Patents by Inventor Phillip George Dickinson
Phillip George 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).
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Publication number: 20180097418Abstract: 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: ApplicationFiled: September 28, 2017Publication date: April 5, 2018Inventor: Phillip George Dickinson
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Publication number: 20160276888Abstract: 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: ApplicationFiled: March 2, 2016Publication date: September 22, 2016Inventor: Phillip George Dickinson
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Publication number: 20160226319Abstract: 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: ApplicationFiled: January 22, 2016Publication date: August 4, 2016Inventor: Phillip George Dickinson
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Patent number: 9246363Abstract: 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: GrantFiled: May 11, 2011Date of Patent: January 26, 2016Assignee: NIDEC SR DRIVES, LTDInventors: Phillip George Dickinson, Paul Andrew Sykes, Norman Neilson Fulton, Thilak Raj Durairaj
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Publication number: 20150035390Abstract: 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: ApplicationFiled: August 4, 2014Publication date: February 5, 2015Inventors: Steven Paul Randall, Phillip George Dickinson
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Patent number: 8169109Abstract: 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: GrantFiled: March 11, 2010Date of Patent: May 1, 2012Assignee: Nidec SR Drives Ltd.Inventors: Paul Andrew Sykes, Phillip George Dickinson
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Publication number: 20110285242Abstract: 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: ApplicationFiled: May 11, 2011Publication date: November 24, 2011Applicant: NIDEC SR DRIVES LTD.Inventors: Phillip George Dickinson, Paul Andrew Sykes, Norman Neilson Fulton, Thilak Raj Durairaj
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Publication number: 20100231062Abstract: 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: ApplicationFiled: March 11, 2010Publication date: September 16, 2010Applicant: Switched Reluctance Drives LimitedInventors: Paul Andrew Sykes, Phillip George Dickinson
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Patent number: 7560845Abstract: 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: GrantFiled: September 19, 2006Date of Patent: July 14, 2009Assignee: Switched Reluctance Drives LimitedInventors: Phillip George Dickinson, Norman Neilson Fulton
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Patent number: 7227291Abstract: 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: GrantFiled: June 6, 2001Date of Patent: June 5, 2007Assignee: Cummins Generator Technologies LimitedInventors: Alan Galloway Jack, Phillip George Dickinson, Barrie Charles Mecrow
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Publication number: 20040212267Abstract: 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: ApplicationFiled: April 14, 2004Publication date: October 28, 2004Applicant: Hoganas ABInventors: Alan Jack, Barrie Mecrow, Phillip George Dickinson, Mats Persson, Chris Manning
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Publication number: 20040074079Abstract: (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: ApplicationFiled: December 4, 2003Publication date: April 22, 2004Inventors: Alan Galloway Jack, Phillip George Dickinson, Barrie Charles Mecrow
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Patent number: 6472792Abstract: 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: GrantFiled: March 5, 2001Date of Patent: October 29, 2002Assignee: Höganäs ABInventors: Alan G. Jack, Barrie Mecrow, John Terence Evans, James Stonehouse Burdess, John Neville Fawcett, Dawn Stephenson, Phillip George Dickinson