JP2018207084A - Reactor device - Google Patents

Abstract

To provide a reactor device housing multiple reactors in which temperature rise of individual reactors is restrained.SOLUTION: A reactor device includes a metal case 4 having an open top face for housing reactors A-C. Each reactor A-C has an annular core 1 including multiple legs 16, 17, and a yoke connecting them. A coil 5 is wound around at least one leg. Each reactor A-C is arranged in the case 4 so that the axial direction of the coil 5 is perpendicular to the case bottom plate 47, and the reactors A-C are arranged so that at least a part of the side peripheral surface thereof faces the inner peripheral surface of the case 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a reactor device including a plurality of reactors each having a core housed in a case.

  Reactors are used in various applications including drive systems for hybrid vehicles and electric vehicles. For example, a reactor in which a coil is wound around a resin bobbin disposed around a core is often used as a reactor used in an in-vehicle booster circuit.

  This type of reactor has a core and a coil attached to a part of the core. A plurality of the reactors are accommodated in a metal case, and a filler is filled and solidified in the case to constitute one reactor device. That is, a plurality of reactors are disposed in the reactor device, and the filler is filled and solidified in the gaps between the storage spaces of the respective reactors.

JP2013-026420A

  As a method for arranging reactors in a reactor apparatus that accommodates a plurality of reactors in one case, a method of arranging the reactors in parallel is known. That is, the reactors are arranged so that predetermined side peripheral surfaces of the reactors are parallel to each other. By arranging in this way, the relative postures of the respective reactors with respect to the case are matched, so that the position of the connection terminal connected to the coil can be easily grasped.

  FIG. 13 is a perspective view of a reactor device in which each reactor is accommodated in one case so that side peripheral surfaces of a plurality of reactors are arranged in parallel. As shown in FIG. 13, in the reactor device, reactors A, B, and C are arranged in parallel in the case. In such a reactor device, when the coils of the reactors generate heat, the heat generated from the coils is transmitted to the core and the case and diffused from the outer peripheral surface of the case. Here, one side of the reactor including the coil and the leg is defined as a side peripheral surface of the reactor. The coil and core on the side peripheral surface of the reactor face the case in a wide area. Therefore, it is easy to transfer the heat generated in the reactor to the case.

  Here, as shown in FIG. 13, when reactors A, B, and C are arranged in parallel in the case, one of the side peripheral surfaces of reactors A and C faces the case. Therefore, the heat generated by reactors A and C is transmitted to the case from the side peripheral surface serving as a heat radiating surface. On the other hand, the side peripheral surface of the reactor B faces the reactors A and C. Therefore, the heat generated by the reactor B is transmitted to the reactors A and C from the side peripheral surface. Since the heat generated in the coil of the reactor B is difficult to be transmitted to the case, there is a problem in that the reactor B is not sufficiently radiated and the reactor device is likely to become high temperature.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a reactor device that improves the heat dissipation efficiency of a plurality of reactors arranged therein and suppresses temperature rise. .

  The reactor of the present invention is a reactor device including three or more reactors each having a core and a coil, and the reactor device includes a metal case having an upper surface that accommodates the reactor, and each of the reactors includes Each of the leg portions has a coil wound around the at least one leg portion, and each of the reactors has an axial direction of the coil. It is arrange | positioned at the said case so that it may become perpendicular | vertical to the baseplate of the said case, and a reactor is arrange | positioned in the direction in which at least one part of the side peripheral surface of the said reactor opposes the internal peripheral surface of a case.

  ADVANTAGE OF THE INVENTION According to this invention, the reactor apparatus which suppressed the temperature rise of each reactor arrange | positioned inside can be obtained.

1 is an overall perspective view of a reactor device according to a first embodiment. It is a disassembled perspective view of the reactor apparatus which concerns on 1st Embodiment. It is a disassembled perspective view of the reactor which concerns on 1st Embodiment. It is alpha-alpha sectional drawing of the reactor apparatus which concerns on 1st Embodiment. It is a perspective view which shows the structure of a core. It is alpha-alpha sectional drawing of the reactor apparatus which concerns on 1st Embodiment. It is sectional drawing of the reactor apparatus which concerns on 1st Embodiment. It is a figure which shows distribution of the temperature state in the conventional reactor apparatus. It is a figure which shows distribution of the temperature state in the reactor apparatus which concerns on 1st Embodiment. It is alpha-alpha sectional drawing of the reactor apparatus which concerns on the modifications 1 and 2 of 1st Embodiment. It is alpha-alpha sectional drawing of the reactor apparatus which concerns on the modification 3 of 1st Embodiment. It is alpha-alpha sectional drawing of the reactor apparatus which concerns on the modification 4 of 1st Embodiment. It is the top view and whole perspective view of the conventional reactor apparatus.

  Hereinafter, a reactor according to an embodiment of the present invention will be described with reference to the drawings.

[1. First Embodiment]
[1-1. Schematic configuration]
FIG. 1 is an overall perspective view of the reactor device according to the first embodiment. FIG. 2 is an exploded perspective view of the reactor device according to the first embodiment. FIG. 3 is an exploded perspective view of the reactor arranged in the reactor device according to the first embodiment. FIG. 4 is an α-α cross-sectional view of the reactor device according to the first embodiment.

  The reactor device includes a plurality of reactors. The number of reactors included in the reactor device can be any number as long as it is three or more. In the present embodiment, for the sake of explanation, it is assumed that three reactors A to C are arranged in the reactor device. The reactor device is an electromagnetic component that converts electric energy into magnetic energy and stores and discharges it, and is used for voltage step-up / step-down and the like. The reactor according to the present embodiment is a large-capacity reactor used in, for example, a drive system for a hybrid vehicle or an electric vehicle. The reactor device is a main component of a booster circuit mounted on these automobiles.

  As shown in FIGS. 1 to 5, the reactor device according to this embodiment includes reactors A to C, a case 4, and a filling molding unit 6. Reactors A to C each include a core 1, a resin member 2, and a coil 5.

  The core 1 includes an upper core 1A and a lower core 1B. The resin member 2 includes an upper cover 2A that covers the upper core 1A and a lower cover 2B that covers the lower core 1B. Reactors A to C are formed by fitting the upper core 1A covering the upper cover 2A and the lower core 1B covering the lower cover 2B and fitting the coil 5 into the middle leg portion. Reactors A to C are arranged in a case, and a filling device 6 is formed by filling and solidifying a filler, thereby forming a reactor device.

[1-2. Detailed configuration]
The detailed structure of each part of the reactor of this embodiment is demonstrated below. In this specification, the z-axis direction shown in FIG. 1 is the “upper” side, and the opposite direction is the “lower” side. In describing the configuration of each member, “lower” is also referred to as “bottom” or “back”. “Upper” and “lower” refer to the positional relationship between the components of the reactor, and do not refer to the positional relationship or direction when the reactor is mounted on an actual machine.

(Reactor)
The core 1 that constitutes the reactor is an annular core that includes a magnetic material. As the core 1, a ferrite core, a laminated steel plate, a dust core, or a metal composite core can be used. The metal composite core is a core formed by molding a magnetic material obtained by mixing magnetic powder and resin with a mold, and is a core that has not been annealed. Here, the core 1 is a dust core.

  As shown in FIG. 5, the core 1 is configured by joining an upper core 1A and a lower core 1B. The upper core 1A and the lower core 1B are E-shaped cores having an E shape, and the same E-shaped core is used. The E-shaped core includes a central middle leg 15, outer legs 16 and 17 provided on both sides of the middle leg 15 in parallel with the middle leg 15, and a yoke 18 that connects the legs 15 to 17. .

  In the upper core 1A and the lower core 1B, the middle leg 15 constitutes the middle leg part to which the coil 5 is attached, the outer legs 16 and 17 constitute the outer leg part, and the yoke 18 constitutes the yoke part. The outer legs 16 and 17 of the upper core 1A and the lower core 1B are in contact with each other by an adhesive or the like, and the middle legs 15 of the upper core 1A and the lower core 1B are separated from each other, and there is a gap. To do.

  That is, the core 1 has a substantially θ shape, a middle leg portion on which the coil 5 is mounted, a pair of outer leg portions extending in parallel with the middle leg portion on both sides of the middle leg portion, and the middle leg portion and the outer leg portion. And a yoke part connecting the two. When the coil 5 is energized, a magnetic flux is generated in the air core portion of the coil 5, and the generated magnetic flux returns from the middle leg portion to the middle leg portion via the yoke portion and the outer leg portion to form a closed magnetic path.

  As shown in FIG. 3, the resin member 2 covers the periphery of the core member to form the core 1 and is joined to the case 4. The resin member 2 has an upper cover 2A that covers at least a part around the upper core 1A and a lower cover 2B that covers at least a part around the lower core 1B. Each of the upper cover 2A and the lower cover 2B is made of resin. As the resin, for example, an epoxy resin, an unsaturated polyester resin, a urethane resin, BMC (Bulk Molding Compound), PPS (Polyphenylene Sulfide), PBT (Polybutylene Terephthalate), or the like can be used.

  The upper cover 2A covers at least a part of the periphery of the upper core 1A. The upper cover 2A is provided with openings through which the end surfaces of the middle leg 15 and the outer legs 16 and 17 are exposed. Further, the upper cover 2A is provided with a fixing portion 21 for fixing the upper core 1A to the case 4, and the fixing portion 21 is provided with a screw insertion hole 21a. The upper core 1 </ b> A is fixed to the case 4 by inserting the screw 91 into the screw insertion hole 21 a and fastening the screw.

  Further, end portions 51a and 51b of the coil 5 are drawn out from the upper surface of the reactor. The end portions 51a and 51b are in contact with one end of the connection terminal 52a. The other end of the connection terminal 52a is fitted into the terminal fixing portion 22 and fixed. The upper cover 2A is provided with a terminal fixing portion 22 for fixing the connection terminal 52a connected to the end portions 51a and 51b. The terminal fixing portion 22 is erected so as to extend outward from the side surface of the reactor. In other words, in the reactor A of FIG. 1, the terminal fixing portion 22 extends in a direction substantially orthogonal to the side surface of the reactor so as to extend in the y-axis direction.

  The lower cover 2B covers at least a part of the periphery of the lower core 1B. As shown in FIG. 3, the lower cover 2B is provided with openings through which the end surfaces of the middle leg 15 and the outer legs 16, 17 are exposed.

  The upper cover 2A and the lower cover 2B are configured by resin molding using the upper core 1A or the lower core 1B as an insert, and the upper cover 2A and the lower cover 2B are made of the same resin.

  The coil 5 is a conducting wire having an insulating coating. In the present embodiment, the coil 5 is a flat wire edgewise coil. However, the wire material and winding method of the coil 5 are not limited to the rectangular wire edgewise coil, and may be in other forms.

  The coil 5 is attached to the middle leg portion of the core 1. In this case, when reactors A to C are arranged in the case, the winding axis of coil 5 is in the z-axis direction shown in FIG. Further, both end portions 51 a and 51 b of the coil 5 are pulled out above the reactor, and are connected to wiring of an external device such as an external power source via a connection terminal 52 a fixed to the terminal fixing portion 22. The fixing screw 53 is used to fix the connection terminal 52a and the wiring of the external device.

(Reactor device)

  The reactor device includes reactors A to C, a case 4, and a filling molding unit 6. Case 4 is a container that houses reactors A to C. The case 4 is made of a metal excellent in heat dissipation and thermal conductivity, and has heat dissipation. The heat generated in the reactors A to C is dissipated to the outside of the case 4 by being transmitted to the case 4 via the filling molding part 6. The case 4 is made of a metal having high thermal conductivity and light weight, such as aluminum or an aluminum alloy, in order to obtain a good heat dissipation efficiency, and a part of the surface of the case 4 is roughened. It may be.

  As shown in FIGS. 2 and 7, the case 4 has a substantially rectangular parallelepiped shape with an upper surface opened. The case 4 is a box-shaped member having one surface opened. The case 4 includes a case bottom plate 47 provided at a position facing the opening 45, and a case side surface 46 connected to the case bottom plate 47. The case 4 is provided with a space for arranging the reactor therein. The inner surface of the case 4 is the inner surface of the case 4, that is, the surface facing the space where the reactor of the case side surface 46 is disposed.

  The opening 45 is an opening provided in the upper portion of the case 4. The dimensions of the opening are such that the reactors A to C in which the axial direction of the coil is perpendicular to the case bottom plate 47 (the direction of arrow B in FIG. 7) can be accommodated in the opening. A case bottom plate 47 is located at the bottom portion of the case 4. Case bottom plate 47 serves as a reference when reactors A to C are arranged in the case. The case side surface 46 is erected vertically from the entire periphery of the case bottom plate 47. However, if the position of the opening 45 can be relatively fixed with respect to the case bottom plate 47, the erected portion and angle are arbitrary. can do. Further, the case side 46 does not need to rise vertically and may rise at an acute angle or an obtuse angle.

  The case 4 has a recessed portion 48 in which the reactors A to C are arranged in the case bottom plate 47 portion. The recessed portion 48 has a shape along the shape of the reactors A to C. By making the recessed part 48 into such a shape, the case 4 formed of a metal having good thermal conductivity can be brought close to the reactors A to C. Thereby, since it becomes possible to transmit the heat which generate | occur | produced with reactor AC to the case 4, the heat dissipation of a reactor apparatus can be improved. When the reactors A to C are arranged in the recess 48, the reactors A to C and the case are provided with a predetermined clearance, but are arranged at a distance of about 2.0 mm in consideration of ensuring insulation and the flow of the filler. It is desirable that The recessed portion 48 includes a case side surface 46, three projecting portions 41, 42, and 43 projecting from the inside of the case side surface 46 toward the inside of the case 4, and a projecting portion 41 a standing from the case bottom plate 47.

  When reactors A to C are arranged, the inner peripheral surface of the case facing the side peripheral surfaces of reactors A to C has a shape along the side peripheral surface of the reactor.

  The protruding portion 41 separates the reactor B and the reactor C from each other. The protruding portion 41 is a wall that protrudes from the case side surface 46 in the y-axis direction while standing from the case bottom plate 47 in the z-axis direction. When the reactor B and the reactor C are arrange | positioned at a case, the side surface of the x-axis direction of the protrusion part 41 is the outer leg 17 of the reactor B, and the outer leg 17 of the reactor C among the side peripheral surfaces of the reactor B and the reactor C. Opposite. Moreover, the front-end | tip part of the protrusion part 41 extended in a y-axis direction opposes the coil 5 of the reactor B and the reactor C. FIG. The tip portion of the protruding portion 41 has a shape along the shape of each reactor. For example, the portion of the tip portion of the protruding portion 41 that faces the reactor B has an R that matches the shape of the coil of the reactor B.

  The protrusions 42 and 43 are walls that protrude in the x-axis direction from the case side surface 46 while standing from the case bottom plate 47 in the z-axis direction. Protruding part 42 separates between reactor A and reactor B, and projecting part 43 separates between reactor A and reactor C. For example, when the reactor A and the reactor C are arranged in the case, the side surface of the protrusion 43 on the reactor C side in the y-axis direction faces the outer leg 16 of the reactor C. Further, the side surface of the protrusion 43 on the side of the reactor A in the y-axis direction faces the outer leg 16 of the reactor A. Further, the tip portion of the protruding portion 43 extending in the x-axis direction has an R according to the shape of the coil of the reactor A. The same applies to the projecting portion 42 disposed between the reactor A and the reactor B. Each projecting portion 41 to 43 is made of a metal made of the same metal as that of the case 4 and surrounds the reactors A to C to form an accommodation space for the reactors A to C.

  In a region where the reactors A to C face each other, a protruding portion 41a is provided to stand from the case bottom plate 47 in the z-axis direction. The shape of the protrusion 41a is a shape along the shape of the side surfaces of the opposing reactors A to C. The protrusion 41a has a pentagonal shape and faces the leg portions of the reactor B and the reactor C on the side surface in the x-axis direction. Further, one side surface in the y-axis direction faces the coil of the reactor A, and two surfaces projecting in the y-axis direction face the reactor B and the coil in the reactor C. The shape of the two surfaces protruding in the y-axis direction is a shape along the shape of the coils of the reactor B and the reactor C.

  The filling molding unit 6 is formed by filling and solidifying a filling material in a space in the accommodation space of the reactor body surrounded by the case 4. As the filler, a resin that is relatively soft and has high thermal conductivity is suitable for ensuring the heat dissipation performance of the reactor and reducing the vibration propagation from the reactor to the case 4. Moreover, it is preferable that a filler has insulation.

(Reactor arrangement)
As shown in FIG. 4, reactors A to C are arranged in case 4. Reactors A to C are arranged in the case so that the axial direction of the coil is perpendicular to case bottom plate 47, and at least a part of the side peripheral surface of the reactor is arranged in a direction facing the inner peripheral surface of case 4. . The arranged reactors A to C are fixed to a fixing portion 44 provided in the case 4 by fixing screws 91.

  The side peripheral surfaces of the reactors A to C are one side of the reactor in which the coil 5 and the core 1 face the case 4. Moreover, when the core 1 of the reactors A to C is E-shaped, the side peripheral surfaces of the reactors A to C are one side of the reactors A to C extending in the longitudinal direction. That is, in FIG. 4, it becomes a surface including the long side in the cross section of the x-axis and y-axis direction of a reactor, and extending in the y-axis direction. The side peripheral surfaces of reactors A to C transfer the heat of reactors A to C to case 4.

  Moreover, the side peripheral surface of the reactor A is orthogonally crossed with the side peripheral surface of the reactor B and the reactor C, and the reactor B and the side peripheral surface of the reactor C are arrange | positioned in parallel. In FIG. 6, the side surrounding surface of reactor AC is shown. The side circumferential surface of the reactor A is Xa, the side circumferential surface of the reactor B is Ya, and the side circumferential surface of the reactor C is Za. As shown in FIG. 6, the side peripheral surface of the reactor A can contribute to the reduction in the volume of the reactor device by being orthogonal to the side peripheral surfaces of the reactor B and the reactor C. The side peripheral surface may not be orthogonal to the side peripheral surfaces of the reactor B and the reactor C. That is, it is only necessary to arrange the reactors A to C so that the side circumferential surface of the reactor A is not parallel to the reactor B and the side circumferential surface of the reactor C. In such an arrangement, the line extending from the side peripheral surface of the reactor A intersects the reactor B and the line extending from the side peripheral surface of the reactor C. An example of an angle at which a line extending from the side peripheral surface of the reactor A intersects with a line extending from the side peripheral surface of the reactor B and the reactor C is orthogonal. In addition, the line extending from the side peripheral surface in the reactors A to C is parallel to the line connecting the centers of the respective leg portions when the reactors A to C have a plurality of leg portions, The line which extended this line points out the line extended from a side peripheral surface.

  The fixing portion 44 for fixing the reactor is provided on the case side surface 46 and the protruding portions 42 and 43. That is, two fixing portions 44 for fixing the reactor A are provided on the case side surface 46, the fixing portions 44 for fixing the reactor B are provided on the case side surface 46 and the protruding portion 42, and the fixing portion 44 for fixing the reactor C is Provided on the case side surface 46 and the protrusion 43. The fixing portion 44 is a screw hole extending in the z-axis direction, and after the reactors A to C are arranged, the fixing portion 44 is screwed with a screw 91 from the z-axis direction.

[1-3. Action / Effect]
(1) The reactor apparatus of this embodiment is provided with three or more reactors having the core 1 and the coil 5. The reactor device includes a metal case 4 having an open upper surface that accommodates the reactors A to C. Each of the reactors A to C includes a plurality of leg portions 16 and 17 and an annular portion that connects the yoke portions. It has a core 1. A coil 5 is wound around at least one of the legs. Each of the reactors A to C is arranged in the case 4 so that the axial direction of the coil 5 is perpendicular to the case bottom plate 47, and at least a part of the side peripheral surface of the reactors A to C is opposed to the inner peripheral surface of the case 4. Reactors A to C are arranged in the direction to be performed.

  In the reactor device having the above-described configuration, the heat generated inside the reactor can be efficiently transferred from the side peripheral surface of the reactor to the case and released to the outside of the case, thereby increasing the temperature of the reactor device. Can be suppressed. Moreover, since the heat generated in each reactor is easily transferred to the case, the heat generated in each reactor is unlikely to interfere. Therefore, it is difficult for heat to stay inside the reactor device. Therefore, it is possible to efficiently dissipate heat in the reactor device.

(2) When the core 1 has a plurality of leg portions and the respective leg portions are parallel to each other, the side peripheral surface of the reactor may be one surface of the reactor including the coil and the leg portion. Heat in the reactor is generated from the coil, and is finally transmitted to the case responsible for heat dissipation, so that the reactor is radiated. That is, in order to perform efficient heat dissipation, it is important to transfer heat from the reactor to the case. For that purpose, it is effective to widen the area of the portion responsible for the heat radiation of the reactor. Therefore, when the core 1 has a plurality of leg portions such as an E-shaped core and a U-shaped core, and the respective leg portions are parallel, one surface of the reactor including the coil and the leg portion is provided as a side peripheral surface of the reactor. . Thereby, as a side peripheral surface, in the reactor, the area of the part which bears heat radiation can be enlarged. Thereby, heat can be efficiently released to the outside of the case, and the temperature rise of the reactor device can be suppressed. Further, the heat generated by the coil is easily transmitted to the core 1 having a high thermal conductivity. Transfer of heat from the core 1 to the case is also an effective means for radiating the reactor.

(Corresponding to claim 3)
As a side peripheral surface, it is good also as one surface extended in the longitudinal direction of reactor AC. As described above, it is effective to widen the area of the side peripheral surface responsible for heat dissipation for efficient heat dissipation. By making one surface extending in the longitudinal direction of reactors A to C as a side peripheral surface, it becomes possible to secure a large area of the side peripheral surface, to efficiently release heat, and to suppress the temperature rise of the reactor device. can do.

(3) Protruding portions 41 to 43 protruding from the case side surface 46 are provided between the reactors. In order to efficiently radiate the reactor, it is desirable that a metal having a high thermal conductivity be disposed near the reactor. Around the reactor, a filling molding part 6 is filled for the purpose of transferring heat from the reactor to the case 4. Generally, the thermal conductivity of the filling molded part 6 is lower than that of a case made of metal. By disposing the protrusions 41 to 43 made of the same material as the case having a high thermal conductivity in the vicinity of the reactors A to C, the heat dissipation of each reactor is increased, and the temperature rise of the reactor device can be suppressed. .

(4) The surfaces of the projecting portions 41 to 43 facing the reactors A to C have a shape along the reactor. As described above, in order to efficiently dissipate heat from the reactor, it is necessary to bring the projecting portions 41 to 43 and the reactor as close as possible. By smoothly transferring heat between the protrusions 41 to 43 and the reactor, the heat of the reactor can be efficiently transferred to the case 4. By making the shape of the surface of the projecting portions 41 to 43 facing the reactor into a shape along the reactor, the heat dissipation of each reactor is increased, and the temperature rise of the reactor device can be suppressed.

(5) Projections 41 a erected from the case bottom plate 47 are provided in regions where the reactors A to C face each other. When viewed in the AA plane, the regions where the reactors A to C face each other are regions where heat generated from each reactor easily interferes. By providing the protrusion 41a standing from the case bottom plate 47 in this region, it is possible to form a heat exhaust route that can efficiently transfer the heat generated from each coil to the case. Thereby, the heat dissipation of each reactor rises and the temperature rise of a reactor apparatus can be suppressed.

(6) The reactor is fixed to the case via the protrusions 42 and 43 or the protrusion 41a. A fixing portion for fixing the reactors A to C is provided on the projecting portions 42 and 43 or the projecting portion 41 a located between the reactors A to C. As a result, the reactors A to C can be fixed without providing a fixing wall, so that it is possible to contribute to the realization of the effective use of the space in the case and the miniaturization of the reactor device. .

(7) By making the protrusion parts 41-43 and the projection part 41a into the same material as a case with high thermal conductivity, the heat dissipation of each reactor rises and the temperature rise of a reactor apparatus can be suppressed. Further, the protruding portions 41 to 43 or the protruding portions 41 a are continuous with the case 4. Since the protrusions 41 to 43 or the protrusion 41 a are continuous with the case 4, it is not necessary to bond the protrusions 41 to 43 or the protrusion 41 a to the case 4. For example, when the protrusions 41 to 43 or the protrusions 41a are bonded to the case 4 with an adhesive, an adhesive having a lower thermal conductivity than the case 4 inhibits heat transfer. Moreover, when the joint part of the protrusion parts 41-43 or the protrusion part 41a and a case exists, the air layer of a joint inhibits heat transfer. In this way, by forming the protrusions 41 to 43 and the protrusion 41a together with the case, it is possible to realize a reactor device that suppresses an increase in the number of steps during case formation and an increase in temperature.

(8) Reactor B and reactor C are arranged so that the side surfaces of reactor B and reactor C are parallel to each other, and the side surface of reactor A is perpendicular to the side surfaces of reactor B and reactor C. A was placed. With such an arrangement, it is possible to suppress a rise in the temperature of the reactors A to C and to realize a compact reactor device.

  That is, by disposing the reactors A to C as in the present embodiment, the heat dissipation performance of the reactor device can be increased. FIG. 8 is an analysis diagram showing the internal temperature of the reactor apparatus in the comparative example in which the conventional reactor is arranged. In FIG. 8, reactors A to C are arranged in parallel as shown in FIG. In addition, the analysis was performed in the range of 1/4 of the whole reactor apparatus. FIG. 8 shows that the temperature is 193.9 ° C. in the core 1 portion and 240.8 ° C. in the coil 5 portion. On the other hand, FIG. 9 is an analysis diagram of the internal temperature of the reactor device according to the present embodiment. In FIG. 9 as well, the analysis is performed in the range of ½ of the reactor device, and the analysis result is further halved. It is. As shown in FIG. 9, it can be seen that in the black portion, the temperature is 127.7 ° C. in the core 1 portion and 146.0 ° C. in the coil 5 portion. In the reactor device of the present embodiment, the temperature is reduced by 51.4%. This is because the heat generated in the coils 5 of the reactors A to C is easily transmitted to the outer wall of the case 4 and the temperature increase of the reactors A to C is suppressed.

  Moreover, by setting it as this arrangement | positioning, compared with the case where the reactors A-C are arrange | positioned in parallel, it becomes possible to suppress the dimension of a reactor apparatus. In the case where the dimensions of the reactors A to C are 57 × 108 × 70, when the reactors A to C are arranged in parallel, the dimensions of the reactor device are 173 × 120 × 70. The dimensions of the reactor device in the form are 165 × 120 × 70. Thus, by changing the arrangement method of the reactors A to C, the dimension in the length direction can be suppressed, and the volume can be reduced by 4.6%.

(9) The core 1 of the reactor is preferably an E-shaped core. By setting it as an E-shaped core, it becomes possible to make the surface of a coil of a reactor and two legs into a side peripheral surface. For efficient heat dissipation, it is effective to widen the area of the side peripheral surface responsible for heat dissipation. By making it an E-shaped core, a surface having a large area with a coil and two legs can be used as a side peripheral surface, and the heat of each reactor can be efficiently released, and the temperature of the reactor device increases. Can be suppressed. Moreover, the temperature rise of a reactor apparatus can be suppressed by making the material of a case into aluminum or aluminum alloy with high heat conductivity and heat dissipation.

[3. Other Embodiments]
The present invention is not limited to the first and second embodiments, and includes other embodiments described below. Moreover, the present invention also includes a form in which the first embodiment and the following other embodiments are all or any combination thereof. Furthermore, various omissions, replacements, and modifications can be made to these embodiments without departing from the scope of the invention, and modifications thereof are also included in the present invention.

(Modifications 1 and 2 of the embodiment)
(1) In this embodiment, the reactor B and the reactor C are arranged so that the reactor B and the side circumferential surface of the reactor C are parallel, and the side circumferential surface of the reactor A is the side circumferential surface of the reactor B and the reactor C. Although the reactor A is arrange | positioned so that it may orthogonally cross, arrangement | positioning of each reactor is not restricted to this. For example, as shown in FIGS. 10 (a) and 10 (b), as long as at least one of the side peripheral surfaces of the reactors A to C is arranged in a direction facing the inner peripheral surface of the case, the arrangement is arbitrary. be able to.

  Fig.10 (a) is a figure which shows the modification 1 of embodiment. 10A, the shape of the case is the same as that of the present embodiment, but the direction of the reactor A with respect to the reactors B and C is different. In the present embodiment, the reactor A is arranged such that the side circumferential surface of the reactor A is orthogonal to the side circumferential surfaces of the reactors B and C with respect to the reactors B and C arranged such that the side circumferential surfaces are parallel. However, the direction of reactor A relative to reactors B and C is not limited to this. The line extending from the side peripheral surface of the reactor A may intersect the line extending from the side peripheral surface of the reactors B and C at a substantially right angle without being strictly orthogonal. Furthermore, if the reactor A is arranged at an angle at which the side peripheral surface of the reactor A intersects the side peripheral surfaces of the reactors B and C as shown in FIG. 10A, the direction of the reactor A with respect to the reactors B and C is Can be arbitrary. Even when the shape of the case and the arrangement of the reactors A to C are adopted, the heat generated in the coils 5 of the reactors can be easily transferred to the outer wall of the case 4 to suppress the temperature rise of the reactors. It becomes possible.

  FIG.10 (b) is a figure which shows the modification 2 of embodiment. In FIG. 10, the cross-sectional shape of the case is a hexagon. With respect to this case, reactors A to C are all arranged at a position where the side peripheral surface faces case side surface 46. On the other hand, one surface opposite to the side peripheral surface disposed with respect to the case side surface 46 is disposed in a facing direction. Even when the shape of the case and the arrangement of the reactors A to C are adopted, the heat generated in the coils 5 of the reactors can be easily transferred to the outer wall of the case 4 to suppress the temperature rise of the reactors. It becomes possible.

(Modification 3 of embodiment)
(2) In the present embodiment, three reactors are arranged in the reactor device. However, if there are three or more reactors, the number of reactors arranged inside is not limited. For example, FIG. 11 is a cross-sectional view of a reactor device in which 4 to 5 reactors are arranged inside. FIG. 11A shows four reactors, and FIG. 11B shows five reactors. Even in such a case, since the side surface of the reactor faces the outer wall of the case or the wall protruding from the outer wall of the case, the heat generated by the coil 5 of each reactor is easily transferred to the outer wall of the case 4, It becomes possible to suppress the temperature rise of each reactor.

(Modification 4 of embodiment)
(2) In the present embodiment, the shape of the core 1 is E-shaped. However, if the core 1 has one or more legs that do not wind the coil 5 in addition to the legs that wind the coil 5, It is possible to use a reactor having a core 1 having an arbitrary shape. For example, a U-shaped core can be used. FIG. 12 is a cross-sectional view when three reactors having U-shaped cores are arranged in the reactor device. Even when the U-shaped core is used, by changing the arrangement method of the reactors A to C, the heat generated in the coils 5 of the reactors A to C can be easily transferred to the outer wall of the case 4, and the reactors A to C It is possible to suppress an increase in temperature.

  In 1st Embodiment, although the dimension of each reactor was made the same, it is not limited to this. For example, the reactor B and the reactor C may have the same dimensions, and the dimensions of the reactor A may be different dimensions. In addition, although the side circumferential surface of the reactor A and the side circumferential surfaces of the reactor B and the reactor C are orthogonal, they are not limited to strict orthogonality.

DESCRIPTION OF SYMBOLS 1 ... Core 1A ... Upper core 1B ... Lower core 2 ... Resin member 2B ... Lower cover 2A ... Upper cover 4 ... Case 5 ... Coil 6 ... Filling molding part 15 ... Middle leg 16 ... Outer leg 17 ... Outer leg 18 ... Yoke 21 ... fixing part 21a ... screw insertion hole 22 ... terminal fixing part 41a ... projection part 41 ... projection part 42 ... projection part 43 ... projection part 44 ... fixing part 45 ... opening 46 ... case side face 47 ... case bottom plate 52a ... connection terminal 53 ... Fixing screw 91 ... Screw

Claims (14)

A reactor device including three or more reactors having a core and a coil,
The reactor device is
A metal case having an open top surface for accommodating the reactor;
With
Each reactor is
Having an annular core comprising a plurality of legs and a yoke connecting the same;
A coil is wound around at least one of the legs,
Each reactor is
Arranged in the case such that the axial direction of the coil is perpendicular to the bottom plate of the case,
A reactor device, wherein a reactor is arranged in a direction in which at least a part of a side peripheral surface of the reactor faces an inner peripheral surface of a case. Each of the plurality of legs is provided in parallel,
The reactor device according to claim 1, wherein a side peripheral surface of the reactor is one surface of the reactor including the coil and the leg portion.   The reactor device according to claim 1, wherein a side peripheral surface of the coil is one surface of a reactor extending in a longitudinal direction of the reactor.   The reactor device according to any one of claims 1 to 3, wherein a protrusion projecting from a side surface of the case is provided between the reactor and the reactor.   The reactor device according to claim 4, wherein a surface of the protruding portion that faces the reactor has a shape along the side peripheral surface.   The reactor device according to claim 4, wherein the projecting portion is continuous with the case and is made of the same material.   The reactor device according to any one of claims 1 to 6, wherein a projecting portion standing from a bottom plate of the case is provided in a region where the reactors face each other.   The reactor according to claim 7, wherein the reactor is fixed to the case via the protruding portion or the protruding portion.   The reactor device according to claim 7 or 8, wherein the protrusion is continuous with the case and is made of the same material. Two reactors arranged side by side parallel to the reactor,
One reactor having side circumferential surfaces arranged at an intersecting angle with respect to the side circumferential surfaces of two reactors arranged in parallel;
The reactor device according to any one of claims 1 to 9, further comprising:   The reactor device according to claim 10, wherein the intersecting angle is a substantially right angle.   The one or more reactors according to any one of claims 1 to 9, wherein, in the three or more reactors, one side opposite to the side peripheral surface arranged with respect to the inner peripheral surface of the case is arranged in a facing direction. The reactor apparatus of 1 item | term.   The reactor device according to any one of claims 1 to 12, wherein the core is an E-shaped core. The case is made of aluminum or an aluminum alloy;
The reactor according to any one of claims 1 to 13, characterized by: