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Karron Law Phones & Addresses

  • Cheney, WA
  • San Carlos, CA
  • Rathdrum, ID
  • 4135 Murdock Ave, Sarasota, FL 34231 (941) 923-8111
  • Spokane, WA
  • Ocean Park, WA
  • Stanwood, WA
  • Mill Creek, WA
  • Ridgefield, WA

Publications

Us Patents

Magnetic Transducer And Current Transducer For Measuring An Electrical Current

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US Patent:
20140009143, Jan 9, 2014
Filed:
Jun 18, 2013
Appl. No.:
13/920823
Inventors:
- Zug, CH
Sasa Dimitrijevic - Nis, RS
Karron Louis Law - Cheney WA, US
Radivoje Popovic - Zug, CH
Ian James Walker - Woodside CA, US
International Classification:
G01R 33/04
G01R 33/09
G01R 33/07
US Classification:
324244
Abstract:
The invention concerns a magnetic transducer comprising a magnetic field sensor and an electronic circuit. The electronic circuit comprises at least one current source, a transformer, a fully differential preamplifier coupled to the transformer, a phase sensitive detector coupled to the preamplifier and a logic block configured to operate the magnetic field sensor(s) to provide an AC output voltage. The magnetic field sensor(s) is preferably either a Hall element or an AMR sensor or a fluxgate sensor. The invention further concerns a current transducer for measuring a current flowing through a cable, comprising at least one such magnetic transducer and a head with one or more ferromagnetic cores optimized to reduce the effects of external magnetic fields.

Current Transducer For Measuring An Electrical Current

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US Patent:
20140009146, Jan 9, 2014
Filed:
Jun 18, 2013
Appl. No.:
13/920867
Inventors:
- Zug, CH
Sasa Dimitrijevic - Nis, RS
Karron Louis Law - Cheney WA, US
Radivoje Popovic - Zug, CH
Ian James Walker - Woodside CA, US
International Classification:
G01R 31/02
US Classification:
324252, 324244
Abstract:
The invention concerns a current transducer for measuring a current flowing through a cable, comprising at least one magnetic field sensor and an electronic circuit. The current transducer comprises a head with a ferromagnetic core optimized to reduce the effects of external magnetic fields. The invention further concerns a magnetic transducer comprising a magnetic field sensor and an electronic circuit. The electronic circuit comprises at least one current source, a transformer, a fully differential preamplifier coupled to the transformer, a phase sensitive detector coupled to the preamplifier and a logic block configured to operate the magnetic field sensor(s) to provide an AC output voltage. The magnetic field sensor(s) is preferably either a Hall element or an AMR sensor or a flux-gate sensor.

Coreless Current Probe And A Method Of Measuring Current

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US Patent:
20180231588, Aug 16, 2018
Filed:
Mar 15, 2018
Appl. No.:
15/922628
Inventors:
- San Carlos CA, US
KARRON LOUIS LAW - CHENEY WA, US
International Classification:
G01R 15/20
G01R 19/00
Abstract:
A coreless current probe has a body defining an opening. A conductor carrying a current to be measured can be accommodated in the opening. At least three coreless single point magnetic field sensors are distributed in or on the body around the opening. The sensors are arranged so that the sum of the outputs each with appropriate weighting is zero in any homogenous field and with no enclosed current. The sensors outputs have differing weightings so as to maximize rejection by the probe of external magnetic fields.

A Coreless Current Probe And A Method Of Measuring Current

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US Patent:
20160033554, Feb 4, 2016
Filed:
Mar 10, 2014
Appl. No.:
14/775553
Inventors:
- San Carlos CA, US
KARRON LOUIS LAW - CHENEY WA, US
International Classification:
G01R 15/20
G01R 19/00
Abstract:
A coreless current probe has a body defining an opening in a plane and a central line through the opening which is normal to the plane. A conductor carrying a current to be measured can be accommodated in the opening. At least three coreless single point magnetic field sensors are distributed in the body around the opening. The linear spacings between adjacent sensors around the opening are not all the same. In another embodiment, the sensors are not all located on a common cylindrical surface. One embodiment has a U-shaped body enabling engagement with a current carrying conductor. The sensors are arranged so that the sum of the outputs each with appropriate weighting is zero in any homogenous field. The sensors outputs have differing weightings so as to maximize rejection by the probe of external magnetic fields.
Karron Louis Law from Cheney, WA, age ~82 Get Report