Invention Grant
- Patent Title: Device and method for measuring electrical current in an electrical conductor
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Application No.: US16326240Application Date: 2016-10-21
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Publication No.: US10782324B2Publication Date: 2020-09-22
- Inventor: Gunnar Klinghult , Björn Rosqvist , Kåre Agardh
- Applicant: Qoitech AB
- Applicant Address: SE Lund
- Assignee: QOITECH AB
- Current Assignee: QOITECH AB
- Current Assignee Address: SE Lund
- Agency: Tucker Ellis LLP
- International Application: PCT/IB2016/056323 WO 20161021
- International Announcement: WO2018/073627 WO 20180426
- Main IPC: G01R19/25
- IPC: G01R19/25 ; G01R1/20 ; G01R15/18 ; G01R19/00 ; G01R15/14

Abstract:
The disclosure relates to a device for measuring electrical current in an electrical conductor (2), the device comprising: a measuring circuit configured to be connected to the electrical conductor, the measuring circuit comprising: a resistor based measuring circuit comprising a resistor (10), a transformer based measuring circuit comprising a current transformer (20) comprising a primary coil (20a), connected in series with the resistor (10) of the resistor based measuring circuit, a first inverter (12) configured to transform a first digital signal using a transfer function being an inverse of a transfer function representing the resistor based measuring circuit; a second inverter (22) configured to transform a second digital signal using a transfer function being an inverse of a transfer function representing the transformer based measuring circuits; and a signal combiner (5) configured to combine the transformed first and second digital signals, thereby providing a digital signal representing the electrical current in the electrical conductor. The disclosure also relates to a method for measuring electrical current in an electrical conductor.
Public/Granted literature
- US20190212373A1 DEVICE AND METHOD FOR MEASURING ELECTRICAL CURRENT IN AN ELECTRICAL CONDUCTOR Public/Granted day:2019-07-11
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