JP2016197052A - Current sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique, pertaining to a current sensor for measuring a current flowing in each of a plurality of bus bars having a projection, that suppresses the effect of a noise magnetic field caused by the projection of an adjacent bus bar.SOLUTION: A current sensor disclosed by the present specification comprises two bus bars 2a, 2b arranged in parallel, and magnetoelectric transducers 7a, 7b. Notches 21a, 21b and projections 23a, 23b are provided in each of the bus bars 2a, 2b. The magnetoelectric transducers 7a, 7b are arranged inside each of the notches 21a, 21b. The notch 21a of the bus bar 2a is arranged in the direction of bus bar extension so that it does not overlap the notch 21b of the adjacent bus bar 2b. The projection 23a of the bus bar 2a, when viewed from the direction of bus bar arrangement, is arranged between the magnetoelectric transducers 7a, 7b, and provided in the direction of extension at a position where it does not overlap the magnetoelectric transducers 7a, 7b.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a current sensor. In particular, the present invention relates to a current sensor that measures a current flowing through each of a plurality of bus bars.

  A current sensor that measures current may be required. For example, in order to control a motor of an electric vehicle, a current sensor is attached to a bus bar that transmits power to the motor. In order to control the motor with high accuracy, it is desired to improve the measurement accuracy of the current sensor.

  In the current sensor, as an element used for measuring a current, for example, there is a magnetoelectric conversion element. The magnetoelectric conversion element is an element that senses a magnetic flux generated due to a current flowing through the bus bar. The magnetoelectric conversion element is affected by a magnetic field generated from other than the current measurement target bus bar. For example, when a plurality of bus bars are arranged in parallel and the current of each bus bar is measured, the magnetoelectric conversion element is affected by a magnetic field generated from a non-measurement bus bar adjacent to the measurement target bus bar. For example, Patent Document 1 discloses a technique for improving the measurement accuracy of a current sensor while suppressing the influence of such a magnetic field. This technique suppresses the influence of a magnetic field generated from an adjacent bus bar by devising the shape of the bus bar and the layout of the bus bar and the magnetoelectric transducer.

JP 2001-074783 A

  In order to improve the measurement accuracy of a current sensor having a magnetoelectric conversion element, it is also effective to accurately determine the relative position between a bus bar to be measured and a bus bar that is not to be measured, in addition to noise countermeasures as shown in Patent Document 1. is there. For example, when a plurality of bus bars are fixed to a mold and the plurality of bus bars are molded with resin, it may be necessary to provide each bus bar with a protrusion for positioning with respect to the mold. In a current sensor using a bus bar having such a protrusion, attention must also be paid to a magnetic field generated due to a current flowing through the protrusion. In other words, the magnetic field generated from the protrusion of the bus bar that is not the object of measurement may greatly affect the magnetoelectric transducer. If the protrusion is provided at a position away from the magnetoelectric conversion element in the bus bar extending direction, it is not necessary to consider the influence of the protrusion, but near the bus bar portion to be molded with resin, that is, where the magnetoelectric conversion element is arranged. It is desirable to provide a protrusion in the vicinity. This is because the mold can be miniaturized and the entire current sensor including the protrusions can be miniaturized. The present specification relates to a current sensor that measures a current flowing through each of a plurality of bus bars having protrusions, and provides a technique for suppressing the influence of a noise magnetic field caused by the protrusions of adjacent bus bars. In addition, since the current sensor disclosed in the present specification is also characterized by the shape of the bus bar, the characteristic shape of the bus bar is included in the configuration of the current sensor.

  In the following description, “two bus bars” will be described as an example as a representative of “a plurality of bus bars”. That is, hereinafter, a current sensor that measures the current flowing through each of the two bus bars will be described. This is to make the invention easier to understand. It should be noted that the technique described below is not limited to two bus bars, but can be applied to a current sensor that measures a current flowing through each of three or more bus bars.

  The current sensor disclosed in the present specification includes two bus bars arranged in parallel and two magnetoelectric conversion elements. A cutout and a protrusion are provided on each of the two bus bars. The notches of each bus bar are provided at positions that do not overlap with the notches of the adjacent bus bars in the bus bar extending direction. Each magnetoelectric conversion element is arranged inside each notch. Each protrusion extends in a direction orthogonal to the direction in which the bus bars are arranged. Each protrusion is provided so as to be positioned between the two magnetoelectric conversion elements when viewed from the direction in which the two bus bars are arranged, and not to overlap the two magnetoelectric conversion elements. Yes.

  According to this configuration, the cross-sectional area of the bus bar is reduced by the notch, and the current density at the portion is increased. Hereinafter, a part having a smaller cross-sectional area than other parts without notches is referred to as a narrow part. Since the strength of the magnetic field induced by the current is proportional to the current density, the magnetic field generated by the narrow bus bar is stronger than the magnetic field generated by other parts of the bus bar. The magnetoelectric transducer arranged in the notch measures the magnetic field strengthened by the narrow portion. On the other hand, the notches of each bus bar are arranged so as not to overlap the notches of the adjacent bus bars in the bus bar extending direction. Therefore, the magnetoelectric conversion element is not greatly affected by the magnetic field generated from the narrow portion of the adjacent bus bar.

  On the other hand, the bus bar is provided with a projection for positioning with respect to the mold in order to accurately determine the relative position of each bus bar. A magnetic field that becomes noise is also generated from the portion including the protrusion. However, as described above, the protrusion is provided between the two magnetoelectric conversion elements so as not to overlap with the magnetoelectric conversion elements when viewed from the arrangement direction of the bus bars. Therefore, the noise magnetic field generated by the protrusion does not greatly affect the magnetoelectric conversion element. Further, since the protrusion is provided so as to be positioned between the two magnetoelectric conversion elements, the length of the current sensor in the bus bar extending direction is not affected by the protrusion and is determined by the positions of the two notches. That is, the protrusion does not enlarge the entire current sensor.

  Details and further improvements of the technology disclosed in this specification will be described in the following “DETAILED DESCRIPTION”.

It is a perspective view of the current sensor of an example. It is a perspective view which shows only a bus bar. It is a top view of a current sensor. It is the top view which looked at two adjacent bus bars from the arrangement direction. (The two bus bars are drawn shifted in the Z-axis direction.) It is sectional drawing in the VV line of FIG.

  A current sensor according to an embodiment will be described with reference to the drawings. FIG. 1 is a perspective view of a current sensor 200 according to the embodiment. The current sensor 200 includes a bus bar unit 3 and a sensor unit 4. In the bus bar unit 3, three bus bars 2a, 2b, and 2c (hereinafter may be collectively referred to as "bus bar 2") and a shield plate 6 disposed below the bus bar 2 are molded with resin. Is a unit. Hereinafter, the molded resin is referred to as a mold body 5. FIG. 1 is a diagram schematically showing the mold body 5 transparently. In FIG. 1, the mold body 5 is drawn with a one-dot chain line. One end 24 of the bus bar 2 is exposed on one side surface of the mold body 5. The other end 25 of the bus bar 2 is exposed on the lower surface of the mold body 5. Each bus bar 2a, 2b, 2c is provided with a notch 21a, 21b, 21c. Since the current sensor 200 of the present embodiment is also characterized by the shape of the bus bar 2, the bus bar 2 having a characteristic shape is included in the configuration of the current sensor 200. In the present specification, an XYZ coordinate system is shown in the figure, and in this specification, the configuration of the embodiment will be described using the XYZ coordinate system as appropriate. In the present specification, the Z-axis direction indicates the “vertical direction”.

  The sensor unit 4 is a unit in which a plurality of magnetoelectric conversion elements, a substrate to which the plurality of magnetoelectric conversion elements are connected, and a shield plate are molded with resin. Hereinafter, the molded resin is referred to as a mold body 42. Further, the output terminal 44 is exposed on the upper surface of the mold body 42. The output terminal 44 is a terminal for outputting a signal output from the magnetoelectric conversion element to the outside of the sensor unit 4 through the substrate. The sensor unit 4 is fitted in a fitting portion 52 provided on the upper surface of the molded body 5 of the bus bar unit 3. The fitting part 52 is a recess provided on the upper surface of the mold body 5 along the shape of the notches 21 a, 21 b, 21 c of the bus bar 2. When the sensor unit 4 is fitted into the fitting portion 52 of the bus bar unit 3, each of the plurality of magnetoelectric conversion elements in the sensor unit 4 is arranged inside each notch 21 a, 21 b, 21 c of the bus bar 2.

  Current sensor 200 is provided inside an inverter mounted on an electric vehicle. The inverter is a device for converting battery power into AC power suitable for supply of a traveling three-phase AC motor (hereinafter referred to as a motor), and includes an inverter circuit board on the inside. The current sensor 200 is connected between the inverter circuit board and the traveling motor. One end 24 of the bus bar 2 is connected to the inverter circuit board. The other end 25 of the bus bar 2 is connected to a traveling motor. A current value of electric power supplied to the motor is measured by the current sensor 200. In an electric vehicle, in order to drive the motor with the required torque, current feedback control of the motor is executed. The current value measured by the current sensor 200 is used to calculate a control amount for current feedback control.

  The configuration of the bus bar 2 will be described with reference to FIG. FIG. 2 is a perspective view showing only the bus bar 2 of the bus bar unit 3. A large current flows through the motor of the electric vehicle. Therefore, a bus bar made of an elongated metal plate is adopted so as to reduce the internal resistance. As shown in FIG. 2, the bus bars 2a, 2b, 2c are elongated metal plates, and their thicknesses are the same. The bus bars 2a, 2b, and 2c are arranged in parallel so that the wide side faces thereof. Furthermore, the bus bars 2a, 2b, and 2c are arranged so that the narrow side surfaces thereof are aligned in the vertical direction (Z-axis direction). The bus bar 2 extends along the X-axis direction.

  As shown in FIG. 2, each of the bus bars 2a, 2b, 2c is provided with rectangular cutouts 21a, 21b, 21c and rectangular cutouts 22a, 22b, 22c. The notches 21a, 21b, and 21c have the same shape, and the notches 22a, 22b, and 22c have the same shape. In the bus bar 2a, the notch 21a is located above the bus bar 2a, and the notch 22a is located below the bus bar 2a. The notch 21a and the notch 22a are disposed at the same position in the extending direction of the bus bar 2a (that is, the X-axis direction). Due to the notch 21a and the notch 22a, the bus bar 2a has a portion (hereinafter referred to as a narrow portion 26a) having a smaller cross-sectional area between the notch 21a and the notch 22a than other portions not having the notch. Similarly to the bus bar 2a, the other bus bars 2b and 2c are provided with notches 21b and 21c and notches 22b and 22c. The bus bars 2b and 2c have narrow portions 26b and 26c, respectively, similarly to the bus bar 2a.

  The notches 21a, 21b, 21c are arranged in a V shape when viewed from above (that is, viewed from the Z-axis direction). In other words, the notch 21a of the bus bar 2a is arranged so as not to overlap the notch 21b of the bus bar 2b adjacent to the bus bar 2a in the extending direction. Similarly, the notch 21c of the bus bar 2c is arranged so as not to overlap the notch 21c of the bus bar 2b adjacent to the bus bar 2c in the extending direction. In particular, the notches 21a and 21c of the bus bars 2a and 2c are arranged so as to be offset in the X-axis positive direction with respect to the notches 21b of the adjacent bus bars 2b when viewed from the arrangement direction (that is, the Y-axis direction). ing. When viewed from the alignment direction, the inner surface of the notches 21a and 21c of the bus bars 2a and 2c on the X-axis negative direction side and the inner surface of the notch 22b on the X-axis positive direction side are the same in the extending direction. In position.

  Furthermore, each bus bar 2a, 2b, 2c is provided with a protrusion 23a, 23b, 23c. The protrusions 23a, 23b, and 23c are provided on the lower surfaces of the bus bars 2a, 2b, and 2c so as to be adjacent to the notches 22a, 22b, and 22c. That is, the protrusions 23a, 23b, and 23c extend in a direction orthogonal to the arrangement direction (that is, the Z-axis direction). Each protrusion 23a, 23b, 23c is located outside each notch 22a, 22b, 22c. In particular, the protrusions 23a and 23c of the bus bars 2a and 2c are disposed in the X-axis negative direction with respect to the notches 22a and 22c. The side surfaces on the X axis positive direction side of the protrusions 23a and 23c and the inner side surfaces on the X axis negative direction side of the notches 22a and 22c are positioned on one plane. On the other hand, the protrusion 23b of the bus bar 2b is arranged in the positive direction of the X axis with respect to the notch 22b. The side surface of the protrusion 23b on the negative X-axis side and the inner surface of the notch 22b on the positive X-axis side are located on one plane.

  With reference to FIG. 3, the positional relationship between the magnetoelectric conversion element included in the sensor unit 4 and the bus bar 2 included in the bus bar unit 3 will be described. FIG. 3 is a top view of the current sensor 200. In FIG. 3, as in FIG. 1, the mold body 5 of the bus bar unit 3 is schematically drawn in a transparent manner, and the mold body 5 is drawn in a dashed line. The sensor unit 4 includes three magnetoelectric conversion elements 7a, 7b, and 7c on the inner side. The magnetoelectric conversion elements 7a, 7b, and 7c are arranged inside the notches 21a, 21b, and 21c of the bus bar 2 when the sensor unit 4 is fitted into the fitting portion 52 of the bus bar unit 3. In the drawing, the illustration of the electronic parts other than the magnetoelectric conversion elements 7a, 7b, 7c is omitted.

  The shield plate 46 and the substrate 48 included in the sensor unit 4 have a shape that follows the outer shape of the sensor unit 4. Although not shown in FIG. 3, the shield plate 46 is disposed on the substrate 48. Magnetoelectric conversion elements 7 a, 7 b, and 7 c are connected to the lower surface of the substrate 48. Part of the shield plate 46 and the substrate 48 is fitted inside the notches 21a, 21b, and 21c together with the magnetoelectric conversion elements 7a, 7b, and 7c by the sensor unit 4 being fitted into the fitting portion 52 of the bus bar unit 3. Be placed. As described above, the shield plate 6 of the bus bar unit 3 is disposed under the bus bar 2. Therefore, the magnetoelectric conversion elements 7a, 7b, 7c are sandwiched between the two shield plates 46, 6 up and down. The magnetoelectric conversion elements 7 a, 7 b, 7 c are cut off from a magnetic field generated from an electronic component located outside the current sensor 200 by being sandwiched between the two shield plates 46, 6.

  Furthermore, with reference to FIG. 4, the positional relationship between the magnetoelectric conversion element included in the sensor unit 4 and each protrusion of the bus bar 2 will be described. FIG. 4 is a plan view of the bus bars 2a and 2b adjacent to each other in the bus bar 2 as viewed from the arrangement direction (that is, the Y-axis direction). FIG. 4 is a diagram in which two bus bars 2a and 2b arranged in parallel are arranged side by side in the vertical direction on the paper surface while maintaining the positional relationship along the X-axis direction for comparison. As described above, the notch 21b is disposed so as not to overlap the notch 21a in the extending direction (that is, the X-axis direction). Therefore, as shown in FIG. 4, the magnetoelectric conversion element 7b arranged inside the notch 21b is arranged so as not to overlap the notch 21a of the adjacent bus bar 2a in the extending direction. In particular, the magnetoelectric conversion elements 7a and 7b are arranged so as not to overlap in the extending direction. The protrusion 23a of the bus bar 2a is provided so as to be positioned between the magnetoelectric conversion elements 7a and 7b disposed in the notches 21a and 21b when viewed from the bus bar arrangement direction (Y-axis direction). Furthermore, the protrusion 23a is disposed so as not to overlap the magnetoelectric conversion elements 7a and 7b when viewed from the bus bar arrangement direction. Specifically, the bus bar 2b is located outside the space sandwiched between the plane P1 along the side surface on the X axis negative direction side of the protrusion 23a and the plane P2 along the side surface on the X axis positive direction side. The magnetoelectric conversion element 7b is located.

  Similarly, the protrusion 23b of the bus bar 2b is provided so as to be positioned between the magnetoelectric conversion elements 7a and 7b arranged in the notches 21a and 21b, respectively, when viewed from the arrangement direction of the bus bars. It arrange | positions so that it may not overlap with the magnetoelectric conversion elements 7a and 7b in the extending direction. Specifically, the bus bar 2b is located outside the space sandwiched between the plane P3 along the side surface on the X-axis positive direction side of the protrusion 23b and the plane P2 along the side surface on the X-axis negative direction side. The magnetoelectric conversion element 7b is located. In this embodiment, when viewed from the arrangement direction, the inner surface of the notch 22a on the X axis negative direction side and the inner surface of the notch 22b on the X axis positive direction side are in the same position in the extending direction. is there. Therefore, the plane along the side surface on the X axis negative direction side of the projection 23b and the plane along the side surface on the X axis positive direction side of the projection 23a are the same plane P2.

  In the bus bars 2b and 2c adjacent to each other in the bus bar 2, the positional relationship between the protrusions 23b and 23c and the magnetoelectric transducers 7b and 7c is the same as the positional relationship related to the bus bars 2a and 2b described above.

  With reference to FIG. 5, the function of the protrusions 23a, 23b, and 23c provided on the bus bar 2 will be described. FIG. 5 is a cross-sectional view taken along line VV in FIG. In FIG. 3, the VV line shows a cross section passing through the protrusion 23a of the bus bar 2a and the protrusion 23c of the bus bar 2c. The bus bar 2 is fixed to a mold when it is molded with resin. The protrusions 23a, 23b, and 23c are protrusions for fixing the bus bar 2 to the mold. By fixing the projections 23a, 23b, 23c of the three bus bars 2 to the mold, the relative positions of the three bus bars 2 are determined. In FIG. 5, a part of the mold 8 for fixing the bus bar 2 is indicated by an imaginary line. The mold 8 is removed from the bus bar unit 3 after being molded with resin. FIG. 5 shows the mold 8 before being removed. In addition, in order to make a figure easy to understand, the metal mold | die 8 drawn with the dashed-dotted line is also hatched. The mold 8 is provided with a fitting portion 81a at a position facing the protrusion 23a of the bus bar 2a. The protrusion 23a is fitted to the fitting portion 81a. The bus bar 2a is fixed to the mold 8 by fitting the protrusion 23a into the fitting portion 81a. Similarly to the fitting portion 81a, the mold 8 is also provided with a fitting portion (not shown) in which the protrusion 23b of the bus bar 2b is fitted and a fitting portion 81c in which the protrusion 23c of the bus bar 2c is fitted. . The bus bars 2b and 2c are fixed to the mold 8 by fitting the protrusions 23b and 23c into the fitting portions 81b and 81c, respectively. By fixing each bus bar 2a, 2b, 2c to the mold 8, the relative position of each bus bar 2a, 2b, 2c can be determined with high accuracy. That is, the protrusions 23a, 23b, and 23c are provided to determine the relative positions of the three bus bars 2 using the mold 8.

  The effect of the current sensor 200 will be described. Below, the effect with respect to the magnetoelectric conversion element 7b is demonstrated as a representative. As described above, the area of the cross section of the narrow portion 26b of the bus bar 2b is smaller than the area of the cross section of the portion having no notch. Therefore, the current density of the current passing through the narrow portion 26b is higher than the current density of the current passing through the portion where the bus bar 2b is not cut. By increasing the current density by the narrow portion 26b, the magnetic flux density of the magnetic flux generated around the narrow portion 26b is also increased. By sensing the increased magnetic flux density, the magnetoelectric conversion element 7b is hardly affected by a magnetic field (for example, a magnetic field generated from an adjacent bus bar) that becomes noise. Therefore, the magnetoelectric conversion element 7b can detect the magnetic flux density of the magnetic flux generated by the current passing through the bus bar 2b with high accuracy.

  Further, the notch 21b is disposed so as not to overlap with the notches 21a and 21c of the adjacent bus bars 2a and 2c in the extending direction of the bus bar. That is, the magnetoelectric conversion element 7b arranged in the notch 21b is arranged so as not to overlap the notches 21a and 21c of the adjacent bus bars 2a and 2c, that is, the narrow portions 26a and 26c in the extending direction. . Therefore, the magnetoelectric conversion element 7b is not greatly affected by the magnetic field whose magnetic flux density is increased by the narrow portions 26a and 26c of the adjacent bus bars 2a and 2c.

  Moreover, the shape of the portion including the protrusions 23a and 23c of the adjacent bus bars 2a and 2c has changed from the other portion having no notch. Therefore, the shape of the magnetic field generated from the part including the protrusions 23a and 23c is different from the shape of the magnetic field generated from the other part. Therefore, the magnetic field generated from the portion including the protrusions 23a and 23c may become noise of the magnetoelectric conversion element 7b. However, as described above, the protrusions 23a and 23c are arranged so as not to overlap the magnetoelectric conversion element 7b when viewed from the arrangement direction. Therefore, the magnetoelectric conversion element 7b is not greatly affected by the magnetic field generated from the portion including the protrusions 23a and 23c. That is, the protrusions 23a and 23c for determining the relative positions of the bus bars 2a and 2c with respect to the bus bar 2b can be provided on the bus bar 2b while suppressing the influence on the magnetoelectric conversion element 7b.

  Similarly to the magnetoelectric conversion element 7b, the magnetoelectric conversion elements 7a and 7c are not significantly affected by the magnetic field generated from the adjacent bus bar, and are not significantly affected by the noise magnetic field caused by the protrusion of the adjacent bus bar.

  The current sensor 200 also has the following characteristics. The protrusions 23a, 23b, and 23c of each bus bar 2a, 2b, and 2c are disposed between the magnetoelectric conversion elements 7a and 7b (in other words, between the magnetoelectric conversion elements 7b and 7c) when viewed from the arrangement direction. Has been. That is, the protrusions 23a, 23b, and 23c can be gathered inside the bus bar unit 3 from the magnetoelectric conversion elements 7a, 7b, and 7c. This contributes to downsizing of the bus bar unit 3 in the extending direction, that is, in the X-axis direction.

  The current sensor 200 having the above-described features can improve the measurement accuracy by synergy of the following effects. (1) The magnetic field generated from the bus bar to be measured is strengthened by the notch. (2) Since the magnetoelectric conversion element does not overlap with the notch of the adjacent non-measurement target bus bar along the extending direction of the bus bar, the magnetoelectric conversion element is hardly affected by the magnetic field generated from the narrow portion of the adjacent bus bar. (3) By positioning the projection for positioning with respect to the mold so as not to overlap the magnetoelectric conversion element when viewed from the bus bar arrangement direction, the magnetoelectric conversion element is affected by the magnetic field generated from the portion having the projection. It is difficult to receive.

  Hereinafter, points to be noted regarding the technology shown in the embodiments will be described. The number of bus bars shown in the embodiments is merely an example, and the technology disclosed in this specification can be used without being limited to the number of bus bars.

  Further, in the embodiment, when viewed from the arrangement direction, the inner surface on one side of the notch and the inner surface on the other side of the notch of the adjacent bus bar are at the same position along the extending direction. Alternatively, when viewed from the arrangement direction, the inner surface on one side of the notch and the inner surface on the other side of the notch of the adjacent bus bar may be separated from each other along the extending direction. . That is, each notch should just be arrange | positioned so that it may not overlap with the notch of an adjacent bus bar in the extending direction of a bus bar.

  In the present embodiment, the magnetoelectric transducer 7b positioned in the adjacent bus bar 2b is located outside the space (hereinafter referred to as the protrusion space) sandwiched between the plane P1 and the plane P2 of the protrusion 23a (see FIG. 4). That is, the magnetoelectric conversion element 7b, which is the main part for sensing the magnetic flux, is located at least outside the projection space, and the electronic parts other than the magnetoelectric conversion element 7b are located inside the projection space. Also good.

  Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings can achieve a plurality of objects at the same time, and has technical usefulness by achieving one of the objects.

2 (2a-2c): Bus bar 3: Bus bar unit 4: Sensor unit 5: Mold body 6 Shield plates 7a, 7b, 7c: Magnetoelectric transducer 8: Mold 21a-21c: Notch (upper side)
22a-22c: Notch (lower side)
23a-23c: Protrusion 42: Mold body 44: Output terminal 46: Shield plate 48: Substrate 200: Current sensor

Claims (1)

Two bus bars arranged in parallel, each bus bar being provided with a notch and a protrusion extending in a direction perpendicular to the direction in which the bus bars are arranged;
A magnetoelectric transducer disposed inside each notch;
With
Each notch is provided so as not to overlap with a notch of an adjacent bus bar in the extending direction of the bus bar,
The protrusions of the bus bars are positioned between the two magnetoelectric transducers and do not overlap the two magnetoelectric transducers when viewed from the direction in which the two bus bars are arranged. Provided in the
A current sensor characterized by that.

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