Patents by Inventor Paul Andrew Sykes

Paul Andrew Sykes 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).

  • Patent number: 9887657
    Abstract: A controller for a switched reluctance machine is operated to close a switch which would otherwise be open so as to connect a phase winding to the DC link to which the winding is connected during other parts of the electrical cycle. This produces a condition which allows the insulation of the system to be monitored by applying a voltage between the DC link and ground.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: February 6, 2018
    Assignee: NIDEC SR DRIVES, LTD
    Inventors: Michael Paul Tankard, Paul Andrew Sykes, Ian Jordison
  • Publication number: 20170117839
    Abstract: A controller for a switched reluctance machine is operated to close a switch which would otherwise be open so as to connect a phase winding to the DC link to which the winding is connected during other parts of the electrical cycle. This produces a condition which allows the insulation of the system to be monitored by applying a voltage between the DC link and ground.
    Type: Application
    Filed: October 12, 2016
    Publication date: April 27, 2017
    Inventors: Michael Paul Tankard, Paul Andrew Sykes, Ian Jordison
  • 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
  • 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
  • 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: 7208906
    Abstract: A switched reluctance drive is supplied from a power source. The phases of the machine are controlled by a current controller which uses an excitation strategy to minimize the supply current drawn for a particular output. The strategy alternates the excitation between two phases for a given time until the rotor moves to a desired position. A method of starting a switched reluctance motor having a stator with at least two phases, a moveable part, and a position transducer includes determining from transducer output a plurality of phases that are available to produce force in a desired direction, energizing a first phase of the available phases for a predetermined time period that is independent of the transducer output, and energizing a second phase of the available phases after energization of the first phase is initiated.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: April 24, 2007
    Assignee: Switched Reluctance Drives Limited
    Inventors: Michael James Turner, Paul Andrew Sykes
  • Patent number: 7091627
    Abstract: A power train controller can operate in either motoring or braking modes. Its prime mover accepts a limited proportion of braking power and the remainder of the braking power is dissipated in an energy dump. A control system is arranged to maintain the voltage bus of the power train at a constant value throughout both modes.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: August 15, 2006
    Assignee: Switched Relunctance Drives, Limited
    Inventors: Michael James Turner, Paul Andrew Sykes
  • Publication number: 20040222639
    Abstract: A power train controller can operate in either motoring or braking modes. Its prime mover accepts a limited proportion of braking power and the remainder of the braking power is dissipated in an energy dump. A control system is arranged to maintain the voltage bus of the power train at a constant value throughout both modes.
    Type: Application
    Filed: April 30, 2004
    Publication date: November 11, 2004
    Applicant: SWITCHED RELUCTANCE DRIVES LIMITED
    Inventors: Michael James Turner, Paul Andrew Sykes
  • Publication number: 20040222765
    Abstract: A switched reluctance drive is supplied from a power source. The phases of the machine are controlled by a current controller which uses an excitation strategy to minimize the supply current drawn for a particular output. The strategy alternates the excitation between two phases for a given time until the rotor moves to a desired position.
    Type: Application
    Filed: April 30, 2004
    Publication date: November 11, 2004
    Applicant: SWITCHED RELUCTANCE DRIVES LIMITED
    Inventors: Michael James Turner, Paul Andrew Sykes