JP2015053395A - Reactor, converter, and electric power converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reactor capable of measuring a temperature of a coil further accurately.SOLUTION: A reactor comprises: a coil having a magnetic core, a turn part which is constituted by winding a winding and into which a part of the magnetic core is inserted, and a lead-out part in which a part of the winding is led out from an end surface of the turn part; an accessory member which is attached to at least one end part of the winding; a temperature sensor which is attached at least to one of the accessory member, the lead-out part, and the turn part, and measures temperature of the coil; and an insulation member which insulates the temperature sensor from fluid coolant that forcibly cools the coil.

Description

  The present invention relates to a reactor, a converter including the reactor, and a power conversion device including the converter. In particular, the present invention relates to a reactor that can measure the temperature of a coil more accurately.

  A reactor is one of the parts of a circuit that performs a voltage step-up operation or a voltage step-down operation. A reactor is a combination of a coil and a magnetic core, and is used for a converter mounted on a vehicle such as a hybrid vehicle or an electric vehicle. Since such a reactor is used by energizing a large current, it generates heat. Therefore, the reactor is generally cooled by being fixed to an installation target such as a cooling base or being immersed in a circulation path of a liquid refrigerant. In addition, a sensor for measuring a physical quantity such as a coil temperature or a current during the operation of the reactor is disposed in the vicinity of the reactor, and an excitation current or the like is controlled according to the measurement result.

  As a reactor fixed to a cooling base, there exist some which are shown, for example in patent document 1 (FIG. 1, FIG. 2). The reactor includes a coil including a pair of coil elements arranged in parallel, an annular magnetic core, a temperature sensor, and an insulator that insulates the coil from the magnetic core. Each coil element is a rectangular tubular body formed by winding a winding in a spiral shape, and has a corner R portion with rounded corners on the end face. The temperature sensor is pressed in the corner R portion by the sensor holding portion of the insulator disposed in the trapezoidal space sandwiched between the corner R portions opposed to each coil element (FIGS. 4 and 5). This reactor is used by being fixed to a cooling base so that the coil can be cooled (paragraphs 0135 and 0136).

  On the other hand, as a reactor immersed in a liquid flow medium, there exists a thing shown in patent document 2, for example (FIG. 1, FIG. 2). The reactor includes a coil in which a winding is wound in a spiral shape, a core fitted into the coil, and a resin coating portion (outside resin portion) that covers substantially the entire circumference of the assembly of the coil and the core. Fixed to the cooling base. The cooling base includes a storage unit in which the reactor is stored, and a liquid refrigerant that circulates in the storage unit and immerses the reactor (FIG. 3). The reactor radiates heat generated in the reactor by being immersed in the liquid refrigerant (paragraph 0066).

JP 2012-191172 A JP 2011-049494 A

  As for the reactor of patent document 1, the area | region which is not contact | abutting with the coil or the sensor holding | maintenance part is exposed among the surfaces of a temperature sensor. Therefore, when this reactor is cooled by immersing it in a liquid refrigerant as in Patent Document 2, the temperature of the coil itself cannot be accurately grasped because the exposed area of the temperature sensor is cooled by the liquid refrigerant, Measurement results may be inaccurate.

  The present invention has been made in view of the above circumstances, and one of its purposes is to provide a reactor in which a temperature sensor is less susceptible to cooling by a fluid refrigerant and can measure the temperature of a coil more accurately. .

  The reactor according to the present invention includes a magnetic core, a coil, an accessory member, a temperature sensor, and a heat insulating member. The coil includes a turn portion that is configured by winding a winding and through which a part of the magnetic core is inserted, and a lead-out portion that draws a part of the winding from the end face of the turn portion. The attachment member is attached to at least one end of the winding. The temperature sensor is attached to at least one of the attachment member, the drawer portion, and the turn portion, and measures the temperature of the coil. The heat insulating member insulates the temperature sensor from the fluid refrigerant that forcibly cools the coil.

  According to the reactor of the present invention, the temperature of the coil can be measured more accurately.

1 is a schematic perspective view of a reactor according to a first embodiment. 1 is a schematic exploded view of a reactor according to a first embodiment. It is the schematic perspective view which abbreviate | omitted the magnetic core and insulator of the reactor which concern on Embodiment 1. FIG. It is a schematic process drawing which shows the attachment method of the temperature sensor of the reactor which concerns on Embodiment 1. FIG. The upper part shows the state where the temperature sensor is in contact with the connection member, the middle part shows the state where the temperature sensor is covered with a resin piece, and the lower part fixes the temperature sensor covered with the resin piece with a shrink tube or tape. Each state is shown. It is a schematic perspective view of the reactor which concerns on Embodiment 2. FIG. It is a schematic perspective view of the reactor which concerns on Embodiment 3. FIG. It is a schematic perspective view of the reactor which concerns on Embodiment 4. It is a schematic perspective view of the reactor which concerns on Embodiment 5. FIG. It is a schematic perspective view of the reactor which concerns on Embodiment 6. FIG. 1 is a schematic configuration diagram schematically showing a power supply system of a hybrid vehicle. It is a schematic circuit which shows an example of the power converter device of this embodiment provided with the converter of this embodiment.

[Description of Embodiment of Present Invention]
First, the contents of the embodiments of the present invention will be listed and described.
(1) A reactor according to an embodiment of the present invention includes a magnetic core, a coil, an attached member, a temperature sensor, and a heat insulating member. The coil includes a turn portion that is configured by winding a winding and through which a part of the magnetic core is inserted, and a lead-out portion that draws a part of the winding from the end face of the turn portion. The attachment member is attached to at least one end of the winding. The temperature sensor is attached to at least one of the attachment member, the drawer portion, and the turn portion, and measures the temperature of the coil. The heat insulating member insulates the temperature sensor from the fluid refrigerant that forcibly cools the coil.

  In the reactor of this embodiment, the attachment position of the temperature sensor is at least one of an attachment member, a drawer portion, and a turn portion, and a region of the surface of the temperature sensor that is not in contact with these members is covered with a heat insulating member. Thereby, the temperature sensor can be insulated from the fluid refrigerant, and the temperature of the coil can be measured more accurately. Therefore, for example, it is possible to provide a reactor that can control the excitation current more accurately according to the measurement result. Moreover, since an attached member, a drawer | drawing-out part, and a turn part can attach a temperature sensor and a heat insulation member easily, it is excellent in productivity. Here, the fluid refrigerant refers to a gas refrigerant, a liquid refrigerant, and a gas-liquid mixed refrigerant, and specific examples include air and cooling oil.

(2) In the reactor according to the embodiment of the present invention, the coil includes a pair of coil elements arranged in parallel, each coil element is formed from individual windings, and the lead-out portion is one end of the winding of one coil element A temperature-sensor that includes a connection fitting that joins the two non-contact drawers to each other. There is a form in which the mounting location is a connecting bracket.

  The reactor of this embodiment makes it easy to attach a temperature sensor and a heat insulating member by using a connection fitting that is independent of the winding as the attachment location of the temperature sensor. Moreover, when manufacturing a reactor, attachment of a temperature sensor and the assembly | attachment to the reactor of the connection metal fitting which attached the temperature sensor can be performed by arbitrary processes. For example, the temperature sensor can be attached to the connection fitting at an appropriate stage, such as before and after assembly of the connection fitting to the coil element. Therefore, the assembly freedom at the time of manufacturing a reactor is high. Furthermore, by using a configuration in which a pair of coil elements arranged in parallel is connected by a connecting metal fitting, the configuration of each coil element can be made a common configuration. As mentioned above, the reactor of this embodiment is excellent in productivity.

(3) In the reactor according to the embodiment of the present invention, the coil includes a pair of coil elements arranged in parallel, each coil element is formed from individual windings, and the lead-out portion is a winding of one coil element. The temperature sensor is provided with a joint member that joins the two lead portions that are in contact with each other, and has one lead portion that is one end side and the other lead portion that is one end side of the winding of the other coil element. A form in which the attachment location is either one of the two drawer portions.

  The temperature sensor and the heat insulating member can be easily attached by setting the attachment location of the reactor and the temperature sensor of the present embodiment as one of the two drawer portions. Moreover, when manufacturing a reactor, attachment of the temperature sensor to a coil can be performed by arbitrary processes. For example, the temperature sensor can be attached to the lead-out portion at an appropriate stage such as before and after the joining of both coil elements. Therefore, the assembly freedom at the time of manufacturing a reactor is high. Furthermore, a pair of coil elements can be easily joined by setting it as the structure which joins a pair of coil elements paralleled with a joining member. As mentioned above, the reactor of this embodiment is excellent in productivity.

(4) In the reactor according to the embodiment of the present invention, the coil includes a pair of coil elements arranged in parallel, both coil elements are formed from a series of windings, and the lead-out portion is formed by bending a part of the windings. There is a configuration in which a bent portion that connects both coil elements is provided, and the temperature sensor is attached to the bent portion.

  The reactor of this embodiment is easy to attach a temperature sensor and a heat insulation member by making the attachment location of a temperature sensor into the bending part pulled out from the turn part. In addition, when manufacturing the reactor, the temperature sensor can be attached to the coil in an arbitrary process after forming the coil, so that the degree of assembly freedom when manufacturing the reactor is high. Furthermore, since a pair of coil elements are formed from a series of windings, no separate members other than the windings are required when attaching a temperature sensor or a heat insulating member, and an operation of connecting the separate members to the coil elements is also necessary. Absent. As mentioned above, the reactor of this embodiment is excellent in productivity.

(5) In the reactor according to the embodiment of the present invention, the attachment member includes a terminal fitting connected to the end of the winding, and the attachment location of the temperature sensor is a leading portion, and the leading portion is a terminal in the winding. The form which is the vicinity of a metal fitting is mentioned.

  In the reactor of the present embodiment, the temperature sensor is attached to the lead portion, and the lead portion is in the vicinity of the terminal fitting in the winding, so that the temperature sensor and the heat insulating member can be easily attached. Moreover, when manufacturing a reactor, since a temperature sensor can be attached in an arbitrary process after coil forming, the degree of assembly freedom when manufacturing a reactor is high. As mentioned above, the reactor of this embodiment is excellent in productivity.

(6) The reactor which concerns on embodiment of this invention WHEREIN: An attachment member is provided with the terminal metal fitting connected to the edge part of a coil | winding, and the form whose attachment location of a temperature sensor is a terminal metal fitting is mentioned.

  The reactor of this embodiment makes it easy to attach a temperature sensor or a heat insulating member by using a terminal fitting that is independent of the winding as the attachment location of the temperature sensor. Moreover, when manufacturing a reactor, since attachment of a temperature sensor and the assembly | attachment to the reactor of the terminal metal fitting which attached the temperature sensor can be performed in arbitrary processes, the assembly freedom at the time of manufacturing a reactor is high. As mentioned above, the reactor of this embodiment is excellent in productivity.

(7) The reactor which concerns on embodiment of this invention WHEREIN: The form whose attachment location of a temperature sensor is a turn part is mentioned.

  The reactor of this embodiment makes it easy to attach a temperature sensor or a heat insulating member by using the mounting location of the temperature sensor as a turn part. Moreover, when manufacturing a reactor, since the attachment of the temperature sensor after coil shaping | molding can be performed by arbitrary processes, the assembly freedom at the time of manufacturing a reactor is high. As mentioned above, the reactor of this embodiment is excellent in productivity.

(8) The reactor which concerns on embodiment of this invention WHEREIN: The form with which a heat insulation member is provided with a shrinkable tube is mentioned.

  The reactor of this embodiment can cover easily the whole area | region which is not contact | abutting with an attachment member, a drawer | drawing-out part, or a turn part among the surfaces of a temperature sensor by using a shrinkable tube for a heat insulation member. In particular, not only the surface of the temperature sensor, but also the mounting location of the temperature sensor, that is, any one of the winding, the connection fitting, and the terminal fitting can be covered with the temperature sensor. Moreover, when a shrinkable tube is provided with sufficient heat insulation, it can function as a fixing member of a temperature sensor, so that the temperature sensor can be insulated and fixed with a single member. As mentioned above, the reactor of this embodiment is excellent in productivity.

(9) The reactor which concerns on embodiment of this invention WHEREIN: The form with which a heat insulation member is provided with an adhesive tape is mentioned.

  The reactor of this embodiment can cover easily the whole area | region which is not contact | abutting with an attachment member, a drawer | drawing-out part, or a turn part among the surfaces of a temperature sensor by using an adhesive tape for a heat insulation member. In particular, not only the surface of the temperature sensor, but also the mounting location of the temperature sensor, that is, any one of the winding, the connection fitting, and the terminal fitting can be covered with the temperature sensor. Moreover, when an adhesive tape is equipped with sufficient heat insulation, by functioning also as a fixing member of a temperature sensor, heat insulation and fixing of a temperature sensor can be performed by one member. As mentioned above, the reactor of this embodiment is excellent in productivity.

(10) In the reactor according to the embodiment of the present invention, the heat insulating member includes a cover piece that covers the temperature sensor, and a shrinkable tube and an adhesive tape that fix the cover piece to at least one of the attached member, the drawer portion, and the turn portion. The form which is what combined at least one is mentioned.

  The reactor of this embodiment can cover a temperature sensor easily and reliably because the heat insulation member is a combination of a cover piece and at least one of a shrinkable tube and an adhesive tape. Thereby, it is expected that the heat insulation of the temperature sensor can be made stronger. Moreover, a temperature sensor and a cover piece can be easily fixed to an attachment location by using at least one of a shrinkable tube and an adhesive tape. As described above, the reactor of the present embodiment can measure the temperature of the coil more accurately and is excellent in productivity.

(11) The converter which concerns on embodiment of this invention is a converter provided with the reactor as described in said (1).

(12) A power conversion device according to an embodiment of the present invention is a power conversion device including the converter according to (11).

  The converter and power converter of this embodiment can be suitably used for in-vehicle components and the like by including a reactor that can measure the temperature of the coil more accurately.

[Details of the embodiment of the present invention]
Embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited to these embodiment, It is shown by the claim and it is intended that all the changes within the meaning and range equivalent to a claim are included. Moreover, in the following description, when the reactor is installed on the installation target, the installation side is described as the lower side, and the opposite side (opposite side) is described as the upper side.

<Embodiment 1>
A reactor 1A according to Embodiment 1 will be described with reference to FIGS.
[Overall structure of the reactor]
As shown in FIGS. 1 and 2, the reactor 1 </ b> A includes a coil 2 </ b> A, a magnetic core 3, an attachment member 4, an insulator 5, a temperature sensor 6, and a heat insulating member 7. The reactor 1A is installed so as to be immersed in a liquid refrigerant, and the coil 2A is forcibly cooled and used by the liquid refrigerant. Hereinafter, each structure with which reactor 1A is provided is demonstrated in detail.

(coil)
The coil 2A will be described with reference to FIGS. In FIG. 3, among the members constituting the reactor 1A, the coil 2A, the attached member 4, the temperature sensor 6, and the heat insulating member 7 are mainly shown, and the magnetic core 3 and the insulator 5 are omitted. The coil 2A includes a pair of coil elements 2a ₁ and 2a ₂ having the same shape. The coil elements 2a ₁ and 2a ₂ are respectively composed of individual windings 2w ₁ and 2w _2, and are configured in parallel (side by side) so that the axial directions of the coil elements 2a ₁ and 2a ₂ are parallel to each other. The coil elements 2a ₁ and 2a ₂ are wound from the turn portions 21a ₁ and 21a ₂ formed by spirally winding the windings 2w ₁ and 2w ₂ and from the end face 21e of the turn portions 21a ₁ and 21a ₂ . A pair of drawer portions 22a ₁ and 22a _{2 from} which parts of 2w ₁ and 2w ₂ are drawn out are provided. The turn parts 21a ₁ and 21a ₂ have a rectangular frame shape with rounded corners whose end face shape is rectangular. Lead portion _22a 1, 22a ₂ is winding _2w 1, 2w and terminal mounting portions 221a _1, 221a ₂ comprising _two end windings _2w 1, link end including a second end of 2w ₂ 222a _1, 222a ₂ Consists of Hereinafter, both drawer parts will be described.

The terminal mounting portions 221a ₁ and 221a ₂ draw out one end of the windings 2w ₁ and 2w ₂ from above the one end face 21e of the turn portions 21a ₁ and 21a _{2 and} are in the axial direction of the coil elements 2a ₁ and 2a _2. Thus, it is configured to be flatwise bent in a direction away from the turn portions 21a ₁ and 21a ₂ . The connecting end portions 222a ₁ and 222a ₂ draw out the other ends of the windings 2w ₁ and 2w ₂ from above the other end face 21e of the turn portions 21a ₁ and 21a ₂ , and in the axial direction of the coil elements 2a ₁ and 2a _2. Thus, it is configured by being flatwise bent in a direction away from the turn portions 21a ₁ and 21a ₂ . The terminal mounting portions 221a ₁ and 221a _{2 included in} each of the coil elements 2a ₁ and 2a ₂ and the connecting end portions 222a ₁ and 222a ₂ are drawn out in the coil axis direction so as to be parallel to each other and not in contact with each other. . The attachment member 4 (terminal fitting 41) is connected to the terminal attaching portions 221a ₁ and 221a ₂ as described later. The connecting members 222a ₁ and 222a ₂ are connected to an attachment member 4 (connecting bracket 42) described later. The portions of the lead portions 22a ₁ and 22a _{2 that} are in contact with the attachment member 4 are removed from the coverings of the windings 2w ₁ and 2w ₂ in order to ensure electrical connection with the attachment member 4.

For the windings 2w ₁ and 2w ₂ , a coated wire having an insulating coating made of an insulating material on the outer periphery of a conductor such as a flat wire or a round wire made of a conductive material such as copper, aluminum, or an alloy thereof can be suitably used. . Here, the conductor is a rectangular wire made of copper, and the insulating coating is a rectangular wire made of enamel (typically polyamideimide). The coil elements 2a _1, 2a ₂ of the present embodiment is an edgewise coil that the flat wire edgewise winding. The end face shape of the coil elements _2a 1, 2a _2, such as a circular frame shape can be suitably changed.

(Magnetic core)
The magnetic core 3 will be described with reference to FIG. The magnetic core 3 includes a pair of inner core portions 31 and 31 covered with the coil elements 2a ₁ and 2a ₂ , and a pair of outer core portions 32a and 32b that are not disposed on the coil 2 and are exposed from the coil 2. Have. Here, each of the inner core portions 31 is a columnar body having an outer shape in which corners of a rectangular parallelepiped are rounded along the inner peripheral shape of each coil element 2a. On the other hand, the outer core portions 32a and 32b are columnar bodies whose length (height) in the vertical direction is longer than the length (thickness) in the coil axis direction. In the magnetic core 3, outer core portions 32a and 32b are disposed so as to sandwich a pair of inner core portions 31 and 31 that are spaced apart from each other, and an end surface 31e of the inner core portion 31 and inner end surfaces of the outer core portions 32a and 32b. 32e and 32e are contacted to form an annular shape. When the coil 2A is excited by the pair of inner core portions 31, 31 and the pair of outer core portions 32a, 32b, a closed magnetic circuit is formed.

  The inner core portion 31 is a laminate in which a plurality of core pieces 31m made of a soft magnetic material and gap members 31g made of a material having a relative permeability smaller than that of the core piece 31m are alternately stacked. It is expected that the core piece 31m and the gap material 31g are particularly easy to handle when integrated with an adhesive, and noise can be reduced by firmly fixing the core piece 31m and the gap material 31g. In addition, it is easy to handle the core piece 31m and the gap material 31g by integrating them with an adhesive tape or the like. The outer core portions 32a and 32b are core pieces made of a soft magnetic material.

  The core pieces constituting the inner core portion 31 and the outer core portions 32a and 32b are formed of a soft magnetic powder typified by an iron group metal such as iron or an alloy thereof, an oxide containing iron, or an insulating coating. A laminated plate body in which a plurality of magnetic thin plates (for example, electromagnetic steel plates typified by silicon steel plates) are stacked is mentioned. Examples of the molded body include a compacted body, a sintered body, and a composite material obtained by injection molding or cast molding a mixture including soft magnetic powder and resin. Here, each core piece is a powder compact of soft magnetic metal powder containing iron such as iron or steel.

  The specific material of the gap material 31g is a mixture containing a nonmagnetic material such as alumina or unsaturated polyester, a nonmagnetic material such as polyphenylene sulfide (PPS) resin, and magnetic powder (for example, soft magnetic powder such as iron powder). Etc. Here, a known material can be used as the gap material 31g. The gap material 31g can be omitted when the relative magnetic permeability of the inner core portions 31, 31 and the outer core portions 32a, 32b is sufficiently small.

  Here, each core piece constituting the magnetic core 3 has the same specification (compact compact) made of a uniform material, but the inner core portion 31 and the outer core portions 32a and 32b are magnetic. Characteristics and specifications can be varied. For example, it is possible to adopt a form in which a green compact and a composite material are combined, or a form in which composite materials having different materials and mixed amounts of soft magnetic powder are combined.

In the magnetic core 3 shown in the present embodiment, the installation side surface of the inner core portion 31 and the installation side surface of the outer core portion 32 are not flush with each other, and the installation side surface of the outer core portion 32 is on the inner side. It protrudes from the core portion 31 and is flush with the surface on the installation side of the coil 2A. Therefore, the reactor 1A has a sufficiently large contact area with the installation target by being configured by the lower surfaces of the two coil elements 2a ₁ and 2a ₂ and the installation-side surfaces of the outer core portions 32a and 32b. Thereby, 1 A of reactors are excellent in stability when installing.

(Attachment)
The attachment member 4 will be described with reference to FIGS. In the present embodiment, the attachment member 4 is a member connected to a winding constituting the coil, and includes a pair of terminal fittings 41 and 41 and a coupling fitting 42. Each will be described below.

The terminal fitting 41 is connected to terminal mounting portions 221a ₁ and 221a ₂ which are one ends of windings constituting each coil element. The terminal fitting 41 is connected to an external device (not shown) such as a power source for supplying power to the coil 2A.

The connection fitting 42 connects the connection ends 222a ₁ and 222a ₂ provided in the pair of coil elements 2a ₁ and 2a ₂ , respectively. Accordingly, the pair of coil elements 2a ₁ and 2a ₂ are electrically connected, and the coil 2A can be excited by energizing the coil via the terminal fittings 41 and 41. A method of connecting the connecting end portions 222a ₁ and 222a ₂ and the connecting metal fitting 42 is not particularly limited, and for example, the connecting end portions 222a ₁ and 222a ₂ can be connected by pressure bonding or welding. In the present embodiment, the connecting metal fitting 42 is formed of a coated copper wire similar to the windings 2w ₁ and 2w ₂ forming the coil, and a pair of insertions are made by folding both ends of the plate-shaped coated copper wire. Mouth is provided. The pair of insertion holes are inserted into the connecting end portions 222a ₁ and 222a ₂ of the coil elements 2a ₁ and 2a _{2 and} are crimped to connect the connecting fitting 42 to the connecting end portions 222a ₁ and 222a _2. Yes.

  As a constituent material of the attachment member 4, a conductive material such as copper, aluminum, or an alloy thereof can be suitably used. In particular, in the connection fitting 42, it is preferable to use the same covered wire as the winding forming the coil 2A as described above. This is because the coated wire is expected to be more accurate in temperature of the coil 2A measured by the temperature sensor 6 because the thermal conductivity, conductivity, and the like are equal to those of the coil 2A.

(Insulator)
The insulator 5 will be described with reference to FIG. The insulator 5 includes four divided pieces 5a having the same shape. By combining the four divided pieces 5a, insulation between the coil 2 and the magnetic core 3 can be ensured. Each divided piece 5 a includes a rectangular frame-shaped frame portion 50 and a total of four guide portions 51. The frame-shaped part 50 is provided with through holes, and guide parts 51 are arranged so as to surround the four corners of each through hole.

  The insulator 5 can be made of an insulating material such as PPS resin, polytetrafluoroethylene (PTFE) resin, polybutylene terephthalate (PBT) resin, or liquid crystal polymer (LCP). This insulating material may contain at least one kind of ceramic filler selected from silicon nitride, alumina, aluminum nitride, boron nitride, mullite, and silicon carbide to improve the insulation and heat dissipation of the insulator 5. .

(Temperature sensor and insulation member)
The temperature sensor 6 and the heat insulating member 7 will be described with reference to FIGS. Here, the temperature sensor 6 is a rod-shaped body including a thermal element 61 such as a thermistor (upper stage in FIG. 4). The temperature sensor 6 is connected to a wiring 62 for transmitting the measured information to an external device such as a control device. A plurality of temperature sensors 6 may be provided in one reactor.

The heat insulating member 7 is a member that insulates the temperature sensor 6 from the fluid refrigerant. The heat insulating performance of the heat insulating member 7 may be any performance that can substantially insulate the temperature sensor 6 from the fluid refrigerant used. Specifically, a thermal resistance value (m ² · K / W) obtained by [thickness of heat insulating member (m) / thermal conductivity of heat insulating member (W / m · K)] is 0.01 m ² · K / What is necessary is just to select the thickness and material of the heat insulation member 7 so that it may become W or more. When the thermal resistance value of the heat insulating member 7 is equal to or higher than the above value, it is expected that the temperature sensor 6 can be substantially insulated and the temperature of the coil 2A can be measured more accurately. As will be described in the next section, the thermal resistance value may be provided with the thermal resistance value as a whole of the heat insulating member 7 when a plurality of heat insulating members are used in combination.

  In this embodiment, a cover piece 71 and a shrinkable tube 72 are used as the heat insulating member 7. Here, a resin piece 71 ′ is used as the cover piece 71. The shape of the cover piece 71 is not particularly limited as long as it can cover the temperature sensor 6. In this embodiment, it is a substantially dome-shaped member that covers a region of the surface of the thermal element 61 that is not in contact with the connection fitting 42 (middle of FIG. 4). A material having low thermal conductivity can be suitably used for the cover piece 71. This is because the temperature sensor 6 can be efficiently insulated from the fluid refrigerant. When the cover piece 71 is the resin piece 71 ′ as in the present embodiment, a resin having low thermal conductivity such as polyurethane resin or polystyrene resin can be used as the material of the resin piece 71 ′. When a material other than resin is used for the cover piece 71, a material having low thermal conductivity such as glass wool, rock wool, or foamed glass can be used as the material of the cover piece 71. The shrinkable tube 72 fixes the heat-sensitive element 61 covered with the cover piece 71 and the connection fitting 42 to which the wiring 62 is attached. Furthermore, the shrinkable tube 72 insulates the temperature sensor 6 from the fluid refrigerant depending on the material and thickness. As the contraction tube 72, a heat contraction tube and a normal temperature contraction tube can be used. In this embodiment, a heat contraction tube is used. For the shrinkable tube 72, for example, a resin having a low thermal conductivity such as a polyolefin resin or a fluororesin can be used.

  In addition to the shrinkable tube 72, for example, an adhesive tape 73 may be used for the heat insulating member 7 as shown in FIG. By using the adhesive tape 73 for the heat insulating member 7, not only the heat insulation of the temperature sensor 6 but also the fixing of the temperature sensor 6 to the connection fitting 42 can be performed simultaneously by the adhesive tape 73. At this time, two or more kinds of adhesive tapes may be used for the adhesive tape 73. For example, when the fluid refrigerant is oil, the periphery of the thermal element 61 is covered with a first adhesive tape made of a heat-insulating material, and then oil-resistant from above the wound first adhesive tape. A second adhesive tape composed of a material is coated. According to this, oil resistance can be easily added to the heat insulating member 7.

  What is necessary is just to use the heat insulation member 7 as a structure provided with heat insulation as a whole, combining and using what makes functions other than heat insulation the main function, and what makes heat insulation the main function. For example, when the cover piece 71 has sufficient heat insulation, the shrinkable tube 72 and the adhesive tape 73 may not have heat insulation. Moreover, when the shrinkable tube 72 and the adhesive tape 73 are made of a material having sufficient heat insulation, the cover piece 71 may not have heat insulation or may be omitted. When the cover piece 71 having no heat insulation is used, the cover piece 71 may have a function of protecting the temperature sensor 6 from an external impact (impact resistance) and a role of fixing the temperature sensor 6. .

  The shrinkable tube 72 and the adhesive tape 73 may be used in combination. For example, the heat sensitive element 61 may be covered with the shrinkable tube 72, and the adhesive tape 73 may be wound so as to cover the shrinkable tube 72. In this case, it is expected that the temperature sensor 6 can be prevented from shifting from the fixed position when the temperature sensor 6 is not sufficiently fixed only by the contraction tube 72. Conversely, the heat sensitive element 61 may be covered with the adhesive tape 73, and the shrinkable tube 72 may be attached so as to cover the adhesive tape 73. In this case, it is preferable that the adhesive tape 73 has a function of mainly fixing the temperature sensor 6 and that the respective materials and thicknesses are selected so that the shrinkable tube 72 functions as a main heat insulating member.

[Reactor manufacturing method]
Reactor 1A provided with the said structure can be typically manufactured as follows.

First, as shown in FIG. 2, a pair of inner core portions 31, 31 in which a core piece 31 m and a gap material 31 g are stacked and two divided pieces 50 a, 50 a are inserted into the coil elements 2 a ₁ , 2 a ₂ . Here, the outer peripheral surface of the laminated body of the core piece 31m and the gap material 31g is connected with an adhesive tape to produce the inner core portion 31 in a columnar shape. Next, the remaining divided pieces 50a and 50a are inserted into the other end faces of the coil elements 2a ₁ and 2a ₂ . The core piece 31m and the gap material 31g may be separated from each other without being integrated with an adhesive tape or an adhesive. In this case, a part of the core pieces 31m and the gap material 31g are supported by the one divided piece 50a, and the other core pieces 31m and the gap material 31g are supported by the other divided piece 50a, whereby each coil element 2a ₁ , it may be inserted into the 2a _2.

  On the other hand, as shown in the upper part of FIG. 4, the thermal element 61 of the temperature sensor 6 and a part of the wiring 62 are arranged on the connecting metal fitting 42. Next, as shown in the middle part of FIG. 4, a flowable material (here, a resin that is a material of the resin piece 71 ′) that is a material of the cover piece 71 is applied around the thermal element 61. By curing this resin, the cover piece 71 (resin piece 71 ′) is obtained. In this case, depending on the type of resin used, the effect of fixing the temperature sensor 6 to the connection fitting 42 can also be expected. In addition, the cover piece 71 is made of a resin as a material in advance in a desired shape (here, the outer shape is substantially dome-shaped, and the thermal element 61 and the wiring 62 are housed in a plane on the side in contact with the connection fitting 42. It is also possible to form the cover piece 71 on the temperature sensor 6 in advance. In this way, in particular, when the resin piece 71 ′ is used for the cover piece 71 as in this embodiment, the time for curing the resin can be omitted, and thus the productivity of the reactor 1 </ b> A is excellent. Thereafter, as shown in the lower part of FIG. 4, the shrinkable tube 72 is inserted into the connecting fitting 42, and the shrinkable tube 72 is covered with the thermal element 61 covered with the resin piece 71 ′ and a part of the wiring 62. Reduce the diameter. As a result, the temperature sensor 6 can be insulated from the cured resin piece 71 ′ and the shrinkable tube 72, and the temperature sensor 6 can be attached to the connection fitting 42 by the shrinkable tube 71. At this time, the contraction tube 72 is preferably arranged so that the fluid refrigerant (here, liquid refrigerant) does not enter the cover piece 71 from the boundary between the cover piece 71 and the connection fitting 42. The same applies to the case where the temperature sensor 6 is attached to a place (drawer and turn part) other than the connection fitting 42 and the case where an adhesive tape 73 is used instead of the shrinkable tube, as shown in an embodiment described later.

Thereafter, the insertion openings at both ends of the coupling fitting 42 are fitted into the coupling end portions 222a ₁ and 222a ₂ of both the coil elements 2a ₁ and 2a ₂ through which the inner core portions 31 and 31 are inserted, and are crimped. The outer core portions 32a and 32b are arranged on the coil 2A so that the end surfaces of both the coil elements 2a ₁ and 2a ₂ and the end surface 31e of the inner core portion 31 are sandwiched between the inner end surfaces 32e and 32e of the outer core portions 32a and 32b. . Finally, the reactor 1A can be manufactured by crimping the terminal fittings 41 and 41 to the connection portions 221a ₁ and 221a ₂ respectively.

  The manufacturing procedure of the reactor 1A is not limited to the above procedure. For example, after assembling the outer core portions 32a and 32b, the connecting fitting 42 to which the temperature sensor 6 covered with the heat insulating member 7 is attached may be attached. Further, the temperature sensor 6 may be attached to the connection fitting 42 after the connection fitting 42 is attached to the coil 2A. In this case, an adhesive tape 73 may be used for attaching the temperature sensor 6.

  The attachment of the temperature sensor 6 is not limited to the above method, and may be performed by, for example, an adhesive or a double-sided tape. Moreover, even if it is a case where the shrinkable tube 72 and the adhesive tape 73 are used as mentioned above, you may use an adhesive agent etc. together. However, when an adhesive is used, the temperature to be measured may not be accurate due to the influence of the adhesive after curing depending on the type, thickness, and the like. Therefore, when using an adhesive, it is preferable that the amount be as small as possible. From the same viewpoint, when a double-sided tape is used, it is preferable that the thickness is as thin as possible.

[effect]
(1) The reactor 1A of this embodiment can insulate a temperature sensor from a fluid refrigerant | coolant by covering the temperature sensor 6 with the heat insulation member 7, and can measure the temperature of a coil more correctly. From the above, the reactor of the present embodiment can measure the temperature of the coil 2A more accurately.

(2) Reactor 1A of this embodiment makes it easy to attach temperature sensor 6 and heat insulating member 7 by using temperature-sensitive sensor 6 as a connection fitting 42 independent of the winding. Further, as described above, when manufacturing the reactor 1A, the temperature sensor 6 can be attached and the connecting bracket 42 to which the temperature sensor 6 is attached can be assembled in an arbitrary process, so that the reactor is manufactured. High degree of assembly freedom. Furthermore, by using a configuration in which the pair of coil elements 2a ₁ and 2a ₂ that are arranged in parallel are connected by the connecting metal fitting 42, the configuration of the coil elements 2a ₁ and 2a ₂ can be made a common configuration. In addition, by using the shrinkable tube 72 and the adhesive tape 73 for the heat insulating member 7, not only the heat insulation of the temperature sensor 6 but also the fixing of the temperature sensor 6 to the connection fitting 42 can be performed by the shrinkable tube 72 and the adhesive tape 73. Therefore, it is not necessary to separately fix the temperature sensor 6 to the connection fitting 42. As mentioned above, the reactor of this embodiment is excellent in productivity.

<Embodiment 2>
In the second embodiment, a reactor 1B including a coil 2B having a configuration different from that of the first embodiment will be described with reference to FIG. In FIG. 5, the temperature sensor 6 side is on the left side of the drawing and the terminal fitting 41 side is on the right side of the drawing in order to make the mounting location of the temperature sensor 6 easier to understand. The reactor 1B according to the present embodiment basically includes the same configuration as the reactor 1A described in the first embodiment. However, the configuration of the coil 2B is different from that of the coil 2A. The point from which the temperature sensor 6 is attached and the point to which the temperature sensor 6 is attached is the drawer part 22b ₁ (connection end part 222b ₁ ), which is different from the reactor 1A of the first embodiment. Since the other points are the same as the reactor 1A of the first embodiment, the description thereof will be omitted, and the attachment location and attachment method of the coil 2B, the joining member 43, and the temperature sensor 6 will be described below.

(coil)
The coil 2B is configured by paralleling (side by side) the coil elements 2b ₁ and 2b _{2 so} that the respective axial directions are parallel. The coil elements 2b ₁ and 2b ₂ include turn portions 21b ₁ and 21b ₂ and lead portions 22b ₁ and 22b ₂ , respectively. The lead portions 22b ₁ and 22b ₂ include terminal mounting portions 221b ₁ and 221b ₂ and connecting end portions 222b ₁ and 222b ₂ . Turn portions _21b 1, _{21b 2,} and the shape of the terminal mounting part 221b _1, 221b _2, the coil elements _2a 1, the turn portions _21a 1 to 2a ₂ comprises, 21a _2, and the terminal mounting portion 221a ₁ of the embodiment 1, 221a ₂ is the same configuration. Hereinafter, each of the connecting end portions 222b ₁ and 222b ₂ will be described.

The connecting end portion 222b ₁ draws a part including one end of the winding 2w ₁ from the upper end surface of the turn portion 21b _{1 to} a position where it overlaps with the end surface of the adjacent coil element 2b ₂ and disposes the outer core portion 32b. It is constructed by bending the winding flatwise in the direction to be formed. Connecting end portion 222b ₂ includes a portion from the end face above the turn portions 21b ₂ which includes one end of the winding 2w _2, in the direction of the outer core 32b are positioned adjacent the approximate center of the upper end face of the turn portions 21b ₂ It is constructed by pulling out At this time, the connecting end portions 222b ₁ and 222b ₂ are configured to contact each other. In this contact portion, covering the windings _2w 1, 2w ₂ is provided has been removed. Thus, a pair of coil elements _2b 1, 2b ₂ are electrically connected, it is possible to energize the coil 2B.

(Joining member)
The joining member 43 is the attachment member 4 and has a function of fixing the two drawer portions 222b ₁ and 222b ₂ that are in contact with each other in a joined state. The joining member 43 secures both the lead-out portions 222b ₁ and 222b ₂ so as to ensure conduction between them. Here, the joining member 43 is a rectangular tube-shaped metal fitting, and this metal fitting is fitted into the end portions of the two drawer portions 222b ₁ and 222b ₂ that come into contact with each other, thereby ensuring conduction between the two lead portions 222b ₁ and 222b _2. .

(Temperature sensor mounting location and mounting method)
In the present embodiment, the temperature sensor 6 and the heat insulating member 7 are attached to the surface on the outer core portion 32b side of the connecting end portion 222b ₁ provided in the coil element 2b ₁ . More specifically, it is the surface on the outer core portion 32b side in the portion facing the trapezoidal space between the corner R portions of both the coil elements 2b ₁ and 2b _{2 in} the connecting end portion 222b ₁ . Thereby, the temperature sensor 6 can measure the temperature of the coil 2B. For the heat insulating member 7, it is preferable to use a shrinkable tube 72, an adhesive tape 73, and the like as in the first embodiment. This is because the temperature sensor 6 can be insulated and attached at the same time. When using a shrinkable tube 72 in the heat insulating member 7, first, providing a coil element 2b _1, placing the temperature sensor 6 to the connecting end portion 222b _1. Then, the temperature sensor 6 is attached to the connecting end portion 222b ₁ by fitting the contraction tube 72 into the connecting portion 222b ₁ in which the temperature sensor 6 is arranged to reduce the diameter. Then, the coil element 2b ₁ to which the temperature sensor 6 is attached and the coil element 2b ₂ are arranged in parallel, and the joining member 43 is attached to form the coil 2B to which the temperature sensor 6 is attached. On the other hand, when the adhesive tape 73 is used, it is only necessary to wind the adhesive tape around the connecting end portion 222b ₁ on which the temperature sensor 6 is disposed. Therefore, after the coil element 2b ₁ and the coil element 2b ₂ are joined by the joining member 43, But it is possible to mount the temperature sensor 6 to the connecting end portion 222b _1. The temperature sensor 6 may be covered with the cover piece 71 and then the shrinkable tube 72 or the adhesive tape 73 may be used.

[effect]
(1) reactor 1B of the present embodiment, by a connecting end portion 222b ₁ of the mounting position of the temperature sensor 6, easy mounting a temperature sensor 6 and the heat insulating member 7. Thereby, the temperature sensor 6 can be easily insulated from the liquid refrigerant, and the temperature of the coil 2B can be measured more accurately.

(2) Since the reactor 1B of this embodiment can attach the temperature sensor 6 by an arbitrary process, the assembly freedom at the time of manufacturing the reactor 1B is high. Furthermore, by using a configuration in which the pair of coil elements 2b ₁ and 2b ₂ arranged in parallel are joined together by the joining member 43, the pair of coil elements 2b ₁ and 2b ₂ can be easily joined. As mentioned above, the reactor 1B of this embodiment is excellent in productivity.

<Embodiment 3>
In the third embodiment, a reactor 1C including a coil 2C having a configuration different from that of the first embodiment will be described with reference to FIG. Also in FIG. 6, in order to make the attachment location of the temperature sensor 6 intelligible, the temperature sensor 6 side is made into the drawing left, and the terminal metal fitting 41 side is made into the drawing right. A reactor 1C of the present embodiment basically has the same configuration as the reactor 1A described in the first embodiment, but includes a pair of coil elements 2c ₁ and 2c _{2 in} which a coil 2C is arranged in parallel, and this coil element 2c. ₁ and 2c ₂ are formed from a series of windings 2w _3, and are provided with a bent portion 223c that does not include the connection fitting 42 but bends part of the winding 2w ₃ to connect the coil elements 2c ₁ and 2c _2. It differs from reactor 1A of form 1. Since the other points are the same as the reactor 1A of the first embodiment, the description thereof will be omitted, and the attachment location and attachment method of the coil 2C, the bent portion 223c, and the temperature sensor 6 will be described below.

(coil)
The coil 2C includes a pair of coil elements 2c ₁ and 2c ₂ formed by spirally winding a single continuous winding 2w ₃ having no joint portion, and a bent portion 223c. The coil elements 2c ₁ and 2c ₂ include a pair of terminal attachment portions 221c ₁ and 221c ₂ configured by pulling out part of the windings as turn portions 21c ₁ and 21c ₂ and a plurality of lead portions 22c, respectively. The bent portion 223c is a lead-out portions of the coil 2C, by bending a part of the winding 2w ₃ connects the coil elements _2c 1, 2c _2. Terminal mounting portion 221c _1, 221c _2, together with the pull out portion comprising an end turn portion _21c 1, 21c winding 2w ₃ from one end face above the _two (the other end), the coil element _2c 1, 2c ₂ axes It is configured to be bent in the direction in which the adjacent outer core portion 32a is disposed. The configurations of the turn portions 21c ₁ and 21c ₂ and the terminal attachment portions 221c ₁ and 221c ₂ are the same as those of the coil elements 2a ₁ and 2a _{2 of} Embodiment 1 except that they are formed from a series of windings 2w _3. turn portions comprising _21a 1, 21a ₂ and the terminal mounting portions 221a _1, a 221a ₂ a similar structure. Hereinafter, the bent portion 223c will be described.

The bent portion 223c, in one end of the coil 2C (in FIG. 6 left), are drawn out upward by bending a part of the winding 2w _3, and the winding 2w ₃ is formed by being bent in a U-shape . By providing the bent portion 223c, the pair of coil elements 2c ₁ and 2c ₂ are electrically connected, and the coil 2C can be excited.

(Temperature sensor mounting location and mounting method)
In the present embodiment, the temperature sensor 6 and the heat insulating member 7 are attached to a bent portion 223c included in the coil 2C. It is preferable to use an adhesive tape 73 for the heat insulating member 7. This is because the temperature sensor 6 can be insulated and attached at the same time. When the adhesive tape 73 is used, the adhesive tape 73 may be wound around the connecting end portion 222b ₁ where the temperature sensor 6 is disposed. Therefore, the temperature sensor 6 can be attached even after the coil 2C is wound. . Alternatively, the temperature sensor 6 may be covered using a cover piece 71 (not shown), and then the adhesive tape 73 may be wound.

[effect]
(1) The reactor 1 </ b> C of the present embodiment makes it easy to attach the temperature sensor 6 and the heat insulating member 7 by setting the attachment location of the temperature sensor 6 as the bent portion 223 c drawn from the turn portion. Thereby, the temperature sensor 6 can be easily insulated from the liquid refrigerant, and the temperature of the coil 2C can be measured more accurately.

(2) Since the reactor 1C of this embodiment can attach the temperature sensor 6 in an arbitrary process after forming the coil 2C, the degree of freedom of assembly when manufacturing the reactor 1C is high. For example, even after the outer core portion 32b and the inner core portion (not shown) are assembled, if the adhesive tape 73 is used, the temperature sensor 6 can be insulated and fixed. Furthermore, when a pair of coil elements 2c ₁ and 2c ₂ are formed from a series of windings 2w ₃ , when attaching the temperature sensor 6 or the heat insulating member 7, no other member other than the winding 2w ₃ is required, not necessary work of connecting the separate member to the coil element _2c 1, _{2c 2.} As mentioned above, the reactor 1C of this embodiment is excellent in productivity.

<Embodiment 4>
In the fourth embodiment, a reactor 1D including a coil 2D having a configuration different from that of the third embodiment will be described with reference to FIG. The reactor 1D of the present embodiment basically has the same configuration as the reactor 1C described in the third embodiment, but the terminal mounting portions 221d ₁ and 221d ₂ provided in the coil elements 2d ₁ and 2d ₂ forming the coil 2D. And the point where the temperature sensor 6 is attached to the terminal attachment portion 221d ₁ is different from the reactor 1C of the third embodiment. Since the other points are the same as those of the reactor 1C of the third embodiment, the description thereof will be omitted, and the following description will be made on the mounting location and the mounting method of the coil 2D, the terminal mounting portions 221d ₁ and 221d ₂ , and the temperature sensor 6.

(coil)
The coil 2D has almost the same configuration as the coil 2C described in the third embodiment, but the terminal mounting portions 221d ₁ and 221d ₂ included in the coil elements 2d ₁ and 2d ₂ are terminals in the direction in which the outer core portion 32a is disposed. The difference is that the mounting portions 221c ₁ and 221c ₂ are drawn out longer. Thus, with the configuration in which the drawer long terminal mounting portion 221d _1, 221d _2, it is possible to secure a space for mounting the temperature sensor 6 and the heat insulating member 7 in the vicinity of the terminal fitting 41.

(Temperature sensor mounting location and mounting method)
In this embodiment, the temperature sensor 6 and the heat insulating member 7 is attached to the terminal mounting portion 221d ₁ provided in the coil 2D. When the shrinkable tube 72 is used for the heat insulating member 7, the temperature sensor 6 can be insulated and attached by inserting the shrinkable tube 72 into the terminal attachment portion 221 d ₁ before attaching the terminal fitting 41. Further, by leaving fitted shrink tubing 72 before mounting the terminal fitting 41 into the terminal mounting portion 221d _1, there is no need to use a large shrink tubing diameter more than necessary. On the other hand, when the adhesive tape 73 is used, the temperature sensor 6 can be attached even after the terminal fitting 41 is attached because the adhesive tape 73 is wound around the terminal attachment portion 221d ₁ where the temperature sensor 6 is disposed. Of course, the temperature sensor 6 may be mounted to the terminal mounting portion 221d _2.

[effect]
(1) Reactor 1D of this embodiment makes it easy to attach temperature sensor 6 or heat insulating member 7 by setting temperature sensor 6 as a terminal attachment portion 221d ₁ that is an end of a winding. Thereby, the temperature sensor 6 can be easily insulated from the liquid refrigerant, and the temperature of the coil 2D can be measured more accurately.

(2) Since the reactor 1D of this embodiment can attach the temperature sensor 6 in an arbitrary process after forming the coil 2D, the degree of freedom of assembly when manufacturing the reactor 1D is high. Therefore, the reactor 1D of this embodiment is excellent in productivity.

<Embodiment 5>
In the fifth embodiment, the attachment location of the temperature sensor 6 will be described with reference to FIG. The reactor 1E of the present embodiment is different from the reactor 1C of the third embodiment in that the shape of the terminal fittings 41 ′ and 41 ′ and the attachment location of the temperature sensor 6 are the terminal fitting 41 ′. Since the other points are the same as the reactor 1C of the third embodiment, the description thereof will be omitted, and hereinafter, the mounting locations and mounting methods of the terminal fittings 41 ′ and 41 ′ and the temperature sensor 6 will be described.

(Terminal bracket)
The terminal fitting 41 ′ has almost the same shape as the terminal fitting 41 provided in the reactor of the other embodiment, except that the portion facing the upper surface of the outer core portion 32a is extended in the axial direction of the coil 2C. Thereby, the temperature sensor 6 can be attached to this part.

(Temperature sensor mounting location and mounting method)
In the present embodiment, the temperature sensor 6 and the heat insulating member 7 are attached to one of the terminal fittings 41 ′ and 41 ′ included in the reactor 1E. The temperature sensor 6 is attached to the terminal fitting 41 ′ as follows. First, a thermal element (not shown) of the temperature sensor 6 and a part of the wiring 62 are arranged on the terminal fitting 41 ′. Then, if necessary, a resin (not shown) is applied around the thermal element, and the resin is cured. Thereafter, the heat-sensitive element covered with the resin and a part of the wiring 62 are wound with the adhesive tape 73. Thereby, while being able to insulate the temperature sensor 6 with the hardened resin and the adhesive tape 73, the temperature sensor 6 can be attached to the terminal fitting 41 ′ with the adhesive tape 73. Note that heat insulation and attachment may be performed using the shrinkable tube 72 in the same manner as in the first embodiment.

[effect]
In the reactor 1E of this modification, the temperature sensor 6 and the heat insulating member 7 can be easily attached by setting the attachment location of the temperature sensor 6 to the terminal fitting 41 'independent of the winding. Further, when manufacturing the reactor 1E, the temperature sensor 6 can be attached and the terminal fitting 41 'to which the temperature sensor 6 is attached can be assembled in an arbitrary process, so that the degree of freedom in assembly when the reactor 1E is manufactured. Is expensive. As mentioned above, the reactor 1E of this embodiment is excellent in productivity.

<Embodiment 6>
In the sixth embodiment, the attachment location of the temperature sensor 6 will be described with reference to FIG. Reactor 1F of the present embodiment basically has the same configuration as the reactor 1D of embodiment 4, the point attachment points of the temperature sensor 6 is turn portion 21d ₁ is reactor 1D of the fourth embodiment And different. Since the other points are the same as the reactor 1D of the fourth embodiment, the description thereof will be omitted, and the mounting location and mounting method of the temperature sensor 6 will be described below.

(Temperature sensor mounting location and mounting method)
In this embodiment, the temperature sensor 6 and the heat insulating member 7 is attached to the upper surface of Tatan portion 21d ₁ provided in the coil 2D. As long as the temperature sensor 6 can be attached not only to the top surface but also to the side portions or the corner R portions, etc., the temperature sensor 6 can be covered with the heat insulating member 7, it can be attached to any of the turn portions 21d ₁ and 21d _2. Good.

As in the present embodiment, when a coil 2D in which a flat wire is edgewise wound in a rectangular tube shape is used, a planar portion is formed on the outer peripheral surfaces of the turn portions 21d ₁ and 21d ₂ . In particular, when the coil 2D is tightly wound so that there is substantially no gap between turns, this plane portion can easily secure a contact area with the sensor 6, and thus the temperature sensor 6 can be easily installed. Therefore, in this embodiment, it is mounted a temperature sensor 6 in which is part upper surface of the turn portions 21d ₁ of the planar portion. On the other hand, when the temperature sensor 6 is attached to the corner R portion of the turn portion 21d ₁ , the corner R portion is configured by a curved surface, and therefore the installation surface of the temperature sensor 6 (the installation surface of the thermal element) is along the curved surface. It is preferable to use a curved surface. Thereby ensuring the contact area between the sensor 6 and the turn portions 21d ₁ easily. Of course, it may be attached to these locations in the turn portions 21d _2.

Mounting of the temperature sensor 6 to the turn portions 21d ₁ is performed as follows. First, to place a portion of the heat sensitive element (not shown) and the wiring 62 of the temperature sensor 6 on the turn portion 21d _1. At this time, between the temperature sensor 6 and the turn portions 21d _1, using an adhesive or double-sided tape or the like, for fixing the temperature sensor 6 to the turn portions 21d _1. In order to accurately measure the temperature generated in the coil 2D, it is preferable to use a material having high thermal conductivity for the adhesive and the double-sided tape. Then, if necessary, a resin (not shown) is applied around the thermal element, and the resin is cured to form a cover piece (resin piece). Thereafter, the adhesive tape 73 is attached to the resin piece and a part of the wiring 62. Thereby, the temperature sensor 6 can be thermally insulated by the resin piece and the adhesive tape 73. Further, the adhesive tape 73, the mounting of the temperature sensor 6 to the turn portions 21d _1, can be made even stronger. If the temperature sensor 6 can be sufficiently fixed by the adhesive tape 73, an adhesive, a double-sided tape, or the like may be omitted. In this case, since there is no inclusions between the temperature sensor 6 and the turn portions 21d _1, it is expected to more accurately to measure the temperature of the coil 2D. Further, the adhesive or double-sided tape, fixed sufficiently performed to the turn portions 21d ₁ of the temperature sensor 6, and, in the case where only the resin piece can be sufficiently insulate the temperature sensor 6, eliminating the need for adhesive tape 73 You can also In this case, the productivity at the time of manufacture is excellent.

[effect]
(1) The reactor 1E of this embodiment makes it easy to attach the temperature sensor 6 and the heat insulating member 7 by using the turn part 21d ₁ as the attachment location of the temperature sensor 6. Thereby, the temperature sensor 6 can be easily insulated from the liquid refrigerant, and the temperature of the coil 2D can be measured more accurately.

(2) Since the reactor 1E of this embodiment can attach the temperature sensor 6 in an arbitrary process after forming the coil 2D, the degree of freedom of assembly when manufacturing the reactor 1E is high. Therefore, the reactor 1E of this embodiment is excellent in productivity.

<Embodiment 6>
In the sixth embodiment, a converter and a power conversion device according to the embodiment will be described with reference to FIGS. 10 and 11. The converter and the power conversion device include any of the reactors shown in the first to sixth embodiments.

  The reactors shown in the first to sixth embodiments have applications in which energization conditions are, for example, maximum current (direct current): about 100 A to 1000 A, average voltage: about 100 V to 1000 V, and usage frequency: about 5 kHz to 100 kHz. Specifically, it can be used as a component part of a converter mounted on a vehicle such as an electric vehicle or a hybrid vehicle, or a component part of a power conversion device including this converter. In this application, it is expected that an inductance satisfying 10 μH or more and 2 mH or less of the inductance when the DC current is 0 A and 10% or more of the inductance when the maximum current is applied is 10% or more can be suitably used.

  For example, a vehicle 1200 such as a hybrid vehicle or an electric vehicle is driven for driving by being driven by a main battery 1210, a power converter 1100 connected to the main battery 1210, and power supplied from the main battery 1210 as shown in FIG. The motor (load) 1220 is provided. The motor 1220 is typically a three-phase AC motor, which drives the wheel 1250 when traveling and functions as a generator during regeneration. In the case of a hybrid vehicle, vehicle 1200 includes an engine in addition to motor 1220. In addition, in FIG. 10, although an inlet is shown as a charge location of the vehicle 1200, it is good also as a form provided with a plug.

  Power conversion device 1100 includes converter 1110 connected to main battery 1210 and inverter 1120 connected to converter 1110 and performing mutual conversion between direct current and alternating current. Converter 1110 shown in this example boosts the DC voltage (input voltage) of main battery 1210 of about 200V to 300V to about 400V to 700V and supplies power to inverter 1120 when vehicle 1200 is traveling. In addition, converter 1110 steps down DC voltage (input voltage) output from motor 1220 via inverter 1120 to DC voltage suitable for main battery 1210 during regeneration, and causes main battery 1210 to be charged. The inverter 1120 converts the direct current boosted by the converter 1110 into a predetermined alternating current when the vehicle 1200 is running, and supplies the motor 1220 with electric power. During regeneration, the alternating current output from the motor 1220 is converted into direct current and output to the converter 1110. doing.

  As shown in FIG. 11, the converter 1110 includes a plurality of switching elements 1111, a drive circuit 1112 that controls the operation of the switching elements 1111, and a reactor L, and converts input voltage by ON / OFF repetition (switching operation). (In this case, step-up / down pressure). As the switching element 1111, a power device such as a field effect transistor (FET) or an insulated gate bipolar transistor (IGBT) is used. The reactor L has the function of smoothing the change when the current is going to increase or decrease by the switching operation by utilizing the property of the coil that prevents the change of the current to flow through the circuit.

  Here, the vehicle 1200 is connected to the converter 1110, the power supply converter 1150 connected to the main battery 1210, and the sub-battery 1230 and the main battery 1210 that are power sources of the auxiliary devices 1240. Auxiliary power supply converter 1160 for converting the high voltage 1210 to a low voltage is provided. The converter 1110 typically performs DC-DC conversion, while the power supply device converter 1150 and the auxiliary power supply converter 1160 perform AC-DC conversion. Some power supply device converters 1150 perform DC-DC conversion. The reactors of the power supply device converter 1150 and the auxiliary power supply converter 1160 have the same configuration as the reactors of the above-described embodiments and modifications, and a reactor whose size and shape are appropriately changed can be used. In addition, the reactor of the above-described embodiment can be used for a converter that performs conversion of input power and that only performs step-up or converter that performs only step-down.

  In addition, this invention is not limited to embodiment mentioned above, It can change suitably in the range which does not deviate from the summary of this invention. For example, a plurality of temperature sensors may be provided, and a reactor may be configured by combining the embodiments. In addition, the coil is not limited to one constituted by a pair of coil elements, and one constituted by one coil element may be used. Furthermore, the present invention can be applied to the case of using other sensors for measuring physical quantities during operation of the reactor, such as current sensors, voltage sensors, and acceleration sensors capable of measuring reactor vibration, in addition to the temperature sensor. In this case, instead of the heat insulating member in the present invention, a protective member that protects the sensor from disturbances affecting the measurement of the physical quantity may be used.

  The reactor of this invention can measure the temperature of a coil more correctly. Therefore, it can be suitably used for a component part of a power conversion device such as a bidirectional DC-DC converter mounted on a vehicle such as a hybrid vehicle, an electric vehicle, or a fuel cell vehicle.

1A, 1B, 1C, 1D, 1E, 1F reactors 2A, 2B, 2C, 2D coil _{2a 1, 2a 2, 2b 1} , 2b 2, 2c 1, 2c 2,
2d ₁ , 2d ₂ coil elements 21a ₁ , 21a ₂ , 21b ₁ , 21b ₂ ,
21c ₁ , 21c ₂ , 21d ₁ , 21d ₂ Turn part 21e End surface 22a ₁ , 22a ₂ 22b ₁ , 22b ₂ 22c Lead part 221a ₁ , 221a ₂ , 221b ₁ , 221b ₂ ,
221c ₁ , 221c ₂ , 221d ₁ , 221d ₂ terminal mounting part 222a ₁ , 222a ₂ , 222b ₁ , 222b ₂ connecting end part 223c bent part 2w ₁ , 2w ₂ , 2w ₃ winding 3 magnetic core 31 inner core part
31e End face 31m Core piece 31g Gap material 32a, 32b Outer core part 32e Inner end face 4 Attached member 41, 41 'Terminal fitting 42 Connecting fitting 43 Joining member 5 Insulator 5a Split piece 50 Frame-like part 51 Guide part 6 Temperature sensor 61 Thermosensitive element 62 wiring 7 heat insulating member 71 cover piece 71 'resin piece 72 shrinkable tube 73 adhesive tape 1100 power conversion device 1110 converter 1111 switching element 1112 drive circuit L reactor 1120 inverter 1150 converter for power supply device 1160 converter for auxiliary power supply 1200 vehicle 1210 main battery 1220 Motor 1230 Sub-battery 1240 Auxiliary machinery 1250 Wheel

Claims (12)

A magnetic core;
A coil having a turn part configured by winding a winding and through which a part of the magnetic core is inserted, and a lead part that draws a part of the winding from an end surface of the turn part;
An attachment member attached to at least one end of the winding;
A temperature sensor attached to at least one of the attachment member, the lead-out portion, and the turn portion and measuring the temperature of the coil;
A reactor comprising: a heat insulating member that insulates the temperature sensor from a fluid refrigerant that forcibly cools the coil. The coil includes a pair of coil elements arranged in parallel, each coil element is formed from a separate winding,
The drawer is
One lead-out portion which is one end side of the winding of one of the coil elements;
The other lead portion which is one end side of the winding of the other coil element,
The attachment member includes a connection fitting that connects the two drawer parts that are not in contact with each other;
The reactor according to claim 1, wherein the attachment location of the temperature sensor is the connection fitting. The coil includes a pair of coil elements arranged in parallel, each coil element is formed from a separate winding,
The drawer is
One lead-out portion which is one end side of the winding of one of the coil elements;
The other lead portion which is one end side of the winding of the other coil element,
The attachment member includes a joining member that joins the two drawer portions that are in contact with each other,
The reactor according to claim 1, wherein an attachment location of the temperature sensor is one of the two drawer portions. The coil comprises a pair of coil elements arranged in parallel, both coil elements being formed from a series of windings,
The lead portion includes a bent portion that bends part of the winding and connects both coil elements,
The reactor according to claim 1, wherein the temperature sensor is attached to the bent portion. The accessory member includes a terminal fitting connected to an end of the winding,
The location where the temperature sensor is attached is the drawer.
The reactor according to claim 1, wherein the lead portion is in the vicinity of the terminal fitting in the winding. The accessory member includes a terminal fitting connected to an end of the winding,
The reactor according to claim 1, wherein the attachment location of the temperature sensor is the terminal fitting.   The reactor according to claim 1, wherein the temperature sensor is attached to the turn portion.   The reactor according to any one of claims 1 to 7, wherein the heat insulating member includes a shrinkable tube.   The reactor according to any one of claims 1 to 7, wherein the heat insulating member includes an adhesive tape.   The heat insulating member is a combination of a cover piece that covers the temperature sensor, and at least one of a shrinkable tube and an adhesive tape that fixes the cover piece to at least one of the accessory member, the drawer portion, and the turn portion. The reactor according to any one of claims 1 to 7.   A converter comprising the reactor according to claim 1.   A power converter device comprising the converter according to claim 11.

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