Edward F Pleva

US Patent:

7119646, Oct 10, 2006

Filed:

Dec 18, 2001

Appl. No.:

10/017381

Inventors:

Thomas Golner - Pewaukee MI, US
Edward Pleva - Waukesha WI, US
Shirish Mehta - Waukesha WI, US

Assignee:

Waukesha Electric Systems, Incorporated - Waukesha WI

International Classification:

H01F 27/32

US Classification:

336 84C

Abstract:

An apparatus for controlling the temperature of a core of a transformer is provided that includes a core, a shield surrounding the core, a cast formed between the core and the shield, and tubing positioned on the shield. The cast directs heat from the core to the shield and cooling fluid is directed through the tubing to cool the shield.

US Patent:

20050081538, Apr 21, 2005

Filed:

Oct 20, 2003

Appl. No.:

10/687619

Inventors:

Edward Pleva - Waukesha WI, US

International Classification:

F17C013/00
F25D017/06

US Classification:

062093000, 062050700

Abstract:

A low-leakage enclosure for cryogenic compressor apparatus includes climate control equipment and guide fixtures to direct ultra-cold coolant lines to a superconducting utility power transformer. The self-contained system maintains the required number of high performance chillers within a narrow temperature range to ensure reliable operation in an unprotected outdoor environment. The enclosure advances the technology of superconducting power systems closer to final deployable status.

US Patent:

20080248283, Oct 9, 2008

Filed:

Apr 5, 2007

Appl. No.:

11/783104

Inventors:

Thomas M. Golner - Pewaukee WI, US
Shirish P. Mehta - Waukesha WI, US
Edward F. Pleva - Waukesha WI, US

International Classification:

B32B 5/22
B29C 44/58
B29C 67/00

US Classification:

4283179, 264 464, 425 4 R

Abstract:

A structural and insulating material for cryogenic power transformers uses nonwoven fibers, such as polyester matting, embedded within epoxy made highly porous with a blowing agent. The open cell foam of the material is characterized by controlled pore size and density, tolerance of extreme thermal gradients, and strength at cryogenic temperatures, and is selected for compatibility with dielectric fluids such as liquid nitrogen and cryogenic blends.