Hall current sensor

Abstract

The utility model relates to a Hall current sensor. The Hall current sensor comprises a magnetic core, a sheath and a Hall element, the magnetic core is annular and comprises at least two core bodies, and an air gap is formed between every two adjacent core bodies; the number of the sheaths is at least two, the sheaths and the air gaps are in one-to-one correspondence, each sheath comprises a sheath main body and two first limiting pieces arranged on the sheath main body, the sheath main body is arranged in the corresponding air gap, and the two first limiting pieces protrude out of the side, opposite to the two adjacent core bodies, of the sheath main body respectively; the two first limiting pieces on the same sleeve body abut against the inner side walls or the outer side walls of the parts, on the two sides of the air gap, of the core body correspondingly. And at least two Hall elements are arranged, the Hall elements are in one-to-one correspondence with the sheaths, and the Hall elements are arranged in the corresponding sheath main bodies. According to the Hall current sensor, two adjacent core bodies can be positioned, so that magnetic flux leakage is reduced, and the measurement accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sensors, in particular to a Hall current sensor. BACKGROUND

[0002] The Hall current sensor is a common device for measuring current, and some Hall current sensors have at least two magnetic cores with an air gap between adjacent two magnetic cores.

[0003] In the related art, the adjacent two magnetic cores are only connected by a copper foil tape. Since the copper foil tape is not rigid enough, the copper foil tape is prone to deformation during assembly, which causes misalignment of the adjacent two magnetic cores, resulting in serious magnetic leakage of the Hall current sensor and large measurement error. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a Hall current sensor which can position the adjacent two cores to reduce magnetic leakage and improve measurement accuracy.

[0005] A Hall current sensor comprises:

[0006] a magnetic core, the magnetic core is annular, and the magnetic core comprises at least two cores, and an air gap is arranged between adjacent two cores;

[0007] a sheath, the sheath is provided with at least two, the sheath corresponds to the air gap one by one, each sheath comprises a sheath body and two first limiters arranged on the sheath body, the sheath body is arranged in the corresponding air gap, and two first limiters protrude from the side of the sheath body opposite to the adjacent two cores; and the two first limiters in the same sheath abut against the inner side wall or the outer side wall of the core on the two sides of the corresponding air gap, respectively.

[0008] a Hall element, the Hall element is provided with at least two, the Hall element corresponds to the sheath one by one, and the Hall element is arranged in the corresponding sheath body.

[0009] In one embodiment, the two first limiters in the same sheath are integrally formed with the sheath body.

[0010] In one embodiment, the Hall current sensor further comprises a housing, the housing has a mounting groove, all the cores are mounted in the mounting groove, the sheath further comprises two second limiters arranged on the sheath body, the two second limiters are located at one end of the sheath body away from the groove bottom of the mounting groove, the two second limiters protrude from the side of the sheath body opposite to the adjacent two cores, and the two second limiters abut against the side of the adjacent two cores away from the groove bottom of the mounting groove, respectively.

[0011] In one of the embodiments, the first limiting member is arranged at one end of the sleeve body away from the bottom of the mounting groove, and in the same sheath, two first limiting members are connected with two second limiting members respectively.

[0012] In one of the embodiments, the circuit board is further included, and the sheath further includes a supporting component, at least one second limiting member in the same sheath is provided with the supporting component away from one side of the bottom of the mounting groove, and the supporting component at least partially protrudes from one side of the magnetic core away from the bottom of the mounting groove, and the circuit board is supported on one side of the magnetic core away from the bottom of the mounting groove through the supporting component, so that the circuit board has a gap with the magnetic core.

[0013] In one of the embodiments, the sleeve body is provided with a containing groove for containing the Hall element, two second limiting members are arranged on one side of the containing groove close to two adjacent core bodies respectively, the supporting component includes a first supporting protrusion and a second supporting protrusion for supporting the circuit board respectively, and the first supporting protrusion and the second supporting protrusion are arranged on two second limiting members respectively.

[0014] In one of the embodiments, the magnetic core includes two core bodies, one end of the circuit board is arranged on the outside of one of the core bodies, and the other end extends towards the other core body, the first supporting protrusion is arranged at one side of the second supporting protrusion away from the inside of the circuit board, the sheath further includes a positioning member arranged on the first supporting protrusion, the positioning member at least partially protrudes from one side of the first supporting protrusion away from the bottom of the mounting groove, and the positioning member is located on one side of the circuit board for positioning the circuit board.

[0015] In one of the embodiments, the positioning member is a cylinder.

[0016] In one of the embodiments, in the same sheath, two second supporting protrusions are arranged, and the two second supporting protrusions are distributed along the inner side wall of the core body towards the outer side wall.

[0017] In one of the embodiments, the sheath, the Hall element, the circuit board and each core body are fixed by potting glue.

[0018] The Hall current sensor, each sheath comprises a sleeve body and a first limiting piece, the Hall element is arranged in the corresponding sleeve body, and the sleeve body provides protection for the Hall element; two first limiting pieces are arranged on the same sleeve body, and the two first limiting pieces are respectively in abutment with the inner side wall or the outer side wall of the core body on the two sides of the air gap; during assembly, the two first limiting pieces on the sleeve body can be used to position the adjacent two core bodies, so that the adjacent two core bodies are aligned in the direction in which the inner side wall faces the outer side wall, the adjacent two core bodies are prevented from being misaligned in the direction in which the inner side wall faces the outer side wall, and the Hall current sensor is facilitated to reduce magnetic leakage and improve measurement accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A perspective view of a Hall current sensor of some embodiments of the present application.

[0020] Figure 2 A first angle structural view of a Hall current sensor of some embodiments of the present application after removing a shell and potting glue.

[0021] Figure 3 A second angle structural view of a Hall current sensor of some embodiments of the present application after removing a shell and potting glue.

[0022] Figure 4 A third angle structural view of a Hall current sensor of some embodiments of the present application after removing a shell, potting glue and a circuit board.

[0023] Figure 5 A fourth angle structural view of a Hall current sensor of some embodiments of the present application after removing a shell, potting glue and a circuit board.

[0024] Figure 6 A fifth angle structural view of a Hall current sensor of some embodiments of the present application after removing a shell and potting glue.

[0025] Figure 7 A perspective view of a sheath of some embodiments of the present application.

[0026] 1, sheath; 11, sleeve body; 111, accommodating groove; 12, first limiting piece; 13, second limiting piece; 14, supporting part; 141, first supporting protrusion; 1411, groove; 142, second supporting protrusion; 15, positioning piece; 2, Hall element; 3, magnetic core; 31, core body; 4, copper foil tape; 5, connector; 6, signal line; 7, potting glue; 8, amplifier; 9, shell; 10, circuit board; 100, air gap. DETAILED DESCRIPTION

[0027] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit and scope of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be understood that the use of the terms "include", "comprise" or "contain" herein should not be understood as limiting the present application to the features or steps described herein, but rather the use of these terms is intended to cover the presence of the features or steps described herein as well as the presence of other features or steps not described herein.

[0028] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0030] In the present application, unless otherwise specifically defined and limited, if the terms "mount", "connect", "connect", "fix" and the like appear, these terms should be interpreted broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise explicitly specified and limited, if there is a description such as "on" or "under" or similar description of the first feature to the second feature, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0032] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0033] Referring to Figure 1 , Figure 2 and Figure 5 , Figure 1 shows a perspective view of a Hall current sensor according to some embodiments of the present application, Figure 2 shows a first angle structural view of a Hall current sensor according to some embodiments of the present application after removing the shell and the potting glue, Figure 5 shows a fourth angle structural view of a Hall current sensor according to some embodiments of the present application after removing the shell, the potting glue and the circuit board. The Hall current sensor provided by an embodiment of the present application comprises a shell 9, a magnetic core 3, a sheath 1, a Hall element 2, a circuit board 10, an amplifier 8, a copper foil tape 4 and the shell 9. The amplifier 8 is arranged on the circuit board 10. One side of the shell 9 is recessed to form a mounting groove (not shown in the figure). In this embodiment, the top of the shell 9 is recessed to form a mounting groove, that is, the side of the shell 9 with the slot is the top. The sheath 1 is fixedly connected with the Hall element 2 and the core 31 through the potting glue 7 respectively. The circuit board 10 is fixedly connected with the sheath 1 and the core 31 through the potting glue 7 respectively. The Hall element 2, the circuit board 10, the amplifier 8 and the copper foil tape 4 are all potted in the mounting groove through the potting glue 7. The magnetic core 3 is annular. The magnetic core 3 comprises at least two cores 31. The adjacent two cores 31 have an air gap 100 therebetween. The copper foil tape 4 is wrapped outside all the cores 31 to connect and fix all the cores 31. The sheath 1 is provided with at least two, and the sheath 1 corresponds to the air gap 100 one by one. Referring to Figure 7 , Figure 7The perspective view of the sheath of some embodiments of the application is shown. Each sheath 1 comprises a sheath body 11 and two first limiters 12 arranged on the sheath body 11, the sheath body 11 is arranged in the corresponding air gap 100, and the two first limiters 12 respectively protrude from the side of the sheath body 11 opposite to the two adjacent core bodies 31. The two first limiters 12 in the same sheath respectively abut against the inner side wall or the outer side wall of the core body 31 on the two sides of the corresponding air gap 100. In actual implementation, in the same Hall current sensor, the two first limiters 12 in all sheaths 1 can be arranged to respectively abut against the inner side wall of the core body 31 on the two sides of the air gap 100 where the sheath 1 is located; in the same Hall current sensor, the two first limiters 12 in all sheaths 1 can also be arranged to respectively abut against the outer side wall of the core body 31 on the two sides of the air gap 100 where the sheath 1 is located; in the same Hall current sensor, the two first limiters 12 in a part of the sheaths 1 can be arranged to respectively abut against the inner side wall of the core body 31 on the two sides of the air gap 100 where the sheath 1 is located, and the two first limiters 12 in the remaining part of the sheaths 1 can be arranged to respectively abut against the outer side wall of the core body 31 on the two sides of the air gap 100 where the sheath 1 is located. The Hall element 2 is arranged at least two, the Hall element 2 corresponds to the sheath 1 one by one, and the Hall element 2 is arranged in the corresponding sheath body 11. The amplifier 8 and the Hall element 2 are respectively electrically connected with the circuit board 10, each core body 31 is electrically connected with the circuit board 10 through the signal line 6, the connector 5 is arranged on the circuit board 10, and when the Hall current sensor is connected with the external circuit, the power supply, signal transmission and grounding of the magnetic core 3 are realized through the connector 5.

[0034] In the Hall current sensor with such a structure, each sheath 1 comprises a sheath body 11 and a first limiter 12, the Hall element 2 is arranged in the corresponding sheath body 11 to provide protection for the Hall element 2 through the sheath body 11; two first limiters 12 are arranged on the same sheath body 11, and the two first limiters 12 respectively abut against the inner side wall or the outer side wall of the core body 31 on the two sides of the air gap 100 where the sheath body 11 is located, so that the two first limiters 12 on the sheath body 11 can be used to position the two adjacent core bodies 31 during assembly, so that the two adjacent core bodies 31 are aligned in the direction in which the inner side wall faces the outer side wall, and the dislocation of the two adjacent core bodies 31 in the direction in which the inner side wall faces the outer side wall is prevented, thereby facilitating the Hall current sensor to reduce magnetic leakage and improve measurement accuracy.

[0035] In some embodiments, referring to Figure 5 In the same sheath 1, the two first limiters 12 are integrally formed with the sheath body 11, and in this design, the two first limiters 12 and the sheath body 11 can be formed in the same mold during the processing of the sheath 1, thereby reducing the subsequent assembly process of the first limiter 12 and the sheath body 11, and facilitating the production of the sheath 1.

[0036] In some embodiments, referring toFigure 1 The Hall current sensor further comprises a housing 9, which has a mounting groove inside, and all the cores 31 are mounted in the mounting groove. Figure 2 、 Figure 3 、 Figure 4 and Figure 7 The sheath 1 further comprises two second limiters 13 arranged on the sleeve body 11, and the two second limiters 13 are located at the end of the sleeve body 11 away from the groove bottom of the mounting groove. The two second limiters 13 respectively protrude from the side of the sleeve body 11 opposite to the adjacent two cores 31, and the two second limiters 13 respectively abut against the side of the adjacent two cores 31 away from the groove bottom of the mounting groove. It should be noted that the groove bottom of the mounting groove refers to the side of the mounting groove opposite to the slot. During assembly, the two second limiters 13 are used to position the adjacent two cores 31, so that the side of the adjacent two cores 31 away from the groove bottom of the mounting groove is flush, further reducing magnetic leakage, thereby further improving the accuracy of the Hall current sensor measurement. In addition, the two second limiters 13 are arranged to abut against the side of the adjacent two cores 31 away from the groove bottom of the mounting groove, so that the core 31 is pressed against the bottom of the housing 9 by the second limiter 13, so that the core 31 is more fitted to the groove bottom of the mounting groove.

[0037] Referring to Figure 2 、 Figure 5 and Figure 7 The first limiter 12 is arranged at the end of the sleeve body 11 away from the groove bottom of the mounting groove, so that the first limiter 12 and the second limiter 13 are concentrated at the same end of the sleeve body 11, which is conducive to improving the compactness of the sheath 1. In the same sheath 1, the two first limiters 12 are connected with the two second limiters 13, which is conducive to enhancing the overall structural strength of the sheath 1.

[0038] In some embodiments, referring to Figure 4 、 Figure 5 and Figure 6 The sheath 1 further comprises a support component 14, and the support component 14 is arranged at the side of at least one second limiter 13 away from the groove bottom of the mounting groove in the same sheath 1, and the support component 14 at least partially protrudes from the side of the magnetic core 3 away from the groove bottom of the mounting groove. The circuit board 10 is supported on the side of the magnetic core 3 away from the groove bottom of the mounting groove through the support component 14, so that there is a gap between the circuit board 10 and the magnetic core 3. Referring to Figure 1It can be understood that the sheath 1, the circuit board 10, the amplifier 8 and the cores 31 are fixed by the pouring glue 7, the sheath 1 is connected with the Hall element 2, the core 31 and the circuit board 10 through the pouring glue 7, the circuit board 10 is connected with the core 31 through the pouring glue 7, the Hall element 2 is connected with the core 31 through the pouring glue 7, and the core 31 is connected with the shell 9 through the pouring glue 7. The support member 14 is arranged to support the circuit board 10 at the side of the magnetic core 3 away from the bottom of the mounting groove, so that the circuit board 10 has a gap with the magnetic core 3, and a space for accommodating the pouring glue 7 is formed between the circuit board 10 and the magnetic core 3 during packaging, so that the circuit board 10 is firmly combined with the magnetic core 3 under the action of the pouring glue 7.

[0039] In some embodiments, referring to Figure 2 and Figure 3 , the magnetic core 3 includes two identical cores 31, both of which are U-shaped structures, and the U-shaped openings of the two magnetic cores 3 are oppositely arranged, so that two air gaps 100 are formed between the two ends of the two cores 31, the sheath 1 and the Hall element 2 each have two, the sheath 1 corresponds to the air gap 100 one by one, and the sheath 1 is installed in the corresponding air gap 100, the Hall element 2 corresponds to the sheath 1 one by one, and the Hall element 2 is installed in the corresponding sheath 1, and the circuit board 10 is U-shaped. Referring to Figure 2 , Figure 3 , Figure 4 and Figure 7 , the sleeve body 11 is provided with a receiving groove 111 for accommodating the Hall element 2, two second limiting members 13 are arranged on one side of the receiving groove 111 close to the adjacent two cores 31, and the support member 14 includes a first support protrusion 141 and a second support protrusion 142, both of which are used to support the circuit board 10, and the first support protrusion 141 and the second support protrusion 142 are arranged on the two first limiting members 12 respectively. Since the two second limiting members 13 are arranged on one side of the receiving groove 111 close to the adjacent two cores 31, and the first support protrusion 141 and the second support protrusion 142 are arranged on the two first limiting members 12 respectively, the two second limiting members 13, the first support protrusion 141 and the second support protrusion 142 all avoid the slot opening of the receiving groove 111. This design, on the one hand, facilitates the installation of the Hall element 2 into the receiving groove 111, and on the other hand, the pins of the Hall element 2 can be connected to the circuit board 10, preventing the second limiting member 13 and the support member 14 from interfering with the pins of the Hall element 2.

[0040] Further, referring to Figure 2 , Figure 4 , Figure 5 and Figure 7The magnetic core 3 comprises two core bodies 31, one end of the circuit board 10 is arranged outside one of the core bodies 31, and the other end extends towards the other core body 31. The first supporting protrusion 141 is arranged on the side of the first supporting protrusion 141 away from the inside of the circuit board 10. The sheath 1 further comprises a positioning member 15 arranged on the first supporting protrusion 141. The positioning member 15 at least partially protrudes from the side of the first supporting protrusion 141 away from the bottom of the mounting groove. The positioning member 15 is arranged on one side of the circuit board 10 and used for positioning the circuit board 10. In the example, one end of the circuit board 10 away from the U-shaped opening is arranged outside one of the core bodies 31. The other end of the circuit board 10 with the U-shaped opening extends towards the other core body 31. The positioning member 15 is arranged close to the end of the U-shaped opening of the circuit board 10. During assembly, the end of the circuit board 10 with the U-shaped opening can be positioned by the positioning member 15, which is beneficial for the installation of the circuit board 10 and reduces the deviation of the installation position of the circuit board 10. In the embodiment, the inside of the circuit board 10 refers to the direction from one of the core bodies 31 towards the other core body 31, and the position of the circuit board 10 between the two opposite ends.

[0041] Referring to Figure 2 During the assembly of the circuit board 10, the end of the circuit board 10 with the U-shaped opening inevitably rubs against the side surface of the positioning member 15. The positioning member 15 is arranged in the form of a cylinder. The circumferential surface of the cylindrical positioning member 15 is smooth without sharp edges and corners. When the relative position of the circuit board 10 and the positioning member 15 is adjusted, the positioning member 15 is prevented from scratching the circuit board 10.

[0042] In some embodiments, referring to Figure 2 and Figure 5 In the same sheath 1, the second supporting protrusion 142 is arranged in two, and the two second supporting protrusions 142 are distributed along the inner side wall of the core body 31 towards the outer side wall. The circuit board 10 is supported by the two second supporting protrusions 142, which is beneficial for preventing the circuit board 10 from tilting. In addition, a space for filling the potting glue 7 can be reserved between the two second supporting protrusions 142, so that the circuit board 10 is tightly combined with the sheath 1 by the potting glue 7.

[0043] Referring to Figure 2 Figure 2 In order to increase the bonding strength of the sheath 1 and the magnetic core 3, the first supporting protrusion 141 is further provided with a groove 1411 on the side of the first supporting protrusion 141 relative to the magnetic core 3. During packaging, the groove 1411 can provide a space for accommodating the potting glue 7, so that the sheath 1 is firmly combined with the magnetic core 3 by the potting glue 7.

[0044] The technical features of the above embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present disclosure.

[0045] The above embodiments only express several implementation ways of the present application, and the description is specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A Hall current sensor, characterized by The application relates to a magnetic core and a shell thereof. The magnetic core comprises at least two core bodies, and adjacent two core bodies have an air gap therebetween. The shell is provided with at least two sheaths, and the sheaths correspond to the air gaps one by one. The sheaths are provided with at least two Hall elements, and the Hall elements correspond to the sheaths one by one.

2. The Hall current sensor according to claim 1, characterized in that The Hall elements are arranged in the corresponding sheaths.

3. The Hall current sensor of claim 1, wherein, The first limiting members in the same sheath are integrally formed with the sheath main body.

4. The Hall current sensor according to claim 3, characterized in that The shell further comprises a housing, and the housing has a mounting groove.

5. The Hall current sensor of claim 3, wherein, The core bodies are arranged in the mounting groove.

6. The Hall current sensor of claim 5, wherein, The sheaths further comprise two second limiting members arranged on the sheath main body.

7. The Hall current sensor according to claim 6, characterized in that The second limiting members are arranged at the end of the sheath main body away from the groove bottom of the mounting groove.

8. The Hall current sensor of claim 7, wherein, The second limiting members are arranged at the side of the sheath main body opposite to the adjacent two core bodies. The first limiting members are arranged at the end of the sheath main body away from the groove bottom of the mounting groove. The first limiting members in the same sheath are connected with the second limiting members. The sheaths further comprise a support component. The support component is arranged on the side of the second limiting member away from the groove bottom of the mounting groove. The support component at least partially protrudes from the side of the magnetic core away from the groove bottom of the mounting groove. The circuit board is supported on the side of the magnetic core away from the groove bottom of the mounting groove through the support component. The circuit board has a gap with the magnetic core. The sheath main body is provided with a containing groove for containing the Hall element. The second limiting members are arranged on the side of the containing groove close to the adjacent two core bodies. The support component comprises a first support protrusion and a second support protrusion for supporting the circuit board. The first support protrusion and the second support protrusion are arranged on the second limiting members. The magnetic core comprises two core bodies. One end of the circuit board is arranged on the outer side of one core body, and the other end extends towards the other core body. The first support protrusion is arranged on the side of the second support protrusion away from the inner side of the circuit board. The sheath further comprises a positioning member arranged on the first support protrusion. The positioning member at least partially protrudes from the side of the first support protrusion away from the groove bottom of the mounting groove. The positioning member is arranged on the side of the circuit board for positioning the circuit board. The positioning member is a cylinder.

9. The Hall current sensor of claim 7, wherein, In the same sheath, the second supporting convex parts are provided with two, and the two second supporting convex parts are distributed along the inner side wall of the core body to the direction of the outer side wall.

10. The Hall current sensor of claim 5, wherein, The sheath, the Hall element, the circuit board and each core body are fixed by pouring sealant.

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