JP2010165858A - Reactor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reactor device for achieving both of heat radiation properties and reduction in vibration. <P>SOLUTION: The reactor device 10 includes a reactor body, and a box-like casing 31 for storing the reactor body. The reactor body includes cores 11, 12 formed from a magnetic material, and a coil 21 wound around the cores 11, 12. In the core 11, a recess 15 having a partially recessed surface is formed. At the bottom 36 of the casing 31, a projection 37 projecting toward the side of the coil 21 is formed. The projection 37 is inserted into the recess 15. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a reactor device, and more particularly, to a reactor device including a reactor main body and a box-shaped housing that houses the reactor main body.

  Conventionally, there has been proposed a reactor device that is housed in a metal box-shaped case and that can efficiently transfer generated heat of a reactor filled with a resin insulator such as an epoxy resin to a heat radiating outer surface (for example, Patent Document 1). In addition, a transformer structure has been proposed in which the prismatic part at the center of the core is inserted into the hollow part of the coil bobbin and the protrusions are fitted into the recesses of the core (see, for example, Patent Document 2).

  In addition, a reactor heat dissipation structure has been proposed in which the cooling space along the shape of the reactor can be easily configured and the number of members used for cooling can be reduced (see, for example, Patent Document 3). In addition, a vehicle-mounted reactor has been proposed that reduces the amount of sealing resin used to reduce the manufacturing cost, improves the heat dissipation effect and the insulation effect, and suppresses the generation of noise (see, for example, Patent Document 4). ).

JP-A-5-109542 Japanese Utility Model Publication No. 5-59825 JP 2006-41353 A JP 2008-28308 A

  When the reactor is operated by energizing the coil, Joule heat is generated from the coil, and vibration is generated due to deformation of the core. Therefore, in the conventional reactor apparatus, it is important to efficiently dissipate the generated heat to the outside and not transmit the vibration to the outside. In the above Patent Document 4, a reactor capable of suppressing the generation of noise is proposed, and in Patent Documents 1 and 3, a reactor having improved heat dissipation efficiency is proposed, but heat dissipation and vibration reduction are proposed. However, it is not always sufficient in terms of compatibility, and there is room for further improvement.

  This invention is made | formed in view of said problem, The main objective is to provide the reactor apparatus which makes heat dissipation and vibration reduction compatible.

  A reactor device according to one aspect of the present invention includes a reactor main body and a box-shaped housing that houses the reactor main body. The reactor body includes a core formed of a magnetic material and a coil wound around the core. The core is formed with a recess having a part of the surface recessed. A convex portion that protrudes toward the coil side is formed at the bottom of the housing. The convex part is inserted in the concave part.

  In the reactor device, preferably, the inside of the housing is filled with a resin material interposed between the reactor main body and the housing.

  Preferably, in the reactor device, the concave portion is formed in a region where a magnetic line of force generated by energization of the coil does not pass.

  A reactor device according to another aspect of the present invention includes a reactor main body, a box-shaped housing in which an opening is formed and accommodates the reactor main body, and a lid that closes the opening. The reactor body includes a core formed of a magnetic material and a coil wound around the core. The core is formed with a recess having a part of the surface recessed. A convex portion protruding toward the coil side is formed on the inner surface of the lid. The convex part is inserted in the concave part.

  In the reactor device, preferably, the inside of the housing is filled with a resin material interposed between the reactor main body and the lid.

Preferably, in the reactor device, the convex portion is in close contact with the wall portion of the housing.
Preferably, in the reactor device, the recess is formed in a region where a magnetic line of force generated by energization of the coil does not pass.

  According to the reactor of the present invention, heat generated in the coil can be efficiently released to the housing, and transmission of core vibration to the housing can be suppressed.

It is a figure which shows roughly an example of the structure of the drive unit containing the cooling structure of the reactor which concerns on one embodiment of this invention. It is a circuit diagram which shows the structure of the principal part of PCU. It is a disassembled perspective view of a reactor apparatus. It is a cross-sectional perspective view of a reactor device. It is sectional drawing of a reactor apparatus.

  Embodiments of the present invention will be described below with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

  In the embodiments described below, each component is not necessarily essential for the present invention unless otherwise specified. In the following embodiments, when referring to the number, amount, etc., unless otherwise specified, the above number is an example, and the scope of the present invention is not necessarily limited to the number, amount, etc.

  FIG. 1 is a diagram schematically showing an example of the structure of a drive unit including a reactor cooling structure according to an embodiment of the present invention. In the example shown in FIG. 1, the drive unit 1 is a drive unit mounted on a hybrid vehicle, and includes a motor generator 100, a housing 200, a speed reduction mechanism 300, a differential mechanism 400, a drive shaft receiving portion 500, And a terminal block 600.

  The motor generator 100 is a rotating electric machine having a function as an electric motor or a generator. The motor generator 100 is a rotary shaft 110 that is rotatably attached to the housing 200 via a bearing 120, a rotor 130 that is attached to the rotary shaft 110, and a stator. 140.

  The rotor 130 includes, for example, a rotor core configured by laminating plate-like magnetic bodies such as iron or an iron alloy, and a permanent magnet embedded in the rotor core. For example, the permanent magnets are arranged at substantially equal intervals in the vicinity of the outer periphery of the rotor core. In addition, you may comprise a rotor core with a powder magnetic core.

  The stator 140 includes a ring-shaped stator core 141, a stator coil 142 wound around the stator core 141, and a bus bar 143 connected to the stator coil 142. The bus bar 143 is connected to a PCU (Power Control Unit) 700 through a terminal block 600 provided in the housing 200 and a power supply cable 700A. PCU 700 is connected to battery 800 via power supply cable 800A. Thereby, battery 800 and stator coil 142 are electrically connected.

  The stator core 141 is configured by, for example, laminating plate-like magnetic bodies such as iron or iron alloy. A plurality of teeth portions (not shown) and slot portions (not shown) as recesses formed between the teeth portions are formed on the inner peripheral surface of the stator core 141. The slot portion is provided so as to open to the inner peripheral side of the stator core 141. In addition, you may comprise the stator core 141 by a dust core.

  Stator coil 142 including three winding phases, U-phase, V-phase, and W-phase, is wound around the tooth portion so as to fit into the slot portion. The U phase, V phase, and W phase of the stator coil 142 are wound so as to deviate from each other on the circumference. Bus bar 143 includes a U phase, a V phase, and a W phase corresponding to the U phase, V phase, and W phase of stator coil 142, respectively.

  The feeding cable 700A is a three-phase cable including a U-phase cable, a V-phase cable, and a W-phase cable. U-phase, V-phase, and W-phase of bus bar 143 are connected to U-phase cable, V-phase cable, and W-phase cable in power supply cable 700A, respectively.

  The power output from the motor generator 100 is transmitted from the speed reduction mechanism 300 to the drive shaft receiving portion 500 via the differential mechanism 400. The driving force transmitted to the drive shaft receiving portion 500 is transmitted as a rotational force to a wheel (not shown) via a drive shaft (not shown), thereby causing the vehicle to travel.

  On the other hand, during regenerative braking of the hybrid vehicle, the wheels are rotated by the inertial force of the vehicle body. Motor generator 100 is driven via drive shaft receiving portion 500, differential mechanism 400 and reduction mechanism 300 by the rotational force from the wheels. At this time, the motor generator 100 operates as a generator. Electric power generated by motor generator 100 is stored in battery 800 via an inverter in PCU 700.

  The drive unit 1 is provided with a resolver (not shown) having a resolver rotor and a resolver stator. The resolver rotor is connected to the rotating shaft 110 of the motor generator 100. The resolver stator has a resolver stator core and a resolver stator coil wound around the core. The rotational angle of the rotor 130 of the motor generator 100 is detected by the resolver. The detected rotation angle is transmitted to the PCU 700. PCU 700 generates a drive signal for driving motor generator 100 using the detected rotation angle of rotor 130 and a torque command value from an external ECU (Electrical Control Unit), and uses the generated drive signal as a motor. Output to the generator 100.

  FIG. 2 is a circuit diagram showing a configuration of a main part of PCU 700. Referring to FIG. 2, PCU 700 includes a converter 710, an inverter 720, a control device 730, capacitors C1 and C2, power supply lines PL1 to PL3, and output lines 740U, 740V, and 740W. Converter 710 is connected between battery 800 and inverter 720, and inverter 720 is connected to motor generator 100 via output lines 740U, 740V, and 740W.

  Battery 800 connected to converter 710 is, for example, a secondary battery such as nickel metal hydride or lithium ion. Battery 800 supplies the generated DC voltage to converter 710 and is charged by the DC voltage received from converter 710.

  Converter 710 includes power transistors Q1 and Q2, diodes D1 and D2, and a reactor L. Power transistors Q1, Q2 are connected in series between power supply lines PL2, PL3, and receive a control signal from control device 730 as a base. Diodes D1 and D2 are connected between the collector and emitter of power transistors Q1 and Q2, respectively, so that current flows from the emitter side to the collector side of power transistors Q1 and Q2. Reactor L has one end connected to power supply line PL1 connected to the positive electrode of battery 800, and the other end connected to a connection point between power transistors Q1 and Q2.

  Converter 710 boosts the DC voltage received from battery 800 using reactor L, and supplies the boosted boosted voltage to power supply line PL2. Converter 710 steps down the DC voltage received from inverter 720 and charges battery 800.

  Inverter 720 includes a U-phase arm 750U, a V-phase arm 750V, and a W-phase arm 750W. Each phase arm is connected in parallel between power supply lines PL2 and PL3. U-phase arm 750U includes power transistors Q3 and Q4 connected in series, V-phase arm 750V includes power transistors Q5 and Q6 connected in series, and W-phase arm 750W includes power transistors connected in series. It consists of transistors Q7 and Q8. Diodes D3 to D8 are respectively connected between the collector and emitter of power transistors Q3 to Q8 so that current flows from the emitter side to the collector side of power transistors Q3 to Q8. The connection point of each power transistor in each phase arm is connected to the anti-neutral point side of each phase coil of motor generator 100 via output lines 740U, 740V, and 740W.

  Inverter 720 converts a DC voltage received from power supply line PL <b> 2 into an AC voltage based on a control signal from control device 730, and outputs the AC voltage to motor generator 100. Inverter 720 rectifies the AC voltage generated by motor generator 100 into a DC voltage and supplies it to power supply line PL2.

  Capacitor C1 is connected between power supply lines PL1 and PL3, and smoothes the voltage level of power supply line PL1. Capacitor C2 is connected between power supply lines PL2 and PL3, and smoothes the voltage level of power supply line PL2.

  Control device 730 calculates each phase coil voltage of motor generator 100 based on the rotation angle of the rotor of motor generator 100, the motor torque command value, each phase current value of motor generator 100, and the input voltage of inverter 720, Based on the calculation result, a PWM (Pulse Width Modulation) signal for turning on / off the power transistors Q3 to Q8 is generated and output to the inverter 720.

  Control device 730 calculates the duty ratio of power transistors Q1 and Q2 for optimizing the input voltage of inverter 720 based on the motor torque command value and the motor rotation speed described above, and power based on the calculation result. A PWM signal for turning on / off the transistors Q 1 and Q 2 is generated and output to the converter 710.

  Further, control device 730 controls switching operations of power transistors Q <b> 1 to Q <b> 8 in converter 710 and inverter 720 in order to charge battery 800 by converting AC power generated by motor generator 100 into DC power.

  In PCU 700, converter 710 boosts a DC voltage received from battery 800 based on a control signal from control device 730, and supplies the boosted voltage to power supply line PL2. Inverter 720 receives the DC voltage smoothed by capacitor C <b> 2 from power supply line PL <b> 2, converts the received DC voltage into an AC voltage, and outputs the AC voltage to motor generator 100.

  Inverter 720 converts the AC voltage generated by the regenerative operation of motor generator 100 into a DC voltage and outputs the DC voltage to power supply line PL2. Converter 710 receives the DC voltage smoothed by capacitor C2 from power supply line PL2, and steps down the received DC voltage to charge battery 800.

  Thus, PCU 700 as an electric device unit according to the present embodiment includes inverter 720 and reactor L. Reactor L is provided in the power supply path to inverter 720.

  FIG. 3 is an exploded perspective view of the reactor device 10. FIG. 4 is a cross-sectional perspective view of the reactor device 10. FIG. 5 is a cross-sectional view of the reactor device 10. With reference to FIGS. 3-5, the structure of the reactor apparatus 10 of this Embodiment is demonstrated.

  Reactor device 10 includes a reactor main body L and a casing 31 that accommodates reactor main body L. The reactor main body L includes a coil 21 that generates a magnetic flux when energized, and a core body that has a magnetic material filled inside and outside the coil 21. The coil wire constituting the coil 21 is a flat wire such as an edge width coil. The coil 21 is formed by winding a coil wire having higher rigidity than that of a conventional general coil wire having a circular cross-sectional shape and excellent space factor and heat dissipation.

  The core body is formed by combining a pair of E-type cores 11 and a plurality of I-type cores 12 arranged to face each other. As shown in FIGS. 4 and 5, a nonmagnetic plate 13 is interposed between the E-type core 11 and the I-type core 12, and a coil bobbin 18 is interposed between the plurality of I-type cores 12. A plurality of I-type cores 12 are sequentially stacked between the E-type cores 11 to form a core body. The coil 21 is wound around a core body (iron core) constituting a magnetic circuit.

  The coil bobbin 18 that insulates and holds the E-type core 11 and the I-type core 12 is disposed so as to face the through hole 25 formed in the reactor body L. A hollow cylindrical collar 53 made of a metal material having high thermal conductivity such as aluminum is inserted into the through hole 25. Inside the through hole 25, the collar 53 and the coil bobbin 18 are fixed integrally.

  The nonmagnetic plate 13 and the coil bobbin 18 are made of an insulating material. For example, the nonmagnetic plate 13 and the coil bobbin 18 are formed of a resin material typified by PPS (Polyphenylene Sulfide) or a ceramic material. As will be described later, an electromagnetic attractive force acts on the nonmagnetic plate 13 and the coil bobbin 18 in the direction of compression in the thickness direction. When the nonmagnetic plate 13 and the coil bobbin 18 are deformed by the electromagnetic attractive force, the E-type core 11 or the I-type core 12 is deformed, and the reactor main body L is vibrated. Therefore, the nonmagnetic plate 13 and the coil bobbin 18 are preferably formed of a material having high rigidity (that is, a high Young's modulus) such as a ceramic material so that deformation is not easily caused when an electromagnetic attractive force is applied.

  The E-type core 11 and the I-type core 12 included in the core body are formed of a dust core having excellent shape flexibility and magnetic isotropy. A pair of E-type cores 11 and a plurality of I-type cores 12 form a closed magnetic circuit. An E-type core 11, an I-type core 12, and a plurality of nonmagnetic plates 13 are bonded and laminated to form a central shaft. The reactor main body L is formed by the closed magnetic path and the coil 21 wound around the central shaft. The core body is disposed on both the inner side and the outer peripheral side of the coil 21.

  The side surface 11b of the E-shaped core 11 formed in a planar rectangular shape is formed so as to cover the outside of the coil 21 and constitutes a part of the closed magnetic circuit. On the other hand, only the outer edge portion is formed on the side surface 11a of the E-type core 11, and the center portion is open. When the reactor body L is viewed from the side surface 11a side, the coil 21 is not covered with the core body because the opening is formed in the side surface 11a, and the coil 21 is exposed. Two side surfaces 11 b forming the planar rectangular E-shaped core 11 cover the outer peripheral side of the coil 21, and the other two side surfaces 11 a do not cover the coil 21.

  Only the side surface 11b of the E-type core 11 covers the outer peripheral side of the coil 21, and the coil 21 is exposed from the core body on the side surface 11a side. Therefore, when the reactor main body L is disposed inside the housing 31, the distance between the coil 21 and the wall portion 39 of the housing 31 is small. If the cooler is brought into contact with the outside of the wall portion 39 adjacent to the coil 21 and the heat generated by the coil 21 and transmitted to the wall portion of the casing 31 is cooled by the cooler, the heat dissipation of the reactor device 10 is achieved. Can be improved.

  The E-type core 11 is formed with a recess 15 in which a part of the side surface 11a is recessed. As shown in FIG. 4, the recessed part 15 is formed in both of a pair of substantially parallel side surfaces 11a of the E-type core 11 in which the planar shape was formed in the substantially rectangular shape. The recess 15 is formed in both the pair of E-type cores 11. The recess 15 is formed by cutting out a part of the side surface 11a of the E-type core 11 so that a part of the coil 21 is exposed when the E-type core 11 is viewed in plan.

  A recess 15 is formed by processing a part of the E-type core 11 that does not pass magnetic flux generated during energization and does not affect the magnetic performance of the reactor device 10. That is, the magnetic flux generated by energizing the coil 21 passes through a closed magnetic path formed by the pair of E-type cores 11 and the plurality of I-type cores 12 to form an annular magnetic field line. The magnetic field lines generated by energization of the coil 21 pass through the central axis in which the E-type core 11 and the I-type core 12 are laminated in the vertical direction, and the side surface 11b where the pair of E-type cores 11 come into contact with each other outside the coil 21. Is formed in an annular shape. The magnetic field lines pass through the side surface 11b of the E-type core 11 and do not pass through the side surface 11a.

  In a portion where the magnetic lines of force do not pass through the E-type core 11, that is, in the vicinity of the central portion of the side surface 11 a, a part of the E-type core 11 is cut out to form a recess 15. Therefore, the material required for forming the E-type core 11 can be reduced without affecting the magnetic performance of the reactor device 10. Thus, the reactor apparatus 10 which can reduce the material cost of the reactor apparatus 10 and can reduce manufacturing cost is formed.

  The housing 31 is formed in a box shape, and includes a bottom portion 36 and a rectangular wall portion 39 erected from the bottom portion 36. An opening 31 a is formed in the upper part of the housing 31. The opening 31 a of the housing 31 is closed by a lid 32. The reactor body L is disposed in a space surrounded by the casing 31 and the lid 32. The housing 31 has a column 52 extending upward from the bottom 36. The reactor main body L and the housing 31 can be fastened by arranging the reactor main body L inside the housing 31 so that the support column 52 is inserted into the through hole 25.

  A convex portion 37 protruding toward the lid 32 side is formed on the bottom portion 36 of the housing 31. The convex portion 37 is formed such that a part of the bottom portion 36 facing the coil 21 protrudes toward the coil 21 side so as to reduce the distance between the coil 21 of the reactor body L and the housing 31. The convex portion 37 is formed in a shape that can be fitted into the concave portion 15 formed in the E-type core 11.

  The lid 32 is formed with a convex portion 33 that protrudes toward the bottom 36 of the housing 31. The convex portion 33 is formed so that a part of the inner surface 32a facing the coil 21 protrudes toward the coil 21 side so as to reduce the distance between the coil 21 of the reactor body L and the lid 32. The convex portion 33 is formed in a shape that can be fitted into the concave portion 15 formed in the E-type core 11. The lid 32 is also formed with two holes 34 through which the terminal portion 21a of the coil 21 can pass. Since the terminal portion 21a passes through the lid 32 and is disposed outside the housing 31, it is possible to supply power to the coil 21 through the terminal portion 21a.

  As shown in FIG. 5, in the state where the reactor main body L is assembled in the internal space of the housing 31, the convex portion 37 in which a part of the bottom portion 36 of the housing 31 protrudes is fitted into the concave portion 15, and the lid 32. A convex part 33 from which a part of the convex part 33 protrudes is also fitted in the concave part 15. Therefore, the distance between the casing 31 and the lid 32 and the coil 21 is shortened. And the area of the housing | casing 31 and the lid | cover 32 which opposes the coil 21 is expanded. Using the concave portion 15 formed in the E-type core 11, the convex portion 37 provided in the casing 31 is disposed in the vicinity of the coil 21 so as to face the lower surface of the coil 21, and the convex portion 33 provided in the lid 32. Is disposed in the vicinity of the coil 21 so as to face the upper surface of the coil 21.

  The potting resin 26 interposed between the coil 21 and the casing 31 and the lid 32 often has a relatively low thermal conductivity with respect to the casing 31 and the lid 32. By forming the convex portions 33 and 37, the relative distance between the coil 21, which is a heating element, and the casing 31 and the lid 32, which is a heat radiation destination, can be shortened. The thickness of the potting resin 26 interposed therebetween can be reduced. And the opposing area of the coil 21, the housing | casing 31, and the lid | cover 32 can be expanded. Therefore, the heat generated in the coil 21 is efficiently transmitted to the housing 31 and the lid 32, and the heat dissipation of the heat generated in the coil 21 is promoted, so that the heat dissipation of the reactor device 10 is improved and the temperature of the coil 21 is reduced. The rise can be suppressed.

  The shape of the convex portion 33 formed on the lid 32 and the shape of the wall portion 39 of the housing 31 are matched, and a gap is formed between the convex portion 33 and the inner wall surface of the wall portion 39 when the lid 32 is assembled to the housing 31. The casing 31 and the lid 32 are formed so as not to occur. The housing 31 and the lid 32 are formed so that the convex portion 33 is in close contact with the wall portion 39 of the housing 31. When the lid 32 is assembled to the housing 31, the convex portion 33 inserted into the concave portion 15 of the E-type core 11 contacts and slides on the wall portion 39 so that the convex portion 33 is fitted inside the housing 31. In addition, the casing 31 and the lid 32 are formed.

  In this way, the lid 32 can be positioned and assembled with respect to the casing 31 using the convex portion 33, so that the positioning of the lid 32 with respect to the casing 31 is facilitated and the productivity of the reactor device 10 is improved. it can. In addition, since it is not necessary to separately provide a member for positioning the lid 32, the manufacturing cost of the reactor device 10 can be reduced.

  The casing 31 and the lid 32 can be formed of a material excellent in heat dissipation represented by a metal material. For example, the casing 31 and the lid 32 can be formed by aluminum die casting. When the casing 31 and the lid 32 are formed by casting typified by die casting, if a mold having a shape corresponding to the convex portions 33 and 37 is prepared, the casing 31 having the convex portion 37 and the lid having the convex portion 33. Since 32 can be easily formed, it is possible to suppress an increase in manufacturing cost associated with forming the convex portions 33 and 37.

  4 illustrates the reactor device 10 before the lid 32 is assembled to the housing 31, while FIG. 5 illustrates the reactor device 10 after the lid 32 is assembled to the housing 31. 4 and 5, after the reactor main body L is arranged inside the housing 31, the potting resin 26 is used to electrically insulate the coil 21 from the core body and the housing 31. It is injected inside. The lid 32 is attached to the housing 31 after the potting resin 26 is injected and before it is cured.

  The potting resin 26 is filled so as to be interposed between the reactor main body L and the casing 31 and is filled so as to be interposed between the reactor main body L and the lid 32. The coil 21 is arranged so as not to directly contact the casing 31 and the lid 32 by interposing the potting resin 26. By interposing the potting resin 26, insulation between the coil 21, the casing 31, and the lid 32 is ensured.

  For the potting resin 26, for example, a silicone resin containing a filler (filler) having excellent thermal conductivity is used. By doing so, heat generated in the coil 21 is transferred to the casing 31 and the lid 32. It becomes easier to transmit, and higher heat dissipation can be expected. However, the resin material containing the filler as described above is expensive, and it is desirable to reduce the amount used as much as possible. As shown in FIG. 5, the convex portion 37 is formed on the casing 31, and the convex portion 33 is formed on the lid 32, so that the potting resin 26 of the occupied volume in the casing 31 of the convex portions 33 and 37 can be obtained. The filling amount is reduced. Therefore, the required amount of expensive potting resin 26 can be reduced, and the manufacturing cost of the reactor device 10 can be reduced.

  Next, vibrations of the E-type core 11 and the I-type core 12 that occur when the reactor main body L is energized will be described. As described with reference to FIG. 5, the non-magnetic plate 13 is filled between the E-type core 11 and the I-type core 12, and the coil bobbin 18 is filled between the plurality of I-type cores 12. Gaps are formed between the E-type core 11 and the I-type core 12 and between the plurality of I-type cores 12, so that the predetermined magnetic performance of the reactor body L can be secured.

  When the magnetic flux passes through the magnetic bodies (E-type core 11 and I-type core 12) that are separated from each other in this way, an electromagnetic attractive force is generated in an attempt to reduce the magnetic resistance of the magnetic circuit. Due to the influence of the electromagnetic attractive force acting on the magnetic gap, the E-type core 11 and the I-type core 12 are deformed, and the E-type core 11 and the I-type core 12 are in the direction in which the electromagnetic attractive force acts (that is, the E-type core). 11 and the I-type core 12 in the stacking direction (vertical direction shown in FIG. 5). When the E-type core 11 directly contacts the casing 31, the vibration generated in the E-type core 11 is transmitted to the casing 31, and a problem occurs in which the vibration is transmitted to devices arranged around the reactor body L.

  As shown in FIG. 5, a potting resin 26 is interposed between the reactor main body L disposed inside the housing 31 and the housing 31 and the lid 32, and the reactor main body L that is a vibration source and the housing. The body 31 and the lid 32 are not in direct contact with each other and are in a non-contact state. Therefore, vibration generated in the E-type core 11 and the I-type core 12 can be suppressed from being directly transmitted to the casing 31 or the lid 32, and transmission of vibration to the outside of the casing 31 can be suppressed. The deterioration of the vibration characteristics of the reactor device 10 can be avoided.

  Further, each of the convex portions 33 and 37 has a function as a reinforcing rib for improving the strength of the lid 32 and the housing 31, and the rigidity of the parts of the housing 31 and the lid 32 formed by combining thin plates is improved. Is realized. Therefore, when vibration is transmitted to the casing 31 or the lid 32 when the E-type core 11 and the I-type core 12 vibrate, the deformation of the casing 31 and the lid 32 and the generation of vibration and noise associated with the deformation are suppressed. be able to.

  Although the embodiment of the present invention has been described as above, the embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The reactor of the present invention can be applied particularly advantageously to a reactor for boosting the voltage of a drive unit mounted on a hybrid vehicle.

  DESCRIPTION OF SYMBOLS 10 Reactor apparatus, 11 E-type core, 11a, 11b Side surface, 12 I-type core, 13 Nonmagnetic board, 15 Recessed part, 18 Coil bobbin, 21 Coil, 21a Terminal part, 25 Through-hole, 26 Potting resin, 31 Case, 31a Opening, 32 Lid, 32a Inner surface, 33, 37 Convex part, 34 Hole part, 36 Bottom part, 39 Wall part, 52 Post, 53 Collar, L Reactor body.

Claims (7)

The reactor body,
A box-shaped housing for housing the reactor body,
The reactor body includes a core formed of a magnetic material, and a coil wound around the core,
The core has a recessed portion with a part of the surface recessed,
At the bottom of the housing, a convex portion protruding toward the coil side is formed,
The said convex part is the reactor apparatus inserted in the said recessed part.   The reactor apparatus of Claim 1 with which the resin material interposed between the said reactor main body and the said housing | casing is filled into the inside of the said housing | casing.   The reactor according to claim 1, wherein the concave portion is formed in a region where a magnetic line of force generated by energization of the coil does not pass. The reactor body,
An opening is formed, and a box-shaped housing for housing the reactor body;
A lid for closing the opening;
The reactor body includes a core formed of a magnetic material, and a coil wound around the core,
The core has a recessed portion with a part of the surface recessed,
On the inner surface of the lid, a convex portion protruding toward the coil side is formed,
The said convex part is the reactor apparatus inserted in the said recessed part.   The reactor apparatus of Claim 3 with which the resin material interposed between the said reactor main body and the said lid | cover is filled into the inside of the said housing | casing.   The reactor device according to claim 3, wherein the convex portion is in close contact with a wall portion of the housing.   The reactor according to any one of claims 4 to 6, wherein the recess is formed in a region where a magnetic line of force generated by energization of the coil does not pass.

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