Darrell D Morrison

US Patent:

59329483, Aug 3, 1999

Filed:

Sep 22, 1998

Appl. No.:

9/158368

Inventors:

Darrell Morrison - Mankato MN
Craig Peterson - North Mankato MN

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

H02K 348

US Classification:

310214

Abstract:

A V-block assembly for an electrical machine having a rotor with a spider and poles disposed in a circular array around the spider and conductive windings encircling the poles comprising a dovetail groove in the spider between adjacent poles and a plurality of V-blocks each comprising a pair of flat bars having one end abutting, the abutting end being formed to fit the dovetail, the flat bars being bent outwardly to form a V and a jack screw fastened between the flat bars adjacent the open end to press the bars against the windings of adjacent poles to prevent the windings from moving laterally and radially outward as the rotor rotates.

US Patent:

59988932, Dec 7, 1999

Filed:

Dec 3, 1998

Appl. No.:

9/204672

Inventors:

John T. Fowler - Mankato MN
Darrell R. Morrison - Mankato MN

International Classification:

H02K 1100

US Classification:

310 68R

Abstract:

An integral heat sink and fan rectifier assembly comprises a disk fastened to a rotor of a synchronous motor or generator, the disk having a central bore, a plurality of fan blades disposed on the outer periphery and a circular array of recesses that receive insulation encapsulated rectifier units that are fastened to the disk and a have a heat transfer plates that engage the bottom of the recesses to transfer heat to the disk which conducts the transferred heat to the fan blades, which transfer the heat to the cooling air as rotor rotates and blows cooling air through a portion of the motor or generator.

US Patent:

60547901, Apr 25, 2000

Filed:

Mar 23, 1999

Appl. No.:

9/274541

Inventors:

Pete Kjeer - Mankato MN
Darrell R. Morrison - Mankato MN

Assignee:

Emerson Electric Co. - St. Louis MO

International Classification:

H02K 348

US Classification:

310214

Abstract:

A V-block with a preselected shape defining a preselected included angle between a pair of V-block side portions is connected to a laminated spider of a rotor at preselected location between spaced apart adjacent poles of the rotor by disposing an elongated connecting piece in a slot longitudinally disposed in the spider and connecting the elongated connecting piece to the V-block by a fastener. Applying a preselected torque to the fastener establishes a predetermined force between the V-block and the conductive windings disposed about adjacent poles. The V-block arrangement is particularly suited for use in a dynamo-electric machine.

US Patent:

20160276896, Sep 22, 2016

Filed:

Mar 18, 2015

Appl. No.:

14/662084

Inventors:

Darrell Morrison - Eagle Lake MN, US

International Classification:

H02K 7/00
F03D 9/00
H02K 7/18

Abstract:

A superconducting electrical machine includes a rotor and a stator. The stator defines a cavity. The rotor is configured to rotate about a longitudinal axis. The rotor is disposed at least partially within the cavity. The rotor includes a shaft configured to rotate with the rotor, a rotor active section including at least a rotor torque tube and a superconductor, and a first re-entrant end attaching the shaft to the rotor active section. At most a threshold fraction of a bending force applied to the shaft is communicated to the rotor active section.

US Patent:

20160276906, Sep 22, 2016

Filed:

Mar 18, 2015

Appl. No.:

14/662054

Inventors:

Darrell Morrison - Eagle Lake MN, US
Ted Daly - Eagle Lake MN, US

International Classification:

H02K 9/20

Abstract:

A superconducting electrical machine includes a rotor and a stator. The rotor includes rotor windings configured to superconduct when cooled in a rotor cryostat to a temperature no greater than a rotor superconducting temperature. The stator includes a stator windings configured to superconduct when cooled in a stator cryostat to a temperature no greater than a stator superconducting temperature. The rotor cryostat surrounds the rotor and is configured to allow transport of a first coolant through a plurality of conduits adjacent to the rotor windings in order to draw heat from the rotor windings and reduce the temperature of the rotor windings to a temperature no greater than the rotor superconducting temperature. The stator cryostat surrounds the stator and is configured to allow transport of a second coolant through a plurality of conduits adjacent to the stator windings in order to draw heat from the stator windings and reduce the temperature of the stator windings to a temperature no greater than the stator superconducting temperature.

US Patent:

20160276918, Sep 22, 2016

Filed:

Mar 18, 2015

Appl. No.:

14/662064

Inventors:

Darrell Morrison - Eagle Lake MN, US

International Classification:

H02K 55/00
F28F 13/00
H02K 9/22

Abstract:

A superconducting electrical machine includes at least one re-entrant end including at least two segments. The at least two segments are continuous. At least one re-entrant end may be included in a stator of the superconducting electrical machine, the stator being disposed substantially coannular with a longitudinal axis. At least one re-entrant end may also be included in a rotor of the superconducting electrical machine, the rotor being configured to rotate about a longitudinal axis. A first segment is substantially perpendicular to a plane parallel to the longitudinal axis, and a second segment is coannular with the longitudinal axis. Heat distal from rotor windings and/or stator windings encounters a thermal resistance provided by the at least two segments as the heat travels towards the rotor windings and/or stator windings.

US Patent:

20160204667, Jul 14, 2016

Filed:

Jan 9, 2015

Appl. No.:

14/593928

Inventors:

Darrell Morrison - Eagle Lake MN, US
Keith T. Dennehy - Winona MN, US

International Classification:

H02K 3/30

Abstract:

A superconducting electrical machine includes a stator and a rotor configured to rotate in a cavity defined by the stator. The rotor and the stator each include superconducting windings. The rotor and the stator also each include a composite configured to compensate for a volume change of various components of the rotor and stator during a change in temperature from a first temperature to a second temperature.