发明名称 |
Electric current sensing device of the magnetic field compensationtype |
摘要 |
A magnetic circuit is coupled with a primary conductor in which flows the current to be sensed. The magnetic circuit has an air gap with a magnetic field detector and is coupled with a measuring coil producing a magnetic flux for compensation the flux generated by the primary current. The necessary current in the measuring coil to achieve such flux compensation is a measure for the primary current. A yoke part of high magnetic permeability is arranged in the vicinity of the air gap inside the measuring coil so as to form a magnetic shunt between the two magnetic circuit portions forming the air gap.
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申请公布号 |
US4939448(A) |
申请公布日期 |
1990.07.03 |
申请号 |
US19880260727 |
申请日期 |
1988.10.14 |
申请人 |
LIAISONS ELECTRONIQUES-MECANIQUES LEM SA |
发明人 |
GUDEL, CLAUDE |
分类号 |
G01R19/00;G01R15/20 |
主分类号 |
G01R19/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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