Metering type electromagnetic current mutual inductor redidual magnetism inhibiting method |
Title： |
| Metering type electromagnetic current mutual inductor redidual magnetism inhibiting method |
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Application Number： |
200410042701 |
Application Date： |
2004/05/21 |
Announcement Date： |
2005/02/16 |
Pub. Date： |
2007/03/14 |
Publication Number： |
1581382 |
Announcement Number： |
1305085 |
Grant Date： |
2007-3-14 |
Granted Pub. Date： |
2007-3-14 |
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
H01F 38/32, G01R 15/00 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Qian Jiali, Guan Yonggang, Xu Guozheng |
Key Words： |
Metering type, electromagnetic, current mutual inductor, redidual magnetism, inhibiting method |
Abstract： |
In the method, residual magnetism restraint device is connected in parallel between secondary side of current transformer and load. Output voltage from secondary side of current transformer is restricted to preset level. Thus, magnetic flux in iron core is restricted, and is not able to be raised greatly. After current stopped, remanence in iron core is restricted, and is not able to be raised greatly, and error of the current transformer can also not be raised greatly. Features are: no complex testing and controlling circuit, simple and efficiency, high reliability, low price etc. The invention has no obvious influence on structure and operation of original current transformer. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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 Relevancy information |
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| Last Update |
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2008-4-17 |
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Selected patents owned by Tsinghua University filed in 2005 are loaded. |
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2008-3-31 |
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Selected patents owned by Tsinghua University filed in 2006 and 2007 are load. |
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