JP2014027086A - Reactor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reactor device in which even the internal space between a bobbin and a core can be filled with a filler simply and reliably, while keeping a constant clearance between a coil and the bobbin or of the internal space between a bobbin and a core.SOLUTION: A reactor device 1 includes a pair of coils 50a, 50b juxtaposed and interconnected, an annular core having a pair of center cores 72, 72 arranged in the pair of coils correspondingly, and a pair of side cores 74, 74 connecting the ends of the pair of center cores correspondingly, and bobbin cases 100, 200 having center core housing parts 104, 204 for housing the pair of center cores, and holding the pair of coils and the annular core. The bobbin case includes protrusions 106, 206 protruding from the center core housing parts toward the inner periphery of the pair of coils.

Description

  The present invention relates to a reactor device, and more particularly to a reactor device in which a reactor case is filled with a filler.

  In recent years, hybrid vehicles and electric vehicles equipped with an electric motor as a driving force source have become widespread. Such hybrid vehicles and electric vehicles have high voltages, and reactor devices are used to boost the voltage of the battery.

  In such a reactor device, a pair of coils that are juxtaposed to each other and an annular core that is fitted into these coils are provided, and a reactor bobbin is used to ensure insulation between the annular core and both coils. It has been.

  Patent Document 1 relates to a reactor bobbin and a reactor. The reactor bobbin 1 includes a cylindrical part C that covers the outer periphery of the inner core part, and frame parts F1 and F2 that are interposed between the end face of the coil and the exposed core part. The structure which has these is disclosed. Specifically, the reactor bobbin 1 includes a first divided piece 11 including a first frame portion F1 disposed on one exposed core portion side, and a second frame portion F2 disposed on the other exposed core portion side. The second divided piece 12 is combined. Moreover, each division | segmentation piece 11 and 12 is provided with the engaging parts 110 and 120 which engage the division | segmentation pieces 11 and 12 combined, and both engagement parts 110 and 120 each have the division | segmentation pieces 11 and 12 combined. When a force for separating the cylindrical portion C in the axial direction is applied, the first and second engaging surfaces 111 and 122 resist the force by contacting each other.

JP 2011-198847 A

  However, according to the study of the present inventor, in the configuration disclosed in Patent Document 1, the bobbin case is provided with an engagement surface and brought into contact with each other. In such a case, when filling the filler, Since the engagement surfaces are connected to each other, there is a tendency that the filling material is less likely to be filled into the internal space between the reactor bobbin and the core.

  Further, in such a configuration, it is difficult to keep the clearance between the coil and the reactor bobbin constant. Therefore, it is considered that the space between the coil and the reactor bobbin is less likely to be filled with the filler.

  The present invention has been made through the above-described studies, and it is simple and reliable to fill the internal space between the coil and the bobbin or while maintaining the clearance of the internal space between the bobbin and the core constant. An object of the present invention is to provide a reactor device that can be filled in the reactor.

In order to achieve the above object, a first aspect of the present invention includes a pair of coils juxtaposed and connected to each other, a pair of center cores disposed corresponding to the pair of coils, and the pair of coils. An annular core having a pair of side cores correspondingly communicating the ends of the center core, and a bobbin case having a center core accommodating portion for accommodating the pair of center cores and holding the pair of coils and the annular core; The bobbin case is a reactor device including a protruding portion that protrudes from the center core housing portion toward the inner periphery of the pair of coils.

  In addition to the first aspect, the second aspect of the present invention is a reactor device in which the protruding portion extends in a rail shape in the longitudinal direction of the center core housing portion.

  According to a third aspect of the present invention, in addition to the first or second aspect, the bobbin case includes an opening that opens a part of the center core housing portion, and the protrusion includes the opening. It is a reactor apparatus which protrudes toward the said inner periphery of a pair of said coil from the said center core accommodating part so that a part may be followed.

  Moreover, the 4th aspect of this invention is a reactor apparatus in which the edge part of the insertion side of the said pair of coils in the said protrusion part is a taper shape in addition to any of this 1st to 3rd aspect. .

  Moreover, the 5th aspect of this invention is a reactor apparatus which can be divided | segmented so that the said bobbin case may divide | segment the said center core accommodating part in addition to any one of this 1st-4th aspect.

  In the reactor device according to the first aspect of the present invention, a pair of coils that are juxtaposed and connected to each other, a pair of center cores that are disposed corresponding to each other in the pair of coils, and ends of the pair of center cores correspond to each other. An annular core having a pair of side cores that communicate with each other, and a bobbin case that has a center core accommodating portion that accommodates the pair of center cores and holds the pair of coils and the annular core, the bobbin case accommodating the center core When the coil is assembled to the bobbin case, the projecting part comes into contact with the inner periphery of the coil between the coil and the bobbin case. Since clearance can be provided, the clearance of the internal space between the coil and the bobbin or between the bobbin and the core is kept constant. It can be easily and reliably filled into the interior space according fillers.

  In the reactor device according to the second aspect of the present invention, the protrusion extends continuously in a rail shape in the longitudinal direction of the center core housing portion, whereby the clearance between the coil and the bobbin case can be kept constant. Moreover, since the rail-like projecting portion also has the effect of a rib, the strength of the bobbin case can be improved.

  In the reactor device according to the third aspect of the present invention, the bobbin case includes an opening that opens a part of the center core housing portion, and the projecting portion extends from the center core housing portion to the inside of the pair of coils. By projecting toward the periphery, the filler can be easily filled from the opening to the internal space between the bobbin case and the core.

  In the reactor device according to the fourth aspect of the present invention, the end of the protruding portion on the insertion side of the pair of coils is tapered, so that when the coil is assembled to the bobbin case, a part of the coil protrudes. The coil can be easily assembled to the bobbin case without being caught on the bobbin.

  In the reactor device according to the fifth aspect of the present invention, the bobbin case can be easily assembled to the bobbin case by having an upper and lower separate structure that can be divided so as to divide the center core housing portion. .

It is a perspective view of the reactor apparatus in embodiment of this invention. FIG. 2A is a perspective view of a coil assembly in the reactor device of the present embodiment, and FIG. 2B is a reactor of the present embodiment viewed along the arrow Y direction in FIG. It is the rear view which abbreviate | omitted the side core of the coil assembly in an apparatus. Fig.3 (a) is a perspective view of the bobbin assembly in the reactor apparatus of this embodiment. FIG. 3B is an exploded partial perspective view of the bobbin assembly in the reactor device of the present embodiment shown in a state where the first bobbin case and the second bobbin case in FIG. FIG. 3C is a perspective view of the bobbin assembly showing FIG. 3A with the top and bottom reversed. 4A is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 4B is a cross-sectional view taken along the line BB in FIG.

  Hereinafter, a reactor device according to an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the figure, the x-axis, y-axis, and z-axis form a three-axis orthogonal coordinate system, the z-axis direction is the vertical direction, and the xy plane is the horizontal plane.

  FIG. 1 is a perspective view of a reactor device in the present embodiment. FIG. 2A is a perspective view of a coil assembly in the reactor device of the present embodiment, and FIG. 2B is a reactor of the present embodiment viewed along the arrow Y direction in FIG. It is the rear view which abbreviate | omitted the side core of the coil assembly in an apparatus. Fig.3 (a) is a perspective view of the bobbin assembly in the reactor apparatus of this embodiment. FIG. 3B is an exploded partial perspective view of the bobbin assembly in the reactor device of the present embodiment shown in a state where the first bobbin case and the second bobbin case in FIG. FIG.3 (c) is a perspective view of the bobbin assembly which shows Fig.3 (a) upside down. 4A is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 4B is a cross-sectional view taken along the line BB in FIG.

  As shown in FIG. 1, the reactor device 1 includes a reactor case 10 and a coil assembly 30 that is housed and fixed in the reactor case 10. The reactor case 10 that houses the coil assembly 30 is filled with the filler M to maintain the coil assembly 30 in a sealed state.

  Specifically, the reactor case 10 has a rectangular box shape with the upper end being an open end, and is typically an integrally formed product made of aluminum (including an aluminum alloy). A plurality of fixing portions 12 fixed to the fixing member. A part of the vertical wall of the reactor case 10 is notched to form a notch, and the case fitting member 14 is fitted and fixed to the notch. External terminals 20 a and 20 b that are electrically connected to the coil assembly 30 are attached to the case fitting member 14.

  2 to 4, the coil assembly 30 includes a pair of coils 50a and 50b that extend in the y-axis direction and are juxtaposed with each other in the x-axis direction, and the coils 50a and 50b. The center cores 72, 72 respectively disposed in the y-axis direction and the center cores 72, 72 disposed in the coils 50a, 50b respectively extend in the x-axis direction. Accordingly, side cores 74 and 74 arranged to be magnetically connected to each other, coils 50a and 50b, center cores 72 and 72, and a bobbin assembly 90 on which the side cores 74 and 74 can be mounted are provided. Here, the external terminals 20a and 20b are electrically connected corresponding to one ends of the coils 50a and 50b, and the other ends of the coils 50a and 50b are also electrically connected to each other. The center cores 72 and 72 and the side cores 74 and 74 are typically made of electromagnetic steel, and form an annular reactor core that can be correspondingly connected and magnetically connected.

  The bobbin assembly 90 is preferably composed of divided components from the viewpoint of improving the assemblability of the coils 50a, 50b and the like. Specifically, the bobbin assembly 90 includes a first bobbin case 100 and a second bobbin case 200, each of which is typically an integrally molded product made of resin such as PPS (polyphenylene sulfide) resin. Is preferred. Although the first bobbin case 100 and the second bobbin case 200 are separate parts, they can be assembled and freely integrated. When they are assembled, the bobbin assembly has an integral structure. 90.

  The first bobbin case 100 includes a side core housing portion 102 on the negative direction side of the y axis, and a pair of plate-like members juxtaposed in the x axis direction while extending from the side core housing portion 102 to the positive direction side of the y axis. Center core accommodating portions 104 and 104. Here, from the viewpoint of improving the filling property of filling the filling material M into the coil assembly 30, each of the center core housing portions 104 and 104 has a rectangular opening 108 with a plate-like portion opened in the vertical direction. 108 are preferably provided. And when the center core accommodating parts 104 and 104 are inserted corresponding to the inner peripheral parts of the coils 50a and 50b, the coils 50a and 50b are roughly positioned, and the filler M is placed on the inner peripheral side of the coils 50a and 50b. From the viewpoint of improving the filling property of filling the inside of the coil assembly 30 through the openings 108 and 108, the peripheral portions extending in the y-axis direction of the openings 108 and 108 are respectively formed therefrom. It is preferable that projecting portions 106 and 106 projecting upward are provided. Here, from the viewpoint of improving the strength of the plate-shaped center core housing portions 104 and 104, the protruding portions 106 and 106 are respectively arranged on the y-axis of the peripheral portions of the openings 108 and 108 extending in the y-axis direction. It is preferable to have a rail-like configuration that is linearly connected in the direction and protrudes upward. That is, rail-like projecting portions 106 and 106 projecting upward in a straight line in the y-axis direction are provided on the peripheral edge portion of one opening 108 extending in the y-axis direction so as to face each other. It is preferable. Further, from the viewpoint of improving the assemblability in which the center core housing portions 104 and 104 are inserted and assembled corresponding to the inner peripheral portions of the coils 50a and 50b, the ends of the projecting portions 106 and 106 in the direction of the y axis. It is preferable that tapered portions 106t and 106t are respectively provided at the end portions on the insertion side where the center core accommodating portions 104 and 104 are inserted corresponding to the inner peripheral portions of the coils 50a and 50b. In this case, for ease of molding of the first bobbin case 100, tapered portions 106t and 106t may be provided at both ends of the protruding portions 106 and 106 in the y-axis direction, respectively. In addition, a plurality of support portions 110 may be provided in the openings 108 and 108 in a manner such as bridging so that the center cores 72 and 72 can be securely held while increasing the strength of the center core housing portions 104 and 104, respectively. .

  Here, as can be understood with reference to FIG. 2B, the coils 50a and 50b are wound around the bobbin assembly 90 in which the first bobbin case 100 and the second bobbin case 200 are assembled. When the coil assembly 30 is configured, when the center core housing portions 104 and 104 are inserted corresponding to the inner peripheral portions of the coils 50a and 50b, the upper ends of the projecting portions 106 and 106 are the ends of the coils 50a and 50b. By guiding the inner periphery, the spatial relationship between the upper ends of the protrusions 106 and 106 and the inner periphery of the coils 50a and 50b is in contact with each other or a minute gap is defined. Is set to That is, a gap is always ensured between the upper surfaces of the center core housing portions 104 and 104 and the inner peripheral portions of the coils 50a and 50b. Therefore, when filling the reactor case 10 in which the coil assembly 30 is accommodated with the filler M, the fluid filler M in the middle of filling the upper surfaces of the center core accommodating portions 104 and 104 and the coils 50a and 50b. It is possible to surely enter the inside of the coil assembly 30 through the openings 108 and 108 from the gap maintained between the peripheral portions.

The second bobbin case 200 includes a side core housing portion 202 on the positive direction side of the y-axis, and a pair of box-shaped pairs juxtaposed in the x-axis direction while extending from the side core housing portion 202 to the negative direction side of the y-axis. Center core housings 204 and 204 are provided. Here, from the viewpoint of improving the filling property of filling the filling material M into the coil assembly 30, the center core housing portions 204 and 204 each have a plurality of rectangular openings partitioned by a plurality of support portions 210. A portion 208 is preferably provided. From the viewpoint of roughly positioning the coils 50a and 50b when the center core accommodating portions 204 and 204 are inserted corresponding to the inner peripheral portions of the coils 50a and 50b, the bottom surfaces of the center core accommodating portions 204 and 204 are provided. The part is preferably provided with projecting parts 206 and 206 projecting downward from the bottom part. Here, from the viewpoint of improving the strength of the center core housing portions 204 and 204, it is preferable that the protrusions 206 and 206 have a rail-like configuration that linearly extends in the y-axis direction and protrudes downward. Further, from the viewpoint of improving the assemblability in which the center core housing portions 204 and 204 are inserted and assembled corresponding to the inner peripheral portions of the coils 50a and 50b, the ends of the projecting portions 206 and 206 in the y-axis direction It is preferable that tapered portions 206t and 206t are respectively provided at the end portions on the insertion side where the center core accommodating portions 204 and 204 are inserted corresponding to the inner peripheral portions of the coils 50a and 50b. In this case, for ease of molding of the second bobbin case 200, tapered portions 206t and 206t may be provided at both ends of the protruding portions 206 and 206 in the y-axis direction, respectively.

  Here, as can be understood with reference to FIG. 2B, the coils 50a and 50b are wound around the bobbin assembly 90 in which the first bobbin case 100 and the second bobbin case 200 are assembled. When the coil assembly 30 is configured, when the center core housing portions 204 and 204 are inserted corresponding to the inner peripheral portions of the coils 50a and 50b, the lower ends of the projecting portions 206 and 206 are the ends of the coils 50a and 50b. By guiding the inner periphery, the relationship between the lower ends of the protrusions 206 and 206 and the inner periphery of the coils 50a and 50b is set to a state where they abut against each other or a minute gap is defined. ing. That is, a gap is always ensured between the lower surfaces of the center core housing portions 204 and 204 and the inner peripheral portions of the coils 50a and 50b. Therefore, when filling the reactor case 10 in which the coil assembly 30 is accommodated with the filler M, the fluid filler M in the middle of filling is filled with the lower surfaces of the center core accommodating portions 204 and 204 and the coils 50a and 50b. The filler M can flow between the peripheral portions, the fluidity of the filler M is improved, and the wearability is improved, and the filler M can enter the coil assembly 30 through the plurality of openings 208. It is.

  In order to manufacture the reactor device 1 having the above configuration, the following steps may be performed. In the following manufacturing process, for convenience of explanation, separate first bobbin case 100 and second bobbin case 200 are used. Center core housing parts 104 and 104 of first bobbin case 100 have openings 108, The description will be made assuming that the center core housing portions 204 and 204 of the two-bobbin case 200 have the opening 208.

  Specifically, in such a manufacturing process, first, a first bobbin case 100 and a second bobbin case 200 that are separated from each other are prepared.

  Next, the center core housing portions 104 and 104 of the first bobbin case 100 are inserted into the inner peripheral portions of the coils 50a and 50b so as to be inserted therethrough. On the other hand, the center cores 72 and 72 are placed and housed in the center core housing portions 204 and 204 of the second bobbin case 200, respectively.

Next, in the second bobbin case 200, the first core bobbin case 204 and 204, in which the center cores 72 and 72 are placed, enter corresponding to the inner peripheral portions of the coils 50a and 50b and are inserted therethrough. The first bobbin case 100 is made to face the upper side of the second bobbin case 200 so that the center core housing parts 104, 104 of the 100 and the center core housing parts 204, 204 of the second bobbin case 200 are aligned with each other. Combined and integrated by a configuration such as fitting.

  Next, side cores 74 and 74 are placed and housed in the side core housing portion 102 of the first bobbin case 100 and the side core housing portion 202 of the second bobbin case 200, and the external terminals 20a and 20b are mounted. The case fitting member 14 is attached and fixed to the first bobbin case 100 to constitute the coil assembly 30.

  Next, the coil assembly 30 is housed and fixed in the reactor case 10 while the case fitting member 14 is fitted in the notch of the reactor case 10. At this time, one end of each of the coils 50a and 50b is electrically connected to the corresponding external terminal 20a and 20b, and the other end of each of the coils 50a and 50b is electrically connected. The other ends of the coils 50a and 50b may be electrically connected in advance.

  Next, the filling material M is filled in the reactor case 10 in which the coil assembly 30 is housed and fixed. At this time, the inner peripheral portions of the coils 50 a and 50 b are positioned at the upper ends of the protruding portions 106 and 106 provided in the center core housing portions 104 and 104 of the first bobbin case 100. That is, when filling the reactor case 10 in which the coil assembly 30 is accommodated with the filler M, the fluid filler M in the middle of filling the upper surfaces of the center core accommodating portions 104 and 104 in the first bobbin case 100. The air enters the inside of the coil assembly 30 through the openings 108 and 108 from the gap maintained between the coils 50a and 50b. At the same time, the inner peripheral portions of the coils 50a and 50b are positioned at the lower ends of the protrusions 206 and 206 provided in the center core housing portions 204 and 204 of the second bobbin case 200. In other words, when filling the reactor case 10 containing the coil assembly 30 with the filler M, the fluid filler M in the middle of filling fills the lower surfaces of the center core accommodating portions 204 and 204 and the coils 50a and 50b. The filler M can flow between the peripheral portions, the fluidity of the filler M is increased, and the wearability of the filler M is improved. In addition, the filler M penetrates into the coil assembly 30 through the plurality of openings 208.

  Then, after filling the reactor case 10 with a predetermined amount of the filler M, the reactor device 1 is completed by stopping the filling of the filler M and solidifying it. In addition, the center core accommodating parts 204 and 204 of the second bobbin case 200 may be inserted through the coils 50a and 50b first in the above steps.

  Now, with respect to the reactor device 1 obtained through the above steps, in order to confirm the filling state of the filler M, it is cut along the AA cutting line and the BB cutting line shown in FIG. Then, the filling state of the filler M was observed.

  Then, as schematically shown in FIG. 4A and FIG. 4B, the filler M is formed around the coils 50a and 50b, around the center cores 72 and 72, and between the coils 50a and 50b and the center cores 72 and 72. It was confirmed that all the surroundings were filled without any unnecessary cavities. Note that the discontinuous portion c of each of the coils 50a and 50b in FIG. 4B is generated because each of the coils 50a and 50b is wound.

  In the present invention, the shape, arrangement, number, and the like of the members are not limited to the above-described embodiments, and the constituent elements thereof are appropriately replaced with those having the same operational effects, and the gist of the invention is not deviated. Of course, it can be appropriately changed within the range.

As described above, in the present invention, it is possible to easily and surely fill the filling material into the internal space while keeping the clearance of the internal space between the coil and the bobbin or between the bobbin and the core constant. It is expected that the present invention can be widely applied to the field of reactor devices for vehicles such as hybrid vehicles and electric vehicles because of its universality.

DESCRIPTION OF SYMBOLS 1 ... Reactor apparatus 10 ... Reactor case 12 ... Fixed part 14 ... Case fitting member 20a, 20b ... External terminal 30 ... Coil assembly 50a, 50b ... Coil 72 ... Center core 74 ... Side core 90 ... Bobbin assembly 100 ... 1st bobbin Case 102 ... Side core housing portion 104 ... Center core housing portion 106 ... Projection portion 106t ... Taper portion 108 ... Opening portion 110 ... Supporting portion 200 ... Second bobbin case 202 ... Side core housing portion 204 ... Center core housing portion 206 ... Protrusion portion 206t ... Taper Part 208 ... Opening part 210 ... Support part M ... Filler c ... Discontinuous part

Claims (5)

A pair of coils juxtaposed and connected to each other;
A pair of center cores disposed corresponding to the pair of coils, and an annular core having a pair of side cores correspondingly connecting the ends of the pair of center cores;
A bobbin case having a center core housing portion for housing the pair of center cores and holding the pair of coils and the annular core;
In the reactor device comprising:
The said bobbin case is provided with the protrusion part which protrudes toward the inner periphery of a pair of said coil from the said center core accommodating part, The reactor apparatus characterized by the above-mentioned.   The reactor device according to claim 1, wherein the projecting portion extends in a rail shape in the longitudinal direction of the center core housing portion.   The bobbin case includes an opening that opens a part of the center core housing portion, and the projecting portion projects from the center core housing portion toward the inner circumference of the pair of coils along the opening. The reactor apparatus of Claim 1 or 2 characterized by the above-mentioned.   4. The reactor device according to claim 1, wherein end portions of the protruding portions on the insertion side of the pair of coils are tapered. 5.   The reactor device according to any one of claims 1 to 4, wherein the bobbin case is separable so as to divide the center core housing portion.

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