CN111983285A - Current sensing module and current sensing structure thereof - Google Patents
Current sensing module and current sensing structure thereof Download PDFInfo
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- CN111983285A CN111983285A CN201910433710.6A CN201910433710A CN111983285A CN 111983285 A CN111983285 A CN 111983285A CN 201910433710 A CN201910433710 A CN 201910433710A CN 111983285 A CN111983285 A CN 111983285A
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- 229910000976 Electrical steel Inorganic materials 0.000 claims description 5
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- 238000004663 powder metallurgy Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
- G01R15/207—Constructional details independent of the type of device used
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
- G01R15/202—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using Hall-effect devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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Abstract
The invention discloses a current sensing module and a current sensing structure thereof. The current sensing structure includes an annular body portion, a first end portion, a second end portion and a slot. The first end portion is connected to one end of the annular body portion, and a first chamfer is formed on the first end portion. The second end portion is connected to the other end of the annular body portion, and a second chamfer is formed on the second end portion. The slot is located between the first end and the second end. Therefore, the invention achieves the effects of improving the uniformity of the air gap magnetic flux density and improving the measurement range of the current value.
Description
Technical Field
The present invention relates to a sensing module and a sensing structure thereof, and more particularly, to a current sensing module and a current sensing structure thereof.
Background
First, with the global issue of energy saving and carbon reduction, the requirements of each country for the quality and performance of new energy vehicles are increasing, and the requirements of various parts are also increasing in order to meet the requirements of different regulations and different passenger groups.
However, as the performance of the electric vehicle increases, the voltage and/or current output by the driver of the electric vehicle also increases, and therefore issues of isolation of the control circuit and the requirement of a high current measurement range are derived. The current sensing structure in the prior art is mostly made of iron oxide, and is easy to crack except for a low current measurement range. For example, the current sensing structure of the prior art has a maximum measurement range of only about 200 Arms.
Therefore, how to improve the measurement range of the current sensing structure and improve the reliability of the current sensing structure by improving the structure design has become one of the important issues to be solved by the industry.
Disclosure of Invention
The present invention provides a current sensing module and a current sensing structure thereof, aiming at the deficiencies of the prior art.
In order to solve the above technical problem, one of the technical solutions adopted by the present invention is to provide a current sensing structure, which includes: the connecting structure comprises an annular body part, a first end part, a second end part and a slot. The first end portion is connected to one end of the annular body portion, and a first chamfer is formed on the first end portion. The second end portion is connected to the other end of the annular body portion, and a second chamfer is formed on the second end portion. The slot is located between the first end and the second end.
Further, the annular body portion includes an annular outer surface and an annular inner surface corresponding to the annular outer surface, the first end portion includes a first end surface connected to the annular outer surface and the annular inner surface, and the second end portion includes a second end surface connected to the annular outer surface and the annular inner surface; the first chamfer is located between the first end surface and the annular inner surface, a first connecting surface is arranged between the first end surface and the annular inner surface, the second chamfer is located between the second end surface and the annular inner surface, and the second end surface and the annular inner surface are provided with a second connecting surface.
Further, the annular body has a predetermined outer diameter, a predetermined inner diameter and a predetermined width, the first chamfer has a first predetermined edge width and a second predetermined edge width, and the second chamfer has a third predetermined edge width and a fourth predetermined edge width; wherein the first predetermined edge width dimension is less than the predetermined width dimension and the third predetermined edge width dimension is less than the predetermined width dimension; wherein the first predetermined edge width dimension is less than 50% of the predetermined width dimension and the third predetermined edge width dimension is less than 50% of the predetermined width dimension; wherein the second predetermined edge width dimension is less than 50% of the predetermined width dimension and the fourth predetermined edge width dimension is less than 50% of the predetermined width dimension.
Furthermore, the current sensing structure is made of silicon steel.
Furthermore, the current sensing structure is composed of a plurality of sheet structures, and each sheet structure is stacked in sequence to form the current sensing structure; wherein each of the sheet structures includes the annular body portion, the first end portion, the second end portion, and the slot.
Still further, the current sensing structure further comprises: and the barrier layer is covered on the annular body part, the first end part and the second end part, wherein the barrier layer is made of a non-magnetic material or an insulating material.
Still further, the current sensing structure further comprises: the first positioning structure is arranged on the annular body part, and the second positioning structure is arranged on the annular body part and corresponds to the first positioning structure; the first positioning structure comprises a first positioning body connected with the annular body part and a first positioning part arranged on the first positioning body; the second positioning structure comprises a second positioning body connected with the annular body part and a second positioning part arranged on the second positioning body.
Still further, the current sensing structure further comprises: the first positioning structure is arranged on the annular body part, and the second positioning structure is arranged on the annular body part and corresponds to the first positioning structure; the current sensing structure is composed of a plurality of sheet structures, and each sheet structure is stacked in sequence to form the current sensing structure; wherein each of the sheet structures includes the annular body portion, the first end portion, the second end portion, the slot, the first positioning structure, and the second positioning structure, respectively; wherein the first locating feature of one of the two adjacent sheet structures abuts against the first locating feature of the other of the two adjacent sheet structures, and the second locating feature of one of the two adjacent sheet structures abuts against the second locating feature of the other of the two adjacent sheet structures.
Furthermore, the first end further comprises a third chamfer, and the second end further comprises a fourth chamfer; the third chamfer is positioned between the first end face and the annular outer surface, a third connecting face is arranged between the first end face and the annular outer surface, the fourth chamfer is positioned between the second end face and the annular outer surface, and the second end face and the annular outer surface are provided with a fourth connecting face.
In order to solve the above technical problem, another technical solution of the present invention is to provide a current sensing module, including: the current sensing device comprises a carrier plate, a current sensing structure and a current sensing element. The current sensing structure is arranged on the carrier plate and comprises an annular body part, a first end part, a second end part and a slot, wherein the first end part is connected to one end of the annular body part, a first chamfer is formed in the first end part, the second end part is connected to the other end of the annular body part, a second chamfer is formed in the second end part, and the slot is located between the first end part and the second end part. The current sensing element is disposed on and coupled to the carrier plate, and the current sensing element is disposed in the slot.
One of the benefits of the current sensing module and the current sensing structure thereof provided by the present invention is that the technical solutions of "the first end portion is connected to one end of the annular body portion, and the first end portion has a first chamfer", and "the second end portion is connected to the other end of the annular body portion, and the second end portion has a second chamfer", so as to improve the uniformity of the air gap magnetic flux density and improve the measurement range of the current value.
For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.
Drawings
Fig. 1 is a perspective assembly diagram of a current sensing module according to a first embodiment of the invention.
Fig. 2 is another perspective assembly diagram of the current sensing module according to the first embodiment of the invention.
Fig. 3 is an exploded perspective view of a current sensing module according to a first embodiment of the invention.
Fig. 4 is another exploded perspective view of the current sensing module according to the first embodiment of the invention.
Fig. 5 is a schematic perspective view of a current sensing structure according to a second embodiment of the present invention.
Fig. 6 is a schematic front view of a current sensing structure according to a second embodiment of the present invention.
Fig. 7 is a partially enlarged schematic view of a VII portion of fig. 6.
Fig. 8 is a perspective view of another embodiment of a current sensing structure according to a second embodiment of the present invention.
Fig. 9 is a schematic front view of another embodiment of a current sensing structure according to a second embodiment of the present invention.
Fig. 10 is an exploded perspective view of a current sensing structure according to a further embodiment of the present invention.
Fig. 11 is a schematic perspective view of a current sensing structure according to a third embodiment of the present invention.
Fig. 12 is a schematic front view of a current sensing structure according to a third embodiment of the present invention.
Fig. 13 is an exploded perspective view of another embodiment of a current sensing structure according to a third embodiment of the present invention.
Fig. 14 is a schematic view of a usage state of the current sensing module applied to the controller device according to the embodiment of the invention.
Detailed Description
The following description is provided for the embodiments of the current sensing module and the current sensing structure thereof, and those skilled in the art will understand the advantages and effects of the present invention from the disclosure of the present specification. The invention is capable of other and different embodiments and its several details are capable of modification and various other changes, which can be made in various details within the specification and without departing from the spirit and scope of the invention. The drawings of the present invention are for illustrative purposes only and are not intended to be drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used primarily to distinguish one element from another. In addition, the term "or" as used herein should be taken to include any one or combination of more of the associated listed items as the case may be.
First embodiment
First, referring to fig. 1 to 4, fig. 1 and 2 are respectively a schematic perspective assembly view of a current sensing module according to a first embodiment of the present invention, and fig. 3 and 4 are respectively a schematic perspective exploded view of the current sensing module according to the first embodiment of the present invention, which provides a current sensing module U and a current sensing structure 2 thereof. For example, the current sensing module U and the current sensing structure 2 thereof provided by the embodiment of the invention can be preferably applied to a driver of an electric vehicle, but the invention is not limited thereto. In addition, it should be noted that the first embodiment first describes the main structure of the current sensing module U, and the subsequent embodiments describe the structure of the current sensing structure 2.
As described above, referring to fig. 1 to 4 again, the current sensing module U includes: a carrier 1, a current sensing structure 2 and a current sensing device 3. The current sensing structure 2 and the current sensing element 3 may be disposed on the carrier 1, and the current sensing element 3 may be coupled to the carrier 1. It should be noted that although the current sensing structure 2 and the current sensing element 3 are provided on the same carrier board 1 in the drawings, in other embodiments, the current sensing structure 2 and the current sensing element 3 may be provided on different carrier boards 1. In other words, the current sensing structure 2 can be fixed to another carrier (not shown).
As mentioned above, for example, the carrier 1 may be a Printed Circuit Board (PCB), the Current sensing structure 2 may be a C-shaped magnetic ring, and the Current sensing element 3 may be a Hall Current sensing element (Hall Current Sensor). Further, the material of the current sensing structure 2 may be a magnetic conductive material, silicon steel or iron oxide, but the invention is not limited thereto. In addition, the current sensing structure 2 has a slot 24 (or Air gap), and the current sensing element 3 can be disposed in the slot 24 to sense the magnitude of the current. Furthermore, the current sensing element 3 is separate from the current sensing structure 2.
Second embodiment
First, referring to fig. 5 to 7, fig. 5 is a perspective view illustrating a current sensing structure according to a second embodiment of the present invention, fig. 6 is a front view illustrating the current sensing structure according to the second embodiment of the present invention, and fig. 7 is a partially enlarged view illustrating a VII portion of fig. 6. The construction of the current sensing arrangement 2 will be further explained below. In detail, the current sensing structure 2 may include an annular body 21, a first end 22, a second end 23, and a slot 24, wherein the annular body 21 may surround a sensing space 210, and the slot 24 may be located between the first end 22 and the second end 23. Further, the first end portion 22 may be connected to one end of the annular body portion 21, the first end portion 22 may have a first chamfer 221(chamfer), the second end portion 23 may be connected to the other end of the annular body portion 21, and the second end portion 23 has a second chamfer 231. In addition, the annular body portion 21 may include an annular outer surface 211 and an annular inner surface 212 corresponding to the annular outer surface 211, the first end portion 22 may include a first end surface 220 connected between the annular outer surface 211 and the annular inner surface 212, and the second end portion 23 may include a second end surface 230 connected between the annular outer surface 211 and the annular inner surface 212. The first chamfer 221 may be located between the first end face 220 and the annular inner surface 212 and the second chamfer 231 may be located between the second end face 230 and the annular inner surface 212, i.e., the first chamfer 221 and the second chamfer 231 may be adjacent to the sensing space 210. For example, the first chamfer 221 and/or the second chamfer 231 may be a chamfer or a fillet, but the invention is not limited thereto.
As mentioned above, referring to fig. 5 to 7 again, by the arrangement of the first chamfer 221 and the second chamfer 231, a first connection surface 2210 may be provided between the first end surface 220 and the annular inner surface 212, and a second connection surface 2310 may be provided between the second end surface 230 and the annular inner surface 212. Further, when the first chamfer 221 and the second chamfer 231 are chamfered, the first connection surface 2210 and the second connection surface 2310 are inclined surfaces, and when the first chamfer 221 and the second chamfer 231 are chamfered, the first connection surface 2210 and the second connection surface 2310 are arc surfaces. In addition, although the chamfer is exemplified in the embodiment of the present invention, in other embodiments, the first chamfer 221 and the second chamfer 231 may be rounded.
In view of the above, referring to fig. 5 to 7 again, for the embodiment of the present invention, the first end portion 22 may further have a third chamfer 222 corresponding to the first chamfer 221, and the second end portion 23 may have a fourth chamfer 232 corresponding to the second chamfer 231. Third chamfer 222 may be located between first end face 220 and annular outer surface 211, and fourth chamfer 232 may be located between second end face 230 and annular outer surface 211. For example, the third chamfer 222 and/or the fourth chamfer 232 may be a chamfer or a fillet, but the invention is not limited thereto. Further, by the third chamfer 222 and the fourth chamfer 232, a third connection surface 2220 may be formed between the first end surface 220 and the annular outer surface 211, and a fourth connection surface 2320 may be formed between the second end surface 230 and the annular outer surface 211. In other words, when the third chamfer 222 and the fourth chamfer 232 are chamfered, the third connection surface 2220 and the fourth connection surface 2320 are inclined surfaces, and when the third chamfer 222 and the fourth chamfer 232 are chamfered, the third connection surface 2220 and the fourth connection surface 2320 are arc surfaces. In addition, although the chamfer is exemplified in the embodiment of the present invention, in other embodiments, the third chamfer 222 and the fourth chamfer 232 may be rounded. Moreover, it is worth mentioning that the first end surface 220 may be located between the first connection surface 2210 and the third connection surface 2220, and the second end surface 230 may be located between the second connection surface 2310 and the fourth connection surface 2320.
As mentioned above, referring to fig. 5 to 7 again, the annular body 21 may have a predetermined outer diameter D, a predetermined inner diameter D and a predetermined width B, and the predetermined width B may be a width of the annular body 21, i.e. a half of a difference between the predetermined outer diameter D and the predetermined inner diameter D. For example, the predetermined outer diameter D may be greater than 9 millimeters (mm), the predetermined inner diameter D may be greater than 5 mm, the predetermined width B may be greater than 2 mm, a cross-sectional area of the annular body 21 may be greater than 25 mm, the slot 24 may have a predetermined gap G, and the predetermined gap G may be between 3 mm and 5 mm, but the invention is not limited thereto. In addition, in other embodiments, the predetermined width B may be between 5 mm and 10 mm, but the invention is not limited thereto.
In light of the above, the first chamfer 221 may have a first predetermined edge width L1 and a second predetermined edge width L2, and the second chamfer 231 may have a third predetermined edge width L3 and a fourth predetermined edge width L4. Further, the first chamfer 221 and the second chamfer 231 of the present invention are illustrated as chamfered angles, and the angle of the chamfered angle may be 45 degrees, so that the size of the first predetermined edge width L1 and the size of the second predetermined edge width L2 may be the same, and the size of the third predetermined edge width L3 and the size of the fourth predetermined edge width L4 may be the same, but the present invention is not limited thereto. In other embodiments, the angle of the bevel may be between 4.76 degrees and 85 degrees, or the angle of the bevel may be between 30 degrees and 60 degrees, so that the first predetermined side width L1 and the second predetermined side width L2 may have different dimensions, and the third predetermined side width L3 and the fourth predetermined side width L4 may have different dimensions. Further, the dimensions of the first predetermined edge width L1 and the second predetermined edge width L2 may be smaller than the dimension of the predetermined width B, and the dimensions of the third predetermined edge width L3 and the fourth predetermined edge width may be smaller than the dimension of the predetermined width B. For example, the first predetermined edge width L1 may be between 5% and 60% of the predetermined width B, and the third predetermined edge width L3 may be between 5% and 60% of the predetermined width B. In addition, the second predetermined edge width L2 may be between 5% and 60% of the predetermined width B, and the fourth predetermined edge width L4 may be between 5% and 60% of the predetermined width B. However, the above examples are only one possible embodiment and are not intended to limit the present invention.
In light of the above, the third chamfer 222 may have a fifth predetermined edge width L5 and a sixth predetermined edge width L6, and the fourth chamfer 232 may have a seventh predetermined edge width L7 and an eighth predetermined edge width L8. The third chamfer 222 and the fourth chamfer 232 of the present invention are illustrated as chamfered angles, and the angle of the chamfered angles may be 45 degrees, so the size of the fifth predetermined edge width L5 and the size of the sixth predetermined edge width L6 may be the same, and the size of the seventh predetermined edge width L7 and the size of the eighth predetermined edge width L8 may be the same, but the present invention is not limited thereto. In other embodiments, the angle of the bevel may be between 0 and 90 degrees, or the angle of the bevel may be between 30 and 60 degrees, so that the size of the fifth predetermined edge width L5 and the size of the sixth predetermined edge width L6 may be different, and the size of the seventh predetermined edge width L7 and the size of the eighth predetermined edge width L8 may be different. Further, the dimensions of the fifth predetermined edge width L5 and the sixth predetermined edge width L6 may be less than the dimensions of the predetermined width B, and the dimensions of the seventh predetermined edge width L7 and the eighth predetermined edge width may be less than the dimensions of the predetermined width B. For example, the dimension of fifth predetermined edge width L5 may be less than 50% of the dimension of predetermined width B, and the dimension of seventh predetermined edge width L7 may be less than 50% of the dimension of predetermined width B. Further, the size of the sixth predetermined side width L6 may be less than 50% of the size of the predetermined width B, and the size of the eighth predetermined side width L8 may be less than 50% of the size of the predetermined width B. Still further, the dimension of the fifth predetermined edge width L5 may be less than 30% of the dimension of the predetermined width B, and the dimension of the seventh predetermined edge width L7 may be less than 30% of the dimension of the predetermined width B. Further, the size of the sixth predetermined side width L6 may be less than 30% of the size of the predetermined width B, and the size of the eighth predetermined side width L8 may be less than 30% of the size of the predetermined width B. However, the above examples are only one possible embodiment and are not intended to limit the present invention.
Next, referring to fig. 8, fig. 8 is a schematic perspective view of another embodiment of a current sensing structure according to a second embodiment of the present invention. As can be seen from a comparison between fig. 8 and fig. 5, in the embodiment of fig. 8, the current sensing structure 2 may further include: a barrier layer 25, the barrier layer 25 can be covered on the annular body portion 21, the first end portion 22 and the second end portion 23, and the material of the barrier layer 25 is a non-magnetic material or an insulating material. Thereby, oxidation, short circuit or electric shock of the annular body portion 21, the first end portion 22 and the second end portion 23 of the magnetic conductive material can be avoided. Furthermore, it should be noted that in other embodiments, when the current sensing element 3 of the foregoing embodiment is disposed in the slot 24 of the current sensing structure 2, the barrier layer 25 may also cover the current sensing element 3 at the same time to position the current sensing element 3 relative to the slot 24.
Next, please refer to fig. 9, wherein 9 is a front view of another current sensing structure according to a second embodiment of the present invention. As can be seen from a comparison between fig. 9 and fig. 6, in the embodiment of fig. 9, the current sensing structure 2 may only include the first chamfer 221 and the second chamfer 231, and the third chamfer 222 and the fourth chamfer 232 are not provided. It should be noted that the structural features of the first chamfer 221 and the second chamfer 231 in fig. 9 are similar to those of the previous embodiments, and are not repeated herein.
Next, referring to fig. 10, fig. 10 is a schematic perspective exploded view of a current sensing structure according to a further embodiment of the present invention. As can be seen from a comparison between fig. 10 and fig. 6, in the embodiment of fig. 6, the current sensing structure 2 can be manufactured in an integral manner, such as, but not limited to, using powder metallurgy press sintering, and in the embodiment of fig. 10, the current sensing structure 2 can be composed of a plurality of sheet structures 20, each sheet structure 20 is stacked in sequence to form the current sensing structure 2, and the shape of each sheet structure 20 is the same as each other. In addition, each of the sheet structures 20 may include a ring-shaped body portion 21, a first end portion 22, a second end portion 23, and a slot 24, and each of the sheet structures 20 is sequentially stacked along a central axis (not numbered) of the sensing space 210 to form the current sensing structure 2. Further, each of the sheet-like structures 20 may be a silicon steel sheet, and therefore, the sheet-like structures 20 may be manufactured by stamping and cutting, and since each of the sheet-like structures 20 is sequentially stacked along a central axis (not numbered) of the sensing space 210 to form the current sensing structure 2, the shape of each of the sheet-like structures 20 is the same, and thus, the assembly efficiency of the current sensing structure 2 can be increased. It should be noted that an adhesive (not shown) may be used between two adjacent sheet structures 20 to join the adjacent sheet structures 20 to form the current sensing structure 2.
Third embodiment
First, referring to fig. 11 and 12, fig. 11 is a perspective view of a current sensing structure according to a third embodiment of the present invention, and fig. 12 is a front view of the current sensing structure according to the third embodiment of the present invention. As can be seen from a comparison between fig. 11 and fig. 6, the greatest difference between the third embodiment and the first embodiment is that the current sensing structure 2 provided by the third embodiment may further include a first positioning structure 26 and a second positioning structure 27, the first positioning structure 26 may be disposed on the annular body portion 21, and the second positioning structure 27 may be disposed on the annular body portion 21 and corresponds to the first positioning structure 26.
In view of the above, the first positioning structure 26 and the second positioning structure 27 can be disposed on the annular outer surface 211 of the annular body 21, that is, the annular body 21 is a complete C-ring, and the first positioning structure 26 and the second positioning structure 27 are disposed outside the C-ring. In addition, the first positioning structure 26 and the second positioning structure 27 may also be utilized to dispose the current sensing structure 2 on the carrier board 1 in the foregoing embodiment, but the invention is not limited thereto. In addition, the first positioning structure 26 may include a first positioning body 261 connected to the annular body portion 21 and a first positioning portion 262 disposed on the first positioning body 261. The second positioning structure 27 may include a second positioning body 271 connected to the annular body 21 and a second positioning portion 272 disposed on the second positioning body 271.
Next, referring to fig. 13, fig. 13 is a schematic perspective exploded view of another current sensing structure according to a third embodiment of the present invention. As can be seen from a comparison between fig. 13 and fig. 11, in the embodiment of fig. 11, the current sensing structure 2 may be manufactured by, for example, but not limited to, an integral molding method using powder metallurgy press sintering, and in the embodiment of fig. 13, the current sensing structure 2 may be composed of a plurality of sheet structures 20, each sheet structure 20 is stacked in sequence to form the current sensing structure 2, and the shape of each sheet structure 20 is the same as each other. Further, each sheet structure 20 may include an annular body portion 21, a first end portion 22, a second end portion 23, a slot 24, a first locating structure 26, and a second locating structure 27, respectively. Furthermore, the first locating formation 26 of one of the two adjacent sheet formations 20 may abut against the first locating formation 26 of the other of the two adjacent sheet formations 20, and the second locating formation 27 of one of the two adjacent sheet formations 20 may abut against the second locating formation 27 of the other of the two adjacent sheet formations 20.
As mentioned above, for example, in the embodiment shown in fig. 13, the first positioning portion 262 of the first positioning structure 26 and the second positioning portion 272 of the second positioning structure 27 can be a rivet point. Therefore, the first positioning portion 262 and the second positioning portion 272 may be disposed in a protruding manner with respect to one surface of the current sensing structure 2, and the first positioning portion 262 and the second positioning portion 272 may be disposed in a recessed manner with respect to the other surface of the current sensing structure 2. Therefore, when two adjacent sheet structures 20 abut against each other, the first positioning portion 262 and the second positioning portion 272 of one sheet structure 20, which are disposed in a protruding manner, may abut against the first positioning portion 262 and the second positioning portion 272 of the other sheet structure 20, so that a plurality of sheet structures 20 can be sequentially stacked to form the current sensing structure 2. In other words, the first positioning structure 26 and the second positioning structure 27 have the effect of positioning the positional relationship between two adjacent sheet structures 20. It should be noted that, in addition to the first positioning structure 26 and the second positioning structure 27 being engaged with each other, an adhesive (not shown) may be used to join the adjacent sheet-like structures 20 to form the current sensing structure 2.
Next, referring to fig. 1 to 4 again, and referring to fig. 14 together, fig. 14 is a schematic diagram of a usage state of the current sensing module applied to the controller device according to the embodiment of the present invention. For example, the current sensing module U and the current sensing structure 2 thereof of the present invention are preferably applicable to a controller device E, such as but not limited to a driver of an electric vehicle. The controller device E may include a first conductive element C1, a second conductive element C2, a third conductive element C3, a fourth conductive element C4, and a fifth conductive element C5, wherein the first conductive element C1, the second conductive element C2, and the third conductive element C3 of the controller device E may be respectively connected to the motor, and the fourth conductive element C4 and the fifth conductive element C5 may be respectively used as the positive pole and the negative pole of the direct current. Therefore, when the first conductive element C1, the second conductive element C2, the third conductive element C3, the fourth conductive element C4 and the fifth conductive element C5 respectively pass through the through hole 10 of the carrier board 1 of the current sensing module U and the sensing space 210 of the current sensing structure 2, the current sensing module U can sense a current value flowing through the first conductive element C1, the second conductive element C2, the third conductive element C3, the fourth conductive element C4 and/or the fifth conductive element C5.
It should be noted that although the current sensing structure 2 in fig. 14 is illustrated as the current sensing structure 2 provided in fig. 6, in other embodiments, the current sensing structure 2 in other embodiments may be used. In addition, the structural features of the current sensing structure 2 in fig. 14 are similar to those of the previous embodiments, and are not repeated herein.
Advantageous effects of the embodiments
One of the advantages of the current sensing module U and the current sensing structure 2 thereof provided by the present invention is that the first end portion 22 is connected to one end of the annular body portion 21, and the first end portion 22 has a first chamfer 221 ", the second end portion 23 is connected to the other end of the annular body portion 21, and the second end portion 23 has a second chamfer 231", so as to improve the uniformity of the air gap magnetic flux density and improve the measurement range of the current value. In addition, through the technical characteristics, the saturation current of the current sensing structure 2 provided by the invention can be more than 800Arms, and the linearity error is less than 0.2%.
Furthermore, when the current sensing structure 2 is composed of a plurality of sheet structures 20, the convenience of the manufacturing process can be increased, and compared with the current sensing structure manufactured by powder metallurgy pressing and sintering in the prior art, the current sensing structure is not easy to crack.
Furthermore, compared with the prior art which uses nano amorphous material, the silicon steel sheet used in the invention has lower cost, and meanwhile, the technical effects of high linearity and high current measurement range can be achieved by using the first chamfer 221 and the second chamfer. In addition, the problem of easy embrittlement of the nano amorphous powder metallurgy process is solved.
Further, since the first positioning structure 26 and the second positioning structure 27 are provided outside the annular body portion 21, it is possible to avoid the problem of deterioration in the linearity of sensing due to an increase in stress and an increase in iron loss.
The disclosure is only a preferred embodiment of the invention, and is not intended to limit the scope of the claims, so that all technical equivalents and modifications using the contents of the specification and drawings are included in the scope of the claims.
Claims (10)
1. A current sensing structure, said current sensing structure comprising:
an annular body portion;
the first end part is connected with one end of the annular body part and is provided with a first chamfer;
The second end part is connected to the other end of the annular body part and is provided with a second chamfer; and
a slot located between the first end and the second end.
2. The current sensing structure of claim 1, wherein said annular body portion includes an annular outer surface and an annular inner surface corresponding to said annular outer surface, said first end portion includes a first end surface connected to said annular outer surface and said annular inner surface, said second end portion includes a second end surface connected to said annular outer surface and said annular inner surface; the first chamfer is located between the first end surface and the annular inner surface, a first connecting surface is arranged between the first end surface and the annular inner surface, the second chamfer is located between the second end surface and the annular inner surface, and the second end surface and the annular inner surface are provided with a second connecting surface.
3. The current sensing structure of claim 1, wherein said annular body portion has a predetermined outer diameter, a predetermined inner diameter, and a predetermined width, said first chamfer has a first predetermined edge width and a second predetermined edge width, said second chamfer has a third predetermined edge width and a fourth predetermined edge width; wherein the first predetermined edge width dimension is less than the predetermined width dimension and the third predetermined edge width dimension is less than the predetermined width dimension; wherein the first predetermined edge width dimension is less than 50% of the predetermined width dimension and the third predetermined edge width dimension is less than 50% of the predetermined width dimension; wherein the second predetermined edge width dimension is less than 50% of the predetermined width dimension and the fourth predetermined edge width dimension is less than 50% of the predetermined width dimension.
4. The current sensing structure of claim 1, wherein the current sensing structure is made of silicon steel.
5. The current sensing structure of claim 1, wherein the current sensing structure is composed of a plurality of sheet structures, each of the sheet structures being stacked in sequence to form the current sensing structure; wherein each of the sheet structures includes the annular body portion, the first end portion, the second end portion, and the slot.
6. The current sensing structure of claim 1, further comprising: and the barrier layer is covered on the annular body part, the first end part and the second end part, wherein the barrier layer is made of a non-magnetic material or an insulating material.
7. The current sensing structure of claim 1, further comprising: the first positioning structure is arranged on the annular body part, and the second positioning structure is arranged on the annular body part and corresponds to the first positioning structure; the first positioning structure comprises a first positioning body connected with the annular body part and a first positioning part arranged on the first positioning body; the second positioning structure comprises a second positioning body connected with the annular body part and a second positioning part arranged on the second positioning body.
8. The current sensing structure of claim 1, further comprising: the first positioning structure is arranged on the annular body part, and the second positioning structure is arranged on the annular body part and corresponds to the first positioning structure; the current sensing structure is composed of a plurality of sheet structures, and each sheet structure is stacked in sequence to form the current sensing structure; wherein each of the sheet structures includes the annular body portion, the first end portion, the second end portion, the slot, the first positioning structure, and the second positioning structure, respectively; wherein the first locating feature of one of the two adjacent sheet structures abuts against the first locating feature of the other of the two adjacent sheet structures, and the second locating feature of one of the two adjacent sheet structures abuts against the second locating feature of the other of the two adjacent sheet structures.
9. The current sensing structure of claim 1, wherein said first end further comprises a third chamfer and said second end further comprises a fourth chamfer; the third chamfer is positioned between the first end face and the annular outer surface, a third connecting face is arranged between the first end face and the annular outer surface, the fourth chamfer is positioned between the second end face and the annular outer surface, and the second end face and the annular outer surface are provided with a fourth connecting face.
10. A current sensing module, comprising:
a carrier plate;
the current sensing structure is arranged on the carrier plate and comprises an annular body part, a first end part, a second end part and a slot, wherein the first end part is connected to one end of the annular body part, a first chamfer is formed on the first end part, the second end part is connected to the other end of the annular body part, a second chamfer is formed on the second end part, and the slot is positioned between the first end part and the second end part; and
A current sensing element disposed on and coupled to the carrier plate, the current sensing element disposed in the slot.
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| CN201910433710.6A CN111983285A (en) | 2019-05-23 | 2019-05-23 | Current sensing module and current sensing structure thereof |
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