WO2024209627A1 - 回転電機の固定子 - Google Patents

回転電機の固定子 Download PDF

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Publication number
WO2024209627A1
WO2024209627A1 PCT/JP2023/014245 JP2023014245W WO2024209627A1 WO 2024209627 A1 WO2024209627 A1 WO 2024209627A1 JP 2023014245 W JP2023014245 W JP 2023014245W WO 2024209627 A1 WO2024209627 A1 WO 2024209627A1
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WO
WIPO (PCT)
Prior art keywords
hole
flat conductor
protrusion
temperature sensor
conductor
Prior art date
Application number
PCT/JP2023/014245
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English (en)
French (fr)
Japanese (ja)
Inventor
和也 安井
元彦 山田
数馬 金田
秀範 内田
佳弘 栗原
義浩 五十嵐
Original Assignee
株式会社 東芝
東芝インフラシステムズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社 東芝, 東芝インフラシステムズ株式会社 filed Critical 株式会社 東芝
Priority to PCT/JP2023/014245 priority Critical patent/WO2024209627A1/ja
Priority to JP2024527552A priority patent/JPWO2024209627A1/ja
Publication of WO2024209627A1 publication Critical patent/WO2024209627A1/ja

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/25—Devices for sensing temperature, or actuated thereby

Definitions

  • An embodiment of the present invention relates to a stator for a rotating electrical machine.
  • One cooling method for preventing a rotating electric machine from overheating is to directly spray or drip coolant onto the conductor of the stator coil.
  • the conductor is directly covered with coolant. If coolant is applied to the conductor in this way, it may affect the accuracy of measuring the temperature of the conductor using a temperature sensor, for example.
  • the temperature sensor can be embedded inside the coil end to prevent the temperature sensor from being covered with coolant, thereby preventing a decrease in the accuracy of measuring the temperature.
  • the temperature sensor is placed on the surface part of the rectangular wire, so that the temperature sensor is directly covered with coolant, and there is a risk of a temperature difference occurring between the temperature sensor and the rectangular wire. Therefore, even in a rotating electric machine using a rectangular wire as the conductor, it is necessary to accurately monitor the temperature of the rectangular wire, which is the object of temperature measurement. For example, it is conceivable that the accuracy of monitoring the conductor temperature could be improved by processing the conductor into a special shape to attach a temperature sensor to improve temperature measurement accuracy, or by using a structure in which the temperature sensor is sandwiched between the conductors. However, these measures are unlikely to be adequate measures, as they may increase the amount of work required to process the conductors of the stator coil, or the temperature sensor may fall off due to vibration of the rotating electric machine.
  • the stator of the rotating electric machine of the embodiment includes a multi-phase coil wound around a stator core, a flat conductor connecting the individual coils of the multi-phase coils, and a temperature sensor for measuring the temperature of the flat conductor.
  • the flat conductor has a conductor portion whose overall length is greater than the plate thickness, and a through hole penetrating the conductor portion in the plate thickness direction.
  • the temperature sensor has a main body portion having a polyhedral shape elongated in a predetermined direction including a contact surface with the flat conductor, and a first protrusion portion protruding from the contact surface of the main body portion and inserted into the through hole.
  • the first protrusion portion has a root portion protruding from the contact surface at a height approximately equal to the plate thickness, and a tip portion that is continuous with the root portion and extends along the contact surface beyond the root portion to sandwich the conductor portion between the contact surface and the conductor portion around the through hole.
  • FIG. 1 is a longitudinal sectional view showing a portion divided in half along a central axis of a rotating electric machine according to a first embodiment
  • FIG. 1 is a diagram illustrating a temperature sensor according to a first embodiment.
  • FIG. 2 is a perspective view showing a manner in which a temperature sensor is attached to a flat conductor according to the first embodiment.
  • 3 is a schematic diagram showing, in partial cross section, how a temperature sensor is attached to a flat conductor according to the first embodiment;
  • FIG. FIG. 2 is a plan view showing a schematic configuration of a flat conductor according to the first embodiment;
  • FIG. 11 is a diagram illustrating the configuration of a case of a temperature sensor according to a second embodiment, viewed from a sixth surface side of a main body portion.
  • FIG. 1 is a longitudinal sectional view showing a portion divided in half along a central axis of a rotating electric machine according to a first embodiment;
  • FIG. 1 is a diagram illustrating a temperature sensor according
  • FIG. 13 is a diagram showing a state in which a protrusion of a case body of a temperature sensor according to a third embodiment is inserted into a through hole, as viewed from the rear side of a flat conductor;
  • FIG. 13 is a schematic diagram showing a state in which a protrusion portion of the case body of the temperature sensor according to the third embodiment is inserted into a through hole, viewed from the sixth surface side of the case body.
  • FIG. FIG. 13 is a diagram showing a state in which a temperature sensor is attached to a flat conductor according to a third embodiment, viewed from the rear side of the flat conductor.
  • FIG. 13 is a schematic view showing a state in which a temperature sensor is attached to a flat conductor according to the third embodiment, as viewed from a sixth surface side of a case main body;
  • FIG. 13 is a diagram illustrating a configuration of a case of a temperature sensor according to a modified example of the third embodiment, viewed from a sixth surface side of a main body portion.
  • FIG. 13 is a diagram illustrating a configuration of a case of a temperature sensor according to a modified example of the third embodiment, viewed from a fourth surface side of a main body portion.
  • FIG. 13 is a diagram illustrating a configuration of a case of a temperature sensor according to a modified example of the third embodiment, viewed from the first surface side of the main body portion.
  • FIG. 13 is a diagram illustrating the configuration of a case of a temperature sensor according to a fourth embodiment, viewed from the first surface side of a main body portion.
  • FIG. 13 is a diagram showing a state in which a temperature sensor is attached to a flat conductor according to a fourth embodiment, viewed from the rear side of the flat conductor.
  • FIG. 13 is a diagram showing a state in which a temperature sensor is attached to a flat conductor according to the fourth embodiment, viewed from the sixth surface side of the main body.
  • 13 is a diagram showing a state in which a temperature sensor is attached to a flat conductor according to a modified example of the fourth embodiment, viewed from the sixth surface side of the main body.
  • FIG. 13 is a plan view showing an example of a schematic configuration of a flat conductor having a widened portion near a through hole.
  • FIG. 13 is a plan view showing another example of a schematic configuration of a flat conductor having a widened portion near a through hole.
  • (First embodiment) 1 is a longitudinal cross-sectional view showing a part divided in half along a central axis of a rotating electric machine according to the present embodiment.
  • the rotating electric machine is used as a main motor, a drive motor, or a generator for a railroad car, a hybrid electric vehicle (HEV), an electric vehicle (EV), etc.
  • HEV hybrid electric vehicle
  • EV electric vehicle
  • the uses of the rotating electric machine are not limited to these, and the rotating electric machine can be used for other purposes as well.
  • the rotating electric machine 10 is configured as, for example, a permanent magnet type rotating electric machine.
  • the main elements of the rotating electric machine 10 are a cylindrical stator 12, a rotor 14 supported inside the stator 12 so as to be rotatable about a central axis C1 and coaxially with the stator 12, and a casing 30 that supports the stator 12 and the rotor 14.
  • the direction along the central axis C1 about which the rotor 14 rotates in the rotating electric machine 10 is defined as the axial direction
  • the direction in which the rotor 14 rotates about the central axis C1 is defined as the circumferential direction (rotation direction).
  • the direction perpendicular to the axial direction and the circumferential direction is defined as the radial direction, and the side approaching the central axis C1 in the radial direction is defined as the inner side, and the side moving away from the central axis C1 is defined as the outer side.
  • the stator 12 includes a cylindrical stator core 16 and a stator winding (hereinafter referred to as a coil) 18 wound around the stator core 16.
  • the stator core 16 is formed by stacking a number of annular electromagnetic steel sheets 17 made of a magnetic material, such as silicon steel, concentrically.
  • the electromagnetic steel sheets 17 are connected to each other in a stacked state by welding a number of points on the outer circumferential surface of the stator core 16.
  • the stator core 16 has one end face 16a located at one end in the axial direction, and the other end face 16b located at the other end in the axial direction.
  • the one end face 16a and the other end face 16b extend perpendicular to the central axis C1.
  • core end plates 21 having approximately the same cross-sectional shape as the stator core 16 are provided.
  • stator core holders 22a, 22b are provided on the core end plates 21.
  • the inner periphery of the stator core 16 is formed with a plurality of teeth 23 that protrude toward the central axis C1.
  • the teeth 23 are arranged at equal intervals along the circumferential direction.
  • the gaps between adjacent teeth 23 in the circumferential direction are each configured as a slot 24.
  • the teeth 23 are formed between adjacent slots 24 in the circumferential direction.
  • These multiple slots 24 open to the inner periphery of the stator 12, and ultimately the stator core 16.
  • the teeth 23 and slots 24 each extend in the axial direction. They extend over the entire axial length of the stator core 16.
  • One end of each slot 24 opens to one end face 16a, and the other end opens to the other end face 16b.
  • the stator core 16 integrally has a circular yoke portion and a plurality of teeth 23 that protrude radially from the inner periphery of the yoke portion toward the central axis C1.
  • a coil 18 is inserted into each slot 24.
  • the coil 18 inserted into the slot 24 is wound around each tooth 23.
  • the coil 18 has coil ends 18a, 18b that extend axially beyond one end face 16a and the other end face 16b of the stator core 16.
  • a predetermined interlinkage magnetic flux is formed in the stator 12 (teeth 23).
  • the rotor 14 has a cylindrical shaft (rotating shaft) 42 supported by the first and second bearings 36, 38 so as to be rotatable about the central axis C1, a cylindrical rotor core 44 fixed to the approximate axial center of the shaft 42, and a plurality of permanent magnets 46 embedded in the rotor core 44.
  • the rotor core 44 is formed by stacking a number of annular electromagnetic steel sheets 47 made of a magnetic material, such as silicon steel, concentrically.
  • the rotor core 44 has an inner hole 48 formed concentrically with the central axis C1.
  • the shaft 42 is inserted and fitted into the inner hole 48 and extends concentrically with the rotor core 44.
  • An approximately disk-shaped magnetic shielding plate 54 and a rotor core presser 56 are provided at both axial ends of the rotor core 44.
  • the axial length of the rotor core 44 is approximately equal to the axial length of the stator core 16.
  • the rotor core 44 is arranged concentrically with the stator core 16 with a small gap (air gap) inside the rotor core 16.
  • the outer peripheral surface of the rotor core 44 faces the inner peripheral surface of the stator core 16 (the tip surfaces of the teeth 23) with a small gap.
  • the rotor core 44 is formed with a number of magnet embedding holes 49 that penetrate in the axial direction.
  • a permanent magnet 46 is loaded and positioned inside each magnet embedding hole 49.
  • the permanent magnets 46 loaded into the magnet embedding holes 49 are fixed to the magnet embedding holes 49, for example, by adhesive.
  • Each permanent magnet 46 extends over the entire length of the rotor core 44.
  • the multiple permanent magnets 46 are also arranged at predetermined intervals in the circumferential direction of the rotor core 44.
  • the casing 30 has a first bracket 32a that is substantially cylindrical and a second bracket 32b that is bowl-shaped.
  • the first bracket 32a is connected to the stator core retainer 22a located on the driving end side of the stator core 16.
  • the second bracket 32b is connected to the stator core retainer 22b located on the non-driving end side.
  • the first and second brackets 32a, 32b are formed of, for example, an aluminum alloy.
  • An annular bearing bracket 34 is concentrically fastened to the tip side of the first bracket 32a with bolts.
  • a first bearing portion 36 incorporating, for example, a roller bearing 35 is fastened to the center of the bearing bracket 34.
  • a second bearing portion 38 incorporating, for example, a ball bearing 37 is fastened to the center of the second bracket 32b.
  • the coil 18 is a flat conductor (flat wire) made of, for example, copper, with a rectangular cross section perpendicular to the longitudinal direction.
  • the coil 18 is constructed using multiple coil segments formed into a roughly U-shape, for example by cutting and bending a flat wire, and is assembled to the stator core 16.
  • the coil segments for example, face each other at a distance, and integrally include a pair of linear portions, each having an inclined surface at one end that is inclined relative to the longitudinal direction, and a bridging portion that connects the other ends of the linear portions.
  • the outer surface of the coil segment is covered with an insulating coating such as enamel. One end (extending end) of each linear portion has the insulating coating removed, making it conductive.
  • a pair of linear portions of each coil segment is inserted, for example, from one end face 16a of the stator core 16 into different corresponding slots 24 so that they protrude a predetermined length from the other end face 16b of the stator core 16.
  • the linear portions protruding from the other end face 16b are bent along the circumferential direction of the stator core 16 and extend at an angle to the axial direction. These extending portions form coil ends 18b protruding from the other end face 16b.
  • each coil segment face one end face 16a of the stator core 16 with a small gap between them.
  • the bridge portions extend roughly along the circumferential direction of the stator core 16. These bridge portions form coil ends 18a that protrude from one end face 16a.
  • the flat conductor 20 is a member for electrically connecting the other ends of the coils 18 of each phase to each other and forming a circuit of the rotating electric machine 10 having multiple phases.
  • the flat conductor 20 is formed, for example, by performing cutting or bending on a single conductive metal plate member.
  • the flat conductor 20 is arranged, for example, in contact with the outer periphery of the coil end 18b.
  • the flat conductor 20 has a shape including a flat portion (mounting surface 203) on which the temperature sensor 60 described later is attached.
  • the flat conductor 20 may have such a flat portion in part and may be entirely curved or bent along the outer periphery of the coil end 18b, or may be entirely flat.
  • a temperature sensor 60 for measuring the temperature of the flat conductor 20 is attached to the flat conductor 20.
  • Fig. 2 is a diagram showing a schematic diagram of the temperature sensor 60.
  • the temperature sensor 60 has a temperature sensing element 61 and a case 62.
  • the temperature-sensing element 61 is, for example, a thermistor whose electrical resistance changes depending on temperature.
  • the temperature-sensing element 61 is connected to a control unit (not shown) of the rotating electric machine 10 via lead wires 63. A current flows through the lead wires 63 according to the change in resistance value of the temperature-sensing element (thermistor) 61.
  • the control unit of the rotating electric machine 10 detects the current flowing through the lead wires 63 to identify the temperature of the flat conductor 20, and identifies the temperature of the coil 18 from the identified temperature of the flat conductor 20. In this way, the control unit controls the current supplied to the coil 18 based on, for example, the temperature of the coil 18, and prevents damage to the stator core 16 and the like caused by heat generation from the coil 18.
  • the case 62 is made of a material having thermal conductivity and elasticity, and is a member that defines the outer periphery of the temperature sensor 60. Specifically, the case 62 needs only to cover the entire temperature sensor 61 so that the temperature of the flat conductor 20 can be transferred to the temperature sensor 61 through the case 62.
  • the case 62 has a space inside and is configured to accommodate the temperature sensor 61 in the space. A portion of the lead wire 63 is accommodated in the internal space of the case 62 together with the temperature sensor 61, and the remaining portion is exposed from the internal space to the outside through an opening in the case 62.
  • the inside of the case 62 is filled with a heat-conducting adhesive or the like.
  • the temperature sensor 61 and the lead wire 63 are fixed at a predetermined position in the internal space of the case 62.
  • the case 62 may be solid with a hole that communicates with the outside, and the temperature sensor 61 may be inserted into the hole and accommodated. In this configuration, a portion of the lead wire 63 is inserted into the hole along with the temperature sensor 61, and the remaining portion is exposed to the outside from the hole.
  • FIGS. 3 and 4 show an example of an attachment mode of the temperature sensor 60 to the flat conductor 20.
  • FIG. 3 is a perspective view showing such an attachment mode.
  • FIG. 4 is a schematic diagram showing such an attachment mode.
  • the case 62 has the following configuration so that it can be attached to the flat conductor 20 in the attachment mode shown in FIGS. 3 and 4. As shown in FIGS. 2 to 4, the case 62 has a main body 621 and two protrusions 622, 623.
  • the main body 621 has a polyhedral shape including a contact surface with the flat conductor 20, and has a space inside to accommodate the temperature sensor 61 and the lead wire 63.
  • the main body 621 has a roughly rectangular parallelepiped shape extending along the wiring direction of the lead wire 63.
  • the opposing first surface S1 and second surface S2 are surfaces that are roughly parallel to the mounting surface 203 of the flat conductor 20 described below.
  • the first surface S1 is the contact surface with the mounting surface 203
  • the second surface S2 is the outer surface of the case 62, and ultimately the outer surface of the temperature sensor 60.
  • the third surface S3, fourth surface S4, fifth surface S5, and sixth surface S6 are surfaces that stand between the first surface S1 and the second surface S2 and face different directions.
  • the opposing third surface S3 and fourth surface S4 are surfaces that span between the short sides of the first surface S1 and second surface S2.
  • the third surface S3 is the surface on the exposed (pulled-out) side of the lead wire 63 in the longitudinal direction of the main body 621, and the fourth surface S4 is the surface on the opposite side.
  • the opposing fifth surface S5 and sixth surface S6 are surfaces that span between the long sides of the first surface S1 and second surface S2, and also span between the short sides of the third surface S3 and fourth surface S4.
  • the separation distance D1 between the temperature sensor 61 and the first surface S1 is shorter than the separation distance D2 between the temperature sensor 61 and the second surface S2.
  • the separation distance D1 is shorter than each of the separation distances (not shown) between the temperature sensor 61 and the third surface S3, the fourth surface S4, the fifth surface S5, and the sixth surface S6.
  • the separation distance D1 between the temperature sensor 61 and the first surface S1 is the shortest.
  • the separation distances between the temperature sensor 61 and each of the surfaces S1 to S6 are defined as the shortest distances between the temperature sensor 61 and each of the surfaces S1 to S6.
  • the temperature sensor 61 when viewed in the direction of the distance between the first surface S1 and the second surface S2 (the vertical direction in Figure 4), the temperature sensor 61 is positioned so as not to overlap with the through hole 202 (described later) of the flat conductor 20.
  • the temperature sensor 60 when the temperature sensor 60 is attached to the flat conductor 20 as shown in Figures 3 and 4, when viewed in the direction of the distance between the first surface S1 and the second surface S2, the temperature sensor 61 is positioned so as to overlap with the conductor portion 201 (the portion other than the through hole 202) of the flat conductor 20.
  • the two protrusions 622, 623 are provided on the first surface S1 of the main body 621 and protrude substantially perpendicularly thereto, and are inserted into the through hole 202 of the flat conductor 20.
  • the two protrusions 622, 623 may be solid or hollow.
  • One of the two protrusions 622, 623 (hereinafter referred to as the first protrusion 622) is disposed closer to the fourth surface S4 in the longitudinal direction of the main body 621, and the other (hereinafter referred to as the second protrusion 623) is disposed closer to the third surface S3 in the longitudinal direction.
  • the longitudinal direction of the main body 621 is the direction of the distance between the third surface S3 and the fourth surface S4, and corresponds to the wiring direction of the lead wire 63 when the temperature sensor 61 is housed in the case 62.
  • the first protrusion 622 and the second protrusion 623 are positioned apart by a predetermined distance L1.
  • the distance L1 is the distance along the longitudinal direction of the main body 621 between the end 622p of the first protrusion 622 on the fourth surface S4 side and the end 623p of the second protrusion 623 on the third surface S3 side.
  • the distance L1 is the length of a straight line connecting the points (ends 622p, 623p) where the first protrusion 622 and the second protrusion 623 are furthest apart in the longitudinal direction of the main body 621.
  • the distance L1 corresponds to the distance between the points (ends 622p, 623p) where the first protrusion 622 and the second protrusion 623 are furthest apart in the longitudinal direction of the main body 621.
  • the first protrusion 622 has a root portion 624 which corresponds to the root of the protrusion, and a tip portion 625 which corresponds to the tip of the protrusion.
  • the root portion 624 is connected to the first surface S1 of the main body portion 621 and protrudes approximately perpendicularly from the first surface S1.
  • the tip portion 625 is continuous with the root portion 624 and is extended further than the root portion 624 along the first surface S1, i.e., the contact surface with the flat conductor 20 in the temperature sensor 60.
  • the tip portion 625 protrudes further than the root portion 624 approximately parallel to the first surface S1 in order to sandwich the conductor portion 201 between the first surface S1 and the tip portion 625 around the through hole 202.
  • the root portion 624 is in the shape of a rectangular parallelepiped that is elongated in the direction of the distance between the third surface S3 and the fourth surface S4, in other words, along the longitudinal direction of the main body portion 621.
  • the height of the root portion 624 is equal to or greater than the plate thickness of the flat conductor 20 (the dimension shown by D in FIG. 4, hereinafter referred to as plate thickness D), and in this embodiment, is approximately equal to the plate thickness D, as an example.
  • the height of the root portion 624 is the dimension in the direction of the distance between the first surface S1 and the second surface S2, in other words, the protruding dimension from the first surface S1 in the normal direction of the first surface S1.
  • the height of the root portion 624 corresponds to the distance between the first surface S1 and the tip portion 625. In other words, the root portion 624 creates a gap between the first surface S1 and the tip portion 625 by its height.
  • the tip 625 has a flat shape with the width of the base 624 expanded.
  • the width of the base 624 is the dimension in the direction of the distance between the fifth surface S5 and the sixth surface S6, in other words, the longitudinal dimension of the main body 621.
  • the dimension in the direction of the distance between the third surface S3 and the fourth surface S4 and the dimension in the direction of the distance between the fifth surface S5 and the sixth surface S6 are longer than the dimension in the direction of the distance between the first surface S1 and the second surface S2, and shorter than the distance between the fifth surface S5 and the sixth surface S6 (surface-to-surface distance).
  • planar figure of the tip 625 is similar to the opening of the first hole 205 of the flat conductor 20 described later, but smaller than the opening of the opening, and is sized to be insertable into the first hole 205.
  • the plan view of the tip 625 is the outline of the shape of the tip 625 projected onto a plane parallel to the first surface S1 from the direction of the distance between the first surface S1 and the second surface S2, and in the example shown in FIG. 2, it is rectangular.
  • the second protrusion 623 has a shape in which a long, approximately rectangular parallelepiped is tapered toward the protruding end along the longitudinal direction of the main body 621.
  • the protruding end of the second protrusion 623 is a tip in the normal direction rising from the first surface S1 of the main body 621.
  • the second protrusion 623 has a tapered shape with the part on the third surface S3 side rising approximately perpendicular to the first surface S1 and the part on the fourth surface S4 side inclined relative to the first surface S1.
  • the protruding end of the second protrusion 623 is a flat surface approximately parallel to the first surface S1.
  • the height of the second protrusion 623 is equal to or less than the height of the base portion 624 of the first protrusion 622.
  • the height of the second protrusion 623 is the dimension in the direction of the distance between the first surface S1 and the second surface S2, in other words, the protruding dimension from the first surface S1 in the normal direction of the first surface S1.
  • the height of the second protrusion 623 is approximately equal to the depth of the through hole 202 of the flat conductor 20 described below, that is, the plate thickness D of the flat conductor 20.
  • the planar figure of the second protrusion 623 is similar to the opening of the first hole 205 of the flat conductor 20 but smaller than the opening, and is sized to be insertable into the first hole 205.
  • the planar figure of the second protrusion 623 is the outline of the shape of the second protrusion 623 projected onto a plane parallel to the first surface S1 from the direction of the distance between the first surface S1 and the second surface S2.
  • FIG. 5 is a plan view showing the schematic configuration of the flat conductor 20.
  • the flat conductor 20 has a conductor portion 201 and a through hole 202 for mounting the temperature sensor 60.
  • the conductor portion 201 is a conductor portion for electrically connecting the coils 18 of each phase, and is in the form of a (longitudinal) band of a constant width whose overall length is sufficiently larger than the plate thickness D.
  • the through hole 202 penetrates the flat conductor 20 in the plate thickness direction from the mounting surface 203 to the back surface 204 of the flat conductor 20. Therefore, in the flat conductor 20, the conductor portion 201 expands to avoid the through hole 202.
  • the mounting surface 203 of the flat conductor 20 is the surface on which the temperature sensor 60 is mounted, more specifically, a flat surface that contacts the first surface S1 of the main body portion 621 of the case 62 when the temperature sensor 60 is mounted.
  • the back surface 204 is a flat surface on the opposite side to the mounting surface 203 and approximately parallel to the mounting surface 203, and is a surface that faces the outer periphery of the coil end 18b.
  • the plate thickness direction of the flat conductor 20 is the direction of the distance between the mounting surface 203 and the back surface 204.
  • the through hole 202 has two hole portions with different opening shapes, a first hole portion 205 and a second hole portion 206.
  • the first hole portion 205 and the second hole portion 206 are arranged continuously in the longitudinal direction of the flat conductor 20 to form a single through hole 202.
  • the through hole 202 has a form in which the first hole portion 205 and the second hole portion 206 are continuously connected to form a single opening.
  • the through hole 202 is open over a predetermined distance (hereinafter referred to as the opening length) L2.
  • the opening length L2 is the distance along the longitudinal direction of the flat conductor 20 between the end 207 of the first hole portion 205 and the end 208 of the second hole portion 206.
  • the opening length of the first hole portion 205 is L21
  • the opening length of the second hole portion 206 is L22.
  • the opening length L21 is shorter than the opening length L22.
  • the end 207 of the first hole portion 205 is the opening edge portion on the opposite side of the first hole portion 205 from the continuous side with the second hole portion 206.
  • the end 208 of the second hole portion 206 is the opening edge portion on the opposite side of the second hole portion 206 from the continuous side with the first hole portion 205.
  • the opening length L2 is the distance (length) of a straight line connecting the opening edge portions (ends 207, 208) at which the first hole portion 205 and the second hole portion 206 are furthest apart in the longitudinal direction of the flat conductor 20.
  • the opening length L2 corresponds to the distance between the points at which the first hole portion 205 and the second hole portion 206 are furthest apart in the longitudinal direction of the flat conductor 20.
  • the opening length L2 is approximately equal to the separation distance L1 between the first protrusion 622 and the second protrusion 623 of the case 62. Therefore, when the longitudinal direction of the flat conductor 20 and the longitudinal direction of the main body 621 are aligned, the points at which the first hole 205 and the second hole 206 are furthest apart in the longitudinal direction are positioned approximately the same distance apart as the points at which the first protrusion 622 and the second protrusion 623 are furthest apart.
  • the opening shape of the first hole 205 is a rectangle similar to the planar figure of the tip 625 of the first protrusion 622.
  • the size of the opening of the first hole 205 is one size larger than the planar figure of the tip 625, and is large enough to allow the tip 625 to be inserted.
  • the opening shape of the second hole 206 is a rectangle elongated in the direction of the opening length L2.
  • the opening width W2 of the second hole 206 is narrower than the opening width W1 of the first hole 205.
  • the temperature sensor 60 can be attached to the flat conductor 20, for example, by following the steps below.
  • the temperature sensor 60 When mounting, first, the first surface S1 of the main body 621 is placed facing the mounting surface 203 of the flat conductor 20, and the temperature sensor 60 is positioned so that the longitudinal direction of the main body 621 coincides with the longitudinal direction of the flat conductor 20. Next, the tip 625 of the first protrusion 622 is inserted into the first hole 205. At that time, the temperature sensor 60 is tilted so that the second protrusion 623 is slightly raised from the mounting surface 203 of the flat conductor 20. In this state, the root 624 of the first protrusion 622 is inserted from the first hole 205 into the second hole 206, and the opening edge of the second hole 206 is sandwiched between the tip 625 and the first surface S1. In this state, the temperature sensor 60 is moved (slid) along the second hole 206 until the root 624 hits the end 208 of the second hole 206. Then, insert the second protrusion 623 into the first hole 205.
  • the opening length L2 between the ends 207, 208 of the first hole 205 and the second hole 206 is approximately equal to the separation distance L1 between the first protrusion 622 and the second protrusion 623 of the case 62. Therefore, in the longitudinal direction of the main body 621, the temperature sensor 60 is in a state where the root 624 abuts against the end 208 of the second hole 206 and the second protrusion 623 abuts against the end 207 of the first hole 205. As a result, the root 624 and the second protrusion 623 are in a tensioned state between the ends 207, 208, and the temperature sensor 60 is positioned and fixed relative to the flat conductor 20.
  • either the base portion 624 or the second protrusion 623, or both can be inserted into the through hole 202 (the first hole portion 205 and the second hole portion 206) in an elastically deformed state so as to press the ends 207, 208 in the longitudinal direction of the flat conductor 20.
  • the second protrusion 623 may be arranged so that the separation distance L1 is slightly smaller than the opening length L2.
  • the tip portion 625 of the first protrusion 622 interferes with (gets caught on) the opening edge of the second hole portion 206, so that the temperature sensor 60 is prevented from falling out of the through hole 202 in the plate thickness direction of the flat conductor 20, in other words, in the insertion direction of the tip portion 625 and the second protrusion 623 into the first hole portion 205.
  • the temperature sensor 60 is provided with protrusions 622, 623, and the flat conductor 20 is provided with a through hole 202, making it possible to attach the temperature sensor 60 to the flat conductor 20 with a simple structure. Therefore, even if a rectangular wire is used as the conductor of the coil 18, the temperature of the coil 18 can be measured with high accuracy without increasing the amount of processing work required for the rectangular wire or causing the temperature sensor 60 to fall off. This makes it possible to appropriately control the current supplied to the coil 18 based on the temperature of the coil 18, for example, and prevents damage to the stator core 16, etc. caused by heat generation from the coil 18.
  • the temperature sensor 61 of the temperature sensor 60 is housed in a case 62. Therefore, even if, for example, coolant is directly sprayed or dripped onto the coil 18 to prevent the rotating electric machine 10 from overheating, the coolant is not directly sprayed or dripped onto the temperature sensor 61 of the temperature sensor 60. This improves the temperature measurement accuracy of the temperature sensor 60.
  • the temperature sensor 61 is arranged relatively close to the flat conductor 20 (specifically the first surface S1) that is the object of temperature measurement in this heat path. This allows the temperature of the flat conductor 20 to be appropriately measured by the temperature sensor 61 while suppressing the effect of a drop in temperature of the second surface S2 due to the spraying of cooling liquid, etc.
  • the temperature sensor 61 is positioned so as to overlap the conductor portion 201 of the flat conductor 20 without overlapping the through hole 202 when viewed from the direction of the distance between the first surface S1 and the second surface S2. Therefore, the heat transfer path from the flat conductor 20 does not have to detour around the through hole 202, and the temperature of the flat conductor 20 can be measured by the temperature sensor 61 via the shortest heat transfer path. Therefore, from this perspective as well, it is possible to properly measure the temperature of the flat conductor 20.
  • the shape of the temperature sensor and the flat conductor that are the same as or similar to the temperature sensor 60 and the flat conductor 20 of the first embodiment will be given the same reference numerals in the drawings and the description will be omitted or simplified.
  • Fig. 6A is a diagram showing the configuration of the case 62a of the temperature sensor 60 according to the second embodiment, as viewed from the sixth surface S6 side.
  • Fig. 6B is a diagram showing the configuration of the case 62a of the temperature sensor 60 according to the second embodiment, as viewed from the fourth surface S4 side.
  • the protrusion corresponding to the second protrusion 623 is omitted, and the case 62a has only the protrusion 622a corresponding to the first protrusion 622.
  • the tip portion 625a is continuous with the base portion 624a and protrudes from the base portion 624a approximately parallel to the first surface S1.
  • the size of the plan view of the tip portion 625a is smaller than the opening of the first hole portion 205 of the flat conductor 20, and is large enough to be inserted into the first hole portion 205.
  • the plan view of the tip portion 625a is the outline of the shape of the tip portion 625a projected onto a plane parallel to the first surface S1 from the direction of the distance between the first surface S1 and the second surface S2, and forms a rectangle similar to the opening shape of the first hole portion 205 of the flat conductor 20.
  • the tip portion 625a has a first flat portion 71a, a second flat portion 72a, and a tapered portion 73a.
  • the first flat portion 71a and the second flat portion 72a are portions that protrude from the base portion 624a approximately parallel to the first surface S1, and have flat surfaces 74a, 75a that face each other approximately parallel to the first surface S1.
  • the first flat portion 71a is disposed closer to the fourth surface S4 in the longitudinal direction of the main body portion 621 at the tip portion 625a.
  • the second flat portion 72a is disposed closer to the third surface S3 in the longitudinal direction of the main body portion 621 at the tip portion 625a.
  • the tapered portion 73a is interposed between the first flat portion 71a and the second flat portion 72a in the longitudinal direction of the main body portion 621.
  • the tapered portion 73a is a portion that connects the first flat portion 71a and the second flat portion 72a in a tapered shape, and has an inclined surface 76a that faces the first surface S1.
  • the inclined surface 76a connects the flat surface (first flat surface) 74a of the first flat portion 71a to the flat surface (second flat surface) 75a of the second flat portion 72a.
  • the opposing distance B1 between the first surface S1 and the flat surface 74a is larger than the opposing distance B2 between the first surface S1 and the flat surface 75a.
  • the total length L3 of the tip 625a in the longitudinal direction of the case 62 is equal to or less than the opening length L21 of the first hole 205 and equal to or less than the opening length L22 of the second hole 206.
  • the opening length L21 is shorter than the opening length L22, similar to the example shown in FIG. 5. That is, the total length L3 of the tip 625a is set so that the opening length of the first hole 205 falls within L21.
  • the total length L3 of the tip 625a is the distance along the longitudinal direction of the main body 621 between the end 78a on the fourth surface S4 side of the first flat portion 71a and the end 79a on the third surface S3 side of the second flat portion 72a.
  • the opposing distance B2 is approximately equal to the depth of the through hole 202 of the flat conductor 20 shown in FIG. 4, i.e., the plate thickness D of the flat conductor 20.
  • the opposing distance B1 is greater than the depth of the through hole 202 of the flat conductor 20 and greater than the plate thickness D of the flat conductor 20. Therefore, the opposing distance between the first surface S1 and the inclined surface 76a of the tapered portion 73a gradually narrows from the flat surface 74a toward the flat surface 75a.
  • the temperature sensor 60 When mounting, first, the first surface S1 of the main body 621 is placed facing the mounting surface 203 of the flat conductor 20, and the temperature sensor 60 is positioned so that the longitudinal direction of the main body 621 coincides with the longitudinal direction of the flat conductor 20. Next, the tip 625a of the protrusion 622a is inserted into the first hole 205. Then, the root 624a of the protrusion 622a is inserted from the first hole 205 into the second hole 206, and the opening edge of the second hole 206 is sandwiched between the tip 625a and the first surface S1. In this state, the temperature sensor 60 is moved (slid) along the second hole 206 until the root 624a hits the end 208 of the second hole 206. At that time, the protrusion 622a moves along the second hole 206 in the order of the first flat portion 71a, the tapered portion 73a, and the second flat portion 72a.
  • the opposing distance B1 between the first surface S1 and the first flat portion 71a is larger than the plate thickness D of the flat conductor 20, and the opposing distance B2 between the first surface S1 and the second flat portion 72a is approximately equal to the plate thickness D of the flat conductor 20.
  • the total length L3 of the tip portion 625a is equal to or less than the opening length L21 of the first hole portion 205 and equal to or less than the opening length L22 of the second hole portion 206.
  • the temperature sensor 60 is provided with a protrusion 622a, and the temperature sensor 60 can be attached to the flat conductor 20 with a simple structure in which a through hole 202 is provided in the flat conductor 20.
  • Fig. 7A is a diagram showing the configuration of the case 62b of the temperature sensor 60 according to this embodiment, as viewed from the sixth surface S6 side.
  • Fig. 7B is a diagram showing the configuration of the case 62b, as viewed from the fourth surface S4 side.
  • Fig. 7C is a diagram showing the configuration of the case 62b, as viewed from the first surface S1 side.
  • the protrusion corresponding to the second protrusion 623 is omitted, and the case 62b has only the protrusion 622b corresponding to the first protrusion 622.
  • the protrusion 622b has a base portion 624b which corresponds to the base portion of the protrusion, and a tip portion 625b which corresponds to the tip portion of the protrusion.
  • the root portion 624b is a portion that is connected to the first surface S1 of the main body portion 621 of the case 62b and protrudes from the first surface S1 substantially perpendicularly.
  • the height of the root portion 624b is the dimension in the direction of the distance between the first surface S1 and the second surface S2, in other words, the protruding dimension from the first surface S1 in the normal direction of the first surface S1, and is substantially equal to the plate thickness D of the flat conductor 20.
  • the root portion 624b has a shape that can rotate with respect to the flat conductor 20 around an axis along the direction of the distance between the first surface S1 and the second surface S2 (see FIGS. 8A, 8B, 9A, and 9B described later), that is, a shape that does not interfere with the peripheral surface of the through hole 202b (see FIGS. 8A and 8B described later) during rotation.
  • the root portion is a cylinder concentric with the axis during the rotation.
  • the root portion may be a square column or the like.
  • the shape of the cross section parallel to the first surface S1 of the base portion 624b i.e., the contact surface with the flat conductor 20 of the temperature sensor 60, is an approximately circular shape with a diameter shorter than the short side of the opening shape of the through hole 202b.
  • the shape of the cross section may be an approximately square shape with one side shorter than the short side of the opening shape of the through hole 202b.
  • the tip 625b is a portion that is continuous with the root 624b, extends more than the root 624b along the first surface S1, and protrudes more than the root 624b in a direction substantially parallel to the first surface S1.
  • the planar shape of the tip 625b is similar to the opening of the through hole 202b of the flat conductor 20 described later, but is smaller than the opening of the through hole 202b, and is sized to be insertable into the through hole 202b.
  • the planar shape of the tip 625b is the outline of the shape of the tip 625b projected onto a plane parallel to the first surface S1 from the direction of the distance between the first surface S1 and the second surface S2.
  • the planar shape in the example shown in Figures 7A, 7B, and 7C is a rectangle with its long sides in the direction of the distance between the fifth surface S5 and the sixth surface S6 of the main body 621 of the case 62b.
  • the tip portion 625b is spaced from the first surface S1 by the height of the base portion 624b in the direction of the distance between the first surface S1 and the second surface S2.
  • the opposing distance B3 between the first surface S1 and the tip portion 625b is approximately equal to the depth of the through hole 202b of the flat conductor 20, that is, the plate thickness D of the flat conductor 20 (see FIG. 9B described later).
  • FIGS. 8A, 8B, 9A, and 9B show the manner in which a temperature sensor 60 is attached to a flat conductor 20 according to the third embodiment.
  • FIGS. 8A and 8B show the initial state at the time of attachment.
  • FIGS. 9A and 9B show the state when attachment is completed.
  • the hole corresponding to the second hole 206 is omitted, and the flat conductor 20 has only the through hole 202b corresponding to the first hole 205.
  • the opening shape of the through hole 202b is a rectangle similar to the planar shape of the tip 625b of the protrusion 622b.
  • the opening shape in the example shown in Figures 8A and 9A is a rectangle elongated in the longitudinal direction of the flat conductor 20.
  • the size of the opening of the through hole 202b is one size larger than the planar shape of the tip 625b, and is large enough to allow the tip 625b to be inserted.
  • the shape of the cross section parallel to the first surface S1 of the tip portion 625b i.e., the contact surface with the flat conductor 20 of the temperature sensor 60, is a substantially rectangular shape having long and short sides with the following lengths.
  • the long side of this cross section is longer than the short side of the opening shape of the through hole 202b and shorter than the long side of the opening shape.
  • the short side of this cross section is shorter than the short side of the opening shape of the through hole 202b.
  • the temperature sensor 60 can be attached to the flat conductor 20, for example, by the following procedure.
  • Figure 8A is a schematic diagram showing the state in which the protrusion 622b is inserted into the through hole 202b from the rear surface 204 side of the flat conductor 20.
  • Figure 8B is a schematic diagram showing the state shown in Figure 8A from the sixth surface S6 side of the main body 621.
  • the root portion 624b is immersed in the through hole 202b, and the tip portion 625b passes through the through hole 202b and protrudes from the through hole 202b.
  • the main body 621 is rotated approximately 90° with respect to the flat conductor 20 about an axis along the direction of the distance between the first surface S1 and the second surface S2, specifically the base portion 624b, so that the longitudinal direction of the main body 621 and the longitudinal direction of the flat conductor 20, in other words the longitudinal direction of the opening shape of the through hole 202b, are aligned.
  • the main body 621 is positioned relative to the flat conductor 20 with the longitudinal direction of the planar figure of the tip 625b perpendicular to the longitudinal direction of the flat conductor 20.
  • the longitudinal direction of the first surface S1 of the tip 625b i.e., the cross section parallel to the contact surface of the temperature sensor 60 with the flat conductor 20, intersects with the longitudinal direction of the opening shape of the through hole 202b.
  • FIG. 9A is a schematic diagram showing the state in which the temperature sensor 60 is attached to the flat conductor 20, as viewed from the back surface 204 side of the flat conductor 20.
  • FIG. 9B is a schematic diagram showing the state in which the temperature sensor 60 is attached to the flat conductor 20, as viewed from the sixth surface S6 side of the main body 621.
  • the opposing distance B3 between the first surface S1 and the tip 625b is approximately equal to the plate thickness D of the flat conductor 20. Therefore, when the main body 621 is rotated approximately 90° with respect to the flat conductor 20 around an axis along the direction of the distance between the first surface S1 and the second surface S2, the main body 621 is in a state in which the opening edge of the through hole 202b of the flat conductor 20 is sandwiched between the first surface S1 and the tip 625b. As a result, the temperature sensor 60 is positioned and fixed relative to the flat conductor 20 in the longitudinal direction and plate thickness direction of the flat conductor 20. In this state, the temperature sensor 60 is attached to the flat conductor 20 with the longitudinal direction of the main body 621 aligned with the longitudinal direction of the flat conductor 20.
  • the temperature sensor 60 is provided with a protrusion 622b, and the temperature sensor 60 can be attached to the flat conductor 20 with a simple structure in which a through hole 202b is provided in the flat conductor 20.
  • the protrusion corresponding to the second protrusion 623 is omitted (FIGS. 7A, 7B, and 7C).
  • a protrusion corresponding to the second protrusion 623 may be provided in addition to the protrusion 622b.
  • Figures 10A, 10B, and 10C show a case 62b having a second protrusion 623b in addition to a protrusion 622b (hereinafter referred to as a first protrusion 622b) as a modified example of the third embodiment.
  • the case 62b has two protrusions, a first protrusion 622b and a second protrusion 623b.
  • the first protrusion 622b is disposed closer to the third surface S3 in the longitudinal direction of the main body 621, and the second protrusion 623b is disposed closer to the fourth surface S4 in the longitudinal direction.
  • the first protrusion 622b may be disposed closer to the fourth surface S4 in the longitudinal direction of the main body 621, and the second protrusion 623b may be disposed closer to the third surface S3 in the longitudinal direction.
  • the first protrusion 622b and the second protrusion 623b are positioned apart by a predetermined distance L4.
  • the distance L4 is the distance along the longitudinal direction of the main body 621 between the end 622q of the first protrusion 622b on the third surface S3 side and the end 623q of the second protrusion 623b on the fourth surface S4 side.
  • the distance L4 is the length of a straight line connecting the points (ends 622q, 623q) where the first protrusion 622b and the second protrusion 623b are furthest apart in the longitudinal direction of the main body 621.
  • the height of the second protrusion 623b is less than the depth of the second hole 206b of the flat conductor 20, which will be described later, i.e., the plate thickness D of the flat conductor 20. In the example shown in Figures 10A, 10B, and 10C, the height of the second protrusion 623b is smaller than the plate thickness D of the flat conductor 20.
  • the size of the planar figure of the second protrusion 623b is approximately equal to the opening shape of the second hole 206b of the flat conductor 20, and is large enough to fit into the second hole 206b.
  • the planar figure of the second protrusion 623b is the outline of the shape of the second protrusion 623b projected onto a plane parallel to the first surface S1 from the direction of the distance between the first surface S1 and the second surface S2.
  • FIGS. 11A and 11B show the manner in which a temperature sensor 60 is attached to a flat conductor 20 according to a modified example of the third embodiment.
  • the flat conductor 20 has two holes with different opening shapes, a first hole 205b and a second hole 206b.
  • the first hole 205b and the second hole 206b are spaced apart in the longitudinal direction of the flat conductor 20, and each forms an independent through hole.
  • the first hole portion 205b and the second hole portion 206b are arranged within the total length L5 of the main body portion 621 in the longitudinal direction. That is, the separation distance L6 between the first hole portion 205b and the second hole portion 206b is shorter than the total length L5 of the main body portion 621.
  • the total length L5 of the main body portion 621 is the distance (face-to-face distance) between the third surface S3 and the fourth surface S4.
  • the separation distance L6 between the first hole portion 205b and the second hole portion 206b is the distance along the longitudinal direction of the flat conductor 20 between the end portion 207b of the first hole portion 205b and the end portion 208b of the second hole portion 206b.
  • the end portion 207b of the first hole portion 205b is the opening edge portion on the opposite side of the longitudinal direction of the flat conductor 20 to the side on which the second hole portion 206b is arranged in the first hole portion 205b.
  • the end 208b of the second hole 206b is the opening edge of the second hole 206b on the opposite side to the arrangement side of the first hole 205b in the longitudinal direction of the flat conductor 20.
  • the separation distance L6 corresponds to the distance between the points where the first hole 205b and the second hole 206b are furthest apart in the longitudinal direction of the flat conductor 20.
  • the opposing distance L7 (see FIG. 10A) between the first protrusion 622b and the second protrusion 623b in the longitudinal direction is longer than the arrangement distance L8 between the first hole 205b and the second hole 206b.
  • the opposing distance L7 between the first protrusion 622b and the second protrusion 623b is the distance along the longitudinal direction of the main body 621 between the end 622p of the first protrusion 622b on the fourth surface S4 side and the end 623p of the second protrusion 623b on the third surface S3 side.
  • the opposing distance L7 is the length of a straight line connecting the points (ends 622p, 623p) where the first protrusion 622b and the second protrusion 623b are closest to each other in the longitudinal direction of the main body 621.
  • the arrangement interval L8 between the first hole portion 205b and the second hole portion 206b is the distance along the longitudinal direction of the flat conductor 20 between the end portion 209b of the first hole portion 205b and the end portion 210b of the second hole portion 206b.
  • the end portion 209b of the first hole portion 205b is the opening edge portion on the arrangement side of the second hole portion 206b in the first hole portion 205b in the longitudinal direction of the flat conductor 20.
  • the end portion 210b of the second hole portion 206b is the opening edge portion on the arrangement side of the first hole portion 205b in the second hole portion 206b in the longitudinal direction of the flat conductor 20.
  • the temperature sensor 60 can be attached to the flat conductor 20, for example, by the following procedure.
  • the first surface S1 of the main body 621 is placed facing the mounting surface 203 of the flat conductor 20, and the temperature sensor 60 is positioned so that the longitudinal direction of the main body 621 is perpendicular to the longitudinal direction of the flat conductor 20.
  • the first protrusion 622b is inserted into the first hole 205b. From this state, as with the arrow A8 shown in FIG. 8A, the main body 621 is rotated approximately 90° relative to the flat conductor 20 around an axis along the direction of the distance between the first surface S1 and the second surface S2, in short, the base portion 624b, so that the longitudinal direction of the main body 621 and the longitudinal direction of the flat conductor 20 coincide.
  • FIG. 11A is a schematic diagram showing the state in which the temperature sensor 60 is attached to the flat conductor 20 from the rear surface 204 side of the flat conductor 20.
  • FIG. 11B is a schematic diagram showing the state in which the temperature sensor 60 is attached to the flat conductor 20 from the sixth surface S6 side of the main body 621.
  • the opposing distance B3 between the first surface S1 and the tip portion 625b is approximately equal to the plate thickness D of the flat conductor 20.
  • the opposing distance L7 between the protrusions 622b and 623b is longer than the arrangement distance L8 between the holes 205b and 206b. Therefore, when the main body 621 is rotated approximately 90° with respect to the flat conductor 20 around an axis along the direction of the distance between the first surface S1 and the second surface S2, the main body 621 is in a state in which the opening edge of the through hole 202b of the flat conductor 20 is sandwiched between the first surface S1 and the tip portion 625b.
  • the main body 621 is in a state in which the second protrusion 623b is fitted into the second hole portion 206b.
  • the temperature sensor 60 is positioned and fixed with respect to the flat conductor 20 in the longitudinal direction and plate thickness direction of the flat conductor 20. In this state, the temperature sensor 60 is attached to the flat conductor 20 with the longitudinal direction of the main body 621 aligned with the longitudinal direction of the flat conductor 20.
  • the temperature sensor 60 can be attached to the flat conductor 20 with a simple structure in which the temperature sensor 60 is provided with protrusions 622b, 623b and the flat conductor 20 is provided with holes 205b, 206b.
  • Fourth Embodiment 12A, 12B, and 12C are schematic diagrams showing the configuration of the case 62c of the temperature sensor 60 according to the fourth embodiment.
  • Fig. 12A is a diagram showing the configuration of the case 62c of the temperature sensor 60 according to the fourth embodiment from the sixth surface S6 side.
  • Fig. 12B is a diagram showing the configuration of the case 62c from the fourth surface S4 side.
  • Fig. 12C is a diagram showing the configuration of the case 62c from the first surface S1 side.
  • the protrusion corresponding to the second protrusion 623 is omitted, as in the second embodiment, and the case 62c has only the protrusion 622c corresponding to the first protrusion 622.
  • the protrusion 622c has a root portion 624c which corresponds to the base of the protrusion, and a tip portion 625c which corresponds to the tip of the protrusion.
  • the root portion 624c is connected to the first surface S1 of the main body portion 621 of the case 62c and protrudes approximately perpendicularly from the first surface S1.
  • the height of the root portion 624c is approximately equal to the plate thickness D of the flat conductor 20.
  • the height of the root portion 624c is the dimension in the direction of the distance between the first surface S1 and the second surface S2, in other words, the protruding dimension from the first surface S1 in the normal direction of the first surface S1.
  • the tip 625c is a portion that is continuous with the base 624c and protrudes from the base 624c approximately parallel to the first surface S1, and has a flat surface 74c that faces the first surface S1.
  • the tip 625c has a truncated cone shape that narrows from the portion connected to the base 624c toward the protruding end 77c.
  • the plan view of the tip 625c is the outline of the shape of the tip 625a projected onto a plane parallel to the first surface S1 from the direction of the distance between the first surface S1 and the second surface S2, and has an approximately circular shape similar to the opening shape of the through hole 202c of the flat conductor 20 described later.
  • the continuous portion of the tip 625c with the base 624c i.e., the planar circle of the flat surface 74c of the tip 625c, is larger than the planar circle of the protruding end 77c of the tip 625c.
  • the tip 625c is spaced from the first surface S1 by the height of the base 624c in the direction of the distance between the first surface S1 and the second surface S2. That is, the opposing distance B4 between the flat surface 74c of the tip 625c and the first surface S1 is approximately equal to the depth of the through hole 202b of the flat conductor 20, that is, the plate thickness D of the flat conductor 20 (see FIG. 13B described later).
  • FIG. 13A and 13B show the mounting state of the temperature sensor 60 to the flat conductor 20 according to the fourth embodiment.
  • the hole corresponding to the second hole 206 is omitted, and the flat conductor 20 has only the through hole 202c corresponding to the first hole 205.
  • the opening shape of the through hole 202c is approximately circular similar to the planar figure of the protruding end 77c of the tip 625c.
  • the size of the opening of the through hole 202c is larger than the circle of the planar figure of the flat surface 74c of the tip 625c and smaller than the circle of the planar figure of the protruding end 77c of the tip 625c. This allows the tip 625c to be inserted into the through hole 202c. In addition, when the inserted tip 625c is pushed into the through hole 202c and passes through the through hole 202c, it can be made to protrude from the through hole 202c. When the tip 625c protrudes from the through hole 202c, the flat surface 74c and the opening edge of the through hole 202c on the back surface 204 of the flat conductor 20 come into contact with each other, allowing interference. In other words, in this state, the tip 625c functions as a barb or hook for the through hole 202c.
  • the temperature sensor 60 can be attached to the flat conductor 20, for example, by the following procedure.
  • the first surface S1 of the main body 621 is placed facing the mounting surface 203 of the flat conductor 20, and the temperature sensor 60 is positioned so that the longitudinal direction of the main body 621 coincides with the longitudinal direction of the flat conductor 20.
  • the protrusion 622c is inserted into the through hole 202c.
  • the protruding end 77c of the tip 625c of the protrusion 622c is inserted into the through hole 202c, and the peripheral surface 78c of the tip 625c is abutted against the opening edge of the through hole 202c.
  • the tip 625c is pushed into the through hole 202c as it is, passing through the through hole 202c, and popping out of the through hole 202c.
  • Fig. 13A is a schematic diagram showing the state in which the temperature sensor 60 is attached to the flat conductor 20 from the back surface 204 side of the flat conductor 20.
  • Fig. 13B is a schematic diagram showing the state in which the temperature sensor 60 is attached to the flat conductor 20 from the sixth surface S6 side of the main body portion 621.
  • the opposing distance B4 between the flat surface 74c and the first surface S1 is approximately equal to the plate thickness D of the flat conductor 20. Therefore, when the tip portion 625c is pushed into the through hole 202c and protrudes from the through hole 202c, the body portion 621 is in a state where the opening edge of the through hole 202c of the flat conductor 20 is sandwiched between the first surface S1 and the tip portion 625c. Furthermore, the flat surface 74c of the tip portion 625c is hooked on the opening periphery of the through hole 202c on the back surface 204 of the flat conductor 20. As a result, the temperature sensor 60 is positioned and fixed relative to the flat conductor 20 in the longitudinal direction and plate thickness direction of the flat conductor 20.
  • the temperature sensor 60 is provided with a protrusion 622c, and the flat conductor 20 is provided with a through hole 202c, making it possible to attach the temperature sensor 60 to the flat conductor 20 with a simple structure.
  • the temperature sensor 61 and the through hole 202c do not overlap when viewed in the direction of the distance between the first surface S1 and the second surface S2, in other words, the normal direction of the first surface S1, but the temperature sensor 61 and the conductor portion 201 of the flat conductor 20 are positioned so as to overlap.
  • the temperature sensor 61 and the through hole 202c of the flat conductor 20 may be positioned so as to overlap when viewed in the direction of the distance between the first surface S1 and the second surface S2.
  • the temperature sensor 61 and the through holes 202, 202b of the flat conductor 20 are positioned so as not to overlap when viewed from the direction of the distance between the first surface S1 and the second surface S2 of the main body 621.
  • the temperature sensor 61 and the through hole 202 of the flat conductor 20 may be positioned so as to have an overlapping portion when viewed from the direction of the distance between the first surface S1 and the second surface S2 of the main body 621.
  • the overlapping portion may be, for example, the entire temperature sensor 61, or only a portion of it.
  • the flat conductor 20 is in the shape of a band of a constant width.
  • widened portions 211, 212 may be provided in the vicinity of the through holes 202d, 202e by widening the flat conductor 20.
  • the widened portions 211, 212 are portions in which a portion of the conductor portion 201 is widened in the width direction perpendicular to the longitudinal direction of the flat conductor 20.
  • the widened portions 211, 212 are part of the conductor portion 201, and fill in the missing areas of the conductor portion 201 caused by the through holes 202d, 202e.
  • the flat conductor 20 shown in FIG. 15A has a through hole 202d with a rectangular opening.
  • a pair of widened portions 211 with a trapezoidal planar shape are provided on both sides of the width direction of the flat conductor 20 (vertical direction in FIG. 15A).
  • the flat conductor 20 shown in FIG. 15B has a through hole 202e with a circular opening.
  • a widened portion 212 with a substantially semicircular planar shape is provided on only one side of the width direction of the flat conductor 20 (vertical direction in FIG. 15B).
  • planar shapes of the widened portions 211, 212 are the contours of the shape of the widened portions 211, 212 projected onto a plane parallel to the mounting surface 203 from the direction of the distance between the mounting surface 203 and the back surface 204 of the flat conductor 20, in other words, from the plate thickness direction of the flat conductor 20, and are not limited to the illustrated shape.
  • the reduction in the conductor portion 201 caused by the through holes 202d, 202e can be compensated for, and the conductor portion 201 in the flat conductor 20 can be properly secured. This makes it possible to reduce the increase in resistance caused by the presence of the through holes 202d, 202e in the flat conductor 20, for example, when electrically connecting the coils 18 of each phase.
  • conductor portion 202, 202b, 202c, 202d, 202e... through holes, 203... mounting surface, 204... rear surface, 205... hole portion (first hole portion), 206, 206b... hole portion (second hole portion), 207, 207b, 209b... ends of first hole portion, 208, 208b, 210b... ends of second hole portion, 211, 212... widened portion, 621... main body portion, 622, 622a, 622b...

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
PCT/JP2023/014245 2023-04-06 2023-04-06 回転電機の固定子 WO2024209627A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2023/014245 WO2024209627A1 (ja) 2023-04-06 2023-04-06 回転電機の固定子
JP2024527552A JPWO2024209627A1 (enrdf_load_stackoverflow) 2023-04-06 2023-04-06

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5745134B2 (enrdf_load_stackoverflow) * 1975-11-14 1982-09-25
JPH0459992U (enrdf_load_stackoverflow) * 1990-09-28 1992-05-22
JPH05302311A (ja) * 1992-04-24 1993-11-16 Kita Nippon Block Kogyo Kk 護岸の施工方法
JP2002296123A (ja) * 2001-03-29 2002-10-09 Sanyo Electric Co Ltd 温度センサ及びその製造方法
JP2007174814A (ja) * 2005-12-22 2007-07-05 Mitsubishi Electric Corp 電源装置
JP2011153932A (ja) * 2010-01-27 2011-08-11 Hitachi Cable Ltd 回転センサの取付構造
JP2021196170A (ja) * 2020-06-09 2021-12-27 株式会社東芝 温度検出装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5745134B2 (enrdf_load_stackoverflow) * 1975-11-14 1982-09-25
JPH0459992U (enrdf_load_stackoverflow) * 1990-09-28 1992-05-22
JPH05302311A (ja) * 1992-04-24 1993-11-16 Kita Nippon Block Kogyo Kk 護岸の施工方法
JP2002296123A (ja) * 2001-03-29 2002-10-09 Sanyo Electric Co Ltd 温度センサ及びその製造方法
JP2007174814A (ja) * 2005-12-22 2007-07-05 Mitsubishi Electric Corp 電源装置
JP2011153932A (ja) * 2010-01-27 2011-08-11 Hitachi Cable Ltd 回転センサの取付構造
JP2021196170A (ja) * 2020-06-09 2021-12-27 株式会社東芝 温度検出装置

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