David J Fleming

US Patent:

6630752, Oct 7, 2003

Filed:

Sep 12, 2001

Appl. No.:

09/955405

Inventors:

David J. Fleming - Cardiff CA
Hassan Yarpezeshkan - La Jolla CA

Assignee:

Qualmag, Inc. - San Diego CA

International Classification:

H02J 400

US Classification:

307 64, 307 70, 307 80, 307 85

Abstract:

An uninterruptible transfer switch (UTS) coupled to two or more power sources and a load, said UTS including switches and an inverter, powered through one of several sources routed through rectifiers, capable of sensing power quality of two or more power sources and automatically switching sources when the primary power source is degraded to a predetermined limit and the switching of sources occurring without appreciable power loss on the load side of the UTS.

US Patent:

20030048005, Mar 13, 2003

Filed:

Dec 3, 2001

Appl. No.:

10/005059

Inventors:

Andrew Goldin - Temecula CA, US
Hassan Yarpezeshkan - La Jolla CA, US
David Fleming - Cardiff CA, US

International Classification:

H02J007/00

US Classification:

307/064000

Abstract:

A system and method for providing power to critical from a plurality of sources. The system provides a means of eliminating harmonics generated by loads from being conducted into the power source(s). Additionally, the system provides power conditioning to sags, surges and spikes produced by incoming sources. Power quality and system status monitoring and control are provided via communication mean such as the Internet.

US Patent:

50945696, Mar 10, 1992

Filed:

Nov 30, 1990

Appl. No.:

7/621304

Inventors:

David Fleming - El Cajon CA

International Classification:

E02D 2732
E02D 3500

US Classification:

405258

Abstract:

A ground surface contour modifying apparatus and method which includes a plurality of independent, selectively actuable hydraulic elements positioned below the surface of a defined area of ground. Selective actuation of the hydraulic elements enables modification of the contours of the overlying ground surface.

US Patent:

20200204052, Jun 25, 2020

Filed:

Mar 3, 2020

Appl. No.:

16/808088

Inventors:

- Chatsworth CA, US
Siavash Sadeghi - Northridge CA, US
David James Fleming - Cardiff CA, US
Michael Bruce Moir - Newbury CA, US

Assignee:

RESMED MOTOR TECHNOLOGIES INC. - Chatsworth CA

International Classification:

H02K 19/10
A61M 16/16
A61M 16/08
A61M 16/06
A61M 16/00
H02P 25/098
A61M 16/10
H02K 11/22
H02K 5/04
H02K 3/28
H02K 1/24

Abstract:

A stator assembly has coils in a distributed winding configuration. A poly-phase switched reluctance motor assembly may include a stator assembly with multiple coils in a distributed winding configuration. The stator assembly may have a central bore into which a rotor assembly having multiple poles is received and configured to rotate. A method of controlling a switched reluctance motor may include at least three phases wherein during each conduction period a first phase is energized with negative direction current, a second phase is energized with positive current and there is at least one non-energized phase. During each commutation period either the first phase or second phase switches off to a non-energized state and one of the non-energized phases switches on to an energized state with the same direction current as the first or second phase that was switched off. The switched reluctance motor may include a distributed winding configuration.

US Patent:

20200195109, Jun 18, 2020

Filed:

Feb 19, 2020

Appl. No.:

16/795085

Inventors:

- Chatsworth CA, US
Siavash Sadeghi - Northridge CA, US
David James Fleming - Cardiff CA, US
Michael Bruce Moir - Newbury Park CA, US

Assignee:

RESMED MOTOR TECHNOLOGIES INC. - Chatsworth CA

International Classification:

H02K 19/10
H02K 1/24
H02K 3/28
H02K 5/04
H02K 11/22
A61M 16/10
H02P 25/098
A61M 16/00
A61M 16/06
A61M 16/08
A61M 16/16

Abstract:

A stator assembly has coils in a distributed winding configuration. A poly-phase switched reluctance motor assembly may include a stator assembly with multiple coils in a distributed winding configuration. The stator assembly may have a central bore into which a rotor assembly having multiple poles is received and configured to rotate. A method of controlling a switched reluctance motor may include at least three phases wherein during each conduction period a first phase is energized with negative direction current, a second phase is energized with positive current and there is at least one non-energized phase. During each commutation period either the first phase or second phase switches off to a non-energized state and one of the non-energized phases switches on to an energized state with the same direction current as the first or second phase that was switched off. The switched reluctance motor may include a distributed winding configuration.

US Patent:

20160336841, Nov 17, 2016

Filed:

Jan 16, 2015

Appl. No.:

15/110780

Inventors:

- Chatsworth CA, US
Siavash Sadeghi - Northridge CA, US
David James Fleming - Cardiff CA, US
Michael Bruce Moir - Newbury Park CA, US

Assignee:

ResMed Motor Technologies Inc. - Chatsworth CA

International Classification:

H02K 19/10
H02K 1/24
H02K 3/28
H02K 5/04
A61M 16/06
A61M 16/10
A61M 16/16
A61M 16/00
A61M 16/08
H02P 25/098
H02K 11/22

Abstract:

A stator assembly has coils in a distributed winding configuration. A poly-phase switched reluctance motor assembly may include a stator assembly with multiple coils in a distributed winding configuration. The stator assembly may have a central bore into which a rotor assembly having multiple poles is received and configured to rotate. A method of controlling a switched reluctance motor may include at least three phases wherein during each conduction period a first phase is energized with negative direction current, a second phase is energized with positive current and there is at least one non-energized phase. During each commutation period either the first phase or second phase switches off to a non-energized state and one of the non-energized phases switches on to an energized state with the same direction current as the first or second phase that was switched off. The switched reluctance motor may include a distributed winding configuration.