TREA

William Frederick Ray

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  • Long Eaton, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Temperature compensated current measurement
    • Patent number 9,970,963
    • Issue date May 15, 2018
    • Power Electronic Measurements Limited
    • William Frederick Ray
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Apparatus for current measurement
    • Patent number 9,606,152
    • Issue date Mar 28, 2017
    • Power Electronic Measurements Ltd.
    • Christopher R. Hewson
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    Current measuring device
    • Patent number 6,614,218
    • Issue date Sep 2, 2003
    • Power Electronic Measurements Limited
    • William Frederick Ray
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Control of switched reluctance machines
    • Patent number 5,563,488
    • Issue date Oct 8, 1996
    • Switched Reluctance Drives Limited
    • John M. Stephenson
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Control of switched reluctance machines
    • Patent number 5,545,964
    • Issue date Aug 13, 1996
    • Switched Reluctance Drives Ltd.
    • John M. Stephenson
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Control of switched reluctance machines
    • Patent number 5,469,039
    • Issue date Nov 21, 1995
    • Switched Reluctance Drives Limited
    • John M. Stephenson
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Sensorless rotor position measurement in electric machines
    • Patent number 5,467,025
    • Issue date Nov 14, 1995
    • Switched Reluctance Drives Limited
    • William F. Ray
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Power conversion circuit
    • Patent number 4,835,408
    • Issue date May 30, 1989
    • Tasc Drives Limited
    • William F. Ray
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Electric power converter circuit
    • Patent number 4,563,619
    • Issue date Jan 7, 1986
    • Chloride Group Public Limited Company
    • Rex M. Davis
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Variable reluctance motor systems
    • Patent number 4,387,326
    • Issue date Jun 7, 1983
    • Chloride Group Limited
    • William F. Ray
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Variable reluctance motor systems
    • Patent number 4,360,770
    • Issue date Nov 23, 1982
    • Chloride Group Public Limited Company
    • William F. Ray
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Variable reluctance electric motor systems
    • Patent number 4,348,619
    • Issue date Sep 7, 1982
    • Chloride Group Limited
    • William F. Ray
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Reluctance electric motor drive systems
    • Patent number 4,253,053
    • Issue date Feb 24, 1981
    • Chloride Group Limited
    • William F. Ray
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

  • Information Patent Application

    TEMPERATURE COMPENSATED CURRENT MEASUREMENT
    • Publication number 20150015244
    • Publication date Jan 15, 2015
    • POWER ELECTRONIC MEASUREMENTS LIMITED
    • William Frederick Ray
    • G01 - MEASURING TESTING
  • Information Patent Application

    APPARATUS FOR CURRENT MEASUREMENT
    • Publication number 20140306690
    • Publication date Oct 16, 2014
    • POWER ELECTRONIC MEASUREMENTS LTD
    • Christopher R. Hewson
    • G01 - MEASURING TESTING