CN103646766A - Ultra-thin large current transformer - Google Patents
Ultra-thin large current transformer Download PDFInfo
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- CN103646766A CN103646766A CN201310563508.8A CN201310563508A CN103646766A CN 103646766 A CN103646766 A CN 103646766A CN 201310563508 A CN201310563508 A CN 201310563508A CN 103646766 A CN103646766 A CN 103646766A
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- current
- current transformer
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- integrated package
- busbar
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Abstract
The invention discloses an ultra-thin large current transformer which comprises a main conducting bar (1), two shunt conducting bars (2), a circuit board (3), a current collecting manifold block (4) and a secondary output wire (5), wherein the two shunt conducting bars (2) are connected to the two ends of the main conducting bar (1) respectively, the circuit board (3) is welded between the two shunt conducting bars (2), and the current collecting manifold block (4) is welded on the circuit board (3). In this way, rated current intensity can be set according to the cross section of the main conducting bar and the cross sections of the shunt conducting bars, the rated current intensity can be designed to be several kilo-amperes, the size and thickness of the current transformer are quite small, and therefore the current transformer can be used in a current protection product with a compact structure; the primary isolation voltage and secondary isolation voltage of the current transformer can reach 2kv; the current transformer can measure alternating currents and direct currents and is high in accuracy and linearity.
Description
Technical field
The present invention relates to current transformer field, particularly relate to a kind of ultra-thin great current mutual inductor.
Background technology
Current transformer, is generally through measure traverse line electric current on ampere wires with soft magnetic material.Such instrument transformer volume is very large, or at wire, penetrate shunt resistance and obtain sampled voltage, this instrument transformer can not directly be isolated with secondary voltage, and low-voltage electrical apparatus miniaturization is at present the trend of market application, with regard to needing, a kind of volume is little and isolation voltage is high, precision is high, can measure the current transformer of alternating current and direct current simultaneously.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of ultra-thin great current mutual inductor; can measure AC and DC electric current; output 0-5V voltage; this current transformer be once greater than 2kV with the isolation voltage of secondary; this current transformer volume is little, is applicable to the low-voltage electrical apparatus of the large current protection of compact conformation.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of ultra-thin great current mutual inductor is provided, comprises: main busbar, two shunting busbars, wiring board, current acquisition integrated package and secondary output leads; The two ends of described main busbar are connected with respectively a shunting busbar, and described wiring board is welded between two shunting busbars, and described current acquisition integrated package welding in the circuit board.
Preferably, described secondary output lead welding in the circuit board.
Preferably, the resistance of described main busbar is less than the resistance after shunting busbar is connected with current acquisition integrated package.
Preferably, described current acquisition integrated package is the electronics paster integrated package of secondary output 0-5V voltage.
The invention has the beneficial effects as follows: the present invention can measure AC and DC electric current, and volume is little, is applicable to the low-voltage electrical apparatus of the large current protection of compact conformation.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of ultra-thin great current mutual inductor of the present invention;
Fig. 2 be shown in a kind of equivalent electrical schematic of ultra-thin great current mutual inductor;
In accompanying drawing, the mark of each parts is as follows: 1, main busbar; 2, shunting busbar; 3, wiring board; 4,, current acquisition integrated package; 5, secondary output lead.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Refer to Fig. 1 and Fig. 2, the embodiment of the present invention comprises:
A ultra-thin great current mutual inductor, as shown in Figure 1, comprising: main busbar 1, two shunting busbars 2, wiring board 3, current acquisition integrated package 4 and secondary output leads 5; The two ends of described main busbar 1 are connected with respectively a shunting busbar 2, and described wiring board 3 is welded between two shunting busbars 2, and described current acquisition integrated package 4 is welded on wiring board 3; Described secondary output lead 5 is welded on wiring board 3; The resistance of described main busbar 1 is less than the resistance after shunting busbar 2 is connected with current acquisition integrated package 4; Described current acquisition integrated package 4 is the electronics paster integrated package of secondary output 0-5V voltage.
Measured current I is by main busbar 1 and shunting busbar 2, form two-way electric current I 1 and I2, because the resistance of main busbar 1 is less than the resistance that shunting busbar 2 adds current acquisition integrated package 4, the electric current of the current acquisition integrated package 4 of flowing through is like this just very little and be proportional to measured current I.
That is: I=I1+I2
The electric current current acquisition integrated package 4 of flowing through, current acquisition integrated package 4 electric current convert to linearly 0 ~ 5V voltage by 5 outputs of secondary output lead for measuring equipment.
As shown in Figure 2, the equivalent resistance of main busbar 1 is R1 to equivalent electrical schematic diagram of the present invention, and the equivalent resistance of shunting busbar 2 is R2, and the equivalent resistance of current acquisition integrated package 4 and wiring board 3 is R3, and all-in resistance is like this:
R=1/{(1/R1)+[1/(R2+R3)]}
I=U/R
I1=U/R1
I2=U/(R2+R3)
Wherein U is the pressure drop at busbar two ends.
Because R1, R2, R3 manufacture rear resistance, be exactly therefore having of fixing:
I is directly proportional to U, and I2 is directly proportional to U again, and I is directly proportional to I2.
So the resistance coefficient that can be multiplied by busbar by I2 obtains I, realizes the measurement to I electric current.
Current acquisition integrated package 4 can be measured the AC and DC electric current of 0 ~ 20A, current conversion is become to the voltage of 0 ~ 5V, and current acquisition integrated package 4 once reach 2kV with the isolation voltage of secondary more than.
The present invention can arrange rated current size by the sectional area of main busbar and shunting busbar, and rated current can be designed into kilo-ampere level, and the shared volume of this current transformer and thickness are very little, are adapted at using in the current protection product of compact conformation; Current transformer once can reach 2kV with the isolation voltage of secondary, and this current transformer can measure AC and DC electric current, precision is high, the linearity is high.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (4)
1. a ultra-thin great current mutual inductor, is characterized in that, comprising: main busbar (1), two shunting busbars (2), wiring board (3), current acquisition integrated package (4) and secondary output leads (5); The two ends of described main busbar (1) are connected with respectively a shunting busbar (2), and described wiring board (3) is welded between two shunting busbars (2), and described current acquisition integrated package (4) is welded on wiring board (3).
2. a kind of ultra-thin great current mutual inductor according to claim 1, is characterized in that: described secondary output lead (5) is welded on wiring board (3).
3. a kind of ultra-thin great current mutual inductor according to claim 1, is characterized in that: the resistance of described main busbar (1) is less than the resistance after shunting busbar (2) is connected with current acquisition integrated package (4).
4. a kind of ultra-thin great current mutual inductor according to claim 1, is characterized in that: described current acquisition integrated package (4) is the electronics paster integrated package of secondary output 0-5V voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310563508.8A CN103646766A (en) | 2013-11-14 | 2013-11-14 | Ultra-thin large current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310563508.8A CN103646766A (en) | 2013-11-14 | 2013-11-14 | Ultra-thin large current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103646766A true CN103646766A (en) | 2014-03-19 |
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ID=50251966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310563508.8A Pending CN103646766A (en) | 2013-11-14 | 2013-11-14 | Ultra-thin large current transformer |
Country Status (1)
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| CN (1) | CN103646766A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700476A (en) * | 2013-12-20 | 2014-04-02 | 苏州长量电器有限公司 | Ultrathin large-current transformer |
| CN105067861A (en) * | 2015-08-22 | 2015-11-18 | 安徽千恩智能科技股份有限公司 | Divided-flow current sampling mutual inductor |
| CZ306402B6 (en) * | 2016-01-25 | 2017-01-04 | Univerzita Hradec Králové | Induction type current shunt |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0634667A (en) * | 1992-07-16 | 1994-02-10 | Hitachi Ltd | Measuring device for current of dc main circuit and dc circuit breaker using the same |
| GB2473014A (en) * | 2009-08-27 | 2011-03-02 | Sean Christopher Ganley | Single and multi-phase current sensor and current transformer |
| CN102969136A (en) * | 2012-11-17 | 2013-03-13 | 郑州三晖电气股份有限公司 | High-current high-accuracy direct-current current transformer |
| CN203054054U (en) * | 2013-01-21 | 2013-07-10 | 大连新大路电气传动技术有限责任公司 | High voltage precise direct current transformer |
| CN203607236U (en) * | 2013-11-14 | 2014-05-21 | 苏州长量电器有限公司 | Ultrathin large current mutual inductor |
-
2013
- 2013-11-14 CN CN201310563508.8A patent/CN103646766A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0634667A (en) * | 1992-07-16 | 1994-02-10 | Hitachi Ltd | Measuring device for current of dc main circuit and dc circuit breaker using the same |
| GB2473014A (en) * | 2009-08-27 | 2011-03-02 | Sean Christopher Ganley | Single and multi-phase current sensor and current transformer |
| CN102969136A (en) * | 2012-11-17 | 2013-03-13 | 郑州三晖电气股份有限公司 | High-current high-accuracy direct-current current transformer |
| CN203054054U (en) * | 2013-01-21 | 2013-07-10 | 大连新大路电气传动技术有限责任公司 | High voltage precise direct current transformer |
| CN203607236U (en) * | 2013-11-14 | 2014-05-21 | 苏州长量电器有限公司 | Ultrathin large current mutual inductor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700476A (en) * | 2013-12-20 | 2014-04-02 | 苏州长量电器有限公司 | Ultrathin large-current transformer |
| CN105067861A (en) * | 2015-08-22 | 2015-11-18 | 安徽千恩智能科技股份有限公司 | Divided-flow current sampling mutual inductor |
| CZ306402B6 (en) * | 2016-01-25 | 2017-01-04 | Univerzita Hradec Králové | Induction type current shunt |
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Application publication date: 20140319 |