Patents by Inventor George A. Dickinson

George A. Dickinson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20180097418
    Abstract: A coil for an electrical machine having a stator with salient poles is disclosed. The coil has first and second coil sides joined by a respective coil end at each end to define a space for accepting a salient pole. Each coil side has an inner side facing the space and an opposed outer side. The coil comprises a plurality of turns of a conductor arranged in layers of turns with a first layer disposed on the inner side of the first coil side and outer side of the second coil side and a second layer disposed on the inner side of the second coil side and outer side of the first coil side. Arrangement of layers of turns of the conductor provides a thermal conduction path for the conductor with reduced thermal impedance, which facilitates transfer of heat into the stator from portions of the conductor oriented away from the stator surface.
    Type: Application
    Filed: September 28, 2017
    Publication date: April 5, 2018
    Inventor: Phillip George Dickinson
  • Publication number: 20160276888
    Abstract: A coil for an electrical machine is wound from a foil conductor. The foil is initially wound on a former with the thickness of the foil extending away from the former. The coil is subsequently transferred to a bending tool and the sides of the coil are manipulated so as to turn the coil sides through approximately 90 degrees. After assembly to the stator of the electrical machine, the coil exhibits excellent heat transfer for the losses in the coil, enabling cool running of the winding or increased rating for the machine.
    Type: Application
    Filed: March 2, 2016
    Publication date: September 22, 2016
    Inventor: Phillip George Dickinson
  • Publication number: 20160226319
    Abstract: An electrical machine has a lamination core assembled with an interference fit into a frame. The core has notches around the surface forming the interference fit which reduce the stress in the frame. The notches extend from the outer surface of the core towards the centre of the machine. This invention is particularly beneficial when the operating or storage temperature is reduced to a low value. The invention also applies to the fitting of a shaft into a rotor core.
    Type: Application
    Filed: January 22, 2016
    Publication date: August 4, 2016
    Inventor: Phillip George Dickinson
  • Patent number: 9246363
    Abstract: A rotating electrical machine has a rotor composed of laminations having salient poles. The poles have one or more holes which are positioned so as to reduce the peak stress experienced by the laminations when the rotor is rotating. The holes are chosen according to a disclosed design procedure which gives a reduction in peak stress for a given limit on the output of the machine.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: January 26, 2016
    Assignee: NIDEC SR DRIVES, LTD
    Inventors: Phillip George Dickinson, Paul Andrew Sykes, Norman Neilson Fulton, Thilak Raj Durairaj
  • Publication number: 20150035390
    Abstract: A rotating electrical machine has a rotor composed of laminations which are mounted on a shaft in an embodiment. The portion of the laminations adjacent the shaft has one or more slots, so designed as to increase the contact force between the lamination and the shaft as the speed of the rotor rises. This allows the laminations to be assembled to the shaft with a smaller interference fit yet retain a contact force at high speeds. The laminations may be assembled to the shaft with a suitable adhesive.
    Type: Application
    Filed: August 4, 2014
    Publication date: February 5, 2015
    Inventors: Steven Paul Randall, Phillip George Dickinson
  • Patent number: 8169109
    Abstract: A switched reluctance machine has an array of poles attached to a stationary holding member to form a stator. The stator has no back-iron. The machine has two arrays of rotor poles, positioned on either side of the stator poles, and circumferentially aligned with each other. When a pair of rotor poles is aligned with a stator pole, a small airgap is formed at each end of the stator pole, across which flux can be driven to produce torque in a rotary arrangement or force in a linear arrangement. When the poles are in the unaligned position, the phase inductance is very low.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: May 1, 2012
    Assignee: Nidec SR Drives Ltd.
    Inventors: Paul Andrew Sykes, Phillip George Dickinson
  • Publication number: 20110285242
    Abstract: A rotating electrical machine has a rotor composed of laminations having salient poles. The poles have one or more holes which are positioned so as to reduce the peak stress experienced by the lamination when the rotor is rotating. The holes are chosen according to a disclosed design procedure which gives a reduction in peak stress for a given limit on the output of the machine.
    Type: Application
    Filed: May 11, 2011
    Publication date: November 24, 2011
    Applicant: NIDEC SR DRIVES LTD.
    Inventors: Phillip George Dickinson, Paul Andrew Sykes, Norman Neilson Fulton, Thilak Raj Durairaj
  • Patent number: 7884508
    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.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: February 8, 2011
    Assignee: Höganäs AB
    Inventors: Alan Jack, Lars-Olov Pennander, Philip George Dickinson
  • Publication number: 20100231062
    Abstract: A switched reluctance machine has an array of poles attached to a stationary holding member to form a stator. The stator has no back-iron. The machine has two arrays of rotor poles, positioned on either side of the stator poles, and circumferentially aligned with each other. When a pair of rotor poles is aligned with a stator pole, a small airgap is formed at each end of the stator pole, across which flux can be driven to produce torque in a rotary arrangement or force in a linear arrangement. When the poles are in the unaligned position, the phase inductance is very low.
    Type: Application
    Filed: March 11, 2010
    Publication date: September 16, 2010
    Applicant: Switched Reluctance Drives Limited
    Inventors: Paul Andrew Sykes, Phillip George Dickinson
  • Patent number: 7560845
    Abstract: A rotor for a switched reluctance machine has its main magnetic circuit provided by two mouldings of soft magnetic composite. The mouldings are substantially identical and fit together to form a magnetic circuit which, by virtue of its design, has a very low inductance in the unaligned position. The portions of the magnetic circuit lie beyond the active length of the rotor poles and the flux path is described in three dimensions.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: July 14, 2009
    Assignee: Switched Reluctance Drives Limited
    Inventors: Phillip George Dickinson, Norman Neilson Fulton
  • Publication number: 20080211324
    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.
    Type: Application
    Filed: May 12, 2008
    Publication date: September 4, 2008
    Applicant: HOGANAS AB
    Inventors: Alan Jack, Lars-Olov Pennander, Philip George Dickinson
  • Patent number: 7378763
    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.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: May 27, 2008
    Assignee: Höganäs AB
    Inventors: Alan Jack, Lars-Olov Pennander, Philip George Dickinson
  • Patent number: 7227291
    Abstract: A stator (50) for an electrical machine. A core of the stator (50) is made up of a series of connected segments (42), that are rotatable relative to one another during an assembly operation. Each segment (42) includes a radially outermost base portion (44) from which a respective integral pole piece (46) projects substantially inwardly to a pole piece tip. The tip includes a surface (49) that is arcuate and concentric with an axis of rotation of the machine. Each pole piece (46) projects in a non-radial direction and such that a semi-closed slot (48) arranged to locate part of a least one coil (30) therein is provided between each pair of juxtaposed pole pieces (46). A coil (30) is fittable to a respective one of the pole pieces (46) during the assembly operation without deformation of the pole piece (46).
    Type: Grant
    Filed: June 6, 2001
    Date of Patent: June 5, 2007
    Assignee: Cummins Generator Technologies Limited
    Inventors: Alan Galloway Jack, Phillip George Dickinson, Barrie Charles Mecrow
  • Patent number: 7064469
    Abstract: An essentially ring shaped core back for an electrical machine comprising a plurality of stacked, ring shaped sheets of soft magnetic material, a barrier of electrical resistance arranged between two adjacent sheets of soft magnetic material for reducing effects of eddy currents. At least each sheet of soft magnetic material in a subset of said plurality of stacked, ring shaped sheets of soft magnetic material includes a plurality of circumferentially arranged tooth openings that are extending axially through each sheet in said subset of said plurality of stacked, ring shaped sheets of soft magnetic material, additionally, each sheet of said subset of said plurality of stacked, ring shaped sheets of soft magnetic material includes a first inner closing portion and a second inner closing portion that are arranged between each tooth opening and an inner perimeter of said ring shaped sheet of soft magnetic material.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: June 20, 2006
    Assignee: Höganäs AB
    Inventors: Alan Jack, Barry Mecrow, Philip George Dickinson, Mats Persson, Chris Manning
  • Publication number: 20040263003
    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.
    Type: Application
    Filed: March 5, 2004
    Publication date: December 30, 2004
    Applicant: Hoganas AB
    Inventors: Alan Jack, Lars-Olov Pennander, Philip George Dickinson
  • Publication number: 20040212267
    Abstract: An essentially ring shaped core back for an electrical machine comprising a plurality of stacked, ring shaped sheets of soft magnetic material, a barrier of electrical resistance arranged between two adjacent sheets of soft magnetic material for reducing effects of eddy currents. At least each sheet of soft magnetic material in a subset of said plurality of stacked, ring shaped sheets of soft magnetic material includes a plurality of circumferentially arranged tooth openings that are extending axially through each sheet in said subset of said plurality of stacked, ring shaped sheets of soft magnetic material, additionally, each sheet of said subset of said plurality of stacked, ring shaped sheets of soft magnetic material includes a first inner closing portion and a second inner closing portion that are arranged between each tooth opening and an inner perimeter of said ring shaped sheet of soft magnetic material.
    Type: Application
    Filed: April 14, 2004
    Publication date: October 28, 2004
    Applicant: Hoganas AB
    Inventors: Alan Jack, Barrie Mecrow, Phillip George Dickinson, Mats Persson, Chris Manning
  • Publication number: 20040074079
    Abstract: (57) A stator (50) for an electrical machine. A core of the stator (50) is made up of a series of connected segments (42), that are rotatable relative to one another during an assembly operation. Each segment (42) includes a radially outermost base portion (44) from which a respective integral pole piece (46) projects substantially inwardly to a pole piece tip. The tip includes a surface (49) that is arcuate and concentric with an axis of rotation of the machine. Each pole piece (46) projects in a non-radial direction and such that a semi-closed slot (48) arranged to locate part of a least one coil (30) therein is provided between each pair of juxtaposed pole pieces (46). A coil (30) is fittable to a respective one of the pole pieces (46) during the assembly operation without deformation of the pole piece (46).
    Type: Application
    Filed: December 4, 2003
    Publication date: April 22, 2004
    Inventors: Alan Galloway Jack, Phillip George Dickinson, Barrie Charles Mecrow
  • Patent number: 6472792
    Abstract: A stator core for an electrical machine includes an annular yoke and a plurality of teeth spaced circumferentially on the annular yoke and extending radially therefrom, the spaces between the teeth defining circumferentially spaced winding slots. The teeth are formed as separate components from a soft magnetic powder material. Each tooth has non-decreasing cross-sectional dimensions in a direction towards a distal tip along a length of the tooth corresponding to a winding slot, and has the same or smaller cross-sectional dimensions along a proximal end of the tooth. Thereby, the tooth may be assembled with a core-back section of the annular yoke and is able to receive a coil before the assembling with the yoke.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: October 29, 2002
    Assignee: Höganäs AB
    Inventors: Alan G. Jack, Barrie Mecrow, John Terence Evans, James Stonehouse Burdess, John Neville Fawcett, Dawn Stephenson, Phillip George Dickinson
  • Patent number: 6016355
    Abstract: An apparatus for detecting topographic variations on an object such as a finger includes an array of sensing elements disposed on a substrate which each have a parasitic capacitance. An insulating receiving surface is disposed over the array of sensing elements and is adapted to receive the object such that a sensing element and a portion of the object located thereabove creates a measurable change in capacitance with respect to the parasitic capacitance. An electronic circuit is coupled to the array of sensing elements for measuring the measurable change in capacitance.
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: January 18, 2000
    Assignee: Veridicom, Inc.
    Inventors: Alexander George Dickinson, Ross McPherson, Sunetra Mendis, Paul C. Ross, John A. Tyson
  • Patent number: 6014124
    Abstract: A passive liquid crystal display is enhanced by selectively applying low frequency signals to the columns of electrodes on the substrates sandwiching a liquid crystal, selectively applying high frequency signals to the rows of the electrodes so the first and second signals activate the liquid crystal at selected ones of said rows and columns, and passive storing the energy in capacitances exhibited by said rows at the high frequency with an inductor. The low frequency is below the crossover frequency of the liquid crystal, and the high frequency above the crossover frequency.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: January 11, 2000
    Assignee: Lucent Technologies Inc.
    Inventors: Alexander George Dickinson, Gregory Peter Kochanski, Apollo Wong