CN204269715U - A kind of AC current detection device based on Luo-coil - Google Patents
A kind of AC current detection device based on Luo-coil Download PDFInfo
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- CN204269715U CN204269715U CN201420746053.3U CN201420746053U CN204269715U CN 204269715 U CN204269715 U CN 204269715U CN 201420746053 U CN201420746053 U CN 201420746053U CN 204269715 U CN204269715 U CN 204269715U
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Abstract
The utility model discloses a kind of AC current detection device based on Luo-coil, comprising: Luo-coil part and voltage follower part; Wherein: the toroid winding that Luo-coil part comprises flexible non magnetic skeleton and is wound on flexible non magnetic skeleton; Described voltage follower part comprises voltage follower; Described toroidal two outlet terminals are electrically connected with the signal input terminal of voltage follower respectively.By adopting technique scheme, this kind of current sensing means be not containing unshakable in one's determination, therefore without phenomenons such as magnetic saturation, ferroresonance, remanent magnetism unshakable in one's determination, measurement range is large, and measure linear degree is good, and measuring accuracy is high.This kind of current sensing means secondary exports the voltage signal for being directly proportional to once tested electric current, and secondary current is little, the danger such as overheated and second open circuit high voltage without secondary.This kind of current sensing means can realize once tested for small area analysis signal time, secondary exports and even lies prostrate magnitude voltage signals for millivolt up to a hundred, and without the need to amplifying circuit, antijamming capability is strong.
Description
Technical field
The utility model relates to current transformer technical field, particularly relates to a kind of AC current detection device based on Luo-coil.
Background technology
Current transformer principle is according to electromagnetic induction principle.Current transformer is made up of the iron core closed and winding.Current transformer and transformer ' s type like being also according to electromagnetic induction principle work, transformer conversion being voltage and current transformer conversion be electric current.Current transformer connects the winding (number of turn is N1) of tested electric current, is called a winding (or former limit winding, armature winding); The winding (number of turn is N2) connecing measurement instrument is called Secondary Winding (or vice-side winding, secondary winding).
Traditional current detecting mutual inductor mostly is core type current transformer, and this kind of Current Transformer Secondary exports as current signal, there is second open circuit high voltage risk; And long term overloading can cause, and secondary is overheated even to be burnt; In addition due to the existence of iron core, it is made to have iron core easily saturated, the shortcoming such as ferroresonance and remanent magnetism unshakable in one's determination.Based on the current transformer of Luo-coil due to not containing unshakable in one's determination, without magnetic saturation, without remanent magnetism, without ferroresonance, and due to Luo-coil Current Transformer Secondary electric current little, make its danger such as overheated and second open circuit without secondary.But traditional current sensing means based on Luo-coil need coordinate the uses such as amplifying circuit, filtering circuit, integrating circuit, phase-shift circuit, DC isolation circuit and zeroing circuit, and complex structure, cost is high, realizes difficulty large.
Utility model content
The technical problems to be solved in the utility model is: provide a kind of structure simple, is easy to realize, and can play the AC current detection device based on Luo-coil that Luo-coil detects alternating current advantage preferably.
The technical scheme that the utility model is taked for the technical matters existed in solution known technology is:
Based on an AC current detection device for Luo-coil, it is characterized in that: comprising: Luo-coil part (1) and voltage follower part (2); Wherein: the toroid winding that described Luo-coil part (1) comprises flexible non magnetic skeleton and is wound on the non magnetic skeleton of described flexibility; Described voltage follower part (2) comprises voltage follower; Described toroidal two outlet terminals are electrically connected with the signal input terminal of voltage follower respectively.
The advantage that the utility model has and good effect are: by adopting technique scheme, and this kind of current sensing means be not containing unshakable in one's determination, therefore without phenomenons such as magnetic saturation, ferroresonance, remanent magnetism unshakable in one's determination, measurement range is large, and measure linear degree is good, and measuring accuracy is high.This kind of current sensing means secondary exports the voltage signal for being directly proportional to once tested electric current, and secondary current is little, the danger such as overheated and second open circuit high voltage without secondary.This kind of current sensing means can realize once tested for small area analysis signal time, secondary exports and even lies prostrate magnitude voltage signals for millivolt up to a hundred, and without the need to amplifying circuit, antijamming capability is strong.This kind of current sensing means is furnished with a voltage follower, secondary voltage signal that the is stable and proportional relation becoming to determine with once tested electric current can be realized export, cost more traditional Luo-coil current sensing means is lower, and more easily realizes, and can play the advantage of Luo-coil better.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Wherein: 1, Luo-coil part; 2, voltage follower part.
Embodiment
For utility model content of the present utility model, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1, a kind of AC current detection device based on Luo-coil, comprising: Luo-coil part 1 and voltage follower part 2; Wherein: the toroid winding that described Luo-coil part 1 comprises flexible non magnetic skeleton and is wound on the non magnetic skeleton of described flexibility; Described voltage follower part 2 comprises voltage follower; Described toroidal two outlet terminals are electrically connected with the signal input terminal of voltage follower respectively.
Principle of work of the present utility model is: in Fig. 1: i (t) is tested electric current; E (t) is the output of Luo-coil secondary; U (t) is current sensing means output.Luo-coil is the close toroid winding be around on flexible non magnetic skeleton, and tested electric current is passed by hub of a spool perpendicular to coil plane, and Luo-coil secondary exports the voltage signal that e (t) is the proportional relation becoming to determine with tested electric current.Luo-coil secondary exports e (t) and connects the input end of voltage follower, and output u (t) of voltage follower is for stable output and be proportional to the voltage signal of tested electric current, is the output of this current sensing means.Export u (t) and u (t) proportional relation known with tested electric current by the current sensing means collected, tested current value can be obtained.This current sensing means structure is simple, is easy to realize, and can play the advantage that Luo-coil detects alternating current preferably.
Above embodiment of the present utility model has been described in detail, but described content being only preferred embodiment of the present utility model, can not being considered to for limiting practical range of the present utility model.All equalizations done according to the utility model application range change and improve, and all should still belong within patent covering scope of the present utility model.
Claims (1)
1. based on an AC current detection device for Luo-coil, it is characterized in that: comprising: Luo-coil part (1) and voltage follower part (2); Wherein: the toroid winding that described Luo-coil part (1) comprises flexible non magnetic skeleton and is wound on the non magnetic skeleton of described flexibility; Described voltage follower part (2) comprises voltage follower; Described toroidal two outlet terminals are electrically connected with the signal input terminal of voltage follower respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420746053.3U CN204269715U (en) | 2014-12-02 | 2014-12-02 | A kind of AC current detection device based on Luo-coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420746053.3U CN204269715U (en) | 2014-12-02 | 2014-12-02 | A kind of AC current detection device based on Luo-coil |
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| CN204269715U true CN204269715U (en) | 2015-04-15 |
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| CN201420746053.3U Active CN204269715U (en) | 2014-12-02 | 2014-12-02 | A kind of AC current detection device based on Luo-coil |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765422A (en) * | 2018-12-29 | 2019-05-17 | 华为数字技术（苏州）有限公司 | Current detecting system, the method and detection device for detecting electric current |
| CN110462409A (en) * | 2017-03-06 | 2019-11-15 | 尼洛吉公司 | The integrated isolated DC/AC current sensor of Neil effect in the pcb |
| DE102022117871A1 (en) | 2022-07-18 | 2024-01-18 | Infineon Technologies Ag | CURRENT SENSOR, SYSTEM WITH A CURRENT SENSOR AND METHOD FOR MEASURING A CURRENT TO BE MEASURED |
-
2014
- 2014-12-02 CN CN201420746053.3U patent/CN204269715U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110462409A (en) * | 2017-03-06 | 2019-11-15 | 尼洛吉公司 | The integrated isolated DC/AC current sensor of Neil effect in the pcb |
| CN109765422A (en) * | 2018-12-29 | 2019-05-17 | 华为数字技术（苏州）有限公司 | Current detecting system, the method and detection device for detecting electric current |
| US11933820B2 (en) | 2018-12-29 | 2024-03-19 | Huawei Digital Power Technologies Co., Ltd. | Current detection system, current detection method, and detection apparatus |
| DE102022117871A1 (en) | 2022-07-18 | 2024-01-18 | Infineon Technologies Ag | CURRENT SENSOR, SYSTEM WITH A CURRENT SENSOR AND METHOD FOR MEASURING A CURRENT TO BE MEASURED |
| DE102022117871B4 (en) | 2022-07-18 | 2024-03-14 | Infineon Technologies Ag | CURRENT SENSOR, SYSTEM WITH A CURRENT SENSOR AND METHOD FOR MEASURING A CURRENT TO BE MEASURED |
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