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US 7,256,677 B2Granted
Transformer having a stacked core with a cruciform leg and a method of making the same
AssigneeABB Technology AG
InventorsWilliam E. Pauley, Jr., Charlie H. Sarver, Rush B. Horton, Jr.
Life of this patent
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Abstract
The present invention is directed to a transformer having a stacked core, which includes upper and lower yokes and first and second outer legs. The core also includes one or more inner legs. Each of the upper and lower yokes is formed from a stack of plates and has a rectangular cross-section. Each inner leg is formed from a stack of plates and has a cruciform cross-section. Each of the first and second outer legs is formed from a stack of plates and may have a cruciform cross-section.
Claims20
A transformer comprising:
- (a.) a core comprising:
- a first yoke comprising a stack of plates and having an outer side and an inner side with a groove formed therein, said groove extending in a stacking direction of the plates and being located inwardly from the outer side, said plates having the same width so as to provide the first yoke with a rectangular cross-section;
- a second yoke comprising a stack of plates and having an outer side and an inner side with a groove formed therein, said groove extending in the stacking direction of the plates and being located inwardly from the outer side;
- an inner leg having a first end disposed in the groove of the first yoke and a second end disposed in the groove of the second yoke, said inner leg having a cruciform cross-section and comprising a stack of plates with different widths;
- and
- (b.) a coil winding mounted to the inner leg.
3 more elements
A transformer comprising:
- (a.) a core comprising:
- a first yoke comprising a stack of plates having the same width so as to provide the first yoke with a rectangular cross-section;
- a second yoke;
- a leg with first and second ends and extending between the first and second yokes, the leg having a cruciform cross-section and comprising a stack of plates with different widths, wherein the plates of the leg form joints with the first yoke at the first end of the leg and the plates of the leg form joints with the second yoke at the second end of the leg;
- and
- (b.) a coil winding mounted to the leg.
3 more elements
Dependencies are inferred from the claim text.