprising a core and a plurality of conductor lines. Each conductor line in the plurality of conductor lines comprises at least three windings wound around the core such that a phase voltage at an output connection point associated with a corresponding conductor line of the plurality of conductor lines is substantially a selected percentage of a line voltage for the corresponding conductor line and such that harmonic currents are reduced to within selected tolerances.
-
Citations
29 Claims
-
1. A transformer comprising:
-
a core that includes a first leg, a second leg, and a third leg; and a plurality of conductor lines in which each conductor line in the plurality of conductor lines comprises at least three windings wound around the core such that a phase voltage at an output connection point associated with a corresponding conductor line of the plurality of conductor lines is a percentage of a line voltage for the corresponding conductor line and such that harmonic currents are reduced, wherein harmonic currents mitigation increases as a number of windings included in the at least three windings increases; wherein one winding on one leg includes two sub-windings; and wherein each conductor line has a first end and a second end, the second end being tied in common to each other and the first end for receiving one phase of three phases of a power source and wherein the two sub-windings include a tap therebetween as an output of one of the three phases of the transformer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A transformer comprising:
-
a core that includes a first leg, a second leg, and a third leg; a first conductor line comprising a first plurality of windings that includes at least two windings of at least two phases between a neutral point and a first output connection point associated with the first conductor line; a second conductor line comprising a second plurality of windings that includes at least two windings of at least two phases between the neutral point and a second output connection point associated with the second conductor line; and a third conductor line comprising a third plurality of windings that includes at least two windings of at least two phases between the neutral point and a third output connection point associated with the third conductor line, wherein harmonic currents mitigation increases as a number of windings included in the first plurality of windings, the second plurality of windings and the third plurality of windings increases; wherein the first conductor line, the second conductor line, and the third conductor line are wound in a zigzag fashion around the first leg, the second leg, and the third leg such that each conductor line includes four windings, wherein one leg includes two windings, and two legs each include one winding of the four windings thereon, and such that each leg includes four windings thereon. - View Dependent Claims (12, 13, 14)
-
-
15. A transformer comprising:
-
a core that has a first leg, a second leg, and a third leg; a first conductor line comprising a first plurality of windings that includes at least three windings; a second conductor line comprising a second plurality of windings that includes at least three windings; and a third conductor line comprising a third plurality of windings that includes at least three windings, wherein the first plurality of windings, the second plurality of windings, and the third plurality of windings are wound around the core such that a phase of each winding of the first conductor line, the second conductor line, and the third conductor line is consistent with a wye line configuration, wherein harmonic currents mitigation increases as a number of windings included in the first plurality of windings, the second plurality of windings and the third plurality of windings increases; wherein the first conductor line, the second conductor line, and the third conductor line are wound in a zigzag fashion around the first leg, the second leg, and the third leg such that each conductor line includes four windings, wherein one leg includes two windings, and two legs each include one winding of the four windings thereon, and such that each leg includes four windings thereon. - View Dependent Claims (16, 17, 18, 19)
-
-
20. A multi-phase auto-transformer for improving power quality and mitigating electromagnetic interferences comprising:
-
a core that includes a first leg, a second leg, and a third leg; and a first conductor line, a second conductor line, and a third conductor line, each conductor line being wound in a zigzag fashion around the first leg, the second leg and the third leg such that each conductor line includes four windings, wherein one leg includes two windings and two legs include each one winding of the four windings thereon, and such that each leg includes four windings thereon. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
-
Specification