Current sensor and electronic device

Abstract

The invention relates to a current sensor and an electronic device. A current sensor is provided with a bus bar and a magnetic sensor having at least two magnetoelectric conversion elements. The bus bar may have: a first conductive member and a second conductive member, which are disposed so as to face each other with the magnetic sensor therebetween, and which extend in a first direction; and a connection member disposed between the first conductive member and the second conductive member and connecting the first conductive member and the second conductive member. It is also possible that the magnetic sensor does not overlap the first conductive member, the second conductive member, and the connection member when viewed from the magnetosensitive surface side of the at least two magnetoelectric conversion elements. The magnetosensitive surface may not overlap with the first conductive member and the second conductive member when viewed from a second direction, where a direction extending along the magnetosensitive surface and intersecting the first direction is defined as the second direction, and the magnetosensitive surface may not overlap with the first conductive member and the second conductive member when viewed from the second direction.

Description

Technical Field

[0001] The present invention relates to a current sensor and an electronic device. Background Art

[0002] Patent Documents 1 and 2 describe placing a magnetic sensor on a busbar having two flow paths of equal height in the thickness direction. Patent Documents 3 and 4 describe placing a magnetic sensor between two flow paths in a busbar having two flow paths of different heights in the thickness direction so as to overlap the two flow paths when viewed in plan. Patent Document 5 describes placing a magnetic sensor between two flow paths in a busbar having two flow paths of different heights in the thickness direction so as to overlap the two flow paths when viewed in plan, or placing two independent busbars at different heights in the thickness direction.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: International Publication No. 2023 / 038725

[0006] Patent Document 2: U.S. Patent Application Publication No. 2023 / 0204632

[0007] Patent Document 3: Japanese Patent Application Laid-Open No. 2021-36199

[0008] Patent Document 4: U.S. Patent Application Publication No. 2020 / 0300894

[0009] Patent Document 5: International Publication No. 2017 / 010219 Summary of the Invention

[0010] Problems to be solved by the invention

[0011] It is desirable to suppress detection errors caused by positional deviations in the thickness direction of the magnetic sensor and to improve the ease of mounting the magnetic sensor on an electronic module or the like.

[0012] Means for solving problems

[0013] A current sensor according to one embodiment of the present invention may include: a busbar through which a measurement current flows; and a magnetic sensor having at least two magnetoelectric transducers that detect a magnetic field generated by the measurement current flowing through the busbar. The busbar may include a first conductive member and a second conductive member, which are arranged opposite each other with the magnetic sensor interposed therebetween and extend in a first direction. The busbar may include a connecting member, which is arranged between the first and second conductive members and connects the first and second conductive members. When viewed from the magnetically sensitive surfaces of the at least two magnetoelectric transducers, the magnetic sensor may not overlap with the first and second conductive members, or the connecting member. When viewed from a second direction, which is a direction along the magnetically sensitive surface and intersecting the first direction, the magnetically sensitive surface may not overlap with the first and second conductive members and may be arranged between at least a portion of the first conductive member and at least a portion of the second conductive member.

[0014] In the current sensor, the first conductive member may include: a first flow path portion and a second flow path portion, each extending in the first direction at a distance from each other and through which the measurement current flows; and a first connecting portion and a second connecting portion, each disposed at a distance from each other and connecting the first flow path portion to the second flow path portion. Alternatively, the second conductive member may include: a third flow path portion and a fourth flow path portion, each extending in the first direction at a distance from each other and through which the measurement current flows; and a third connecting portion and a fourth connecting portion, each disposed at a distance from each other and connecting the third flow path portion to the fourth flow path portion. Alternatively, when viewed from the second direction, the magnetically sensitive surface may be disposed between the first flow path portion and the second flow path portion and between the first connecting portion and the second connecting portion, and between the third flow path portion and the fourth flow path portion and between the third connecting portion and the fourth connecting portion.

[0015] In any of the current sensors, the magnetic sensor may not overlap with the first conductive member and the second conductive member when viewed from the second direction.

[0016] In any of the above current sensors, the magnetically sensitive surface may be arranged between the first conductive member and the second conductive member when viewed from the second direction.

[0017] In any of the above current sensors, the at least two magnetoelectric conversion elements may be longitudinal magnetic field detection type elements.

[0018] An electronic device according to one embodiment of the present invention may include the current sensor. The electronic device may include an electronic module having an output terminal. The electronic device may include a substrate disposed at a predetermined position on a first surface of the electronic module. The bus bar may be fixed to the output terminal. The magnetic sensor may be disposed on the substrate.

[0019] In the electronic device, the substrate may have a protrusion protruding from an edge portion, and the magnetic sensor may be disposed on the protrusion.

[0020] In any of the electronic devices, the protrusion may not overlap with the first conductive member and the second conductive member when viewed from the magnetic sensitive surface side of the at least two magnetoelectric conversion elements.

[0021] In any of the electronic devices, the protrusion may be arranged between the first conductive member and the second conductive member.

[0022] In any of the electronic devices, the first conductive member may include: a first flow path portion and a second flow path portion, each extending in a first direction at a distance from each other and through which the measurement current flows; and a first connecting portion and a second connecting portion, each disposed at a distance from each other and connecting the first flow path portion and the second flow path portion. Alternatively, the second conductive member may include: a third flow path portion and a fourth flow path portion, each extending in the first direction at a distance from each other and through which the measurement current flows; and a third connecting portion and a fourth connecting portion, each disposed at a distance from each other and connecting the third flow path portion and the fourth flow path portion. The connecting member may connect the first connecting portion and the third connecting portion. The bus bar may include a first terminal connecting member, coupled to the first conductive member and projecting from the second connecting portion toward the fourth connecting portion. The bus bar may include a first terminal connecting member, coupled to the first conductive member and projecting from the second connecting portion toward the fourth connecting portion. The first and second terminal connecting members may be fixed to the output terminals. When viewed from a second direction along the magnetically sensitive surface and intersecting the first direction, the magnetically sensitive surface can be arranged between the first flow path portion and the second flow path portion and between the first connecting portion and the second connecting portion, and between the third flow path portion and the fourth flow path portion and between the third connecting portion and the fourth connecting portion.

[0023] In any of the electronic devices, the electronic module may include a plurality of the output terminals. The substrate may include a plurality of protrusions protruding from the edge and spaced apart from each other. The current sensor may include a plurality of the bus bars and a plurality of the magnetic sensors. The plurality of magnetic sensors may be disposed on each of the protrusions.

[0024] In any of the electronic devices, the electronic module may be a power module.

[0025] An electrical device according to one embodiment of the present invention may include: a current sensor; an electronic module having an output terminal; and a substrate disposed at a predetermined position on a first surface of the electronic module. The current sensor may include: a busbar through which a measurement current flows; and a magnetic sensor having at least two magnetoelectric transducers that detect a magnetic field generated by the measurement current flowing through the busbar. The busbar may include: a first conductive member and a second conductive member disposed opposite each other, extending in a first direction with the magnetic sensor interposed therebetween; and a connecting member disposed between the first and second conductive members to connect the first and second conductive members. The magnetic sensor may not overlap with the first and second conductive members, or the connecting member, when viewed from the magnetically sensitive surfaces of the at least two magnetoelectric transducers. Alternatively, when viewed from a second direction extending along the magnetically sensitive surface and intersecting the first direction, the magnetically sensitive surface may not overlap with the first and second conductive members, but may be disposed between at least a portion of the first conductive member and at least a portion of the second conductive member. The bus bar may be fixed to the output terminal. The magnetic sensor may be arranged on the substrate. The substrate may have a protrusion protruding from an edge. The magnetic sensor may be arranged on the protrusion.

[0026] It should be noted that the above summary of the invention does not list all the features of the present invention. In addition, sub-combinations of these feature groups can also constitute inventions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a diagram showing an example of a perspective view of the electronic device according to this embodiment.

[0028] Figure 2 This is a plan view of the electronic device as viewed from the substrate side.

[0029] Figure 3 This is a side view of the electronic device when viewed from the side of the bus bar.

[0030] Figure 4 This is a perspective view of a bus bar.

[0031] Figure 5 is a side view of the busbar.

[0032] Figure 6 This is a top view of the busbar.

[0033] Figure 7 This is a plan view of an electronic device according to a comparative example as viewed from the power module side.

[0034] Figure 8 1 is a diagram illustrating the positional relationship between a bus bar and a magnetic sensor in an electronic device according to a comparative example.

[0035] Figure 9 1 is a diagram showing the positional relationship between the bus bar and the magnetic sensor in the electronic device according to the present embodiment.

[0036] Figure 10 This is a plan view of a metal plate serving as a raw material for the bus bar.

[0037] Figure 11 This is a plan view of a metal plate before being bent to form a bus bar.

[0038] Figure 12 This is a top view of the bent metal plate, that is, the bus bar.

[0039] Figure 13 This is a perspective view of a bus bar according to a modified example.

[0040] Description of Reference Numerals

[0041] 10, 10A electronic devices

[0042] 10A electronic devices

[0043] 11Magnetoelectric conversion element

[0044] 11a Magnetic sensitive surface

[0045] 12, 12A magnetic sensor

[0046] 20 substrates

[0047] 21 Edge

[0048] 22 protrusion

[0049] 30 power modules

[0050] 32 output terminals

[0051] 100, 100A busbar

[0052] 101A, 102A flow path

[0053] 101 first conductive member

[0054] 110 second conductive member

[0055] 102 First flow path department

[0056] 103 first connecting part

[0057] 104 second flow path portion

[0058] 105 second connecting portion

[0059] 106 third flow path

[0060] 107 Third connecting part

[0061] 108 fourth flow path

[0062] 109 Fourth connecting part

[0063] 112 connecting components

[0064] 114 first terminal connecting member

[0065] 116 second terminal connecting member

[0066] 300 metal plates

[0067] 301 Main Body

[0068] Extensions 302 and 304. DETAILED DESCRIPTION

[0069] The present invention will be described below by way of embodiments of the invention, but the following embodiments do not limit the invention as defined in the claims. Furthermore, the combination of features described in the embodiments is not necessarily essential for the solution provided by the invention.

[0070] Figure 1 An example of a perspective view of the electronic device 10 according to the present embodiment is shown. The electronic device 10 includes a magnetic sensor 12 , a bus bar 100 , a power module 30 , and a substrate 20 . Figure 2 This is a plan view of the electronic device 10 as viewed from the substrate 20 side. Figure 3 This is a side view of the electronic device 10 as viewed from the side surface of the bus bar 100 .

[0071] The power module 30 has a plurality of output terminals 32. The plurality of output terminals 32 are arranged at intervals along one side of the power module 30. The power module 30 is a power converter that converts DC to AC. The power module 30 converts DC to three-phase AC. It should be noted that the number and position of the output terminals 32 of the power module 30 are not limited to Figure 1 The form shown.

[0072] The substrate 20 is disposed on the mounting surface of the power module 30. The mounting surface is an example of a first surface. The substrate 20 has a plurality of protrusions 22 protruding from the edge 21. The plurality of protrusions 22 are disposed at positions facing the output terminals 32.

[0073] Multiple magnetic sensors 12 are arranged on the multiple protrusions 22. Each magnetic sensor 12 includes two magnetoelectric transducers that detect the magnetic field generated by the measurement current flowing through the busbar 100. The two magnetoelectric transducers have built-in magnetically sensitive surfaces. The magnetic sensor 12 may also include three or more magnetoelectric transducers. The magnetoelectric transducers may be longitudinal magnetic field detection elements, such as Hall elements. In this embodiment, the multiple magnetic sensors 12 are arranged on the surface of the multiple protrusions 22 opposite the surface on which the power module 30 is mounted. However, as long as the positional relationship between the busbar 100 and the magnetic sensors 12 satisfies the relationship described below, the multiple magnetic sensors 12 may also be arranged on the surface of the multiple protrusions 22 on the same side as the surface on which the power module 30 is mounted. The multiple magnetic sensors 12 may be arranged on any surface of each of the multiple protrusions 22. In other words, when the magnetic sensor 12 is arranged on any surface of the protrusion 22, it means that the magnetic sensor 12 is arranged on the protrusion 22.

[0074] The plurality of bus bars 100 are respectively fixed to the plurality of output terminals 32. The bus bars 100 may be welded to the output terminals 32.

[0075] The magnetic sensor 12 detects the magnetic field generated by the measurement current flowing through the busbar 100 and outputs a signal corresponding to the magnitude of the magnetic field as a signal representing the current value of the measurement current flowing through the busbar 100. In other words, the busbar 100 and the magnetic sensor 12 constitute a current sensor. In this embodiment, an example is described in which the substrate 20 is disposed on the mounting surface of the power module 30. However, as long as the positional relationship between the busbar 100 and the magnetic sensor 12 satisfies the relationship described below, the busbar 100 may also be disposed on the surface of the substrate 20 on which multiple magnetic sensors 12 are disposed.

[0076] The multiple protrusions 22 on the substrate 20 are preferably arranged so as not to contact the bus bar 100. This facilitates ensuring insulation between the bus bar 100 and the magnetic sensors 12. When the multiple protrusions 22 on the substrate 20 carrying the bus bar 100 and the multiple magnetic sensors 12 are arranged so as not to contact the bus bar 100, the substrate 20 and the bus bar 100 can be positioned by being fixed to the power module 30.

[0077] Figure 4 It is a perspective view of the bus bar 100 . Figure 5 1 is a side view of the bus bar 100 . Figure 6 1 is a top view of the bus bar 100 . Figures 4 to 6 The positional relationship between the bus bar 100 and the magnetic sensor 12 is also shown.

[0078] Busbar 100 includes a first conductive member 101 and a second conductive member 110 extending in a first direction (y-axis direction) and spaced apart from each other. Busbar 100 also includes a connecting member 112 disposed between first and second conductive members 101, 110 to connect the first and second conductive members 101, 110. Busbar 100 can be made of a conductive material primarily composed of copper.

[0079] The first conductive member 101 includes a first flow path 102 and a second flow path 104 through which the measurement current flows. The first flow path 102 and the second flow path 104 extend in a first direction at a distance from each other. The first conductive member 101 also includes a first connecting portion 103 and a second connecting portion 105, which are arranged at a distance from each other and connect the first flow path 102 and the second flow path 104. The first connecting portion 103 and the second connecting portion 105 can connect the ends of the first flow path 102 and the second flow path 104, respectively.

[0080] The second conductive member 110 includes a third flow path portion 106 and a fourth flow path portion 108 through which the measurement current flows. The third flow path portion 106 and the fourth flow path portion 108 extend in the first direction at intervals from each other. The second conductive member 110 also includes a third connecting portion 107 and a fourth connecting portion 109 that are arranged at intervals from each other and connect the third flow path portion 106 and the fourth flow path portion 108. The third connecting portion 107 and the fourth connecting portion 109 can connect the ends of the third flow path portion 106 and the fourth flow path portion 108, respectively. The first connecting portion 103 and the third connecting portion 107 can be arranged opposite to each other in a second direction (x-axis direction) that intersects the first direction (y-axis direction), and the second connecting portion 105 and the fourth connecting portion 109 can be arranged opposite to each other in the second direction (x-axis direction).

[0081] The bus bar 100 includes a first terminal connecting member 114 coupled to the first conductive member 101 and projecting from the second connecting portion 105 toward the fourth connecting portion 109. The bus bar 100 includes a second terminal connecting member 116 coupled to the second conductive member 110 and projecting from the fourth connecting portion 109 toward the second connecting portion 105. The first and second terminal connecting members 114 and 116 can be fixed to the output terminals 32 by welding or the like.

[0082] When viewed from the magnetically sensitive surface 11a side (the positive side in the z-axis direction) of the magnetoelectric transducer 11, the magnetic sensor 12 does not overlap with the first conductive member 101, the second conductive member 110, and the connecting member 112. When viewed from the magnetically sensitive surface 11a side (the positive side in the z-axis direction) of the magnetoelectric transducer 11, the magnetic sensor 12 may not overlap with the first terminal connecting member 114 and the second terminal connecting member 116. Furthermore, when viewed from a second direction (the x-axis direction) that extends along the magnetically sensitive surface 11a and intersects the first direction (the y-axis direction), the magnetically sensitive surface 11a of the magnetoelectric transducer 11 does not overlap with the first conductive member 101 and the second conductive member 110, and is positioned between at least a portion of the first conductive member 101 and at least a portion of the second conductive member 110. When viewed from the second direction, the magnetically sensitive surface 11 a may be arranged between the first flow path portion 102 and the second flow path portion 104 and between the first connecting portion 103 and the second connecting portion 105 , and between the third flow path portion 106 and the fourth flow path portion 108 and between the third connecting portion 107 and the fourth connecting portion 109 .

[0083] When viewed from the second direction, the magnetic sensor 12 may not overlap with the first conductive member 101 and the second conductive member 110. The magnetic sensor 12 may be disposed between the first flow path 102 and the second flow path 104 and between the first connecting portion 103 and the second connecting portion 105, and between the third flow path 106 and the fourth flow path 108 and between the third connecting portion 107 and the fourth connecting portion 109.

[0084] Figure 7 This is a plan view of the electronic device 10A according to the comparative example as viewed from the side of the power module 30. The magnetic sensor 12A is arranged in the opening 120A included in the bus bar 100A.

[0085] In the case of such a structure, Figure 8 As shown in FIG. 1 , the magnetic sensor 12A is located between the two current paths 101A and 102A. That is, when viewed from the second direction, the magnetic sensor 12A overlaps the first conductive member 101 and the second conductive member 110. The magnetic sensor 12A located in such a position detects the current according to the so-called right-hand spiral law. Figure 8 Magnetic field in the direction shown. If magnetic sensor 12A is positioned in such a position and its position is offset in a direction perpendicular to the magnetic sensitive surface, the magnitude of the magnetic field detected by the magnetoelectric converter included in magnetic sensor 12A is likely to be offset. In other words, the measured value corresponding to the magnitude of the magnetic field measured by magnetic sensor 12A is likely to be erroneous due to the positional offset of magnetic sensor 12A in the direction perpendicular to the magnetic sensitive surface.

[0086] On the other hand, according to the structure of the electronic device 10 of this embodiment, as shown in FIG. Figure 9As shown, magnetic sensor 12 is located between current flow paths with varying heights perpendicular to the magnetic sensitive surface. More specifically, magnetic sensor 12 is surrounded by four flow paths: first flow path portion 102, second flow path portion 104, third flow path portion 106, and fourth flow path portion 108. This arrangement of current flow paths with varying heights perpendicular to the magnetic sensitive surface makes it difficult for the magnitude of the magnetic field detected by the magnetoelectric converter element of magnetic sensor 12 to shift even if the magnetic sensor 12 is displaced perpendicular to the magnetic sensitive surface. Consequently, the measured value corresponding to the magnitude of the magnetic field measured by magnetic sensor 12 is less likely to be affected by any deviation in the position of magnetic sensor 12 perpendicular to the magnetic sensitive surface.

[0087] For example, when magnetic sensor 12A according to the comparative example is offset by 0.1 mm in the direction perpendicular to the magnetic sensitive surface, simulation results show that the current value measured by magnetic sensor 12A exhibits an error of 2% or more. On the other hand, when magnetic sensor 12 according to the present embodiment is offset by 0.1 mm in the direction perpendicular to the magnetic sensitive surface, simulation results show that the current value measured by magnetic sensor 12 converges to an error of 0.5% or less.

[0088] Furthermore, the magnetic sensor 12 is provided on a protrusion 22 provided on the edge 21 of the substrate 20. When viewed from the magnetically sensitive surface 11a of the magnetoelectric transducer 11, the protrusion 22 and the magnetic sensor 12 do not overlap with the first conductive member 101, the second conductive member 110, and the connecting member 112. When viewed from the magnetically sensitive surface 11a of the magnetoelectric transducer 11, the protrusion 22 and the magnetic sensor 12 are located between the first conductive member 101 and the second conductive member 110.

[0089] With this configuration, while the bus bar 100 is fixed to the output terminal 32 of the power module 30, the substrate 20 with the magnetic sensor 12 mounted on the protrusion 22 is moved from above the mounting surface of the power module 30 in a direction perpendicular to the mounting surface (z-axis direction), thereby allowing the substrate 20 to be positioned on the mounting surface of the power module 30. Positioning between the power module 30 and the substrate 20 can be achieved, for example, using press-fit pins.

[0090] The bus bar 100 can be fixed to the output terminal 32 of the power module 30 by welding, and the magnetic sensor 12 can be fixed to the substrate 20 by welding. Therefore, the power module 30 and the substrate 20 are positioned with high precision in a predetermined positional relationship using press-fit pins or the like, and the magnetic sensor 12 and the bus bar 100 are also positioned with high precision.

[0091] Next, a method for manufacturing the bus bar 100 will be described.

[0092] Figure 10The metal plate 300 is the raw material of the busbar 100. The metal plate 300 has a main portion 301, an extended portion 302, and an extended portion 304. The extended portion 302 and the extended portion 304 extend along the short side of the main portion 301 on both sides of one end in the long side direction. The metal plate 300 has a T-shape when viewed from above.

[0093] like Figure 11 As shown, the metal plate 300 is subjected to a punching process. That is, the main body 301 is cut from the center of one end of the main body 301 in the longitudinal direction toward the other end of the main body 301 in the longitudinal direction to form a groove 310, and the main body 301 is in a U shape. An opening 306 and an opening 308 along the longitudinal direction are formed in the first part 305 and the second part 307 of the main body 301 opposite to each other across the groove 310. Figure 11 The dotted lines shown are folds that bend the metal plate 300 inwards, so that Figure 12 As shown, a bus bar 100 is formed.

[0094] In the above embodiment, an example is described in which the magnetic sensor of the bus bar 100 is surrounded by four flow paths. However, the bus bar 100 may have only two flow paths located on the diagonal line among the first flow path portion 102, the second flow path portion 104, the third flow path portion 106, and the fourth flow path portion 108. That is, Figure 13 As shown, the bus bar 100 may include the first flow path portion 102 and the fourth flow path portion 108 instead of the second flow path portion 104 and the third flow path portion 106. Alternatively, the bus bar 100 may include the second flow path portion 104 and the third flow path portion 106 instead of the first flow path portion 102 and the fourth flow path portion 108.

[0095] As described above, according to the electronic device 10 of the present embodiment, it is possible to suppress detection errors caused by positional deviations in the thickness direction of the magnetic sensor 12 and improve the ease of mounting the magnetic sensor 12 on the power module 30 .

[0096] While the present invention has been described above using embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It is apparent to those skilled in the art that various modifications or improvements can be made to the above embodiments. As can be seen from the claims, embodiments incorporating such modifications or improvements are also within the technical scope of the present invention.

[0097] It should be noted that the order in which actions, processes, steps, and stages, etc., of the apparatus, system, program, and method described in the claims, specifications, and drawings may be performed in any order, unless otherwise expressly indicated as "before," "before," or the like, and unless the output of a previous process is used in a subsequent process. Even if the action flow in the claims, specifications, and drawings is described using the phrases "first," "next," or the like for convenience, it does not necessarily mean that the actions must be performed in that order.

Claims

1. A current sensor, wherein: have: a bus bar through which the measuring current flows; and a magnetic sensor having at least two magnetoelectric conversion elements for detecting a magnetic field generated by a measurement current flowing through the bus bar, The bus bar has: A first conductive member and a second conductive member are arranged opposite to each other with the magnetic sensor interposed therebetween, and extend in a first direction; as well as a connecting member disposed between the first conductive member and the second conductive member to connect the first conductive member and the second conductive member; When viewed from the magnetically sensitive surface side of the at least two magnetoelectric conversion elements, the magnetic sensor does not overlap with the first conductive member, the second conductive member, and the connecting member. A direction along the magnetically sensitive surface and intersecting the first direction is set as a second direction, When viewed from the second direction, the magnetically sensitive surface does not overlap with the first conductive member and the second conductive member, and is arranged between at least a portion of the first conductive member and at least a portion of the second conductive member.

2. The current sensor according to claim 1, wherein The first conductive member includes: a first flow path portion and a second flow path portion, which extend in a first direction at a distance from each other and through which the measurement current flows; and a first connecting portion and a second connecting portion, which are arranged at a distance from each other and connect the first flow path portion and the second flow path portion, respectively. The second conductive member includes: a third flow path portion and a fourth flow path portion, which extend in the first direction at a distance from each other and through which the measurement current flows; and a third connecting portion and a fourth connecting portion, which are arranged at a distance from each other and connect the third flow path portion and the fourth flow path portion, respectively. When viewed from the second direction, the magnetically sensitive surface is arranged between the first flow path portion and the second flow path portion and between the first connecting portion and the second connecting portion, and between the third flow path portion and the fourth flow path portion and between the third connecting portion and the fourth connecting portion.

3. The current sensor according to claim 1, wherein When viewed from the second direction, the magnetic sensor does not overlap with the first conductive member and the second conductive member.

4. The current sensor according to claim 1, wherein When viewed from the second direction, the magnetically sensitive surface is arranged between the first conductive member and the second conductive member.

5. The current sensor according to claim 1, wherein The at least two magnetoelectric conversion elements are longitudinal magnetic field detection type elements.

6. An electronic device, wherein: have: The current sensor according to any one of claims 1 to 5; an electronic module having output terminals; and a substrate, arranged at a predetermined position on the first surface of the electronic module, The bus bar is fixed to the output terminal, The magnetic sensor is configured on the substrate.

7. The electronic device according to claim 6, wherein The substrate has a protrusion protruding from the edge. The magnetic sensor is disposed on the protrusion.

8. The electronic device according to claim 7, wherein When viewed from the magnetically sensitive surface side of the at least two magnetoelectric conversion elements, the protrusion does not overlap with the first conductive member and the second conductive member.

9. The electronic device according to claim 7, wherein The protrusion is arranged between the first conductive member and the second conductive member.

10. The electronic device according to claim 6, wherein The first conductive member includes: a first flow path portion and a second flow path portion, which extend in a first direction at a distance from each other and through which the measurement current flows; and a first connecting portion and a second connecting portion, which are arranged at a distance from each other and connect the first flow path portion and the second flow path portion. The second conductive member includes: a third flow path portion and a fourth flow path portion, which extend in the first direction at a distance from each other and through which the measurement current flows; and a third connecting portion and a fourth connecting portion, which are arranged at a distance from each other and connect the third flow path portion and the fourth flow path portion. The connecting member connects the first connecting portion and the third connecting portion. The bus bar also has: a first terminal connecting member connected to the first conductive member and protruding from the second connecting portion toward the fourth connecting portion; and a second terminal connecting member connected to the second conductive member and protruding from the fourth connecting portion toward the second connecting portion; The first terminal connecting member and the second terminal connecting member are fixed to the output terminal, When viewed from a second direction along the magnetically sensitive surface and intersecting the first direction, the magnetically sensitive surface is arranged between the first flow path portion and the second flow path portion and between the first connecting portion and the second connecting portion, and is arranged between the third flow path portion and the fourth flow path portion and between the third connecting portion and the fourth connecting portion.

11. The electronic device according to claim 7, wherein The electronic module includes a plurality of output terminals. The substrate has a plurality of protrusions protruding from the edge and arranged at intervals from each other. The current sensor includes a plurality of the bus bars and a plurality of the magnetic sensors. The plurality of magnetic sensors are respectively disposed on the plurality of protrusions.

12. The electronic device according to claim 11, wherein The electronic module is a power module.

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