CN2493938Y - Photomagnetic current mutual inductor - Google Patents
Photomagnetic current mutual inductor Download PDFInfo
- Publication number
- CN2493938Y CN2493938Y CN 01246900 CN01246900U CN2493938Y CN 2493938 Y CN2493938 Y CN 2493938Y CN 01246900 CN01246900 CN 01246900 CN 01246900 U CN01246900 U CN 01246900U CN 2493938 Y CN2493938 Y CN 2493938Y
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- cavity
- sensitive element
- concentrator
- current
- magnetism
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The utility model relates to a photomagnetic current mutual inductor, mainly comprising a magnetism concentrator, a current-carrying conductor and a sealed measurement light path which are shielded in a shield cover. Wherein the sealed measurement light path comprises a sealed cavity which arranges insulating layer on the top surface in which arrange a sensitive element, a polarizer, a polarizer analyzer which are connected by the optical fiber and connect the input and the output of the optical cable respectively, a temperature sensor is arranged below the sensitive element. The magnetism concentrator is provides with arch shape above the cavity, the opening end of the magnetism concentrator and the sensitive element are in the same horizontal plane, and the current-carrying wire is located in the magnetism concentrator and the cavity. The structural design of the utility model makes the mutual-inductor improve the accuracy of measurement greatly, makes the influence of the temperature variation be reduced to the minimum, and thoroughly eliminates the influence of temperature variation.
Description
Technical field
The utility model belongs to the optical current mutual inductor technical field, a kind of magneto-optical current transformer.
Background technology
Develop the various optical current mutual inductors that propose at present both at home and abroad, how to measure, all need adopt extraordinary magneto-optic memory technique to realize its function according to faraday magneto-optic effect.The core devices of such mutual inductor is a magneto-optic memory technique, will produce magneto-optic effect under the outside magnetic field effect, because the optical effect that takes place in the environmental impact magneto-optical current transformer is actually the comprehensive result of various physical influences, wherein the influence of temperature and electromagnetic interference (EMI) aspect is the most outstanding and obvious, and makes the development of magneto-opitcal current transducer run into unprecedented difficulty.Magneto-optical current transformer has passed through the research of two more than ten years, on principle, be mature on the whole, but aspect practical, also there are some problems, as temperature, electromagnetic interference (EMI) is the principal element that influences the magneto-optical current transformer measuring accuracy, although people have adopted several different methods, but still fundamentally do not solve the influence of temperature and electromagnetic interference (EMI) to magneto-optical current transformer.
Technology contents
The purpose of this utility model provides a kind of magneto-optical current transformer of new structure, is used to overcome deficiency of the prior art.
This purpose is achieved in that this magneto-optical current transformer mainly is placed in the radome jointly by the measurement light path of magnetic concentrator, current and sealing and constitutes.Wherein Feng Bi measurement light path has the cavity of a sealing, the end face of cavity is provided with thermofin, be provided with a sensitive element above in cavity, its end is connected with the polarizer, the other end is connected with analyzer, and the other end of the polarizer is connected on the input optical fibre, and two output terminals of analyzer are connected with extraneous optical cable by output optical fibre respectively, below sensitive element, be provided with temperature sensor, be connected on the output optical cable by optical fiber; The magnetic concentrator is arranged on the top, top of cavity, and its openend position and sensitive element position are at same surface level; Current carrying conductor places between magnetic concentrator and the cavity.Described magnetic concentrator is the arch form structure formula.
The utlity model has following advantage: it utilizes radome that the outside electromagnetic interference of non-measuring object is shielded, and to utilize the magnetic concentrator be that the electromagnetism of current is concentrated to measuring object, makes it to concentrate to pass the sensitive element of measuring in the light path; Thereby improve measuring accuracy greatly and can measure little electric current; Utilize to deaden thermosphere to measuring light path, thermal resistance is carried out in the sensitive element zone, so that temperature variation reduces to minimum to its influence; In the cavity of measuring light path and sensitive element, place optic temperature sensor simultaneously, with thorough elimination influence of temperature variation.
Description of drawings
Following accompanying drawing has provided embodiment of the present utility model.
Fig. 1 is the utility model whole interior structural representation.
Embodiment
In conjunction with the accompanying drawings one-piece construction of the present utility model is done further to describe in detail, as shown in Figure 1: this magneto-optical current transformer is by radome 1, with behind tested current carrying conductor 12, magnetic concentrator 2 and the airtight measurement light path shielding and form as one.With the external electromagnetic that intercepts non-measuring object to measuring the interference of light path.Wherein magnetic concentrator 2 is arch forms, and material is an iron oxygen iron, and the surface of radome 1 is the metal material shielding, and interior body portion adopts epoxy resin to manufacture.Current carrying conductor 12 is a copper rod.Described airtight measurement light path includes airtight cavity 13 (vacuumizing), and it is to be manufactured by heat-protecting glass.Thermofin 4 is arranged on the end face of cavity, is to form through 21 layers of plated film, makes to measure light path and be in rate of temperature change very in the circlet border.Be provided with a sensitive element 3 (being magneto-optic glass) above in cavity 13, under sensitive element, be provided with temperature sensor 8, and, being respectively arranged with the polarizer 5 (glass sheet), analyzer 11 in its both sides as far as possible near sensitive element, they all stick in the cavity 13.The two ends of sensitive element 3 are connected with the polarizer 5, analyzer 11 respectively by optical fiber, and the other end of the polarizer is connected on the input optical cable.Two outputs of analyzer 11 are connected on respectively on the output optical cable.Temperature sensor 8 is connected by optical cable draws, and temperature measurement signal is delivered to signal processing unit by optical fiber output, supplies the usefulness of temperature calibration, and then measured value is revised.All cable is drawn from the seal 14 of airtight cavity.Described magnetic concentrator 2 places the top, top of cavity 13, and its arch form port and sensitive element 3 positions are on the same surface level.Current (copper rod) 12 passes between arch form magnetic concentrator 2 and seal chamber 13.
Claims (2)
1, a kind of magneto-optical current transformer, it is characterized in that it is mainly by magnetic concentrator (2), the measurement light path of current (12) and sealing is placed in jointly in the radome (1) and constitutes, wherein Feng Bi measurement light path has the cavity (13) of a sealing, the end face of cavity is provided with thermofin (4), be provided with a sensitive element (3) above in cavity, its end is connected with the polarizer (5), the other end is connected with analyzer (11), the other end of the polarizer is connected on the input optical fibre (6), two output terminals of analyzer are respectively by output optical fibre (9,10) be connected with extraneous optical cable, be provided with temperature sensor (8) in the below of sensitive element (3), be connected on the output optical cable; Magnetic concentrator (2) is arranged on the top, top of cavity (13), and its openend position and sensitive element (3) position are at same surface level; Current carrying conductor (12) places between magnetic concentrator (2) and the cavity (13).
2, magneto-optical current transformer according to claim 1 is characterized in that described magnetic concentrator (2) is the arch form structure formula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01246900 CN2493938Y (en) | 2001-08-09 | 2001-08-09 | Photomagnetic current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01246900 CN2493938Y (en) | 2001-08-09 | 2001-08-09 | Photomagnetic current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2493938Y true CN2493938Y (en) | 2002-05-29 |
Family
ID=33657837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01246900 Expired - Fee Related CN2493938Y (en) | 2001-08-09 | 2001-08-09 | Photomagnetic current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2493938Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208270A (en) * | 2011-03-11 | 2011-10-05 | 厦门骐航实业有限公司 | Electronic current transformer with temperature measurement device |
| CN104237595A (en) * | 2014-06-26 | 2014-12-24 | 国家电网公司 | External current transformer |
| CN105899956A (en) * | 2013-10-18 | 2016-08-24 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Method for measuring a temperature |
| CN107192969A (en) * | 2016-03-15 | 2017-09-22 | 精工半导体有限公司 | Magnetic Sensor and its manufacture method |
-
2001
- 2001-08-09 CN CN 01246900 patent/CN2493938Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208270A (en) * | 2011-03-11 | 2011-10-05 | 厦门骐航实业有限公司 | Electronic current transformer with temperature measurement device |
| CN102208270B (en) * | 2011-03-11 | 2012-10-31 | 福建骐航实业有限公司 | Electronic current transformer with temperature measurement device |
| CN105899956A (en) * | 2013-10-18 | 2016-08-24 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Method for measuring a temperature |
| CN104237595A (en) * | 2014-06-26 | 2014-12-24 | 国家电网公司 | External current transformer |
| CN107192969A (en) * | 2016-03-15 | 2017-09-22 | 精工半导体有限公司 | Magnetic Sensor and its manufacture method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |