CN1168104C - AC current dividing current transformer - Google Patents
AC current dividing current transformer Download PDFInfo
- Publication number
- CN1168104C CN1168104C CNB001178369A CN00117836A CN1168104C CN 1168104 C CN1168104 C CN 1168104C CN B001178369 A CNB001178369 A CN B001178369A CN 00117836 A CN00117836 A CN 00117836A CN 1168104 C CN1168104 C CN 1168104C
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- current
- dividing
- phase
- electric conductor
- current transformer
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Abstract
The present invention relates to an AC current dividing current transformer which belongs to an electric appliance element for measuring an AC current. The present invention is characterized in that A dividing hole is arranged on a dividing electric conductor; an AC detector is arranged on the upper end frame of the dividing hole; a correction electromagnet is arranged on the lower end frame of the dividing hole; bolt holes are respectively arranged at the left end and the right end of the dividing electric conductor; a conductive strip is fixedly arranged on the dividing electric conductor by screw bolts. Due to the adoption of a dividing structure, the present invention only uses a small part of current for detection. No matter how much a current for detection, a detector element is used. The present invention is an integrated module with strong installation performance and has the advantages of strong anti-jamming capability, small volume and strong reliability. The present invention is mainly used for the current detection of three-phase power electronic devices, is particularly suitable for single-phase, two-phase and three-phase switches and can be used as a detection element in electronic circuits such as open-phase protection, unbalance protection of a three-phase current and overcurrent circuit protection of inverse time lag.
Description
One, technical field:
The present invention relates to a kind of AC current dividing current transformer, belong to the electric elements of measuring alternating current.
Two, background technology:
At present, AC current detection device has two big classes.One class is to adopt common three single-phase transformers to form the three-phase instrument transformer, and another kind of is that three single-phase Hall elements are formed the three-phase detection device, is exactly various electrical quantity sensors in addition.As: disclosed instrument transformer in " section's sea module " book that Beijing Ke Hai practical technique research institute publishes, mostly be to utilize Hall effect, adopt the magnetic compensation principle, tested loop and test loop insulation, this instrument transformer, the sample circuit volume is big, power output is big, and all need will all detect electric current by its detecting element itself, so checkout gear can not be done very little, and the detecting element disunity, the cost height.
Three, summary of the invention:
The object of the present invention is to provide a kind of volume little, detecting element is unified, and cost is low, a kind of AC current dividing current transformer that reliability and antijamming capability are strong.
The object of the present invention is achieved like this:
The present invention includes the shunting electric conductor, detects current transformer, proofread and correct electromagnet, it is characterized in that: have tap hole on the shunting electric conductor, on the upper end frame of tap hole the detection current transformer is housed, the correction electromagnet is housed on the frame of lower end, the two ends, the left and right sides of shunting electric conductor have two bolts hole, and busbar is fixed by bolt and is installed on the shunting electric conductor.
Detecting current transformer is made up of ferromagnetic core, coil, skeleton, the skeleton top is provided with a pair of symmetrical binding post, be tied with coil on frame center's hole outer surface, two connector lugs of coil join with the binding post of two symmetries respectively, and ∏ font ferromagnetic core passes frame center hole and ∏ font ferromagnetic core to being connected into closed loop.
The present invention is owing to adopt flow dividing structure on the shunting electric conductor, so only the sub-fraction electric current is detected, no matter detect great electric current, all adopt a kind of detection current transformer, and small product size is little, detect big electric current, little many more of the general instrument transformer volume of the volume ratio of AC current dividing current transformer, and the current branch ratio of shunting electric conductor can adopt processing copper coin cross section to adjust split ratio in the shunting instrument transformer, therefore the electric current antijamming capability of output is strong, the reliability height, and cost is low.
Four, description of drawings:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a profile of the present invention;
Fig. 3 is an end view of the present invention;
Fig. 4 shunts the conductor construction schematic diagram for the present invention;
Fig. 5 proofreaies and correct the electromagnet profile for the present invention;
Fig. 6 is a circuit working schematic diagram of the present invention.
Five, embodiment:
The present invention has tap hole 4 on shunting electric conductor 1, be equipped with on the upper end frame of tap hole 4 and detect current transformer 2, detecting current transformer 2 is made up of ferromagnetic core 7, coil 8, skeleton 9, skeleton 9 tops are provided with a pair of symmetrical binding post 10, be tied with coil 8 on frame center's hole outer surface, two connector lugs of coil 8 are connected with the binding post 10 of two symmetries respectively, and ∏ font ferromagnetic core 7 passes skeleton 9 centre bores and 7 pairs of ∏ font ferromagnetic cores are connected into closed loop.Be equipped with on the tap hole 4 lower end frames and proofread and correct electromagnet 3, correction electromagnet 3 is connected by two ∏ font ferromagnetic cores and constitutes the magnetic closed loop.Shunting has hole 5 and 6 on the limit, electric conductor 1 two ends, and fastening bolt is housed on the hole, and it is fixedly mounted on and shunts electric conductor 1 both sides busbar with base by bolt passing through bolt hole 5,6.
Shunting electric conductor 1 is a copper coin, processes a tap hole 4 according to the shunting ratio on copper coin, makes it produce a branch.Be located at and detect a single-phase alternating current I on this AC current dividing current transformer
Always, I
AlwaysEnter shunting electric conductor 1 through a side conductive row, shunt, make the sub-fraction electric current I by tap hole 4
1Detect another part electric current I by detecting current transformer 2
2By proofreading and correct electromagnet 3, I
1And I
2Flow out induced current I by the opposite side busbar
3Detect electric current I by detecting current transformer 2 outputs
3, make I
AlwaysWith I
3Keep apart independent signal source of extraction.As: when detection current transformer 2 is 100A/0.005A, total current is 500 amperes a AC current dividing current transformer, should be processed into 4: 1 proportionate relationship to branch's sectional area of shunting electric conductor 1, detect the value that current transformer just can obtain 500A/0.005A this moment, owing in alternating current circuit, have inductance to exist, so at I
1The current circuit impedance is greater than I
2The current circuit impedance, and can not just in time be proportional, so at I
2The correction electromagnet of adorning on the current circuit 3 is to proofread and correct I
2Inductance in the circuit, the inductance of proofreading and correct electromagnet 3 equals to detect 1/4 of current transformer inductance value.
As when detecting current transformer 2 for 100A/0.005A, total current is 200 amperes a AC current dividing current transformer, should be processed into 1: 1 proportionate relationship to branch's sectional area of shunting electric conductor 1, detect the value that current transformer 2 just can obtain 200A/0.005A, the inductance that proofread and correct electromagnet 3 this moment equals to detect 1/1 of current transformer inductance value.
As when detecting current transformer 2 for 100A/0.005A, total current is 1000 amperes a AC current dividing current transformer, should be processed into 9: 1 proportionate relationship to branch's sectional area of shunting electric conductor 1, detect the value that current transformer 2 just can obtain 1000A/0.005A, the inductance that proofread and correct electromagnet 3 this moment equals to detect 1/9 of current transformer inductance value.
Calculate the processing ratio that just can obtain following different technical indicator branch sectional area according to this according to above-mentioned example, technical indicator can be set according to actual needs.As technical indicator be: 50A, 100A, 150A, 250A, 300A, 350A, 400A, 450A, 550A, 600A, 650A, 700A, 750A, 800A, 850A, 900A, 950A, 1200A, 1500A, 2000A, 2500A, 3000A, 3500A, 4000A, 4500A, 5000A, 7000A, 8000A, 10000A/0.005A, 5V (single-phase, two-phase, three-phase).
As use two unit of single phase alternating current (A.C.) current dividing current transformer, then can become the two-phase alternating current current dividing current transformer.
As use three unit of single-phase transformers then can become the three-phase alternating current current dividing current transformer.
Make up the more number of phases as need, then can carry out parallel connection on demand.
Claims (2)
1, AC current dividing current transformer, include shunting electric conductor (1), detect current transformer (2), it is characterized in that: have tap hole (4) on the shunting electric conductor (1), be equipped with on the upper end frame of tap hole (4) and detect current transformer (2), be equipped with on the frame of lower end and proofread and correct electromagnet (3), the two ends, the left and right sides of shunting electric conductor (1) have bolt hole (5) and (6), and busbar is fixed by bolt and is installed on the shunting electric conductor (1).
2, AC current dividing current transformer according to claim 1, it is characterized in that: detect current transformer and form by ferromagnetic core (7), coil (8), skeleton (9), skeleton (9) top is provided with a pair of symmetrical binding post (10), be tied with coil (8) on frame center's hole outer surface, two connector lugs of coil join with the binding post (10) of two symmetries respectively, and П font ferromagnetic core (7) passes skeleton (9) centre bore and П font ferromagnetic core (7) to being connected into closed loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001178369A CN1168104C (en) | 2000-05-24 | 2000-05-24 | AC current dividing current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001178369A CN1168104C (en) | 2000-05-24 | 2000-05-24 | AC current dividing current transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1325121A CN1325121A (en) | 2001-12-05 |
| CN1168104C true CN1168104C (en) | 2004-09-22 |
Family
ID=4587076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001178369A Expired - Fee Related CN1168104C (en) | 2000-05-24 | 2000-05-24 | AC current dividing current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1168104C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101162243A (en) * | 2007-08-10 | 2008-04-16 | 吴焕雄 | Split stream conducting wire testing apparatus and testing method thereof |
| JP6341427B2 (en) * | 2015-01-21 | 2018-06-13 | 株式会社オートネットワーク技術研究所 | Circuit structure and electrical junction box |
-
2000
- 2000-05-24 CN CNB001178369A patent/CN1168104C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1325121A (en) | 2001-12-05 |
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| SE01 | Entry into force of request for substantive examination | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040922 Termination date: 20150524 |
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| EXPY | Termination of patent right or utility model |