Title of Invention | MEASURING TRANSDUCER |
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Abstract | ABSTRACT 537/CHENP/2004 MEASURING TRANSDUCER The present invention relates to a measuring transducer for comparing a current flowing through a conductor to a reference current comprising a magnetic circuit formed by a troidal core, a conductor through which the current flows and which is enclosed by the toroidal core, a secondary winding arranged on the toroidal core, and a magnetic flux measuring element which is arranged in a gap of the toroidal core and which is sensitive to the magnetic field in the gap, wherein there is provided a reference setting unit for acting on the secondary winding with a predefined reference current which sets the current which is to flow in the conductor through which current flows, and wherein the magnetic flux measuring element is adapted to deliver a difference signal representative of the difference between the reference current and the current flowing through the conductor. |
Full Text | ABSTRACT 537/CHENP/2004 MEASURING TRANSDUCER The present invention relates to a measuring transducer for comparing a current flowing through a conductor to a reference current comprising a magnetic circuit formed by a troidal core, a conductor through which the current flows and which is enclosed by the toroidal core, a secondary winding arranged on the toroidal core, and a magnetic flux measuring element which is arranged in a gap of the toroidal core and which is sensitive to the magnetic field in the gap, wherein there is provided a reference setting unit for acting on the secondary winding with a predefined reference current which sets the current which is to flow in the conductor through which current flows, and wherein the magnetic flux measuring element is adapted to deliver a difference signal representative of the difference between the reference current and the current flowing through the conductor. I CLAIM: 1. A measuring transducer for comparing a current flowing through a conductor (16) to a reference current comprising a magnetic circuit formed by a troidal core (10), a conductor (16) through which the current flows and which is enclosed by the toroidal core (10), a secondary winding (18) arranged on the toroidal core (10), and a magnetic flux measuring element (12) which is arranged in a gap of the toroidal core (10) and which is sensitive to the magnetic field in the gap, wherein there is provided a reference setting unit (26) for acting on the secondary winding (18) with a predefined reference current which sets the current which is to flow in the conductor (16) through which current flows, and wherein the magnetic flux measuring element (12) is adapted to deliver a difference signal representative of the difference between the reference current and the current flowing through the conductor (16). 2. The measuring transducer as claimed in claim 1, wherein the magnetic flux measuring element (12) is a Hall element. 3. The measuring transducer as claimed in any one of the preceding claims, wherein the connected downstream of the output of the magnetic flux measuring element (12) is an amplifier (14) for amplifying the electrical output signal of the magnetic flux measuring element (12). 4. The measuring transducer as claimed in any one of the preceding claims, wherein a regulating unit (28) is provided for controlling the current flowing through the conductor (16) so that the current flowing through the conductor (16) approximates to the reference current. 5. The measuring transducer as claimed in any one of the preceding claims, wherein measuring means are connected downstream of the magnetic flux measuring element (12) for superimposition of the reference current with the output signal of the magnetic flux measuring element (12) to form the absolute value. 6. A control unit for controlling or regulating a current flowing through a conductor (16) with a measuring transducer according to any one of the preceding claims for measuring the current flowing through the conductor (16). 7. An inverter, in particular for a wind power installation, having a control unit according to claim 6, for controlling the output current of the inverter. 8. The inverter as claimed in claim 7, wherein the reference setting unit (26) is part of the inverter. 9. A wind power installation having an inverter as claimed in claim 7 or 8. 10. A measuring transducer substantially as herein described with reference to figure 2 of the accompanying drawings. |
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537-chenp-2004-correspondnece-others.pdf
537-chenp-2004-correspondnece-po.pdf
537-chenp-2004-description(complete).pdf
Patent Number | 201342 | ||||||||
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Indian Patent Application Number | 537/CHENP/2004 | ||||||||
PG Journal Number | 01/2009 | ||||||||
Publication Date | 02-Jan-2009 | ||||||||
Grant Date | 07-Jul-2006 | ||||||||
Date of Filing | 12-Mar-2004 | ||||||||
Name of Patentee | SHRI. WOBBEN, Aloys | ||||||||
Applicant Address | Argestrasse 19, 26607 Aurich | ||||||||
Inventors:
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PCT International Classification Number | G01R 15/20 | ||||||||
PCT International Application Number | PCT/EP2002/09748 | ||||||||
PCT International Filing date | 2002-08-31 | ||||||||
PCT Conventions:
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