Philip G Hollingsworth

US Patent:

6603224, Aug 5, 2003

Filed:

Dec 8, 1999

Appl. No.:

09/457617

Inventors:

Philip Hollingsworth - La Jolla CA
James Carl Ellard - San Diego CA
Paul M. Lindberg - San Diego CA
Duncan Rea Williams - Lake Forest CA

Assignee:

California Linear Devices, Inc. - Carlsbad CA

International Classification:

H02K 4100

US Classification:

310 12

Abstract:

A stator assembly for a linear motor includes a plurality of interleaved modular pieces. Prewound coils and spacer pieces are alternately provided along the length of the stator. The spacer pieces have a generally trapezoidal cross section, complementary to a trapezoidal cross section of the prewound coils. Rims may be provided at an inner region of the spacer pieces. At the outer edge of the spacer pieces is provided a wall which mates with the identical wall on an adjacent spacer piece. The spacer piece may have radial slots cut entirely and/or partially through the piece in order to reduce the current and eddy currents induced when the prewound coils are energized.

US Patent:

7417343, Aug 26, 2008

Filed:

Jan 25, 2002

Appl. No.:

10/500259

Inventors:

Paul M Lindberg - San Diego CA, US
Philip G. Hollingsworth - La Jolla CA, US
James Carl Ellard - San Diego CA, US
Leonard N. Wedman - Santa Barbara CA, US

Assignee:

California Linear Devices, Inc. - Carlsbad CA

International Classification:

H02K 7/08

US Classification:

310 90, 310 12

Abstract:

Magnetic motor component sleeves () for motor components with the sleeves () having various helpful magnetic characteristics, such as high magnetic permeability; magnetic saturation; residual (or remanent) magnetization; anisotropic magnetic properties. Method for making a magnetic linear motor shaft (), including thermal treatment to temporarily change the dimensions of various shaft components to allow tight assembly.

US Patent:

7805270, Sep 28, 2010

Filed:

Feb 5, 2007

Appl. No.:

11/702783

Inventors:

Paul M. Lindberg - San Diego CA, US
Gary Schultze - Carlsbad CA, US
Philip Hollingsworth - La Jolla CA, US

Assignee:

Moog Inc. - East Aurora NY

International Classification:

H02P 5/00

US Classification:

702 94, 702 57, 702 73, 702 85, 702104, 702106, 702150, 702151, 318127, 318128, 318490, 318560, 318652

Abstract:

An apparatus and method for identifying the position of a magnetic shaft are provided. N field sensors are adjacently positioned at fixed locations relative to the shaft's periodic field, corresponding to 180/N relative phase shifts. A table provides N>2 predetermined signal models and a pre-identified position associated with each. An interpolator compares a representation of the N measured sensor signals to at least two predetermined models to generate a correction signal that provides another pre-identified position. The correction signal depends on N sensors for every position of the shaft. The correction signal is used to incrementally choose said another pre-identified position from the table as an approximate position of the shaft in an iterative process to find the minimum correction signal and identify the position.

US Patent:

7865324, Jan 4, 2011

Filed:

Jan 7, 2010

Appl. No.:

12/655773

Inventors:

Paul M. Lindberg - San Diego CA, US
Gary Schultze - Carlsbad CA, US
Philip Hollingsworth - La Jolla CA, US

Assignee:

Moog Inc. - East Aurora NY

International Classification:

H02P 5/00

US Classification:

702 94, 702 67, 702 73, 702 85, 702104, 702106, 702150, 702151, 318127, 318128, 318490, 318560, 318652

Abstract:

An apparatus and method for identifying the position of a magnetic shaft are provided. N field sensors are adjacently positioned at fixed locations relative to the shaft's periodic field, corresponding to 180/N relative phase shifts. A table provides N>2 predetermined signal models and a pre-identified position associated with each. An interpolator compares a representation of the N measured sensor signals to at least two predetermined models to generate a correction signal that provides another pre-identified position. The correction signal depends on N sensors for every position of the shaft. The correction signal is used to incrementally choose said another pre-identified position from the table as an approximate position of the shaft in an iterative process to find the minimum correction signal and identify the position.

US Patent:

7946025, May 24, 2011

Filed:

Mar 31, 2010

Appl. No.:

12/798180

Inventors:

Paul M. Lindberg - San Diego CA, US
Philip G. Hollingsworth - La Jolla CA, US
James Carl Ellard - San Diego CA, US
Leonard N. Wedman - Santa Barbara CA, US

Assignee:

Moog Inc. - East Aurora NY

International Classification:

H02K 15/00

US Classification:

29596, 295921, 310 14

Abstract:

A method for making a magnetic linear motor shaft including thermal treatment to temporarily change the dimensions of various shaft components to allow tight interference fit assembly. The magnetic motor includes a core piece, annular magnets and pole pieces.

US Patent:

20060108878, May 25, 2006

Filed:

Nov 22, 2004

Appl. No.:

10/994968

Inventors:

Paul Lindberg - La Jolla CA, US
Gary Schultze - Carlsbad CA, US
Philip Hollingsworth - La Jolla CA, US
James Ellard - San Diego CA, US

International Classification:

H02K 41/00
H02K 1/00

US Classification:

310012000, 310216000

Abstract:

A linear motor comprising a stator core and/or a mover. The stator core of said linear motor comprising an inner perimeter, an outer perimeter essentially encircling the inner perimeter, a first and a second tooth being arranged along one of the inner perimeter or the outer perimeter, a slot for receiving a stator coil, said slot being a cavity arranged within the stator core, wherein said stator core is divided into a first stator part and a second stator part, said first stator part including the first tooth, being arranged to partially define the slot, and being made of soft magnetic powder, and said second stator part including the second tooth, being arranged to partially define the slot, and being made of soft magnetic powder.

US Patent:

20080309187, Dec 18, 2008

Filed:

Aug 15, 2008

Appl. No.:

12/228695

Inventors:

Paul M. Lindberg - San Diego CA, US
Philip G. Hollingsworth - La Jolla CA, US

International Classification:

H02K 15/03

US Classification:

310152, 29596, 310 12, 310 90

Abstract:

A method for making a magnetic linear motor shaft including thermal treatment to temporarily change the dimensions of various shaft components to allow tight interference fit assembly. The magnetic motor includes a core piece, annular magnets and pole pieces.

US Patent:

62895753, Sep 18, 2001

Filed:

Dec 8, 1999

Appl. No.:

9/457611

Inventors:

Philip Hollingsworth - La Jolla CA
James Carl Ellard - San Diego CA
Paul M. Lindberg - San Diego CA

Assignee:

California Linear Devices, Inc. - Carlsbad CA

International Classification:

H02K 1500
H02K 1514
H02K 1516

US Classification:

29596

Abstract:

A stator assembly has a pair of end holes leading to a hollow region which has a larger diameter than the end holes. The assembly is manufactured around an elongated pole having a diameter equal to the end holes, which is surrounded by a temporary sleeve whose thickness fills the gap between the pole and the inner wall of the hollow region. The pieces of the assembly are placed onto the pole such that the sleeve lies within the hollow region, to thereby align them correctly with one another. After the pieces are secured to each other, the pole is removed, leaving the sleeve within the hollow region, and then the sleeve is removed. The sleeve may be flexible in order to expedite its removal from the hollow, and also may be of a magnetic material that is kept in place by magnetic forces generated by the stator assembly or by the pole.