CN1570654A - Magnetic core sheath free coil magnetic core pack for current sensor - Google Patents
Magnetic core sheath free coil magnetic core pack for current sensor Download PDFInfo
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- CN1570654A CN1570654A CN 200410014760 CN200410014760A CN1570654A CN 1570654 A CN1570654 A CN 1570654A CN 200410014760 CN200410014760 CN 200410014760 CN 200410014760 A CN200410014760 A CN 200410014760A CN 1570654 A CN1570654 A CN 1570654A
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Abstract
This invention discloses small and convenient coil magnetic core components for current sensor which is of no sheath, circular magnetic core with plastic fixing frames as a whole and with magneto sensor self centered and is connected with circuit printing board. It comprises circular magnetic core with air space, coil, and fixing frames. And out-leading end of coil is connected with current sensor circuit printing board directly or through pin. Its characteristics are the following: 1, the fixing frame is fluted with slots of same sizes with magneto sensor and slots are located in the center of air space, the both ends of circular magnetic core air space are symmetrically fixed on the fixing hubs on both sides of slots on the fixing frame; 2, the coil is rolled around the circular magnetic core surface with isolation materials sprayed on it.
Description
Technical field
The present invention relates to a kind of electronic package, the specifically a kind of current sensor that does not have magnetic core sheath coil core assembly.
Background technology
Current sensor is a kind of application electronic devices and components very widely, and it is widely used in various Semiconductor Converting Technologies, exchange numerical control device and with in the automatic control field of electric current as controlling object.
Current sensor has open loop, two kinds of structures of closed loop usually, and the closed loop current sensor is generally by the circuit in coil core assembly and the circuit printed board and install and fix shell and form.The coil core assembly comprises magnetic core, coil, plastic sheath.Existing structure is earlier soft magnetic ribbon to be turned to annular, opens an air gap on magnetic core, puts plastic sheath, and coiling is formed the coil core assembly on plastic sheath.The magnetic core air gap is aimed at the magneto sensor that connects with the circuit printed board, magneto sensor is inserted in the air gap, assembly is directly installed or be fixed in the circuit printed board with glue.There are the following problems for this structure:
One, soft magnetic ribbon is processed into magnet ring, adds sheath, and the magnet ring cross section increases, and is square; Coil tracks is long, internal resistance is big; The linear sensor scope is little, the antisaturation ability.For reducing the coil internal resistance, add the thick line footpath, both increased sensor bulk and weight, be unfavorable for the sensor miniaturization, consume more copper materials again, cause the sensor cost to increase.
When two, inserting magneto sensor in the magnetic core air gap of coil core assembly, can't guarantee to install consistance, thereby influence the sensor performance consistance; During debugging, the regulating winding number of turn was both consuming time artificially, and was bothersome again.
Three, the coil core assembly is difficult for installing and fixing with the circuit printed board, greatly reduces the reliability of sensor mass production processes consistance and sensor.
Summary of the invention
The purpose of this invention is to provide a kind of do not have the magnetic core sheath, toroidal core and plastics fixed mount be during integrally-built, magneto sensor can be returned in air gap automatically, with the current sensor coil core assembly of the no magnetic core sheath that the circuit printed board is easy to connect and volume is little.
Technical solution of the present invention is:
A kind of current sensor that does not have magnetic core sheath coil core assembly, comprise the toroidal core, coil, the fixed mount that have air gap, the coil exit links to each other with the printed board of current sensor circuit, it is characterized in that: have the slot that matches with the magneto sensor size on (1) fixed mount, slot is positioned at the center of air gap, and toroidal core air gap two port claims to be fixed on and is arranged in fixed cover slot two sides and that communicate with slot on the fixed mount; (2) be coated with insulating material on the surface of toroidal core, coil winding is on the surface of the toroidal core that is coated with insulating material.
The present invention also takes following technique measures:
(1) toroidal core of band air gap or form by the thread soft magnetic material of sub-thread, or form by the thread soft magnetic material of multiply.When toroidal core of the present invention is made up of the thread soft magnetic material of multiply, its number of share of stock should be three strands at least, and quantity is many more, the current sensor response speed is fast more, the thread soft magnetic material of multiply can fuse the thread soft magnetic material of multiply by coil when connecting, be processed into toroidal core after also can becoming the way of twisted shape that the thread soft magnetic material of multiply is fused, again at its surperficial winding around by first wringing.
(2) when core assembly of the present invention is vertical installation with the mounting structure of circuit printed board, two pins that link to each other with the coil exit are fixed in two chucking lugs on the fixed mount, and two chucking lugs lay respectively at two sides of toroidal core central plane.
And corresponding slot shape matches on the locating rack of the shape of above-mentioned chucking lug and installation coil core assembly.
(3) when core assembly of the present invention is parallel installation with the mounting structure of circuit printed board, on toroidal core, should be connected with at least three chucking lugs.
Chucking lug more than three or three can be evenly distributed on the toroidal core, also can be non-uniformly distributed on the toroidal core, but be the best to be evenly distributed on the toroidal core.
Chucking lug more than three or three can all not link to each other with fixed mount, can have a chucking lug to link to each other with fixed mount yet.
Chucking lug more than three or three can be fixed in the circuit printed board by self-tapping screw, this moment, the coil exit can directly link to each other with the circuit printed board, also can by with chucking lug that fixed mount links to each other in the pin that links to each other with the coil exit add that the screw in other chucking lug links to each other with the circuit printed board.
(4) toroidal core or be circular ring type, or be square or be abnormity; Its cross sectional shape or be circular, or be that class is round, or be square, or be special-shaped.
Beneficial effect of the present invention:
1, the location slot that magneto sensor is installed on the fixed mount of the present invention can guarantee that magneto sensor is positioned on the magnetic core air gap geometric center position all the time, the high conformity of installation, thus guaranteed the consistency of performance of sensor.
2, monolithic construction helps the coiling and the location of coil; The cross sectional shape of toroidal core is circular in the coil core assembly of no plastic sheath, make under the condition of same line footpath, but the coiling number of turn is many, and the transducer range scope is big; Coil tracks is short, internal resistance is little, and the range of linearity of sensor is big, and the antisaturation ability strengthens; But simultaneously on a kind of toroidal core in scope of design the coil of the different numbers of turn of coiling, but that assembly is installed the geometric center position is identical, can dwindle the volume of current sensor greatly.
3, simple in structure, easily manufactured.The installation of magnet ring and plastics fixed mount can be adopted the disposable rapid shaping of injection molding technology; The locating rack supporting use relevant with another patented claim of applicant not only can be enhanced productivity greatly, and can be guaranteed the consistance of performance of current sensors.
4, with the circuit printed board be connected, install simple and reliable.The two pins that links to each other with the coil two ends is fixed on the chucking lug that is symmetrically distributed on the fixed mount in the pin bores, linking to each other with corresponding pad in the circuit printed board under the control of corresponding locating surface on the supporting with it locating rack, both accurately and reliably, played respective fixation effect again to locating rack; Or chucking lug is fixed in the circuit printed board by self-tapping screw.Simultaneously, the coil core assembly both can be installed with the circuit printed board is vertical, again can with the parallel installation of circuit printed board.
Description of drawings
Fig. 1 is one of structural representation of the present invention.
Fig. 2 is the left TV structure synoptic diagram of Fig. 1.
Fig. 3 is the A-A sectional structure synoptic diagram of Fig. 1.
Fig. 4 is two of a structural representation of the present invention.
Fig. 5 is the B-B sectional structure synoptic diagram of Fig. 4.
Fig. 6 is the C-C sectional structure synoptic diagram of Fig. 4.
Fig. 7 is the structural representation of the locating rack that matches with structure shown in Figure 1.
Fig. 8 is one of structural representation of toroidal core 1 of the present invention.
Fig. 9 be toroidal core 1 of the present invention structural representation two.
Figure 10 is three of a structural representation of the present invention.
Figure 11 is the D-D sectional structure synoptic diagram of Figure 10.
Figure 12 is the rear view of Figure 10.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Embodiment one.
As shown in Figure 1, 2, 3.
A kind of current sensor coil core assembly that does not have the magnetic core sheath comprises the toroidal core 1, coil 2, the fixed mount 3 that have air gap, and the exit of coil 2 links to each other with the circuit printed board by pin 11,12, and toroidal core 1 is installed with the circuit printed board is vertical.Toroidal core 1 can adopt thread soft magnetic material (can be materials such as metal, ferrite) to be processed into annular, leaves air gap 20 in its joint, and its cross sectional shape is circular.On fixed mount 3, have the slot 5 that matches with magneto sensor (as the HW302B type) size, slot 5 is positioned at the center of air gap 20, and toroidal core 1 air gap two ends 6,7 symmetries are fixed on and are arranged in slot 5 two sides on the fixed mount 3 and fixed cover 8,9 that communicate with slot 5; Be coated with insulating material 10 on the surface of toroidal core 1, coil 2 is wound on the surface of the toroidal core 1 that is coated with insulating material 10.Two pins 11,12 that link to each other with coil 2 exits are fixed in two chucking lugs 13,14 on the fixed mount 3, two chucking lugs 13,14 are positioned at two sides (is best with the symmetrical distribution) of toroidal core 1 center disc 15, and pin 11,12 links to each other with the circuit printed board.The shape of above-mentioned chucking lug 13,14 should match with the shape of corresponding slot 16 on the locating rack 7 in the patented claim of another relevant locating rack of applicant, the consistance when being beneficial to locate and produce in batches, and the structure of locating rack is as shown in Figure 7.
During concrete enforcement, the toroidal core 1 of band air gap 20 can be made up of the thread soft magnetic material of sub-thread, also can form by the thread soft magnetic material of multiply, when forming the toroidal core of being with air gap 20 by the thread soft magnetic material of multiply, its number of share of stock should be three strands at least, and quantity is many more, the current sensor response time is fast more, the thread soft magnetic material of multiply can fuse the thread soft magnetic material of multiply by coil 2 when connecting, be processed into toroidal core after also can becoming the way of twisted shape that the thread soft magnetic material of multiply is fused, again at its surperficial winding around 2 by first wringing.
In addition, during concrete enforcement, the annular of toroidal core 1 is except that can be annular, also can be rectangle, square or other special-shaped shape, its cross sectional shape is except can be circle, also can be similar round, square, rectangle or other special-shaped shape, wherein is best with the circle, its coil internal resistance minimum, capacity maximum.
Manufacture process of the present invention is: earlier the toroidal core that has air gap is processed into for the thread soft magnetic material of circular (also can be, square round into class, or abnormity) in the cross section; Toroidal core is embedded in the plastic pattern, and the fixed mount of band by the slot of magneto sensor size design, pin bores, chucking lug finished in injection moulding, and the toroidal core and the plastics fixed mount that obtain a band air gap are linked to be a black box.At the surface of toroidal core 1 spraying insulating material, again coil winding is being coated with on the toroidal core of insulating material, and the exit of coil 2 is being linked to each other with pin 11,12 then.
The connection procedure of present embodiment and circuit printed board is:
At first magneto sensor band minor amount of silicon rubber is inserted in the slot on the fixed mount 3 of the present invention, the leading foot of magneto sensor 5 in the slot that inserts on the fixed mount 3 is passed the guiding groove of forming by rib in the locating rack (hereinafter to be referred as locating rack) of another patent of invention of applicant, simultaneously two chucking lug cards on the fixed mount 3 are inserted in the locating slot in the locating rack, coil just in time is positioned in the arc groove on the locating rack, the hub of a spool plane overlaps with the central plane of arc groove, guaranteed the consistance of core center line, the bottom surface that magneto sensor is installed on the fixed mount 3 just in time is positioned at the junction of two arc grooves on the locating rack; And the leading foot of casting aside moving magneto sensor makes it and following locating piece 21 applyings, and four leading foots mutually insulated under the effect of rib, four leading foots that guaranteed magneto sensor from structure can short circuits, its centre distance does not change; When chucking lug 13,14 plug-in mountings put in place, cast aside four leading foot center lines that pin 11,12 on the moving chucking lug 13,14 makes it center line and magneto sensor point-blank, from printed board, pass the corresponding welding hole together and be pressed onto the end and weld.A kind of current sensor coil core assembly that does not have the magnetic core sheath of the present invention came to an end with being connected promptly of circuit printed board.
Present embodiment is applicable to that electric current is at the current sensor below 100 amperes.
Embodiment two.
Shown in Fig. 4,5,6.
A kind of current sensor coil core assembly that does not have the magnetic core sheath comprises the toroidal core 1, coil 2, the fixed mount 3 that have air gap, toroidal core 1 and the parallel installation of circuit printed board.Toroidal core 1 can adopt thread soft magnetic material (can be materials such as metal, ferrite) to be processed into rectangle, leaves air gap in its joint, and the cross sectional shape of toroidal core 1 is circular.Have the slot 5 that matches with the magneto sensor size on fixed mount 3, slot 5 is positioned at the center of air gap, and toroidal core 1 air gap two ends 6,7 symmetries are fixed on and are arranged in fixed cover 8,9 slot 5 two sides and that communicate with slot 5 on the fixed mount 3; Be coated with insulating material 10 on the surface of toroidal core 1, coil 2 is wound on the surface of the toroidal core 1 that is coated with insulating material 10, and the exit of coil 2 directly links to each other with the circuit printed board.Be provided with three chucking lugs 17,18,22 on toroidal core 1 altogether, chucking lug 22 links to each other with fixed mount 3, is processed with the pin bores that links to each other with the coil exit on the chucking lug 22, and pin is by after the pin bores, and that uses is fixed on fixed mount in the circuit printed board.
Two chucking lugs 17,18 of present embodiment are positioned at two corners of the corresponding another side in one side that toroidal core 1 links to each other with fixed mount 3, can be injection-moulded in the surface of toroidal core 1 in injection moulding fixed mount 3.
The same with embodiment one, the annular of the toroidal core 1 of present embodiment is except that can be rectangle, also can be circle, square or other special-shaped shape, its cross sectional shape is except can be circle, also can be similar round, square, rectangle or other special-shaped shape, wherein be best with the circle, coil internal resistance minimum, capacity maximum.Simultaneously, the toroidal core 1 of band air gap 20 both can be made up of the thread soft magnetic material of sub-thread, also can form by the thread soft magnetic material of multiply, when forming the toroidal core of being with air gap 20 by the thread soft magnetic material of multiply, its number of share of stock should be three strands at least, and quantity is many more, the current sensor response speed is fast more, the thread soft magnetic material of multiply can fuse the thread soft magnetic material of multiply by coil 2 when connecting, be processed into toroidal core after also can becoming the way of twisted shape that the thread soft magnetic material of multiply is fused, again at its surperficial winding around 2 by first wringing.
The manufacture method of present embodiment is identical with embodiment one.
The connection procedure of present embodiment and circuit printed board is:
At first with in the corresponding welding hole in the circuit printed board of four leading foots insertions of magneto sensor present embodiment, the slot aligned magnetic photosensitive elements on the fixed mount 3 is pressed onto the end with the coil core assembly; Chucking lug 17,18 usefulness self-tapping screws are fixed in the circuit printed board, with pin chucking lug 22 and circuit printed board are fixed, and coil pin 11,12 is welded; Again magneto sensor is touched in slot on earth, weld.
Present embodiment is applicable to that electric current is at 50～500 Ampere currents sensors.
Embodiment three.
As shown in figure 10.
A kind of current sensor coil core assembly that does not have the magnetic core sheath, comprise the toroidal core 1, coil 2, the fixed mount 3 that have air gap 20, the toroidal core 1 of band air gap 20 is made up of the thread soft magnetic material more than three strands or three strands (material can be soft magnetic materials such as metal, ferrite), be processed into annular, leave air gap in its joint, when connecting, the thread soft magnetic material more than three strands or three strands can it be fused by coil 2, also can become the way of twisted shape with its back processing toroidal core that fuses, again at its surperficial winding around 2 by first wringing.The exit of coil 2 directly links to each other with the circuit printed board, toroidal core 1 and the parallel installation of circuit printed board.The cross sectional shape of toroidal core 1 is a similar round.Have the slot 5 that matches with the magneto sensor size on fixed mount 3, slot 5 is positioned at the center of air gap 20, and toroidal core 1 air gap two ends 6,7 symmetries are fixed on and are arranged in fixed cover 8,9 slot 5 two sides and that communicate with slot on the fixed mount 3; Be coated with insulating material 10 on the surface of toroidal core 1, coil 2 is wound on the surface of the toroidal core 1 that is coated with insulating material 10.Three (or more than three) chucking lugs 23,24,25 link to each other with toroidal core 1, its distribution mode is to guarantee that the stressed relative equilibrium of circuit printed board is advisable, be processed with screw hole 19 on the chucking lug 23,24,25, coil core assembly of the present invention be fixed in the circuit printed board with self-tapping screw.
The chucking lug 23,24,25 of present embodiment can be injection-moulded in the surface of toroidal core 1 in injection moulding fixed mount 3.
The same with embodiment one, the annular of the toroidal core 1 of present embodiment also can be square or other special-shaped shape except that can be circle
The manufacture method of present embodiment is identical with embodiment one.
The connection procedure of present embodiment and circuit printed board is:
At first with in the corresponding welding hole in the circuit printed board of four leading foots insertions of magneto sensor present embodiment, with the slot aligned magnetic photosensitive elements on the fixed mount 3, the coil core assembly is pressed onto the end, with self-tapping screw chucking lug 23,24,25 and circuit printed board is fixed earlier; Magneto sensor is touched in slot on earth, weld; The exit of coil 2 and circuit printed board welded get final product.
Present embodiment is applicable to that electric current is at the current sensor more than 500 amperes.
Claims (9)
1, a kind of current sensor that does not have magnetic core sheath coil core assembly, comprise the toroidal core, coil, the fixed mount that have air gap, the coil exit links to each other with the printed board of current sensor circuit, it is characterized in that: have the slot that matches with the magneto sensor size on (1) fixed mount, slot is positioned at the center of air gap, and toroidal core air gap two port claims to be fixed on and is arranged in fixed cover slot two sides and that communicate with slot on the fixed mount; (2) be coated with insulating material on the surface of toroidal core, coil winding is on the surface of the toroidal core that is coated with insulating material.
2, the current sensor of no magnetic core sheath according to claim 1 coil core assembly is characterized in that the toroidal core of described band air gap or is made up of the thread soft magnetic material of sub-thread, or is made up of the thread soft magnetic material of multiply.
3, the current sensor of no magnetic core sheath according to claim 1 coil core assembly, it is characterized in that two pins that link to each other with the coil exit are fixed in two chucking lugs on the fixed mount, two chucking lugs lay respectively at two sides of toroidal core central plane.
4, corresponding slot shape matches on the current sensor of the no magnetic core sheath according to claim 3 coil core assembly, the shape that it is characterized in that chucking lug and the locating rack that the coil core assembly is installed.
5, the current sensor of no magnetic core sheath according to claim 1 coil core assembly is characterized in that being connected with at least three chucking lugs on toroidal core.
6, the current sensor of no magnetic core sheath according to claim 5 coil core assembly is characterized in that chucking lug is evenly distributed on the toroidal core.
7, the current sensor of no magnetic core sheath according to claim 5 coil core assembly is characterized in that or has a chucking lug to link to each other with fixed mount, or chucking lug does not all link to each other with fixed mount.
8, the current sensor of no magnetic core sheath according to claim 5 coil core assembly is characterized in that chucking lug is fixed in the circuit printed board by self-tapping screw.
9, the current sensor of no magnetic core sheath according to claim 1 coil core assembly is characterized in that toroidal core or for circular ring type, or be square or for special-shaped; Its cross sectional shape or be circular, or be that class is round, or be square, or be special-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014760 CN1255687C (en) | 2004-04-28 | 2004-04-28 | Magnetic core sheath free coil magnetic core pack for current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014760 CN1255687C (en) | 2004-04-28 | 2004-04-28 | Magnetic core sheath free coil magnetic core pack for current sensor |
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| Publication Number | Publication Date |
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| CN1570654A true CN1570654A (en) | 2005-01-26 |
| CN1255687C CN1255687C (en) | 2006-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410014760 Expired - Fee Related CN1255687C (en) | 2004-04-28 | 2004-04-28 | Magnetic core sheath free coil magnetic core pack for current sensor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102749491A (en) * | 2011-04-21 | 2012-10-24 | Abb股份有限公司 | Current sensor with a magnetic core |
| WO2013106959A1 (en) * | 2012-01-19 | 2013-07-25 | Zou Gaozhi | High-precision whole pcb-mounted closed-loop axisymmetric magnetic circuit magnetic core coil component for hall current sensor |
| CN103675403A (en) * | 2012-08-28 | 2014-03-26 | 国际商业机器公司 | Flexible current and voltage sensor |
| CN104412114A (en) * | 2012-06-28 | 2015-03-11 | 莱姆知识产权股份有限公司 | Electrical current transducer |
| CN105548650A (en) * | 2014-10-27 | 2016-05-04 | 弗兰克公司 | Flexible current sensor |
| CN106932620A (en) * | 2017-05-17 | 2017-07-07 | 郑州威达电子有限公司 | A kind of preparation method of current measurement coil and current measurement coil |
| WO2020232723A1 (en) * | 2019-05-23 | 2020-11-26 | 威刚科技股份有限公司 | Current sensing module and current sensing structure thereof |
| CN113848369A (en) * | 2021-09-24 | 2021-12-28 | 华北电力大学 | Rogowski coil type current sensor with zigzag air gap channel |
Families Citing this family (1)
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| JP4386281B2 (en) * | 2005-01-31 | 2009-12-16 | キヤノン株式会社 | Image processing method, image processing apparatus, and program |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749491B (en) * | 2011-04-21 | 2015-09-23 | Abb股份有限公司 | There is the current sensor of magnetic core |
| CN102749491A (en) * | 2011-04-21 | 2012-10-24 | Abb股份有限公司 | Current sensor with a magnetic core |
| WO2013106959A1 (en) * | 2012-01-19 | 2013-07-25 | Zou Gaozhi | High-precision whole pcb-mounted closed-loop axisymmetric magnetic circuit magnetic core coil component for hall current sensor |
| CN104520723A (en) * | 2012-01-19 | 2015-04-15 | 邹高芝 | High-precision whole PCB-mounted closed-loop axisymmetric magnetic circuit magnetic core coil component for hall current sensor |
| CN104412114A (en) * | 2012-06-28 | 2015-03-11 | 莱姆知识产权股份有限公司 | Electrical current transducer |
| CN103675403B (en) * | 2012-08-28 | 2016-08-17 | 国际商业机器公司 | Flexible current and voltage sensor |
| CN103675403A (en) * | 2012-08-28 | 2014-03-26 | 国际商业机器公司 | Flexible current and voltage sensor |
| CN105548650A (en) * | 2014-10-27 | 2016-05-04 | 弗兰克公司 | Flexible current sensor |
| EP3015871A1 (en) * | 2014-10-27 | 2016-05-04 | Fluke Corporation | Flexible current sensor |
| US9541581B2 (en) | 2014-10-27 | 2017-01-10 | Fluke Corporation | Flexible current sensor |
| TWI691726B (en) * | 2014-10-27 | 2020-04-21 | 美商富克有限公司 | Flexible current sensor |
| CN105548650B (en) * | 2014-10-27 | 2020-11-06 | 弗兰克公司 | Flexible current sensor |
| CN106932620A (en) * | 2017-05-17 | 2017-07-07 | 郑州威达电子有限公司 | A kind of preparation method of current measurement coil and current measurement coil |
| CN106932620B (en) * | 2017-05-17 | 2019-05-28 | 郑州威达电子有限公司 | A kind of production method of current measurement coil and current measurement coil |
| WO2020232723A1 (en) * | 2019-05-23 | 2020-11-26 | 威刚科技股份有限公司 | Current sensing module and current sensing structure thereof |
| CN113848369A (en) * | 2021-09-24 | 2021-12-28 | 华北电力大学 | Rogowski coil type current sensor with zigzag air gap channel |
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| Publication number | Publication date |
|---|---|
| CN1255687C (en) | 2006-05-10 |
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Assignee: Nanjing tuoken Electronic Technology Co., Ltd. Assignor: Zou Gaozhi Contract fulfillment period: 2009.1.20 to 2014.1.21 Contract record no.: 2009320000021 Denomination of invention: Magnetic core sheath free coil magnetic core pack for current sensor Granted publication date: 20060510 License type: Exclusive license Record date: 20090122 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.1.20 TO 2014.1.21; CHANGE OF CONTRACT Name of requester: NANJING TUOKEN ELECTRONIC SCIENCE CO., LTD. Effective date: 20090122 |
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Granted publication date: 20060510 Termination date: 20190428 |
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