JP2016157857A - Coil, and reactor - Google Patents

Coil, and reactor Download PDF

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Publication number
JP2016157857A
JP2016157857A JP2015035581A JP2015035581A JP2016157857A JP 2016157857 A JP2016157857 A JP 2016157857A JP 2015035581 A JP2015035581 A JP 2015035581A JP 2015035581 A JP2015035581 A JP 2015035581A JP 2016157857 A JP2016157857 A JP 2016157857A
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coil
portion
temperature sensor
winding
reactor
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JP2015035581A
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Japanese (ja)
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睦 伊藤
Mutsumi Ito
睦 伊藤
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住友電装株式会社
Sumitomo Wiring Syst Ltd
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Publication of JP2016157857A publication Critical patent/JP2016157857A/en
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Abstract

PROBLEM TO BE SOLVED: To provide a coil which allows for manufacturing of a reactor with good productivity, and to provide a reactor using that coil.SOLUTION: A coil 2 having wound parts 2A, 2B formed by winding a rectangular wire 2w edgewise, also has a protrusion 2P protruding at least one of radial outward and axial outward of the wound parts 2A, 2B, and includes a temperature sensor 20 attached to the outer periphery of the protrusion 2P. The reactor includes a union body having the coil 2 and a magnetic core. When attaching the temperature sensor 20 to the protrusion 2P of the wound parts 2A, 2B protruding in the radial or axial direction, the portion other than the protrusion 2P does not interfere with the attachment work of the temperature sensor 20, and thereby the coil 2 ensures excellent productivity.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a reactor used for a component part of a vehicle-mounted DC-DC converter or a power conversion device mounted on a vehicle such as a hybrid vehicle, and a coil used for the reactor.

  Magnetic parts such as reactors and motors are used in various fields. As such a magnetic component, for example, Patent Document 1 discloses a reactor used in a converter of a hybrid vehicle.

  Patent Document 1 discloses a combination of a coil having a pair of winding portions and a magnetic core partially disposed inside the winding portion, and a temperature sensor (typically, a physical quantity related to a reactor). , A temperature sensor that measures the temperature of the coil). In this reactor, the temperature sensor is fixed on the upper side of the combined body and at a position between the pair of winding portions. For the fixing, an insulator (insulating intervening member) that secures insulation between the coil and the magnetic core is used. More specifically, a portion (housing portion) where the temperature sensor is arranged is provided in the insulating interposed member, and the position of the temperature sensor is fixed by arranging the temperature sensor in the housing portion.

JP 2012-253384 A

  Since the reactor disclosed in Patent Document 1 has a configuration in which a temperature sensor is inserted into a narrow housing portion, if the clearance between the housing portion and the temperature sensor is small, it takes time to arrange the temperature sensor. In addition, if the clearance between the storage unit and the temperature sensor is increased in order to make it easier to place the temperature sensor, there may be variations in the temperature sensor placement position for each production lot, resulting in increased coil temperature measurement accuracy. There may be variations.

  Moreover, in the structure of patent document 1, the temperature sensor is arrange | positioned between a pair of winding parts, and there is a distance between a temperature sensor and a winding part (coil). Therefore, there is a problem that a time lag is likely to occur between the temperature rise of the coil and the detection by the temperature sensor.

  The present invention has been made in view of the above circumstances, and one of its purposes is to provide a coil that is excellent in productivity and that can quickly and accurately measure the temperature rise of the coil, and a reactor using the coil. It is to provide.

  A coil according to an aspect of the present invention is a coil having a winding portion formed by edgewise winding a rectangular wire, and is provided on at least one of a radially outer side and an axially outer side of the winding portion. A temperature sensor is provided that has a protruding portion that protrudes and is attached to the outer periphery of the protruding portion.

  The reactor which concerns on 1 aspect of this invention is equipped with the assembly which has the said coil and a magnetic core.

  The coil is a coil that is excellent in productivity and capable of measuring a temperature rise of the coil quickly and accurately.

  Since the reactor uses the coil, it has excellent productivity.

2 is a schematic perspective view of a coil shown in Embodiment 1. FIG. 2 is a schematic front view of a coil shown in Embodiment 1. FIG. It is III-III sectional drawing of FIG. It is a schematic perspective view of the reactor using the coil shown in Embodiment 1. It is a disassembled perspective view of the union body with which the reactor of FIG. 4 is equipped.

-Description of embodiment of this invention First, the embodiment of this invention is listed and demonstrated.

The coil of the <1> embodiment is a coil having a winding part formed by edgewise winding a rectangular wire, and protrudes in at least one of the radially outer side and the axially outer side of the winding part. A temperature sensor attached to an outer periphery of the protrusion.

  Here, as a protrusion part which protrudes to the radial direction outward of a winding part, as shown in embodiment mentioned later, a part of turn which constitutes a winding part can be mentioned. Moreover, as a protrusion part which protrudes to the axial direction outward of a winding part, when a coil is provided with a pair of winding part, the connection part which connects both winding parts can be mentioned.

  The coil is excellent in productivity. This is because when the temperature sensor is attached to the projecting portion, the portion other than the projecting portion does not obstruct the temperature sensor attaching operation if the projecting portion projects in the radial direction or the axial direction of the winding portion.

  Moreover, in the said coil, since the temperature sensor is directly attached to the outer periphery of the rectangular wire which comprises a coil, when it supplies with electricity to a coil, the temperature of a coil can be measured accurately and rapidly. If the temperature of the coil can be monitored accurately and quickly, stable operation of the reactor can be ensured based on the monitoring result.

<2> As one form of the coil of the embodiment, the projecting portion is such that one of a plurality of turns constituting the winding portion is directed outward in the radial direction of the winding portion rather than the other turns. The form currently formed by overhanging can be mentioned.

  The winding part of the coil is likely to be hotter than a part other than the winding part (for example, in the case of a coil having a pair of winding parts, a connecting part that connects both winding parts). This is because the rectangular wires are densely arranged in the winding portion, so that heat easily accumulates in the winding portion. Since the temperature sensor is for monitoring the temperature of the coil so that the coil does not become too hot, it is preferable that the temperature sensor is provided in a portion of the coil that tends to become hot. Therefore, the coil temperature can be properly monitored by providing a temperature sensor at a part of one turn of the winding part as the protrusion.

<3> As one form of the coil of the embodiment in which one of the turns of the winding part constitutes the protrusion, the turn constituting the protrusion is a turn located at the center of the winding part. Can be mentioned.

  Among the coil winding portions, the temperature is most likely to be highest at the center in the axial direction of the winding portion. Therefore, the maximum temperature of the coil or the temperature according to the maximum temperature can be monitored by providing a protrusion for attaching the temperature sensor to the turn located at the center of the winding portion.

<4> As one form of the coil of embodiment, the form provided with the thermal radiation grease interposed between the said protrusion part and the said temperature sensor can be mentioned.

  By filling a minute gap formed between the protruding portion and the temperature sensor with heat dissipation grease, the temperature of the coil can be appropriately monitored by the temperature sensor.

<5> As an embodiment of the coil of the embodiment, the temperature sensor may be formed in a shape that can be fitted into the outer periphery of the rectangular wire. More specifically, among the outer peripheral surfaces of the rectangular wire, when the pair of surfaces formed wide are the first wide surface and the second wide surface, respectively, and the pair of surfaces connecting these wide surfaces are side surfaces, The temperature sensor includes a base portion that contacts the first wide surface of the flat wire, a pair of side pieces that are formed on one end side and the other end side of the base portion, and that contacts the side surface of the flat wire, and the side It is set as the form provided with a pair of nail | claw part formed in the edge part on the opposite side to the said base part of a piece, and hooking on the said 2nd wide surface of the said flat wire.

  If it is a temperature sensor which can be fitted in the outer periphery of a flat wire, the temperature sensor can be arranged and fixed to the coil at the same time.

The reactor of <6> embodiment is provided with the combination which has the coil which concerns on embodiment, and a magnetic core.

  Since the said reactor is produced using the coil which concerns on embodiment with easy attachment of a temperature sensor, it is excellent in productivity. Moreover, since the said reactor is produced using the coil which concerns on embodiment which can measure the temperature of a coil rapidly and correctly, it can grasp | ascertain correctly the temperature of the coil at the time of operation of a reactor.

<7> An embodiment of the reactor according to the embodiment includes a heat sink on which the combined body is placed, and the protruding portion of the coil is formed on a portion opposite to the heat sink. be able to.

  In the configuration in which the assembly is placed on the heat radiating plate, the heat radiating plate becomes a main heat radiating path of heat generated in the reactor during operation. Therefore, the portion of the coil on the side of the heat sink is easily cooled, and conversely, the portion of the coil opposite to the heat sink (distal portion) is difficult to cool. That is, it may be considered that monitoring the temperature of the distal portion is equivalent to monitoring the temperature of the portion of the coil that tends to be hot. It is effective to provide a temperature sensor in the distal portion and monitor the temperature of the distal portion in order to ensure stable operation of the reactor.

-Details of embodiment of this invention Hereinafter, embodiment of this invention is described based on drawing. The same reference numerals in the figure indicate the same names. In addition, this invention is not necessarily limited to the structure shown by embodiment, and is shown by the claim, and intends that all the changes within the meaning and range equivalent to a claim are included.

<Embodiment 1>
≪Coil≫
Based on FIGS. 1-3, the structure of the coil 2 of embodiment is demonstrated. The main difference between the coil 2 and the conventional coil is that a temperature sensor that measures the temperature of the coil 2 at the time of energization at the position of the projecting portion 2P formed of a part of the winding (flat wire 2w) constituting the coil 2. 20 is integrated. Hereinafter, the configuration of the coil 2 will be sequentially described, and the protrusion 2P and the temperature sensor 20 will be described in detail.

[overall structure]
As shown in FIG. 1, the coil 2 in the present embodiment includes a pair of winding portions 2A and 2B and a connecting portion 2R that connects both winding portions 2A and 2B. Each winding part 2A, 2B is formed in a hollow cylindrical shape with the same number of turns and the same winding direction, and is arranged in parallel so that the respective axial directions are parallel. Further, the connecting portion 2R is a portion bent in a U shape that connects the two winding portions 2A and 2B. The coil 2 may be formed by spirally winding a single flat wire 2w without a joint, or each winding portion 2A, 2B may be formed by a separate flat wire 2w, and each winding portion 2A, You may form by joining the edge parts of 2B flat wire 2w by welding or pressure bonding.

  Each winding part 2A, 2B of this embodiment is formed in a rectangular tube shape. The rectangular tube-shaped winding parts 2A and 2B are winding parts whose end face shape is a square shape (including a square shape) with rounded corners. Although not shown, the winding portions 2A and 2B may be formed in a cylindrical shape. The cylindrical winding portion is a winding portion whose end face shape is a closed curved surface shape (an elliptical shape, a perfect circle shape, a race track shape, etc.).

  The coil 2 including the winding portions 2A and 2B can be configured by a covered wire having an insulating coating made of an insulating material on the outer periphery of a flat wire made of a conductive material such as copper, aluminum, magnesium, or an alloy thereof. . In this embodiment, the windings 2A and 2B are formed by edgewise winding a rectangular wire made of copper and a conductor made of enamel (typically polyamideimide). Yes.

  Both end portions 2a and 2b of the coil 2 are extended from the winding portions 2A and 2B and connected to a terminal member (not shown). An external device such as a power source for supplying power is connected to the coil 2 through the terminal member.

[Projection]
The coil 2 includes a projecting portion 2P formed by one of a plurality of turns constituting the winding portion 2A projecting outward in the radial direction from the other turns. Therefore, as shown in FIG. 2, when the coil 2 is viewed from the axial direction of the winding portion 2A, the protruding portion 2P protrudes outward in the radial direction of the winding portion 2A from the other portions. The protrusion 2P is provided with a temperature sensor 20 to be described later for measuring the temperature of the coil 2.

  Here, as shown in FIG. 2, the turn (projection turn) in which the projecting portion 2 </ b> P is formed is formed in a rectangular shape whose overall shape is long in the vertical direction on the paper surface, and a turn other than the projecting turn (normal turn) Is formed in a substantially square shape. Therefore, the flat wire 2w constituting the protruding turn protrudes only on the upper side of the contour shape of the normal turn, and the protruding portion 2P is formed by this protruding portion. Further, the lower edge (see the black arrow) of the flat wire 2w constituting the protruding portion 2P is positioned above the outer peripheral contour line of the normal turn. Thus, since the protrusion part 2P protrudes larger than another part, when attaching the temperature sensor 20 mentioned later to the protrusion part 2P, the said other part does not interfere with the attachment.

  As shown in FIG. 1, the protruding portion 2 </ b> P of this example is provided in a turn located at the center in the axial direction of the winding portion 2 </ b> A. This is because the center in the axial direction of the winding portion 2A is the place where the temperature is most likely to be the highest, and is suitable as the mounting position of the temperature sensor 20 for measuring the temperature of the coil 2. Since portions other than the central portion in the axial direction of the winding portion 2A are likely to have a high temperature if not as much as the central portion, the projecting portions 2P may be provided on turns other than the central portion. Of course, the protruding portion 2P can be provided on any turn of the winding portion 2B.

[Temperature sensor]
The temperature sensor 20 is fitted from the outer peripheral side of the protrusion 2P into a rectangular wire 2w that constitutes the protrusion 2P (see FIGS. 1 and 2). The measurement result of the temperature of the protrusion 2P (the temperature of the coil 2) measured by the temperature sensor 20 is transmitted to the outside through a signal line 20L extending from the temperature sensor 20. A specific configuration of the temperature sensor 20 will be described with reference to FIG.

  3 is a cross-sectional view taken along the line III-III in FIG. In FIG. 3, for convenience of explanation, the temperature sensor 20 and the rectangular wire 2w are drawn so as to have a gap, but in practice, almost no gap is formed between the two, 20 and 2w.

Prior to the description of the temperature sensor 20, the four outer peripheral surfaces of the flat wire 2w are defined as follows.
First wide surface F1... Wide surface facing left side of paper. Side surface F2. Narrow surface facing upper side of paper surface. Side surface F3. Narrow surface facing lower side of paper. Second wide surface F4. Wide side facing the right side of the page

  The temperature sensor 20 includes a base portion 21, a pair of side pieces 22 and 23, and a pair of claw portions 24 and 25, and has a substantially C-shaped cross section. Each part 21-25 is comprised by molded objects, such as resin. The base portion 21 is a portion that contacts the first wide surface F1 of the flat wire 2w. The side piece 22 and the side piece 23 are portions that contact the side surface F2 and the side surface F3 of the flat wire 2w, respectively. The claw part 24 and the claw part 25 are parts formed at the end of the side piece 22 and the end of the side piece 23, respectively, and hooked on the second wide surface F4 of the flat wire 2w. The temperature sensor 20 having such a configuration can be fitted into the outer periphery of the flat wire 2w by elastically deforming the temperature sensor 20 so as to widen the gap between the claws 24 and 25, and can be fitted into the flat wire 2w. After that, it becomes difficult to come off the flat wire 2w. As shown in the figure, the outer side (right side of the drawing) between the claws 24 and 25 is wider than the inner side (left side of the drawing), so that the temperature sensor is easily fitted into the rectangular wire 2w and is not easily removed. 20 can be set.

  A sensor element 21 </ b> S is embedded in the base 21 of the temperature sensor 20. Since the base 21 is a portion that is difficult to bend when the temperature sensor 20 is fitted, the sensor element 21S is not easily damaged. Moreover, since the base 21 is the portion having the largest contact area with the flat wire 2w, the temperature of the flat wire 2w (the temperature of the coil 2) can be measured quickly and accurately by the sensor element 21S. The signal line 20 </ b> L (see FIGS. 1 and 2) that transmits the measurement result of the sensor element 21 </ b> S may be drawn out to the outer side of the base 20 (opposite the claw portions 24 and 25).

  It is preferable that heat radiation grease 20G be interposed between the inner peripheral surface of the temperature sensor 20 and the outer peripheral surface of the rectangular wire 2w. Since the gap formed between the temperature sensor 20 and the flat wire 2w can be filled with the heat radiation grease 20G, the temperature of the flat wire 2w by the temperature sensor 20 can be accurately measured.

  As the heat radiation grease 20G, heat radiation grease applied between a CPU (Central Processing Unit) and a heat sink can be used. For example, silicone grease or the like can be used as the heat radiation grease 20G.

[Effect of coil]
The coil 2 having the configuration described above can be easily manufactured. In order to form the protrusion 2P on the winding part 2A, it can be easily performed by adjusting the setting of the winding machine that the coil 2 produces, and the temperature sensor 20 is attached to the rectangular wire 2w of the protrusion 2P. This is because the temperature sensor 20 can be integrated with the coil 2 simply by fitting.

≪Reactor≫
An example of the reactor 1 using the coil 2 described above will be described with reference to FIGS. A reactor 1 shown in FIG. 4 has a configuration in which an assembly 1α (see also FIG. 5) having the above-described coil 2 and magnetic core 3 is fixed on a heat sink 9 with a bonding layer 8.

[coil]
The configuration of the coil 2 has already been described with reference to FIGS. Here, in the reactor 1 of this example, the protrusion 2 </ b> P of the coil 2 is disposed on the side opposite to the heat sink 9. As will be described later, the heat radiating plate 9 is a member serving as a main heat radiating path of heat generated in the reactor 1 during operation. Therefore, the portion of the coil 2 on the side of the heat sink 9 is easily cooled, and conversely, the portion of the coil 2 opposite to the heat sink 9 (distal portion) is difficult to cool. That is, it may be considered that monitoring the temperature of the distal portion is equivalent to monitoring the temperature of the portion of the coil 2 that tends to be hot. Therefore, providing the temperature sensor 20 at the distal portion and monitoring the temperature of the distal portion is effective for ensuring stable operation of the reactor 1.

[Magnetic core]
A part of the magnetic core 3 is inserted into the winding portions 2 </ b> A and 2 </ b> B of the coil 2, and forms a closed magnetic path when the coil 2 is energized. The magnetic core 3 will be described with reference to an exploded perspective view of FIG. The configuration of the magnetic core 3 shown in FIG. 5 is merely an example, and the form of the magnetic core 3 is not limited to the configuration shown in FIG.

  The magnetic core 3 in this example includes a pair of first core components 310 formed in a columnar shape, and a pair of second core components 320 and 320 that connect the end faces 310e and 310e of the first core components 310 and 310. . The first core components 310 and 310 and the second core components 320 and 320 are connected in a ring shape, so that the magnetic core 3 is formed.

[[First core part]]
The 1st core component 310 is a member provided with the inner core part 31 arrange | positioned inside the winding part 2A (2B) of the coil 2, and the resin mold part 310m which covers the outer periphery. The inner core portion 31 is configured by alternately laminating a plurality of divided core pieces 31m and a plurality of gap members 31g. The divided core pieces 31m are compacted bodies formed by pressure-molding raw material powder containing soft magnetic powder. The gap material 31g is a member for adjusting the magnetic characteristics of the inner core portion 31, and can be made of alumina, for example. The resin mold part 310m is for integrating the plurality of divided core pieces 31m and the plurality of gap members 31g and ensuring insulation between the magnetic core 3 and the coil 2. A plurality of divided core pieces 31m may be arranged at intervals in the mold, and the divided core pieces 31m may be integrated by the resin mold portion 310m. In that case, the resin mold part 310m that has entered between the adjacent split cores 31m functions as a gap material.

  The resin mold part 310m includes a polyphenylene sulfide (PPS) resin, a polytetrafluoroethylene (PTFE) resin, a liquid crystal polymer (LCP), a polyamide (PA) resin such as nylon 6 and nylon 66, a polybutylene terephthalate (PBT) resin, and acrylonitrile. A thermoplastic resin such as butadiene styrene (ABS) resin can be used. In addition, thermosetting resins such as unsaturated polyester resins, epoxy resins, urethane resins, and silicone resins can be used. A ceramic filler such as alumina or silica may be contained in these resins to improve the heat dissipation of the resin mold part 310m.

[[Second core part]]
The 2nd core component 320 is a member which covered the outer periphery of the outer core part 32 arrange | positioned on the outer side of winding part 2A, 2B with the resin mold part 320m. The outer core part 32 is comprised by the division | segmentation core piece 32m which is a substantially semi-cylindrical compacting body.

[[Other configurations related to core parts]]
The first core component 310 and the second core component 320 in this example are a thin portion 311 formed at the axial end of the first core component 310, a frame portion 321 formed at the second core component 320, Are connected by mechanical fitting. The thin part 311 is a part formed by the resin mold part 310m being thinner than the other part, and the frame part 321 is a part formed by the resin mold part 320m protruding. The outer core portion 32 is exposed inside the frame portion 321 without being covered by the resin mold portion 320m.

  In the configuration of this example in which the first core component 310 and the second core component 320 are connected, the end surface 310e of the first core component 310 and the end surface 32e of the outer core portion 32 (divided core piece 32m) of the second core component 320 are used. And contact. An adhesive may be used between the end surface 310e and the end surface 32e. Here, the end surface 310 e is configured by a resin mold portion 310 m that covers the end surface 31 e of the inner core portion 31. Therefore, in this example, the resin mold part 310m functions as a gap material between the end face 31e of the inner core part 31 and the end face 31e of the outer core part 32.

  Unlike the illustrated configuration, the magnetic core 3 can also be configured of a composite material including soft magnetic powder and resin. In that case, it is preferable to arrange an insulating interposed member (see, for example, Patent Document 1) between the coil 2 and the magnetic core 3 to ensure insulation between the coil 2 and the magnetic core 3.

[Heatsink]
The heat sink 9 is a member that functions as a pedestal when the reactor 1 is fixed to an installation target such as a cooling base. Therefore, the heat sink 9 is required to have excellent mechanical strength. Further, the heat radiating plate 9 is required to play a role of releasing heat generated in the combined body 1α to the installation target when the reactor 1 is used. Therefore, the heat sink 9 is required to have excellent heat dissipation in addition to mechanical strength. In order to meet such a demand, the heat sink 9 is made of metal. For example, aluminum or an alloy thereof, magnesium or an alloy thereof can be used as a constituent material of the heat sink 9. These metals (alloys) have the advantage of being excellent in mechanical strength and thermal conductivity, lightweight and non-magnetic.

[Joint layer]
A bonding layer 8 is formed between the heat radiating plate 9 and the combined body 1α to join the heat sinks 1 and 9 together. The bonding layer 8 also has a function of conducting heat generated in the combined body 1α when the reactor 1 is used to the heat radiating plate 9.

  The constituent material of the joining layer 8 shall have insulation. For example, thermosetting resins such as epoxy resins, silicone resins, and unsaturated polyesters, and thermoplastic resins such as PPS resins and LCPs can be used. You may improve the heat dissipation of the joining layer 8 by making these insulating resin contain the ceramic filler mentioned above. The thermal conductivity of the bonding layer 8 is preferably, for example, 0.1 W / m · K or more, more preferably 1 W / m · K or more, and particularly preferably 2 W / m · K or more.

  The bonding layer 8 may be formed by applying an insulating resin (or a ceramic filler-containing resin) on the heat sink 9, or by bonding an insulating resin sheet material on the heat sink 9. You may do it. It is preferable to use a sheet-like material as the bonding layer 8 because the bonding layer 8 can be easily formed on the heat sink 9.

[Reactor effect]
The reactor 1 described above can accurately measure the temperature of the coil 2 during its operation. This is because the temperature sensor 20 that measures the temperature of the coil 2 is in direct contact with the outer periphery of the rectangular wire 2 w that constitutes the coil 2. Particularly in this example, since the temperature sensor 20 monitors the temperature of the portion of the coil 2 where the temperature is most likely to rise, the temperature of the coil 2 increases as the magnetic characteristics of the reactor 1 decrease. It is possible to take measures such as stopping the operation of the reactor 1 before.

  Moreover, the reactor 1 is excellent in productivity. This is because, when the reactor 1 is manufactured, the coil 2 in which the temperature sensor 20 is integrated is used, so that the trouble of attaching the temperature sensor 20 is reduced.

<Embodiment 2>
In the first embodiment, the protruding portion 2P is formed on the turn of the winding portion 2A (or the winding portion 2B). On the other hand, the connection part 2R which connects winding part 2A, 2B may be regarded as the protrusion part 2P, and the temperature sensor 20 may be attached to the connection part 2R. The connecting portion 2R can be regarded as a portion protruding in the axial direction of the winding portion 2A in the coil 2.

  When the temperature sensor 20 is formed in the connecting portion 2R and the reactor is controlled based on the measured value, it is preferable to correct the measured value. This is because during operation of the reactor, the temperature of the connecting portion 2R tends to be lower than the temperature of the winding portions 2A and 2B. As a measurement value correction method, for example, there is a method in which correlation data between the temperature of the connecting portion 2R and the temperature of the winding portions 2A and 2B is obtained in advance and the measurement value is corrected based on the data. .

  Here, unlike the reactor 1 shown in FIG. 4, there is a reactor in which the height of the magnetic core 3 (outer core portion 32 in FIG. 5) located below the connecting portion 2 </ b> R reaches the upper surfaces of the winding portions 2 </ b> A and 2 </ b> B. To do. In such a reactor, the connecting portion 2R protrudes outward in the radial direction of the winding portion 2A so as not to interfere with the outer core portion 32 (see FIG. 5). In this case, the connecting portion 2R protrudes both radially outward and axially outward of the winding portion 2A.

<Embodiment 3>
In the first and second embodiments, the configuration in which the temperature sensor 20 is attached to the coil 2 including the pair of winding portions 2A and 2B has been described. On the other hand, it is good also as a structure which attached the temperature sensor to the coil (henceforth single coil) provided with only one winding part. In this case, similarly to the winding part 2A of the coil 2 shown in FIGS. 1 to 3, a protruding part is formed on one of a plurality of turns constituting the winding part of the single coil, and a temperature sensor is provided at the protruding part. It is good to attach.

<Embodiment 4>
In the first to third embodiments, the reactor formed by placing the combined body 1 on the flat heat sink 9 has been described (see FIG. 4). On the other hand, although illustration is abbreviate | omitted, it can also be set as the reactor which accommodates the assembly 1 (alpha) demonstrated in Embodiment 1 in a case.

  A case is a bottomed cylindrical member provided with a baseplate part and a side wall part. In this case, the bottom plate portion of the case also serves as the heat radiating plate 9 on which the assembly 1α is placed. A converter case can also be used as a case for storing the combination.

  The bottom plate portion and the side wall portion constituting the case may be an integral member, or may be a member obtained by joining the separately prepared bottom plate portion and the side wall portion later. In the latter case, the bottom plate portion and the side wall portion can be made of different materials. For example, the bottom plate portion may be made of aluminum or an alloy thereof, and the side wall portion may be made of a resin such as PPS.

  After housing the combination 1α in the case, the case may be filled with potting resin so that the combination 1α is embedded in the potting resin. The position of the combination 1α in the case can be fixed by the potting resin, and the combination 1α can be physically protected from the external environment. Examples of the potting resin include an epoxy resin, a urethane resin, and a silicone resin. A ceramic filler may be included in the potting resin to improve the heat dissipation of the potting resin.

  It is sufficient to fill the potting resin below the upper surface of the winding parts 2A and 2B, that is, below the temperature sensor 20. With such a filling amount, almost all of the coil 2 (portions other than the end portions 2a and 2b and the protruding portion 2P) and the magnetic core 3 can be covered with the potting resin, and the effect of providing the potting resin (Fixing of the combined body 1α, protection of the combined body 1α, heat radiation from the combined body 1α) can be sufficiently obtained. Here, since the temperature sensor 20 attached to the protrusion 2P of the coil 2 is mechanically engaged with the protrusion 2P, it is not necessary to fix its position with potting resin. The filling amount of the potting resin may be such that it covers the lower half of the winding portions 2A and 2B.

  The coil of this invention can be utilized for the reactor with which power converters, such as a bidirectional DC-DC converter mounted in electric vehicles, such as a hybrid vehicle, an electric vehicle, and a fuel cell vehicle, are equipped.

DESCRIPTION OF SYMBOLS 1 Reactor 1 (alpha) Assembly 2 Coil 2w Flat wire F1 1st wide surface F2, F3 Side surface F4 2nd wide surface 2A, 2B Winding part 2R Connection part 2a, 2b End part 2P Protrusion part 20 Temperature sensor 21 Base part 22, 23 side Pieces 24 and 25 Claw portion 20L Signal line 20G Heat radiation grease 21S Sensor element 3 Magnetic core 310 First core component 310m Resin mold portion 310e End surface 311 Thin portion 31 Inner core portion 31m Divided core piece 31g Gap material 31e End surface 320 Second core component 320 m Resin mold part 321 Frame part 32 Outer core part 32 m Divided core piece 32 e End face 8 Joining layer 9 Heat sink

Claims (7)

  1. A coil having a winding portion formed by edgewise winding a rectangular wire,
    A projecting portion projecting to at least one of the radially outer side and the axially outer side of the winding portion;
    A coil comprising a temperature sensor attached to the outer periphery of the protrusion.
  2.   The projecting portion is formed by one of a plurality of turns constituting the winding portion projecting outward in the radial direction of the winding portion from the other turns. The described coil.
  3.   The coil according to claim 2, wherein the turn constituting the projecting portion is a turn located at the center of the winding portion.
  4.   The coil of any one of Claims 1-3 provided with the thermal radiation grease interposed between the said protrusion part and the said temperature sensor.
  5. Of the outer peripheral surface of the rectangular wire, a pair of surfaces formed wide, a first wide surface and a second wide surface, respectively, a pair of surfaces connecting these wide surfaces as side surfaces,
    The temperature sensor is
    A base abutting against the first wide surface of the rectangular wire;
    A pair of side pieces that are formed on one end side and the other end side of the base, and abut against the side surface of the rectangular wire;
    A pair of claw portions formed at an end portion of the side piece opposite to the base portion and hooked on the second wide surface of the rectangular wire;
    The coil according to any one of claims 1 to 4, wherein the coil is fitted on an outer periphery of the rectangular wire.
  6.   A reactor comprising an assembly having the coil according to claim 1 and a magnetic core.
  7. A heat sink on which the combination is placed;
    The reactor according to claim 6, wherein the protruding portion of the coil is formed on a portion opposite to the heat radiating plate.
JP2015035581A 2015-02-25 2015-02-25 Coil, and reactor Pending JP2016157857A (en)

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WO2018147062A1 (en) * 2017-02-08 2018-08-16 株式会社オートネットワーク技術研究所 Reactor
CN108701536A (en) * 2016-01-22 2018-10-23 株式会社自动网络技术研究所 Reactor

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JPS5911431U (en) * 1982-07-15 1984-01-24
JP2009231390A (en) * 2008-03-19 2009-10-08 Sumitomo Electric Ind Ltd Reactor and coil for reactor
JP2010263077A (en) * 2009-05-07 2010-11-18 Sumitomo Electric Ind Ltd Reactor
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CN108701536A (en) * 2016-01-22 2018-10-23 株式会社自动网络技术研究所 Reactor
WO2018147062A1 (en) * 2017-02-08 2018-08-16 株式会社オートネットワーク技術研究所 Reactor

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