Ian Christian Hovey

US Patent:

8405262, Mar 26, 2013

Filed:

Nov 30, 2011

Appl. No.:

13/307711

Inventors:

Reinhard Beatty - Blacksburg VA, US
Bradley A. Trago - Blacksburg VA, US
Gerald W. Brown - Radford VA, US
Ian Hovey - Christiansburg VA, US
Ron Bishop - Radford VA, US

Assignee:

Kollmorgen Corporation - Radford VA

International Classification:

H02K 9/19

US Classification:

310 58, 310 60 A, 310 64

Abstract:

The stator of a fluid cooled electric machine, such as a motor, a generator, or a motor/generator assembly, includes an annular stator core including inwardly projecting teeth and external grooves in an outer surface of the core that are radially aligned with the teeth. Electrically conductive windings are mounted on the inwardly projecting teeth, and a pipe assembly for coolant has a pipe formed into a serpentine shape. The pipe includes axially extending pipe portions received in the external stator core grooves, and end turns interconnecting adjacent pairs of the axially extending pipe portions. Heat conduction elements are secured to the end turns of the coolant pipe, and a housing surrounding the outer surface of the stator core retains the axially extending pipe portions within the external grooves.

US Patent:

20120175977, Jul 12, 2012

Filed:

Jan 12, 2011

Appl. No.:

13/005010

Inventors:

Reinhard Beatty - Blacksburg VA, US
Ian Hovey - Christiansburg VA, US

Assignee:

Kollmorgen Corporation - Radford VA

International Classification:

H02K 9/00

US Classification:

310 58

Abstract:

A coolant flow enhancing device is provided to increase electric machine coil cooling at coil end turn locations. Such a device is incorporated into an overall fluid cooled electric machine that has phase separators extending through slots between stator teeth. The device includes flow deflectors located at ends of the phase separators. Each of the flow deflectors is designed so that a contour of its interior surface follows an outer contour of a corresponding one of the end turns to both maximize a cooling fluid flow rate past the one of the end turns and minimize separation of the fluid from the one of the end turns.