Power Conversion Equipment

Abstract

To provide an electric power conversion device in which both thinning and suppression of magnetic interference are achieved.SOLUTION: An electric power conversion device comprises an inverter circuit, an AC conductor, a magnetic sensor for detecting magnetism generated when an AC current flows, a first magnetic body and a second magnetic body opposed to the AC conductor across the magnetic sensor, and a first enclosure and a second enclosure formed of electric conductive members. The first enclosure covers one opening of a space sandwiched between the first magnetic body and the second magnetic body, and the second enclosure covers the other opening of the space. Respective end parts of the first magnetic body and the second magnetic body are so formed that distances to the first enclosure or the second enclosure are smaller than array-directional thicknesses of the first magnetic body and the second magnetic body.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a power conversion device. [Background technology]

[0002] As background technology of the present invention, the following Patent Document 1 discloses a coreless current measuring device in which the sides and bottom of the magnetic sensor are shielded with a magnetic material so as to prevent a response delay in current detection even when magnetic noise is present from outside the magnetic shield. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-184355 A Summary of the Invention [Problem to be solved by the invention]

[0004] Based on the configuration described in Patent Document 1, in order to further meet customer requests and to achieve similar effects even with a thin power conversion device structure, the present invention aims to provide a power conversion device that combines thinness with magnetic interference suppression. [Means for solving the problem]

[0005] The power conversion device includes an inverter circuit that converts direct current into alternating current, an AC conductor that transmits the AC current, a magnetic sensor that detects the magnetic field generated when the AC current flows through the AC conductor, a first magnetic body and a second magnetic body that face each other across the AC conductor and the magnetic sensor, and a first housing and a second housing formed of a conductive material, wherein the first housing covers one opening in a space sandwiched between the first magnetic body and the second magnetic body, and the second housing covers the other opening of the space, and each end of the first magnetic body and the second magnetic body is formed so that the distance to the first housing or the second housing is smaller than the thickness of the first magnetic body and the second magnetic body in the arrangement direction. Effect of the Invention

[0006] According to the present invention, it is possible to provide a power conversion device that is both thin and capable of suppressing magnetic interference. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view of an external appearance of a power conversion device according to an embodiment of the present invention, and a view of the inside of the housing with the housing cover removed. [Diagram 2] An exploded perspective view and a block diagram of a power conversion device according to an embodiment of the present invention. [Diagram 3] 1 is a perspective view and an AA cross-sectional view of a magnetic sensor and its surroundings according to a first embodiment of the present invention; [Figure 4] Cross-sectional view of Fig. 3(b) seen from the R direction [Diagram 5] 1 is a cross-sectional view of a magnetic sensor and its surroundings according to a first embodiment of the present invention; [Figure 6] FIG. 1 is an explanatory diagram of the distance between the housing and the magnetic body according to the first embodiment of the present invention. [Figure 7] 1 is a cross-sectional view of a magnetic sensor and its surroundings according to a second embodiment of the present invention; [Figure 8] 11 is a cross-sectional view of a magnetic sensor and its surroundings according to a third embodiment of the present invention; [Figure 9] 11 is a cross-sectional view of a magnetic sensor and its surroundings according to a fourth embodiment of the present invention; [Figure 10]13 is a cross-sectional view of a magnetic sensor and its surroundings according to a fifth embodiment of the present invention. [Figure 11] 13 is a cross-sectional view of a magnetic sensor and its surroundings according to a sixth embodiment of the present invention. [Figure 12] FIG. 13 is a diagram illustrating a magnetic detection sensitivity correction unit according to a seventh embodiment of the present invention.

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The following description and drawings are examples for explaining the present invention, and appropriate omissions and simplifications have been made for clarity of explanation. The present invention can be implemented in various other forms. Unless otherwise specified, each component may be singular or plural.

[0009] In order to facilitate understanding of the invention, the position, size, shape, range, etc. of each component shown in the drawings may not represent the actual position, size, shape, range, etc. Therefore, the present invention is not necessarily limited to the position, size, shape, range, etc. disclosed in the drawings.

[0010] (First embodiment and configuration of power conversion device) FIG. 1 is an external perspective view of a power conversion device according to an embodiment of the present invention and a view of the inside of a housing with a housing cover removed.

[0011] The housing 2a of the power converter includes a DC input terminal 22 that supplies a DC current to the inverter circuit housed inside the housing 2a, an AC conductor 6 that outputs an AC current from the inverter to the outside, a refrigerant inlet 21 that supplies a refrigerant for cooling the inverter circuit to the inside of the housing 2a, and a control signal input / output terminal 7 that transmits a control signal of the inverter circuit to an external control device. The housing 2 at the bottom (base) of the housing 2a is made of a conductive material. The cover of this housing 2a seals the inside to prevent foreign objects and water from entering from the outside.

[0012] The housing 2a contains a capacitor 25 that smoothes the input current input from the DC input terminal 22, a main circuit section 24 that converts DC current to AC current, a refrigerant flow path 23 that cools the main circuit section 24, a magnetic detection board 8 that detects the magnetic flux generated by the AC conductor 6, and a first housing 1 formed to cover the magnetic detection board 8. The first housing 1 is a conductive member. The magnetic detection board 8 has three magnetic sensors 5 (see FIG. 3) corresponding to the three phases of the AC conductor 6, respectively, and is fixed to the second housing 2 by screws or the like.

[0013] FIG. 2 is an exploded perspective view and a block diagram of a power conversion device according to one embodiment of the present invention.

[0014] The main circuit section 24 of the inverter circuit is composed of the DC input terminal 22, a capacitor 25, an IGBT element 26, a diode element 27, and an AC conductor 6. The capacitor 25 is connected in parallel with the positive and negative electrodes of the DC input terminal 22. A part in which the IGBT element 26 and the diode element 27 are connected in series and function as a switching element is connected in parallel with the capacitor 25 to form a half-bridge circuit. The IGBT element 26 is turned on or off based on a signal from a control circuit (not shown) to convert DC current to AC current.

[0015] Coolant flow paths 23 are provided on the upper and lower main surfaces of the main circuit section 24. A coolant such as a long-life coolant supplied from the outside via a coolant inlet 21 flows inside the coolant flow path 23. Fins are formed inside the coolant flow path 23 to improve cooling performance. The main circuit section 24 is sealed with insulating resin to insulate it from the coolant flow path 23 and the second housing 2.

[0016] The heat dissipation surface of the main circuit section 24 that comes into contact with the refrigerant flow path 23 is coated with heat dissipation grease or the like to increase adhesion with the refrigerant flow path 23 and reduce contact thermal resistance. The main circuit section 24 is configured by mounting an IGBT element 26 and a diode element 27 on a wiring material such as a printed circuit board.

[0017] The main circuit section 24 and the capacitor 25 are electrically connected by a joining material such as solder. The AC conductor 6 is electrically connected to the main circuit section 24 by screw fastening, solder joining, or the like.

[0018] FIG. 3 is a perspective view and an AA cross-sectional view of the periphery of the magnetic sensor according to the first embodiment of the present invention.

[0019] The output signal of the magnetic sensor 5 is transmitted from the control signal input / output terminal 7 to an inverter control circuit (not shown) outside the housing 2a via wiring on the magnetic detection board 8. In addition to the magnetic sensor 5, the magnetic detection board 8 is equipped with a power supply circuit that supplies power to the magnetic sensor 5, and the like. After passing through the underside of the magnetic sensor 5, the AC conductor 6 protrudes toward the underside of the first housing 1, thereby preventing the magnetic flux of the motor current from interfering with electronic components other than the magnetic sensor 5.

[0020] The first magnetic body 3 and the second magnetic body 4 are formed to be longer in the left-right direction of the page than the magnetic sensor 5. This makes it possible to suppress magnetic flux from entering from the left and right side surfaces of the first magnetic body 3 and the second magnetic body 4.

[0021] FIG. 4 is a cross-sectional view of FIG. 3(b) seen from the R direction.

[0022] The first magnetic body 3 and the second magnetic body 4 are constructed of electromagnetic steel plates or ferrite cores, and are arranged in positions facing each other with the AC conductor (wiring) 6 and the magnetic sensor 5 sandwiched between them. The first housing 1 covers one opening in the space sandwiched between the first magnetic body 3 and the second magnetic body 4, and the second housing 2 covers the other opening. This arrangement makes it possible to collect the magnetic flux that spreads to the left and right when a current flows through the AC conductor 6, thereby suppressing leakage to the surroundings. The first magnetic body 3 and the second magnetic body 4 are fixed in a through hole (not shown) provided in the magnetic detection board 8. The positions of the magnetic bodies 3 and 4 are determined to be line-symmetrical with respect to the center of the magnetic sensor 5 and the AC conductor 6 by this through hole.

[0023] A plurality of magnetic sensors 5 are arranged on the magnetic detection substrate 8 in the arrangement direction of the first magnetic bodies 3 and the second magnetic bodies 4, and are arranged above the AC conductors 6 of each phase in order to detect magnetic flux generated by the current of each phase flowing through the AC conductors 6. The magnetic sensors 5 detect magnetic flux in the left-right direction of the page, thereby reducing interference from external magnetic flux. In addition, the magnetic sensors 5 can be placed close to the AC conductors 6 to increase their magnetic flux detection sensitivity.

[0024] FIG. 5 is a cross-sectional view of the magnetic sensor and its surroundings according to the first embodiment of the present invention.

[0025] The first housing 1 and the second housing 2 are constructed of a non-magnetic conductor such as aluminum, and are arranged to cover the opening of the space sandwiched between the first magnetic body 3 and the second magnetic body 4. As a result, magnetic flux 9 generated when motor current 11 flows through the AC conductor 6 generates induced current 10 in the first housing 1 and the second housing 2, and the magnetic flux caused by this induced current 10 blocks the magnetic flux 9 caused by the motor current 11. In this way, the magnetic bodies 3 and 4 are arranged only on the sides of the magnetic sensor 5 between the AC conductors 6 of each phase, and no magnetic shield is provided in the height direction (up and down on the paper), which contributes to a slimmer design while suppressing magnetic flux leakage from this space to other phases.

[0026] This structure makes it possible to prevent the magnetic flux 9 of the motor current 11 flowing through the AC conductor 6 from interfering with the magnetic sensor 5 of the other phase and the surrounding circuits, without providing additional magnetic bodies on the upper surface of the magnetic sensor 5 and the lower surface of the AC conductor 6. This achieves both a thinner power conversion device and improved current detection accuracy. Furthermore, this structure improves assembly because the magnetic bodies 3, 4 and the housings 1, 2 that prevent leakage of the magnetic flux 9 are each separate.

[0027] The first housing 1 is arranged to cover the magnetic detection board 8 and serves as an object to which the control board (not shown) is fixed when it is placed on top, and also stabilizes the potential of the control circuit by forming a wide case potential surface on the underside of the control board.

[0028] The AC conductor 6 is made of a conductor such as copper, and is electrically connected to the output terminal of the power module and the motor by welding or screwing. The AC conductor 6 is fixed to the second housing 2 via an insulating material 28. Therefore, the relative positions of the AC conductor 6, the magnetic bodies 3 and 4, and the magnetic sensor 5 are determined via the second housing 2 and the magnetic detection board 8.

[0029] FIG. 6 is an explanatory diagram of the distance between the housing and the magnetic body according to the first embodiment of the present invention.

[0030] The thickness 12 in the arrangement direction of the first magnetic body 3 and the second magnetic body 4 refers to the thickness of the portion (end of the magnetic body) where the first magnetic body 3 or the second magnetic body 4 is closest to the first housing 1 or the second housing 2, respectively. The distance 13 from each end of the first magnetic body 3 or the second magnetic body 4 to the first housing 1 or the second housing 2 refers to the distance between the portion where the first magnetic body 3 or the second magnetic body 4 is closest to the first housing 1 or the second housing 2. The magnetic bodies 3 and 4 are arranged so that the distance 13 is smaller than the thickness 12 of the end of the magnetic bodies 3 and 4. As long as this condition can be achieved, there is no limitation on the shape of the central portion of the magnetic bodies 3 and 4, and for example, the central portion of the magnetic bodies 3 and 4 may be shaped so as to be constricted. In addition, the magnetic bodies 3 and 4 may be in contact with the housings 1 and 2.

[0031] Second Embodiment FIG. 7 is a cross-sectional view of the periphery of a magnetic sensor according to the second embodiment of the present invention.

[0032] The first housing 1 has a convex portion 1a on the upper surface of the magnetic sensor 5, the first magnetic body 3, the second magnetic body 4, and the AC conductor 6, which faces the second housing 2 while leaving a space for the installation location of the electronic component 14. The first housing 1 has the convex portion 1a so that the ends of the first magnetic body 3 and the second magnetic body 4 are close to the first housing 1. As a result, when an electronic component 14 larger than the magnetic sensor 5 is mounted on the magnetic detection board 8, it is not necessary to increase the size of the first magnetic body 3 and the second magnetic body 4. In addition, the first magnetic body 3 and the second magnetic body 4 are arranged so that the distance to the first housing 1 or the second housing 2 is smaller than the thickness 12 in the arrangement direction of the first magnetic body 3 and the second magnetic body 4 described above.

[0033] (Third embodiment) FIG. 8 is a cross-sectional view of the periphery of a magnetic sensor according to the third embodiment of the present invention.

[0034] The first housing 1 has a recess 1b facing outward on the upper surfaces of the magnetic sensor 5, the first magnetic body 3, the second magnetic body 4, and the AC conductor 6. The recess 1b covers the side surfaces of the first magnetic body 3 and the second magnetic body 4 with the first housing 1, so that magnetic flux leaking to the side (left and right on the page) from gaps between the first magnetic body 3 and the second magnetic body 4 and the first housing 1 can be suppressed.

[0035] (Fourth embodiment) FIG. 9 is a cross-sectional view of the periphery of a magnetic sensor according to the fourth embodiment of the present invention.

[0036] The first magnetic body 3 and the second magnetic body 4 have magnetic body protrusions 15 on their opposing surfaces. The extension lines of the protruding parts of the magnetic body protrusions 15 are formed on the first housing 1 and the second housing 2 side from the upper surface of the magnetic sensor 5 and the lower surface of the AC conductor 6. By providing the protrusions 15 on the opposing surfaces of the first magnetic body 3 and the second magnetic body 4 in this manner, the magnetic flux of the motor current flowing through the AC conductor 6 is guided to the magnetic body protrusions 15, and the magnetic flux leaking to the surroundings from the space sandwiched between the magnetic body protrusions 15 of the first magnetic body 3 and the second magnetic body 4 or from the openings thereof is suppressed.

[0037] Fifth embodiment FIG. 10 is a cross-sectional view of the magnetic sensor and its surroundings according to the fifth embodiment of the present invention.

[0038] The first magnetic body 3 and the second magnetic body 4 have magnetic protrusions 15, and their height positions are determined by being fixed to the magnetic detection board 8 by the magnetic protrusions 15. This makes it possible to accurately determine the relative positions of the first magnetic body 3, the second magnetic body 4, and the magnetic sensor 5.

[0039] As a fixing method, the magnetic bodies 3 and 4 can be fixed to the magnetic detection board 8 by applying an adhesive to the protruding parts 15 of the first magnetic body 3 and the second magnetic body 4. Alternatively, the potential of the first magnetic body 3 and the second magnetic body 4 can be determined by arranging a housing potential wiring (not shown) around the through hole 8a provided in the magnetic detection board 8 for inserting the first magnetic body 3 and the second magnetic body 4 and soldering the first magnetic body 3 and the second magnetic body 4 to the housing potential wiring.

[0040] Sixth embodiment FIG. 11 is a cross-sectional view of the periphery of a magnetic sensor according to the sixth embodiment of the present invention.

[0041] In this embodiment, instead of the AC conductor 6 described above, an AC wiring 6a is provided on the magnetic detection substrate 8, and a motor current 11 is configured to flow through this AC wiring 6a. In this case, by providing the AC wiring 6a on the back side of the surface on which the magnetic sensor 5 is mounted in the magnetic detection substrate 8, the magnetic sensor 5 and the AC wiring 6a can be brought close to each other while ensuring a creepage distance 29 required for insulation between the magnetic sensor 5 and the AC wiring 6a. This improves the sensitivity of the magnetic sensor 5 to detect magnetic flux. Furthermore, since the positions of the AC wiring 6a and the magnetic sensor 5 are accurately determined, the detection accuracy of the magnetic sensor 5 is improved.

[0042] Seventh embodiment FIG. 12 is a diagram illustrating a magnetic detection sensitivity correction unit according to the seventh embodiment of the present invention.

[0043] The magnetic sensor 5 detects the magnetic flux of the motor current flowing through the AC conductor 6, and outputs a magnetic flux detection value to the magnetic flux detection sensitivity correction unit 17. The angle sensor 20 is connected to the rotor of the motor, and outputs a rotor position signal to the speed conversion unit 19. The speed conversion unit 19 calculates the angular velocity of the motor rotor for the magnetic flux detection sensitivity correction unit 17 based on the rotor position signal input from the angle sensor 20. This angular velocity corresponds to the frequency of the motor current flowing through the AC conductor 6. The magnetic flux detection sensitivity correction unit 17 and the speed conversion unit 19 are mounted on a control unit (not shown) outside the housing, which is connected to the control signal input / output terminal of FIG. 1.

[0044] The magnetic flux detection sensitivity correction unit 17 has a preset relationship between the angular velocity of the motor rotor and the magnetic flux detection sensitivity of the magnetic sensor 5. Based on this relationship, the magnetic flux detection value input from the magnetic sensor 5 and the angular velocity input from the speed conversion unit 19 are used to calculate a corrected magnetic flux detection value and output it to the current calculation unit 18. The current calculation unit 18 calculates the motor current from the input corrected magnetic flux detection value based on the preset relationship between the magnetic flux detection value and the motor current. The current calculation unit 18 is mounted on a control unit (not shown) outside the housing that is connected to the control signal input / output terminal of FIG. 1.

[0045] This makes it possible to correct the change in the magnetic flux detection sensitivity of the magnetic sensor 5 caused by the induced current 10 generated in the first housing 1 and the second housing 2, and improve the detection accuracy of the motor current.

[0046] According to the first to seventh embodiments of the present invention described above, the following advantageous effects can be obtained.

[0047] (1) The power conversion device includes an inverter circuit that converts a direct current into an alternating current, an alternating current conductor 6 that transmits the alternating current, a magnetic sensor 5 that detects magnetism generated when an alternating current flows through the alternating current conductor, a first magnetic body 3 and a second magnetic body 4 that face each other across the alternating current conductor 6 and the magnetic sensor 5, and a first housing 1 and a second housing 2 that are formed of a conductive material. The first housing 1 covers one opening in the space sandwiched between the first magnetic body 3 and the second magnetic body 4, and the second housing 2 covers the other opening in the space, and the ends of the first magnetic body 3 and the second magnetic body 4 are formed so that the distance to the first housing 1 or the second housing 2 is smaller than the thickness of the first magnetic body 3 and the second magnetic body 4 in the arrangement direction. In this way, a power conversion device that is both thin and suppresses magnetic interference can be provided.

[0048] (2) The first housing 1 has a protrusion 1a formed on the surface facing the second housing 2 so as to protrude toward the second housing 2, and the magnetic sensor 5, the first magnetic body 1, the second magnetic body 2, and the AC conductor 6 are disposed between the protrusion 1a and the second housing 2. By doing so, when an electronic component larger than the magnetic sensor 5 is mounted, there is no need to increase the size of the first magnetic body 3 and the second magnetic body 4.

[0049] (3) The first housing 1 has a recess 1b formed on the surface facing the second housing 2, recessed in a direction away from the second housing 2, and the magnetic sensor 5, the first magnetic body, the second magnetic body, and the AC conductor 6 are disposed between the recess 1b and the second housing 2. In this manner, it is possible to suppress magnetic flux leaking sideways (to the left and right of the page) from the gaps between the first housing 1 and the first magnetic body 3 and the second magnetic body 4.

[0050] (4) The first magnetic body 3 and the second magnetic body 4 each have a magnetic convex portion 15 facing each other, and the extension lines of the convex portions of the magnetic convex portions 15 are formed on the first housing 1 and second housing 2 sides relative to the upper surface of the magnetic sensor 5 and the lower surface of the AC conductor 6. In this way, the magnetic flux of the motor current flowing through the AC conductor 6 is guided to the magnetic convex portions 15, and the magnetic flux leaking to the surroundings from the space between the magnetic convex portions 15 of the first magnetic body 3 and the second magnetic body 4 or from the openings therein is suppressed.

[0051] (5) A magnetic detection substrate 8 on which a magnetic sensor 5 is arranged is provided, and the first magnetic body 3 and the second magnetic body 4 have magnetic convex portions 1a, which fix the first magnetic body 3 and the second magnetic body 4 to the magnetic detection substrate 8. In this way, the relative positions of the first magnetic body 3 and the second magnetic body 4 and the magnetic sensor 5 can be determined with high accuracy, and the electric potentials of the first magnetic body 3 and the second magnetic body 4 can be determined.

[0052] (6) A magnetic detection board 8 on which the magnetic sensor 5 is arranged is provided, the AC conductor 6 is formed by wiring provided on the magnetic detection board 8, and the magnetic sensor 5 is arranged on the surface of the magnetic detection board 8 on which the AC conductor 6 is not arranged. In this way, the magnetic sensor 5 and the AC wiring 6a can be placed close to each other while ensuring a creepage distance required for insulation between the magnetic sensor 5 and the AC wiring 6a, improving the sensitivity of the magnetic sensor 5 to detect magnetic flux. Furthermore, since the positions of the AC wiring 6a and the magnetic sensor 5 are accurately determined, the detection accuracy of the magnetic sensor 5 is improved.

[0053] (7) The motor includes a speed conversion unit 19 that converts a rotor position signal output from an angle sensor 20 connected to the rotor of the motor into an angular velocity, and a magnetic flux detection sensitivity correction unit 17 that corrects a magnetic flux detection value output from the magnetic sensor 5, and the magnetic flux detection sensitivity correction unit 17 corrects the magnetic flux detection value based on the magnetic flux detection value output from the magnetic sensor 5, the angular velocity output from the speed conversion unit 19, and a preset relationship between the angular velocity and the magnetic flux detection sensitivity. In this way, it is possible to correct the change in the magnetic flux detection sensitivity of the magnetic sensor 5 that changes due to the induced current 10 generated in the first housing 1 and the second housing 2, and improve the detection accuracy of the motor current.

[0054] The present invention is not limited to the above-mentioned embodiment, and various modifications and other configurations can be combined without departing from the spirit of the present invention. Furthermore, the present invention is not limited to those having all the configurations described in the above-mentioned embodiment, and includes those in which some of the configurations are omitted. [Explanation of symbols]

[0055] 1. First housing 1a Convex part 1b Recess 2 Second housing (base part) 2a Inverter case (whole) 3 First magnetic body 4 Second magnetic body 5. Magnetic Sensor 6 AC Conductor 6a AC conductor wiring 7 Control signal input / output terminal 8 Magnetic detection board 8a through hole 9. Magnetic Flux 10 Induced current 11 Motor Current 12 Thickness in the direction of arrangement 13 Distance between the end of the magnetic material and the housing 14 Electronic Components 15 Magnetic convex part 17 Magnetic flux detection sensitivity correction section 18 Current calculation section 19 Speed ​​conversion section 20 Angle Sensor 21 Refrigerant inlet 22 DC input terminal 23 Coolant flow path 24 Main circuit section 25 Capacitor 26 IGBT element 27 Diode element 28 Insulating Materials 29 Creepage distance

Claims

1. An inverter circuit that converts direct current into alternating current; an AC conductor for transmitting the AC current; a magnetic sensor that detects a magnetic field generated when the AC current flows through the AC conductor; a first magnetic body and a second magnetic body that face each other with the AC conductor and the magnetic sensor interposed therebetween; a first housing and a second housing formed of a conductive member, the first housing and the second housing housing containing the AC conductor, the magnetic sensor, the first magnetic body, and the second magnetic body; the first housing and the second housing together constitute a housing in which a housing portion is formed to house the AC conductor, the magnetic sensor, the first magnetic body, and the second magnetic body; the first housing covers one of the openings in a space between the first magnetic body and the second magnetic body; the second housing covers the other opening of the space, each end of the first magnetic body and the second magnetic body is formed such that a distance from the end to the first housing or the second housing is smaller than a thickness of the first magnetic body and the second magnetic body in an arrangement direction of the first magnetic body and the second magnetic body; the first magnetic body and the second magnetic body each have a magnetic convex portion facing each other, The extension lines of the respective convex portions of the magnetic material convex portions are formed closer to the first housing and the second housing than the upper surface of the magnetic sensor and the lower surface of the AC conductor. Power conversion equipment.

2. An inverter circuit for converting direct current into alternating current; an AC conductor for transmitting the AC current; a magnetic sensor that detects a magnetic field generated when the AC current flows through the AC conductor; a first magnetic body and a second magnetic body that face each other with the AC conductor and the magnetic sensor interposed therebetween; a first housing and a second housing formed of a conductive member, the first housing and the second housing housing containing the AC conductor, the magnetic sensor, the first magnetic body, and the second magnetic body; the first housing and the second housing together constitute a housing in which a housing portion is formed to house the AC conductor, the magnetic sensor, the first magnetic body, and the second magnetic body; the first housing covers one of the openings in a space between the first magnetic body and the second magnetic body; the second housing covers the other opening of the space, each end of the first magnetic body and the second magnetic body is formed such that a distance from the end to the first housing or the second housing is smaller than a thickness of the first magnetic body and the second magnetic body in an arrangement direction of the first magnetic body and the second magnetic body; a magnetic detection substrate on which the magnetic sensor is disposed, The first magnetic body and the second magnetic body have a magnetic convex portion, The magnetic convex portion fixes the first magnetic body and the second magnetic body to the magnetic detection substrate. Power conversion equipment.

3. An inverter circuit for converting direct current into alternating current; an AC conductor for transmitting the AC current; a magnetic sensor that detects a magnetic field generated when the AC current flows through the AC conductor; a first magnetic body and a second magnetic body that face each other with the AC conductor and the magnetic sensor interposed therebetween; a first housing and a second housing formed of a conductive member, the first housing and the second housing housing containing the AC conductor, the magnetic sensor, the first magnetic body, and the second magnetic body; the first housing and the second housing together constitute a housing in which a housing portion is formed to house the AC conductor, the magnetic sensor, the first magnetic body, and the second magnetic body; the first housing covers one of the openings in a space between the first magnetic body and the second magnetic body; the second housing covers the other opening of the space, each end of the first magnetic body and the second magnetic body is formed such that a distance from the end to the first housing or the second housing is smaller than a thickness of the first magnetic body and the second magnetic body in an arrangement direction of the first magnetic body and the second magnetic body; a speed conversion unit that converts a rotor position signal output from an angle sensor connected to a rotor of the motor into an angular velocity; a magnetic flux detection sensitivity correction unit that corrects a magnetic flux detection value output by the magnetic sensor, The magnetic flux detection sensitivity correction unit corrects the magnetic flux detection value based on the magnetic flux detection value output from the magnetic sensor, the angular velocity output from the velocity conversion unit, and a preset relationship between the angular velocity and the magnetic flux detection sensitivity. Power conversion equipment.

4. The power conversion device according to any one of claims 1 to 3, the first housing has a protrusion formed on a surface facing the second housing so as to protrude toward the second housing, The magnetic sensor, the first magnetic body, the second magnetic body, and the AC conductor are disposed between the protrusion and the second housing. Power conversion equipment.

5. The power conversion device according to any one of claims 1 to 3, the first housing has a recess formed on a surface facing the second housing and recessed in a direction away from the second housing, The magnetic sensor, the first magnetic body, the second magnetic body, and the AC conductor are disposed between the recess and the second housing. Power conversion equipment.

6. The power conversion device according to claim 1 or 3, a magnetic detection substrate on which the magnetic sensor is disposed, the AC conductor is formed of a wiring provided on the magnetic detection substrate, The magnetic sensor is disposed on a surface of the magnetic detection board on which the AC conductor is not disposed. Power conversion equipment.

7. A power conversion device as claimed in claim 2, the AC conductor is formed of a wiring provided on the magnetic detection substrate, The magnetic sensor is disposed on a surface of the magnetic detection board on which the AC conductor is not disposed. Power conversion equipment.

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