JP2010258244A - Induction device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction device allowing efficient cooling of a coil and a core and usable in a heavy-current region. <P>SOLUTION: In a reactor 10 as the induction device which includes a core consisting of an upper core member 11 and a lower core member 12 disposed in opposition to the upper core member 11 and in which a coil part 13a of the coil 13 is contained in a space part S defined by an upper surface part 11a, a columnar part 11b, and a peripheral wall part 11c of the upper core member 11, and a lower surface part 12a, a columnar part 12b and a peripheral wall part 12c of the lower core member 12, A cooling liquid flow-in pipe 14 and a cooling liquid flow-out pipe 15 are disposed in the upper core member 11 and the lower core member 12 as coolant flow-through ports communicating with the space part S. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an induction device such as a reactor or a transformer.

In the prior art disclosed in Patent Document 1, the bottom surface portion, the magnetic core portion provided at the center of the bottom surface portion, the peripheral wall portion integrally provided around the bottom surface portion, and the position facing the bottom surface portion are provided. And a reactor including a pot core made of a magnetic body having a lid portion fixed in direct contact with an end portion of the magnetic core portion, and a winding inserted into the magnetic core portion and housed in the peripheral wall portion. ing. In this prior art, an insulating and heat radiating sheet is disposed between the winding and the bottom portion.
By the way, in a reactor, although a pot core and a coil | winding generate | occur | produce both with electricity, according to the said structure, the heat | fever generate | occur | produced from the coil | winding can be efficiently conducted to the bottom face part of a pot core via an insulation and heat dissipation sheet. Therefore, by directly cooling the pot core from the outside by forced cooling means, heat generated from the winding and the pot core can be efficiently radiated.

JP 2006-310550 A (pages 5 to 7, FIGS. 1 to 4)

  However, in the prior art having the above structure, since the winding is inside the pot core and there is a gap between the magnetic core and the winding, the heat generated in the winding is sufficiently conducted to the pot core. There is a problem that the heat radiation of the winding becomes insufficient. Therefore, the application is limited to a small current region having a thermal margin, and may not be used in a large current region. In addition, there is a problem that the size of the pot core and windings must be increased in order to mitigate the effects of heat.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an induction device that can efficiently cool a coil and a core and can be used even in a large current region.

  In order to solve the above-mentioned problem, the invention according to claim 1 includes an upper surface portion, a lower surface portion disposed to face the upper surface portion, and a column portion provided in the center of the upper surface portion or the lower surface portion, And a core made of a magnetic body having a space formed by the upper surface, the lower surface, the column, and the peripheral wall, and accommodated in the space. In the induction device including the coil, the core is formed with a refrigerant circulation port communicating with the space.

According to the first aspect of the present invention, the core is formed with the refrigerant circulation port communicating with the space portion, so that the refrigerant flows into the space portion from the refrigerant circulation port, and the refrigerant, the coil, the refrigerant, and the core The heat generated in the coil and the core can be radiated by the refrigerant by directly contacting the inner peripheral surface. And since the refrigerant | coolant which circulated through the space part should just flow out outside from a refrigerant | coolant circulation port and may radiate | emit, cooling of a coil and a core can be performed efficiently.
Therefore, it can be used not only in the small current region but also in the large current region, as compared with the prior art.

According to a second aspect of the present invention, in the guidance device according to the first aspect, the core is formed of two or more core members, and the space portion is sealed by a seal member interposed between the core members. It is characterized by that.
According to the second aspect of the present invention, since the core is formed of two or more core members, the coil is disposed in the core member and then the core members are assembled with the seal members interposed therebetween. Since it should just be fixed, while assembling is easy, sealing of a space part can be performed reliably.

Invention of Claim 3 is the induction | guidance | derivation apparatus of Claim 1, The said core is formed from two or more core members, The said space part is sealed by resin-molding the whole core, It is characterized by the above-mentioned. To do.
According to the invention described in claim 3, since the core is formed of two or more core members, after the coils are arranged in the core member and each core member is assembled and fixed, the entire core is molded. Since it suffices to insert and resin mold, the space can be reliably sealed.

According to a fourth aspect of the present invention, in the induction device according to any one of the first to third aspects, the coil is coated with an insulating coating.
According to the fourth aspect of the invention, since the coil is coated with insulation, a short circuit due to contact between the coil and the core can be prevented. Moreover, it becomes possible to use cooling water as a refrigerant.

  According to the present invention, by providing a space for accommodating the coil in the core and circulating the refrigerant in the space, the coil and the core can be efficiently cooled, and the induction device can be used even in a large current region. Can be obtained.

It is a perspective view which shows the whole structure of the reactor which concerns on embodiment of this invention. It is a disassembled perspective view which shows the whole structure of the reactor which concerns on embodiment of this invention. FIG. 2 is a vertical sectional view taken along line AA in FIG. 1. It is the BB line cross-sectional view of FIG. It is an expanded longitudinal cross-sectional view which shows the cross-sectional structure of the seal part which concerns on embodiment of this invention. (A) The structure of the end part of a core is shown, (b) The structure of a refrigerant | coolant inflow port is shown, (c) The structure of the lead part of a coil is shown. It is a longitudinal cross-sectional view of the reactor which concerns on other embodiment.

(Embodiment of the present invention)
Hereinafter, the reactor which concerns on embodiment of this invention is demonstrated based on FIGS.
As shown in FIGS. 1 to 3, a reactor 10 as an induction device includes an upper core member 11 having an E-shaped cross section, and a lower core having the same shape as the upper core member 11 and disposed opposite to the upper core member 11. A cooling fluid inflow pipe 14 and a cooling fluid as a refrigerant circulation port that communicates the space 12 with the coil 13 accommodated in the space 12 formed by the member 12, the upper core member 11 and the lower core member 12. It consists of an outflow pipe 15.

The upper core member 11 includes a top surface portion 11a formed in a disk shape, a column portion 11b (column portion) erected downward in the center of the top surface portion 11a, and a predetermined interval around the column portion 11b. And is formed of a magnetic material such as ferrite.
The lower core member 12 includes a lower surface portion 12a formed in a disk shape, a column portion 12b (column portion) erected upward at the center of the lower surface portion 12a, and a predetermined interval around the column portion 12b. And is formed of a magnetic material such as ferrite. The inner peripheral surfaces of the upper core member 11 and the lower core member 12 are rust-proofed.

  The coil 13 includes a coil portion 13a formed by winding a rectangular wire in a circular shape by edgewise winding for a predetermined number of turns, and 2 formed so as to protrude outward from both ends of the coil portion 13a. Two lead portions 13b are provided. Note that edgewise winding refers to a coil wound in a laminated form with the short side of a flat wire as the inner diameter surface. The coil 13 is obtained by coating the surface of an enameled copper wire with an insulating resin. The lead portion 13b has the tip peeled off from the coating and the conductor is exposed.

  Two semicircular cutouts 11d for inserting the coolant inflow pipe 14 and the coolant outflow pipe 15 in the end portion 11f on the opening end side of the peripheral wall portion 11c of the upper core member 11 and the lead of the coil 13 Two rectangular cutouts 11e for guiding the portion 13b to the outside are formed. The two notches 11d are provided so as to be positioned on the same straight line passing through the cylindrical portion 11b, and the two notches 11e are provided adjacent to each other.

Two semicircular cutouts 12d for inserting the coolant inflow pipe 14 and the coolant outflow pipe 15 are inserted into the end 12f on the opening end side of the peripheral wall portion 12c of the lower core member 12, and the lead of the coil 13 Two rectangular cutouts 12e for guiding the portion 13b to the outside are formed. The two notches 12d are provided so as to be positioned on the same straight line passing through the cylindrical portion 12b, and the notches 11d and 12d are opposed to each other when the upper core member 11 and the lower core member 12 are disposed to face each other. Is formed. Further, the two notches 12e are provided adjacent to each other, and the notches 11e and 12e are formed at positions facing each other when the upper core member 11 and the lower core member 12 are disposed to face each other.
The coolant inflow pipe 14 and the coolant outflow pipe 15 are formed of cylindrical pipes in which a passage through which the coolant flows is formed. In this embodiment, cooling water is used as the refrigerant.

Next, the procedure for assembling the reactor 10 will be described.
As shown in FIG. 2, first, the coil portion 13a of the coil 13 is inserted into the cylindrical portion 12b of the lower core member 12 from above, and the two lead portions 13b are fitted and arranged in the notches 12e. At this time, as shown in FIG. 5 (c), the lead portion 13b is fitted around the notch 12e after the rubber seal member 16 made of rubber is attached around the lead portion 13b.

  Next, one end of the coolant inflow pipe 14 is fitted and arranged in one of the two notches 12d, and the other end of the coolant outflow pipe 15 is similarly fitted and arranged in the other. At this time, as shown in FIG. 5B, a cylindrical seal member 17 made of rubber is fitted around the coolant inflow pipe 14 and the coolant outflow pipe 15, and then fitted into the notch 12d.

Next, the end portion 11f on the opening end side of the peripheral wall portion 11c of the upper core member 11 is disposed so as to contact the end portion 12f on the opening end side of the peripheral wall portion 12c of the lower core member 12, and two notches 11d are provided. Are fitted and arranged in the coolant inflow pipe 14 and the coolant outflow pipe 15, respectively, and the two notches 11e are arranged in the lead portions 13b. At this time, an adhesive 18 (seal member) such as FIPG (Formed in Place Gaskets) is applied to the end portion 11f of the upper core member 11 and the end portion 12f of the lower core member 12 as shown in FIG. After coating, they are placed facing each other.
Thereafter, the upper core member 11 and the lower core member 12 are fixed by a fixing means (not shown), and then heated in a heating furnace or the like, whereby the adhesive applied between the end portions 11f and 12f. 18 curing is performed.

  As a result, as shown in FIG. 5A, the end portion 11 f of the upper core member 11 and the end portion 12 f of the lower core member 12 are joined via an adhesive 18. Further, as shown in FIG. 5B, the coolant inflow pipe 14 and the coolant outflow pipe 15 are supported so as to be sandwiched between the notches 11 d and 12 d through the seal member 17. Further, as shown in FIG. 5C, the two lead portions 13b are supported so as to be sandwiched between the notches 11e and 12e via the seal member 16.

  As shown in FIGS. 3 and 4, the donut formed by the peripheral wall portion 11c, the cylindrical portion 11b and the upper surface portion 11a of the upper core member 11, and the peripheral wall portion 12c, the cylindrical portion 12b and the lower surface portion 12a of the lower core member 12. The space S has an adhesive 18 for joining the end portion 11f and the end portion 12f, a seal member 16 mounted around the lead portion 13b, and the periphery of the coolant inflow pipe 14 and the coolant outflow pipe 15. It is in a state of being sealed from the outside due to the sealing effect of the sealing member 17 attached to.

The space portion S accommodates the coil portion 13 a of the coil 13, and the space portion S is in communication with the outside via the coolant inflow pipe 14 and the coolant outflow pipe 15. A gap G is formed between the cylindrical portion 11b and the cylindrical portion 12b in order to adjust the magnetic flux density between the cylindrical portions 11b and 12b.
The other end of the coolant inflow pipe 14 is connected to a cooling water supply device via a hose (not shown), and the other end of the coolant outflow pipe 15 is connected to a cooling water discharge device via a hose (not shown). Has been. Further, the end portion of the lead portion 13b is connected to an electric circuit via a crimp terminal or the like (not shown).

Next, the operation of the reactor 10 having the above configuration will be described.
As shown in FIGS. 3 and 4, the cooling water supplied to the space S via the coolant inflow pipe 14 circulates in the space S as indicated by arrows. The cooling water is accommodated in the inner peripheral surface of the core (the inner peripheral surfaces of the peripheral wall portions 11c and 12c, the outer peripheral surfaces of the columnar portions 11b and 12b, the inner peripheral surfaces of the upper surface portion 11a and the lower surface portion 12a) and the space portion S. It is in direct contact with the coil part 13a. Thereby, the heat generated in the upper core member 11, the lower core member 12, and the coil portion 13a can be radiated by the cooling water.

As shown in FIGS. 3 and 4, the coil portion 13a accommodated in the space portion S is formed by winding a rectangular wire a plurality of times in the vertical direction, but there is a slight gap between the rectangular wires. Is in a formed state. Therefore, the cooling water supplied to the space portion S can further dissipate heat generated in the coil portion 13a by flowing through the gaps between the rectangular wires.
The cooling water flowing through the space S is discharged to the outside through the cooling liquid outflow pipe 15.
Thus, by circulating the cooling water in the space S, the heat generated in the upper core member 11, the lower core member 12, and the coil portion 13a can be efficiently radiated to the outside, and the reactor can be efficiently cooled. Can be done well.

  By the way, the end portion 11f of the upper core member 11 and the end portion 12f of the lower core member 12 are joined by an adhesive 18, and the coolant inflow pipe 14 and the coolant outflow pipe 15 are connected via a seal member 17. Since the two lead portions 13b are supported so as to be sandwiched between the notches 11e and 12e via the seal member 16, the space portion S is externally supported. The cooling water flowing through the space S is prevented from leaking to the outside.

According to the reactor 10 which concerns on this embodiment of this invention, there exist the following effects.
(1) The cooling water supplied to the space portion S through the coolant inflow pipe 14 circulates in the space portion S, and the inner peripheral surface of the core (the inner peripheral surface of the peripheral wall portions 11c and 12c, the cylindrical portion 11b, The outer peripheral surface of 12b, the inner peripheral surface of the upper surface portion 11a and the lower surface portion 12a) and the coil portion 13a accommodated in the space S. Thereby, the heat generated in the upper core member 11, the lower core member 12, and the coil portion 13a can be radiated by the cooling water.
(2) The coil portion 13a accommodated in the space portion S is formed by winding a rectangular wire a plurality of times in the vertical direction. However, a slight gap is formed between the rectangular wires. The cooling water supplied to the part S can dissipate heat generated in the coil part 13a by flowing through the gaps between the rectangular wires.
(3) By circulating the cooling water in the space S, the heat generated in the upper core member 11, the lower core member 12, and the coil portion 13a can be efficiently radiated to the outside, and the reactor can be efficiently cooled. Therefore, it can be used even in a large current region that could not be used conventionally.
(4) Cooling water is directly supplied to the space S formed by the upper surface portion 11a, the cylindrical portion 11b and the peripheral wall portion 11c of the upper core member 11, and the lower surface portion 12a, the cylindrical portion 12b and the peripheral wall portion 12c of the lower core member 12. Since the structure is compact and distributed, a housing for cooling the reactor is unnecessary, and the size of the reactor can be reduced to the minimum necessary size.
(5) Since the core is formed of two core members (upper core member 11 and lower core member 12), the coil 13 is disposed in the core member and then the seal member (seal member 16) is interposed between the core members. , 17 and the adhesive 18) are assembled and fixed, so that the assembly is simple. Further, the end 11 f of the upper core member 11 and the end 12 f of the lower core member 12 are joined by an adhesive 18, and the coolant inflow pipe 14 and the coolant outflow pipe 15 are connected via a seal member 17. Since the two lead portions 13b are supported so as to be sandwiched between the notches 11e and 12e via the seal member 16, the space portion S is surely secured. It is possible to prevent the cooling water flowing through the space S from leaking to the outside.
(6) Since the coil 13 is insulation-coated, a short circuit due to contact between the coil 13 and the upper core member 11 and the lower core member 12 can be prevented. Moreover, it becomes possible to use cooling water as a refrigerant.
(7) Since the two core members are formed of the upper core member 11 and the lower core member 12 having the same shape, the number of parts and the manufacturing cost can be reduced as compared with the case of forming from the core members having different shapes. It is.

The present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the spirit of the invention. For example, the following modifications may be made.
In the embodiment of the present invention, it has been described that the space portion S is hermetically sealed by bonding the end portions 11f and 12f of the upper core member 11 and the lower core member 12 facing each other with the adhesive 18. As shown in FIG. 3, the resin mold 21 may be made of a resin material such as a thermosetting resin around the upper core member 11 and the lower core member 12 that are arranged to face each other. Even in this case, the space S can be reliably sealed.
In the embodiment of the present invention, it has been described that the periphery of the coolant inflow pipe 14, the coolant outflow pipe 15 and the lead portion 13b is sealed by the seal members 16 and 17, but may be sealed by an O-ring, Moreover, you may seal with an adhesive agent.
In the embodiment of the present invention, it has been described that cooling water is used as the refrigerant, but insulating oil such as ATF (Automatic Transmission Fluid) may be used. In this case, the insulating coating of the coil 13 and the rust prevention treatment of the inner peripheral surfaces of the upper core member 11 and the lower core member 12 are unnecessary. Moreover, you may use gas as a refrigerant | coolant instead of a fluid.
In the embodiment of the present invention, the cooling liquid inflow pipe 14 and the cooling liquid outflow pipe 15 are provided on the peripheral wall portions 11c and 12c of the upper core member 11 and the lower core member 12, but the upper surface portion 11a and the lower surface portion 12a are provided. Each may be provided.
In the embodiment of the present invention, it has been described that the upper core member 11 and the lower core member 12 having the same shape with an E-shaped cross section are used, but one is a core member with an E-shaped cross section and the other is a flat plate with a cross section. You may comprise with an I-shaped lid member.
In the embodiment of the present invention, a rectangular wire is used as the coil 13. However, a round wire may be used as the coil, and the present invention can be applied to various other coils.
In the embodiment of the present invention, the reactor 10 has been described, but it may be applied to a transformer.

DESCRIPTION OF SYMBOLS 10 Reactor 11 Upper core member 11a Upper surface part 11b Cylindrical part 11c Peripheral wall part 12 Lower core member 12a Lower surface part 12b Cylindrical part 12c Peripheral wall part 13 Coil 13a Coil part 14 Coolant inflow pipe 15 Coolant outflow pipe 16 Seal member 17 Seal member 18 adhesive

Claims (4)

An upper surface portion, a lower surface portion opposed to the upper surface portion, a pillar portion provided at the center of the upper surface portion or the lower surface portion, and a peripheral wall portion provided around the pillar portion, An induction device comprising a core made of a magnetic body in which a space portion is formed by an upper surface portion, the lower surface portion, the column portion, and the peripheral wall portion, and a coil accommodated in the space portion,
The induction device according to claim 1, wherein a coolant circulation port communicating with the space is formed in the core.   The induction device according to claim 1, wherein the core is formed of two or more core members, and the space is sealed by a seal member interposed between the core members.   The induction device according to claim 1, wherein the core is formed of two or more core members, and the space is sealed by resin-molding the entire core.   The induction device according to claim 1, wherein the coil is insulation-coated.