JP5146287B2 - Reactor - Google Patents

Description

  The present invention relates to a reactor used for boosting an input voltage, and a power conversion device incorporating the reactor.

  Conventionally, as shown in FIGS. 10 and 11, there is known a reactor 9 that is used for boosting an input voltage, and has a main body 90 formed by integrating a coil 91 and a core 92 described below, and a reactor case 93. (For example, refer to Patent Document 1).

That is, as shown in FIG. 11, the coil 91 is formed by winding a conductor wire 910 in a spiral shape and generates a magnetic flux when energized.
As shown in FIG. 10, the core 92 is arranged on the inside and outside of the coil 91 and is made of a magnetic powder mixed resin obtained by mixing magnetic powder.

Reactor case 93 has an opening portion 933 formed on one surface thereof, a bottom surface portion 931 formed on a surface opposite to opening portion 933, and a side wall erected from the edge of bottom surface portion 931 toward opening portion 933. 932.
The reactor case 93 houses the main body 90 inside itself in a state where the opening direction of the opening 933 and the winding axis direction of the coil 92 are substantially matched.

JP 2008-198981 A

However, the conventional reactor 9 has the following problems.
That is, the main body 90 has been conventionally fixed to the reactor case 93 only by the bolt 926 at the central portion thereof. When the coil 91 is energized in the reactor 9, the adjacent conductor wires 910 in the winding axis direction of the coil 91 are attracted to each other (see symbol f in FIG. 11). At this time, the magnitude of the current supplied to the coil 91 may change. In such a case, the force that the adjacent conductor wires 910 pull each other changes, and the coil 91 vibrates in the winding axis direction. Will be.

Thus, the vibration generated in the coil 91 is transmitted to the bottom surface portion 931 and the bottom surface portion 931 is bent (see arrow A in FIG. 10). Further, when the bottom surface portion 931 is bent, the side wall 932 is also bent, and thereby the side wall 932 is also vibrated (see arrow B in FIG. 10).
As a result, there has been a problem that vibration generated in the coil 91 is amplified in the reactor case 93. Moreover, the vibration generated in the reactor 9 is transmitted to a power conversion device, a vehicle, or the like that incorporates the vibration.

  The present invention has been made in view of the above-described conventional problems, and is capable of suppressing the vibration of the side wall of the reactor case and suppressing the propagation of the vibration, and a power conversion device incorporating the reactor. Is to provide.

A first invention comprises a coil formed by winding a conductor wire in a spiral and generating a magnetic flux when energized, and a core made of a magnetic powder mixed resin disposed inside and outside the coil and mixed with magnetic powder. An integrated main body,
And having an opening formed on one surface thereof, a bottom surface formed on a surface opposite to the opening, and a side wall erected from the edge of the bottom surface toward the opening. A reactor case that houses the main body inside itself in a state in which the opening direction of the opening and the winding axis direction of the coil substantially coincide with each other;
A lid that covers the opening,
The lid portion is fixed to the reactor case at a plurality of case fixing portions formed on the side wall, and one or more main body fixings formed on an end surface of the main body portion facing the opening. Fixed to the main body at the part ,
In the main body portion, the coil is positioned so as to surround the periphery of the grip portion insert-molded in the core, and the grip portion is disposed so as to extend in the winding axis direction of the coil. In the reactor, the main body fixing portion is formed in the portion (Claim 1).

The function and effect of the present invention will be described.
The lid portion is fixed to the reactor case at the plurality of case fixing portions. Therefore, it can suppress that a vibration generate | occur | produces in a side wall. That is, since the opening of the reactor case is fixed to the lid at a plurality of locations, the strength of the opening can be increased to restrain the side wall deflection. For this reason, it can suppress that the vibration which generate | occur | produced in the coil is transmitted to a side wall via a bottom face part, and also a side wall bends outward.
Thereby, since it can suppress that a vibration generate | occur | produces in a side wall, resonance and amplification of a vibration can be suppressed. As a result, it is possible to suppress vibration from propagating to the outside of the reactor.

Moreover, the cover part is being fixed to the main-body part in the 1 or 2 or more main-body fixing part formed in the end surface facing the opening part in a main-body part.
Further, in the main body portion, the coil is positioned so as to surround the periphery of the grip portion insert-molded in the core, and the grip portion is arranged to extend in the winding axis direction of the coil, The main body fixing portion is formed in the grip portion.
Therefore, the load propagated to the side wall can be absorbed by the lid by applying the load of the main body to the lid. Also by this, the deflection of the side wall can be suppressed, and consequently the vibration of the side wall can be suppressed. Furthermore, since the lid portion is also fixed to the main body fixing portion provided in the grip portion, the strength of the opening portion can be increased and the side wall deflection can be restrained.
Thus, according to this invention, while being able to suppress the vibration of the side wall of a reactor case, the reactor which can suppress propagation of a vibration can be provided.

  The second invention comprises a coil formed by winding a conductor wire in a spiral and generating a magnetic flux when energized, and a core made of a magnetic powder mixed resin arranged inside and outside the coil and mixed with magnetic powder. An integrated main body,
  And having an opening formed on one surface thereof, a bottom surface formed on a surface opposite to the opening, and a side wall erected from the edge of the bottom surface toward the opening. A reactor case that houses the main body inside itself in a state in which the opening direction of the opening and the winding axis direction of the coil substantially coincide with each other;
  A lid that covers the opening,
  The lid portion is fixed to the reactor case at a plurality of case fixing portions formed on the side wall, and one or more main body fixings formed on an end surface of the main body portion facing the opening. The lid is fixed to the main body, and the lid has a shape bulging in a direction away from the opening,
  A force in the direction opposite to the side on which the side wall is disposed is applied to the edge of the lid portion, with the contact portion between the end surface on the opening side of the main body portion and the facing surface as a base point. It is in the reactor characterized by this (Claim 2).
  In this case, a reactor that can further suppress the occurrence of vibration can be obtained. That is, a force in the direction opposite to the side on which the side wall is disposed with respect to the contact portion between the end surface on the opening side of the main body portion and the facing surface acts on the edge of the lid portion. ing. And since the cover part is being fixed to the reactor case in the edge of this cover part, the force of the same direction as the force currently acting on the cover part will act also on a side wall (example mentioned below) 2). That is, since the force in the direction orthogonal to the bending direction as described above acts on the side wall, the force that the side wall bends outward can be further suppressed.
  In addition, since the lid portion has a shape that swells away from the opening portion as described above, the opposing surface on the side facing the opening portion of the lid portion has a greater force toward the bottom surface portion side. The main body can be pressed with. Therefore, the occurrence of vibration itself in the main body can be suppressed.

According to a third invention, the reactor according to the first or second invention, and a plurality of electronic components and a plurality of cooling pipes through which a cooling medium for cooling the plurality of electronic components is circulated are alternately laminated. The power converter is characterized by comprising a stacked type cooler (claim 7).
Since the power converter of the present invention has the reactor described in the first or second invention, vibration generated in the coil hardly propagates to the power converter. Thereby, it can also suppress that a vibration propagates to the vehicle etc. provided with this power converter.

In the first and second inventions, as the resin, for example, a thermosetting resin such as an epoxy resin, a thermoplastic resin, or the like can be used.
Moreover, as said magnetic powder, ferrite powder, iron powder, silicon alloy iron powder etc. can be used, for example.
Moreover, as said conductor wire, copper, aluminum, gold | metal | money, silver etc. can be used, for example.

Incidentally, in the third invention to the first free, fixing method between the lid portion and the body portion, and a fixing method of the cap portion and the reactor casing it can be considered various ones. That is, the lid portion and the main body portion, and the lid portion and the reactor case can be fixed by bolts or the like (see Example 1 described later), for example, a convex fitting portion on the lid portion. On the other hand, it is also possible to provide concave fitting parts on the main body part or the reactor case, and to fix them together.
Further, substantially matching the opening direction and the winding axis direction includes not only perfect matching but also a slightly inclined state.

In the third aspect of the invention, the electronic component may include an inverter element, for example. In particular, the electronic component can be, for example, an inverter semiconductor module including an IGBT (power switching element) and an FWD (diode element).

  Such a semiconductor module for inverter can be used for various types such as an inverter for automobiles, a motor drive inverter for industrial equipment, and an air conditioner inverter for building air conditioning.

The electronic component may be a battery (battery) in a hybrid electric vehicle (HEV) or an electric vehicle (EV), for example.
Further, unlike the above, the electronic component may be a semiconductor that is not modularized, and may be various types such as a thyristor, a power transistor, a power FET, and an IGBT.

  Examples of the cooling medium that flows in the cooling pipe include water mixed with ethylene glycol antifreeze, natural refrigerants such as water and ammonia, fluorocarbon refrigerants such as fluorinate, chlorofluorocarbon refrigerants such as HCFC123 and HFC134a, Alcohol refrigerants such as methanol and alcohol, ketone refrigerants such as acetone, and the like can be used.

In the first or second invention, when the reactor is viewed from the winding axis direction, the plurality of case fixing portions and the one or more main body fixing portions are arranged on the same straight line in the reactor case. (Claim 3 ).
In this case, the lid can be fixed to the reactor case in a well-balanced manner, and the fixing strength of the main body, the reactor case, and the lid can be maximized. Therefore, the side wall deflection can be further suppressed.

Also, the cap portion, it is preferable that the thickness ratio is the ratio of the distance between the case fixing portion and the body fixing portion for the thickness of 1 / 30-1 / 14 (claim 4).
In this case, even if an opening hole is formed in the lid portion, it is possible to suppress a decrease in strength of the lid portion.
When the thickness ratio is less than 1/30, there is a possibility that the strength necessary for suppressing the side wall deflection cannot be secured.
Moreover, when the said thickness ratio exceeds 1/14, there exists a possibility that a cover part may plastically deform and intensity | strength may fall. As a result, there is a possibility that the strength necessary for suppressing the deflection of the side wall cannot be secured.

Further, when the reactor is viewed from the winding axis direction, an opening hole penetrating the lid portion in the thickness direction is provided between the plurality of case fixing portions and the one or more main body fixing portions. Preferably, it is not formed (Claim 5 ).
In this case, it is possible to prevent a reduction in the strength of the lid portion due to the formation of the opening hole.

Moreover, in Claim 1, 3-5, the said cover part has a shape which swelled toward the direction away from the said opening part,
A force in the direction opposite to the side on which the side wall is disposed is applied to the edge of the lid portion, with the contact portion between the end surface on the opening side of the main body portion and the facing surface as a base point. (Claim 6 ).

  In this case, a reactor that can further suppress the occurrence of vibration can be obtained. That is, a force in the direction opposite to the side on which the side wall is disposed with respect to the contact portion between the end surface on the opening side of the main body portion and the facing surface acts on the edge of the lid portion. ing. And since the cover part is being fixed to the reactor case in the edge of this cover part, the force of the same direction as the force currently acting on the cover part will act also on a side wall (example mentioned below) 2). That is, since the force in the direction orthogonal to the bending direction as described above acts on the side wall, the force that the side wall bends outward can be further suppressed.

  In addition, since the lid portion has a shape that swells away from the opening portion as described above, the opposing surface on the side facing the opening portion of the lid portion has a greater force toward the bottom surface portion side. The main body can be pressed with. Therefore, the occurrence of vibration itself in the main body can be suppressed.

Example 1
An embodiment of the reactor of the present invention and a power conversion device incorporating the reactor will be described with reference to FIGS.
The reactor 2 of this example has the following main-body part 20, the reactor case 23, and the cover part 24 as shown in FIG. 1, FIG.

  That is, as shown in FIGS. 1, 2, and 4, the main body portion 20 is arranged on a coil 21 that spirally winds a conductor wire 210 and generates a magnetic flux when energized, and on the inside and outside of the coil 21. And a core 22 made of a magnetic powder mixed resin into which magnetic powder is mixed.

Reactor case 23 has an opening 233 formed on one surface thereof, a bottom surface 231 formed on the side opposite to opening 233, and a side wall 232 erected from the edge of bottom surface 231 toward one side. The main body 20 is housed inside itself in a state in which the opening direction of the opening 233 and the winding axis direction of the coil 21 coincide with each other.
The lid 24 is provided to cover the opening 233.

As shown in FIGS. 1, 2, and 6, the lid portion 24 is fixed to the reactor case 23 at a plurality of case fixing portions 234 formed on the side wall 232 adjacent to the opening 233.
Further, the lid portion 24 is fixed to the main body portion 20 by one or more main body fixing portions 252 formed on the end surface 250 facing the opening 233 in the main body portion 20.
Specifically, in this example, the lid portion 24 is fixed by two case fixing portions 234 and one main body fixing portion 252.

Details will be described below.
The reactor 2 of this example can be disposed in a power converter 1 such as a DC-DC converter or an inverter and used for boosting the input voltage.
Specifically, the power conversion device 1 of this example is an inverter used for an automobile, for example.

First, the power converter device 1 of this example is demonstrated with FIG. 6, FIG.
In addition to the reactor 2, the power conversion device 1 includes a plurality of electronic components 12 and a plurality of cooling pipes 111 through which a cooling medium for cooling the plurality of electronic components 12 is circulated. Stacked cooler 11 that is alternately stacked, bus bar 131 that is electrically connected to connection terminal 120 of electronic component 12 to form a power line, and bus bar that is electrically connected to the pair of extraction portions 211 132 and a housing 14 that houses the reactor 2 and the stacked cooler 11 inside.

  In this example, the electronic component 12 may include an inverter element, for example. In particular, the electronic component 12 can be, for example, an inverter semiconductor module including an IGBT (power switching element) and an FWD (diode element).

  Such a semiconductor module for inverter can be used for various types such as an inverter for automobiles, a motor drive inverter for industrial equipment, and an air conditioner inverter for building air conditioning.

The electronic component 12 may be a battery (battery) in a hybrid electric vehicle (HEV) or an electric vehicle (EV), for example.
Further, unlike the above, the electronic component 12 may be a semiconductor that is not modularized. In such a case, for example, various components such as a thyristor, a power transistor, a power FET, and an IGBT can be used. .

  In this example, the cooling medium flowing in the cooling pipe 111 includes, for example, water mixed with ethylene glycol antifreeze, water, natural refrigerants such as ammonia, fluorocarbon refrigerants such as fluorinate, HCFC123, HFC134a, etc. Various refrigerants such as a fluorocarbon refrigerant, an alcohol refrigerant such as methanol and alcohol, and a ketone refrigerant such as acetone can be used.

The laminated cooler 11 cools the electronic component 12 from both main surfaces 121 thereof.
The laminated cooler 11 includes a plurality of cooling pipes 111 for sandwiching and cooling the electronic components 12 respectively.
The plurality of cooling pipes 111 are stacked and fixed by a refrigerant supply pipe 112 that supplies a cooling medium to the plurality of cooling pipes 111 and a refrigerant discharge pipe 113 that discharges the cooling medium from the plurality of cooling pipes 111.
Further, the cooling pipe 111 has an arrangement space 110 for arranging the electronic component 12.

  In this example, the electronic component 12 constitutes a part of an automotive inverter, and can be, for example, a semiconductor module incorporating an IGBT (power switching element) and an FWD (diode element).

Further, the electronic component 12 of this example is in direct contact with the cooling pipe 111. In addition to this, the electronic component 12 can be brought into contact with the cooling pipe 111 via an insulating material (ceramic plate or the like) or heat conductive grease.
The connection terminal 120 of the electronic component 12 and the bus bar 131 are in contact with each other to form a power line.

  As shown in FIG. 7, the end face 115 of the stacked cooler 11 is pressed in the stacking direction by the spring member 15, whereby the main surface 121 of the electronic component 12 and the cooling pipe 111 are in close contact with each other. It is configured as follows.

The housing 14 can have a substantially rectangular parallelepiped shape made of a light metal such as aluminum or a reinforced resin, for example.
In addition, the bus bar 132 electrically connected to the pair of extraction portions 211 of the reactor 2 is fixed to the housing 14 by, for example, bolts 26.
In addition, as shown in FIGS. 4 and 5, the reactor 2 of the present example includes a housing surrounded by the refrigerant supply pipe 112, the refrigerant discharge pipe 113, and the casing 14 (reactor case 23). It is fixed to the body 14.

In addition, the power converter device 1 of this example is not restricted to said shape and structure, It can form in various shapes and structures.
In addition, although there are parts omitted for the sake of explanation, the power converter device 1 of this example naturally also has parts that are normally provided in the inverter.

Next, the reactor 2 of this example is demonstrated with FIGS.
As shown in FIGS. 2, 6, and 7, the reactor 2 accommodates the coil 21 and the core 22 inside itself and is formed integrally with the housing 14 as well as the coil 21 and the core 22 described above. The reactor case 23 is provided.
As this reactor case 23, what consists of aluminum excellent in heat dissipation can be used, for example.

As shown in FIGS. 1 and 6, the reactor case 23 includes a substantially circular bottom surface portion 231 and a side surface portion 232 erected from the end edge toward the opening 233 side.
An opening 233 having substantially the same shape as the reactor 2 is formed on one surface of the reactor case 23.

Further, a substantially cylindrical fixed portion 235 that protrudes toward the opening 233 is formed on the bottom surface portion 231. A fixed hole 236 for inserting the fixing bolt 26 is formed inside the fixed part 235.
The reactor case 23 is not limited to the above configuration and shape, but merely shows an example. That is, the reactor case 23 can have various shapes such as one having a circular bottom surface portion 231.

Further, as shown in FIGS. 5 and 6, the reactor 2 includes a lid portion 24 made of, for example, aluminum having a substantially rectangular shape that covers the opening 233 of the reactor case 23.
As shown in FIGS. 5 to 7, the lid portion 24 is fixed to an opening hole 241 for inserting a pair of extraction portions 211 formed by causing the conductor wire 210 to jump out from the coil 21 in order to energize the coil 21. An opening hole 242 for inserting the bolt 26 for use, and an opening hole 243 for inserting a pair of handle portions 251 described later.

When the reactor 2 is viewed from the winding axis direction, the opening holes 242 corresponding to the two case fixing portions 234 and one main body fixing portion 252 are arranged on the same straight line in the reactor case 23.
Further, as shown in FIG. 5, the cover portion 24 has an opening hole 242 for inserting the bolt 26 into the case fixing portion 234 and an opening hole 242 for inserting the bolt 26 into the main body fixing portion 252 with respect to the thickness t. The thickness ratio, which is the ratio of the distance P between them, is 1/30 to 1/14.
Moreover, when the reactor 2 is viewed from the winding axis direction, an opening hole penetrating the lid portion 24 in the thickness direction is not formed between the two case fixing portions 234 and the one main body fixing portion 252. .

  Moreover, the opening hole 241 for inserting the pair of extraction portions 211 and the opening hole 243 for inserting the pair of handle portions 251 are formed on substantially the same straight line. In particular, an opening hole 241 a for inserting one extraction portion 211 a of the pair of extraction portions 211 is formed at one of the four corners of the substantially rectangular lid portion 24. Since this portion is a portion arranged in the dead space of the reactor case 23 (see symbol D in FIGS. 2, 6, and 7), the space can be effectively used by arranging the extraction portion 211 a in the dead space D. Can be used.

  In addition, as the magnetic powder mixed resin constituting the core 22, for example, magnetic powder such as ferrite powder, iron powder, silicon alloy iron powder or the like is used for thermosetting resin such as epoxy resin or resin such as thermoplastic resin. The mixed thing can be used.

As shown in FIG. 3, the conductor wire 210 constituting the coil 21 is made of, for example, flat rectangular copper.
The conductor wire 210 is spirally wound, for example, to form a substantially cylindrical coil 21.

Further, as shown in FIGS. 1, 2, 4, and 6, the coil 21 is disposed so as to surround the periphery of the grip portion 25 that is insert-molded in the core 22.
That is, the holding part 25 is arrange | positioned inside the coil 21, for example, shape | molds aluminum.
A pair of handle portions 251 that grip the main body portion 20 in a state of being embedded in the core 22 are formed on one end surface 250a of the end surfaces 250 of the grip portion 25 in the winding axis direction.

Furthermore, a main body fixing portion 252 for inserting the bolt 26 is formed at the center of one end surface 250a of the grip portion 25.
On the other hand, at the center of the other end surface 250b of the grip portion 25, a fixing portion 253 for inserting the fixed portion 235 formed on the bottom surface portion 231 is formed.
Then, the bolt 26 is inserted into the body fixing portion 252 formed on the grip portion 25 through the lid portion 24, and the bolt 26 is fitted into the fixing hole 236 of the fixing portion 235 formed on the bottom surface portion 231. Has been. Thereby, the cover part 24 is being fixed to the main-body part 20 and the reactor case 23. FIG.

  Moreover, as shown in FIG. 1, between the main-body part 20 and the reactor case 23, resin 27 which is excellent in heat dissipation, such as a silicon resin and a urethane resin, is filled, for example. Therefore, the heat of the main body 20 can be sufficiently transmitted to the reactor case 23.

Next, the manufacturing procedure of the reactor 2 will be described with reference to FIGS.
First, the coil 21 and the grip portion 25 are arranged in a container (not shown), and the container is filled with a magnetic powder mixed resin.
Next, after solidifying the magnetic powder mixed resin to form the core 22, the main body 20 is released from the container.

Next, the pair of handle portions 251 of the main body portion 20 are gripped, and the main body portion 20 is housed inside the reactor case 23 (housing 14). At this time, the fixed portion 235 is inserted through the fixing portion 253 formed in the grip portion 25.
Next, a heat radiating resin 27 is filled between the reactor case 23 and the main body 20.

Next, the lid portion 24 is arranged so as to cover the opening portion 233 while inserting the pair of extraction portions 211 and the pair of handle portions 251 into the pair of opening holes 241 and 243 formed in the lid portion 24.
Next, after the bolts 26 are inserted into the opening holes 242 of the lid part 24, the bolts 26 are inserted into the main body fixing part 252 and the case fixing part 234.
With the above procedure, the lid portion 24 can be fixed to the main body portion 20 and the reactor case 23 to cover the opening portion 233.
It is possible to prevent the side wall 232 from being bent outside the reactor case 23.

Below, the effect of this example is demonstrated.
The lid portion 24 is fixed to the reactor case 23 by two case fixing portions 234. Therefore, it is possible to suppress the occurrence of vibration in the side wall 232. That is, since the opening part 233 of the reactor case 23 is fixed to the lid part 24 at two places, the strength of the opening part 233 can be increased and the deflection of the side wall 232 can be restrained. For this reason, it is possible to suppress the vibration generated in the coil 21 from being transmitted to the side wall 232 via the bottom surface portion 231 and further to bend the side wall 232 outward.
Thereby, since it can suppress that a vibration generate | occur | produces in the side wall 232, resonance and amplification of a vibration can be suppressed. As a result, it is possible to suppress vibration from propagating to the outside of the reactor 2.

  The lid 24 is fixed to the main body 20 at one main body fixing part 252 formed on the end surface 250 a facing the opening 233 in the main body 20. Therefore, the load transmitted to the side wall 232 can be absorbed by the lid 24 while the load of the main body 20 is applied to the lid 24. Also by this, the deflection of the side wall 232 can be suppressed, and consequently the vibration of the side wall 232 can be suppressed.

  Further, when the reactor 2 is viewed from the winding axis direction, the two case fixing portions 234 and the one main body fixing portion 252 are arranged on the same straight line in the reactor case 23. For this reason, the cover part 24 can be fixed to the reactor case 23 with good balance, and the fixing strength of the main body part 20, the reactor case 23, and the cover part 24 can be maximized. Therefore, the deflection of the side wall 232 can be further suppressed.

  Further, the lid 24 has a distance P between the opening hole 242 for inserting the bolt 26 into the case fixing part 234 and the opening hole 242 for inserting the bolt 26 into the main body fixing part 252 with respect to the thickness t. Since the thickness ratio, which is the ratio, is 1/30 to 1/14, even if an opening hole is formed in the lid portion 24, a decrease in strength of the lid portion 24 can be suppressed.

  Moreover, when the reactor 2 is viewed from the winding axis direction, an opening hole penetrating the lid portion 24 in the thickness direction is not formed between the two case fixing portions 234 and the one main body fixing portion 252. Therefore, it is possible to prevent a decrease in strength of the lid portion 24 due to the formation of the opening hole.

  Since the power converter 1 of this example has the reactor 2, the vibration generated in the coil 21 hardly propagates to the power converter 1. Thereby, it can also suppress that a vibration propagates to the vehicle etc. which were equipped with this power converter device 1.

  As described above, according to this example, it is possible to provide a reactor capable of suppressing vibration of the side wall of the reactor case and suppressing propagation of vibration, and a power conversion device incorporating the reactor.

(Example 2)
As shown in FIG. 8, this example is an example of a reactor 2 that fixes a lid portion 24 having a flat plate shape before being attached in a state where the lid portion 24 is inflated in a direction away from the opening 233.
A slight gap 29 is formed between the facing surface 244 of the lid portion 24 and the end surface 250 a of the main body portion 20.

On the opening 233 side, the protruding amount from the core 22 at the end face 250 a of the gripping portion 25 is larger than the protruding amount from the core 22 at the side wall 232.
Further, the facing surface 244 on the side of the lid portion 24 facing the opening portion 233 is in contact with the end surface 250a on the opening portion 233 side of the main body portion 20, and presses the main body portion 20 toward the bottom surface portion 231 side. Yes.

Furthermore, since the lid portion 24 before mounting is flat, the edge of the lid portion 24 after mounting is based on the contact portion 28 between the end surface 250a of the grip portion 25 and the opposing surface 244 of the lid portion 24 as a base point. A force acts in the direction of warping (upper side in FIG. 8). Such a force also acts on the side wall 232 fastened through the bolt 26. Therefore, the pulling force (see reference numeral F in FIG. 8) acts on the side wall 232 toward the lid portion 24 side.
Other configurations are the same as those of the first embodiment.

  In this case, the reactor 2 which can suppress generation | occurrence | production of a vibration further can be obtained. That is, a force directed in the direction opposite to the side where the side wall 232 is disposed is applied to the end edge of the lid portion 24 with the contact portion 28 between the end surface 250a on the opening 233 side of the main body portion 20 and the facing surface 244 as a base point. doing. And since the cover part 24 is being fixed to the reactor case 23 in the edge of this cover part 24, the force of the same direction as the force currently acting on the cover part 24 will also act on the side wall 232. . That is, since the side wall 232 acts in a direction orthogonal to the above-described deflection direction, the force with which the side wall 232 tries to bend outward can be further suppressed.

Moreover, since the cover part 24 has a shape swelled in the direction away from the opening part 233 as described above, the facing surface 244 on the side facing the opening part 233 in the cover part 24 is directed toward the bottom surface part 231 side. The main body 20 can be pressed with a greater force. Therefore, the occurrence of vibration itself in the main body 20 can be suppressed.
In addition, the same effects as those of the first embodiment are obtained.

(Example 3)
In this example, as shown in FIG. 9, the relationship between the thickness ratio, which is the ratio of the distance between the case fixing portion and the main body fixing portion with respect to the thickness of the lid portion, and vibration is examined.
That is, the distance between the case fixing portion and the main body fixing portion (see symbol P in FIG. 5) is constant at 58 mm, and the vibration value is measured by variously changing the thickness of the lid portion (see symbol t in FIG. 5). did.
And the vibration ratio with respect to the vibration value in case the thickness t of a cover part is 3 mm was measured for every thickness ratio.

The measurement results are shown in FIG.
From the figure, it can be seen that when the thickness ratio is 1/30 to 1/14, the vibration ratio can be 1 or less, which can be sufficiently smaller than the others. On the other hand, when the thickness ratio is less than 1/30 or exceeds 1/14, it can be seen that the vibration ratio increases. This tendency becomes conspicuous as the thickness ratio becomes smaller than 1/30 and as the thickness ratio becomes larger than 1/14.
In addition, this tendency is considered to become the same tendency even if thickness ratio and the thickness of a cover part change variously.

  From the above, it can be seen that when the thickness ratio is 1/30 to 1/14, the occurrence of vibration can be suppressed most.

The longitudinal cross-sectional view of the reactor in Example 1. FIG. The top view of the reactor in Example 1. FIG. The perspective view of the coil in Example 1. FIG. FIG. 3 is a perspective view of a main body portion according to the first embodiment. The perspective view of the cover part in Example 1. FIG. The top view of the power converter device in Example 1. FIG. FIG. 3 is a perspective development view of the power conversion device according to the first embodiment. The longitudinal cross-sectional view of the reactor in Example 2. FIG. FIG. 6 is a diagram showing a relationship between a vibration ratio and a thickness ratio in Example 3. The longitudinal cross-sectional view of the reactor in a prior art example. Explanatory drawing which shows the state in which the adjacent conductor wires have attracted in the prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power converter 11 Stack type cooler 111 Cooling pipe 12 Electronic component 2 Reactor 20 Main body part 204 Main body fixing part 21 Coil 210 Conductor wire 22 Core 23 Reactor case 231 Bottom face part 232 Side wall 233 Opening part 234 Case fixing part 24 Cover part 250 End face

Claims (7)

A main body formed by integrating a coil formed by winding a conductor wire in a spiral and generating a magnetic flux when energized, and a core made of a magnetic powder mixed resin arranged inside and outside the coil and mixed with magnetic powder When,
And having an opening formed on one surface thereof, a bottom surface formed on a surface opposite to the opening, and a side wall erected from the edge of the bottom surface toward the opening. A reactor case that houses the main body inside itself in a state in which the opening direction of the opening and the winding axis direction of the coil substantially coincide with each other;
A lid that covers the opening,
The lid portion is fixed to the reactor case at a plurality of case fixing portions formed on the side wall, and one or more main body fixings formed on an end surface of the main body portion facing the opening. Fixed to the main body at the part ,
In the main body portion, the coil is positioned so as to surround the periphery of the grip portion insert-molded in the core, and the grip portion is disposed so as to extend in the winding axis direction of the coil. The reactor is characterized in that the main body fixing part is formed on the part .   A main body formed by integrating a coil formed by winding a conductor wire in a spiral and generating a magnetic flux when energized, and a core made of a magnetic powder mixed resin arranged inside and outside the coil and mixed with magnetic powder When,
  And having an opening formed on one surface thereof, a bottom surface formed on a surface opposite to the opening, and a side wall erected from the edge of the bottom surface toward the opening. A reactor case that houses the main body inside itself in a state in which the opening direction of the opening and the winding axis direction of the coil substantially coincide with each other;
  A lid that covers the opening,
  The lid portion is fixed to the reactor case at a plurality of case fixing portions formed on the side wall, and one or more main body fixings formed on an end surface of the main body portion facing the opening. The lid is fixed to the main body, and the lid has a shape bulging in a direction away from the opening,
  A force in the direction opposite to the side on which the side wall is disposed is applied to the edge of the lid portion, with the contact portion between the end surface on the opening side of the main body portion and the facing surface as a base point. A reactor characterized by that. In Claim 1 or 2 , when the reactor is viewed from the winding axis direction, the plurality of case fixing parts and the one or more main body fixing parts are arranged on the same straight line in the reactor case. A reactor characterized by The thickness ratio which is ratio of the distance between the said case fixing | fixed part and the said main body fixing | fixed part with respect to the thickness in the said cover part in any one of Claims 1-3 is 1/30-1/14. A reactor characterized by that. In any one of Claims 1-4 , when the said reactor is seen from the said winding-axis direction, between the said several case fixing | fixed part and the said 1 or 2 or more main body fixing | fixed part, the said cover part The reactor is characterized in that an opening hole penetrating through the substrate in the thickness direction is not formed. The lid according to any one of claims 1 to 3 , wherein the lid has a shape bulging in a direction away from the opening.
A force in the direction opposite to the side on which the side wall is disposed is applied to the edge of the lid portion, with the contact portion between the end surface on the opening side of the main body portion and the facing surface as a base point. A reactor characterized by that. A reactor according to any one of claims 1 to 6 , a plurality of electronic components, and a plurality of cooling pipes through which a cooling medium for cooling the plurality of electronic components is circulated alternately. A power conversion device comprising a stacked cooler.

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