LANDIS E FEATHER
Engineers in Hermitage, PA
License number
Pennsylvania PE008109E
Category
Engineers
Type
Professional Engineer
Address
Address
Hermitage, PA 16148
Professional information
High-Voltage Windings For Shell-Form Power Transformers
US Patent:
4859978, Aug 22, 1989
Filed:
Apr 29, 1988
Appl. No.:
7/188239
Inventors:
Landis E. Feather - Hermitage PA
Ramsis S. Girgis - Mars PA
Leach S. McCormick - Pittsburgh PA
Andreas M. Sletten - Pittsburgh PA
Ramsis S. Girgis - Mars PA
Leach S. McCormick - Pittsburgh PA
Andreas M. Sletten - Pittsburgh PA
Assignee:
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
H01F 2728
US Classification:
336186
Abstract:
A high voltage electrical winding for shell form transformers is disclosed that reduces eddy current and circulating current losses within the winding. The winding is fabricated from an elongated conductor bundle that is spirally wound into a plurality of turns. The conductor bundle is formed from a multiplicity of enamel coated elongated conductor strands arranged in side by side relation. Each of the conductor strands has a rectangular cross section with a thickness of less than approximately 40 mils between contacting surfaces. The strand's cross sectional height is preferably less than 120 mils. The conductor strands are mounted side by side such that their respective contact surfaces abut. The conductor bundle is preferably wrapped in an adhesive tape to give the bundle some structural support and to provide insulation between winding turns. The disclosed winding also has very good mechanical strength and impulse distribution.
High-Voltage Winding For Core-Form Power Transformers
US Patent:
4864266, Sep 5, 1989
Filed:
Nov 29, 1988
Appl. No.:
7/277554
Inventors:
Landis E. Feather - Hermitage PA
Paul W. Martincic - Hermitage Township PA
Richard D. Holm - Penn Hills Township PA
Richard E. Thompson - Muncie IN
Paul W. Martincic - Hermitage Township PA
Richard D. Holm - Penn Hills Township PA
Richard E. Thompson - Muncie IN
Assignee:
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
H01F 2112, H01F 2718
US Classification:
336150
Abstract:
A high-voltage winding for core-form power transformers is disclosed that uses two different conductor configurations within a single coil to minimize eddy current losses. The winding includes a first elongated conductor bundle formed from a plurality of thin enamel coated conductor ribbons arranged in side by side relation. A plurality of second elongated conductor bundles are each formed from at least one bundle section having a multiplicity of elongated insulated conductor strands arranged in side by side relation. Each of the conductor strands is less than 40 mils thick. The coil includes a top end section, a body section and a bottom end section. The body section is spirally wound with the first conductor bundle. The top and bottom end sections are wound with the second conductor bundles. In windings that include tap connectors, the tap section is also wound with one of the second conductor bundles.