JP2007180225A - Fixing structure of reactor and electric apparatus unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing structure of a reactor which can reduce vibrations of a product and an electric apparatus unit containing the structure. <P>SOLUTION: The fixing structure of the reactor comprises a PCU case 760, a reactor L fixed onto the PCU case 760, a resin L3 provided around the reactor L, and a leaf spring L4 for fixing the resin L3 to the PCU case 760. The reactor L has a reactor core L1 and a reactor core L2. Here, the PCU case 760 is apart from the reactor core L1, and also the leaf spring L4 is apart from the reactor core L1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a reactor fixing structure and an electric equipment unit, and more particularly, to a reactor fixing structure and an electric equipment unit capable of reducing vibration of a product.

  2. Description of the Related Art A reactor device having a reactor core and a reactor coil is conventionally known.

  For example, Japanese Unexamined Patent Application Publication No. 2004-241475 (Patent Document 1) discloses a structure of a reactor device that holds a U-shaped core against an aluminum case by a retainer via a cushion.

  Japanese Patent Laying-Open No. 2004-95570 (Patent Document 2) discloses a structure of a reactor device in which both ends of a core are pressed against a pedestal by a fixing member.

  Japanese Patent Publication No. 6-5652 (Patent Document 3) discloses a structure in which a resin mold type induction device is fixed on a support using an attachment arm.

Japanese Patent Laying-Open No. 2004-193322 (Patent Document 4) discloses a structure in which a reactor is accommodated in a case and an epoxy resin is poured between the case and the reactor.
JP 2004-241475 A JP 2004-95570 A Japanese Patent Publication No. 6-5562 JP 2004-193322 A

  During the operation of the reactor, the interval between the reactor cores divided into a plurality of parts changes or individual cores are deformed. As a result, vibration occurs and causes noise. In the structure described in Patent Document 1, since the reactor core and the aluminum case are in contact, there is room for improvement from the viewpoint of noise suppression. Similarly, in the structure described in Patent Document 2, since the core and the pedestal are in contact, there is room for improvement in terms of noise suppression.

  Further, in the structure described in Patent Document 3, the core is restrained in the deformation direction of the reactor core, so that the vibration is easily propagated and a noise problem occurs.

  In the structure described in Patent Document 4, the reactor core is connected to the case via a boss provided on the inner surface of the case. Therefore, the vibration of the reactor can not be sufficiently suppressed from propagating to the case.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a reactor fixing structure capable of reducing vibration of a product and an electric equipment unit including the structure.

  In one aspect, the reactor fixing structure according to the present invention includes a base portion, a reactor fixed on the base portion, a resin portion provided around the reactor, and an attachment portion for fixing the resin portion to the base portion. The reactor has a reactor core, the base portion and the reactor core are separated from each other, and the attachment portion and the reactor core are separated from each other.

  According to the above configuration, the base portion, the attachment portion, and the reactor core are separated from each other, so that the vibration caused by the deformation of the reactor core can be prevented from propagating to the base portion. As a result, the reactor fixing structure in which the vibration of the product is suppressed and the noise is reduced is obtained.

  In the above-described reactor fixing structure, preferably, the mounting portion is provided so that the resin portion is fixed from above the reactor core and both ends are fixed in a direction intersecting the longitudinal direction of the reactor core.

  Thereby, since the restraint in the longitudinal direction of the reactor core by the mounting portion can be reduced, it is possible to suppress the vibration caused by the deformation of the reactor core from propagating to the base portion via the mounting portion.

  In the reactor fixing structure, preferably, the base portion has a cooling function for cooling the reactor, and the fixing structure is provided so as to protrude from the reactor core toward the base portion, and has a heat transfer coefficient higher than that of the resin portion. A high heat transfer section is further provided.

  According to the said structure, the efficiency of the heat transfer between a reactor core and a base part can be improved by providing a heat transfer part between a reactor core and a base part. As a result, the cooling efficiency of the reactor can be improved.

  The reactor fixing structure according to the present invention includes, in another aspect, a base portion, a case provided on the base portion, a reactor housed in the case, and a resin portion provided around the reactor, The reactor has a reactor core, and the reactor core is provided away from the inner surface of the case by a resin portion.

  According to the above configuration, since the resin portion is interposed between the reactor core and the inner surface of the case, it is possible to suppress the vibration caused by the deformation of the reactor core from being transmitted to the base portion through the case. As a result, the reactor fixing structure in which the vibration of the product is suppressed and the noise is reduced is obtained.

  In the reactor cooling structure, the reactor core is preferably formed of a dust core.

  In the dust core, the problem of vibration is likely to occur compared to the laminated steel core. On the other hand, according to the fixing structure of the reactor, the vibration of the reactor product can be suppressed.

  The electric equipment unit according to the present invention includes an inverter and the above-described reactor fixing structure. And a reactor is provided in the electric power supply path | route to an inverter.

  ADVANTAGE OF THE INVENTION According to this invention, the fixed structure of the reactor which can reduce the vibration of a product can be obtained.

  Hereinafter, embodiments of a reactor fixing structure and an electric device unit including the structure according to the present invention will be described. Note that the same or corresponding parts are denoted by the same reference numerals, and the description thereof may not be repeated.

  FIG. 1 is a diagram schematically showing an example of a structure of a drive unit including a reactor fixing structure according to Embodiments 1 to 3 described later. 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 through 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 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 equipment unit” according to Embodiments 1 to 3 described later includes inverter 720 and reactor L. Reactor L is provided in the power supply path to inverter 720.

(Embodiment 1)
FIG. 3 is a cross-sectional view showing the reactor fixing structure according to the first embodiment. Referring to FIG. 3, the reactor fixing structure according to the present embodiment is provided around PCL case 760, reactor L having reactor L <b> 1 and reactor coil L <b> 2, and around reactor L, and is integrated with reactor L. The resin portion L3, the plate spring L4 that presses the resin portion L3 toward the PCU case 760, the bolt L5 that fixes the plate spring L4 to the PCU case 760, and projects from the reactor L1 toward the PCU case 760 And a heat transfer portion L6.

  In the present embodiment, the reactor core L1 is constituted by a dust core. The reactor core L1 includes a plurality of divided cores. Reactor coil L2 is wound around reactor core L1. The resin portion L3 includes, for example, a urethane resin or an epoxy resin. The leaf spring L4 has elasticity and functions as a pressing member that presses the resin portion L3 toward the PCU case 760. Heat transfer portion L6 includes a metal such as copper, for example. And the heat transfer rate of the heat transfer part L6 is higher than the heat transfer rate of the resin part L3. In addition, you may form the heat-transfer part L6 integrally with the reactor core L1. Moreover, you may comprise the leaf | plate spring L4 with things like a hard aluminum case.

  When actually operating the reactor L, the current flowing through the reactor coil L2 changes. As a result, the magnetic flux density is changed, and the electromagnetic attractive force acting between the plurality of reactors and the magnetostriction in each reactor are changed. As a result, the reactor core L1 expands and contracts (deforms). This expansion and contraction occurs remarkably mainly in the X-axis direction in FIG.

  4 and 5 are cross-sectional views showing a reactor fixing structure according to Comparative Examples 1-1 and 1-2, respectively. Referring to FIG. 4, the reactor fixing structure according to Comparative Example 1-1 is housed in case L7A, case L7A, reactor L1A having reactor L1A and reactor coil L2A, and reactor L is connected to case L7A. A plate spring L4A that presses toward the side surface and a heat transfer portion L6A that protrudes from the reactor core L1 toward the PCU case are configured. 4 and 5, the case L7A is provided on the PCU case. 4 and 5, the reactor core L1A expands and contracts mainly in the direction of the arrow DR1.

  In the structure shown in Comparative Example 1-1, since the reactor core L1A is pressed against the side surface of the case L7A by the leaf spring L4A, the vibration of the reactor core L1A is directly transmitted to the case L7A. Therefore, when the reactor is operated, the vibration of the reactor easily propagates to the PCU case via the case L7A and the heat transfer part L6A, and as a result, the vibration of the product increases.

  Referring to FIG. 5, in the structure shown in Comparative Example 1-2, a cushioning material L8A is provided between reactor core L1A and case L7A. Thereby, suppression of vibration transmission from the reactor core L1A to the case L7A is expected. However, also in this structure, there is a concern that the vibration is propagated to the PCU case 760 through the heat transfer part L6A, so that the same state as the structure according to Comparative Example 1-1 is obtained.

  In contrast, in the reactor fixing structure according to the present embodiment, as shown in FIG. 3, a resin portion L3 is interposed between the PCU case 760 and the reactor core L1, and the PCU case 760 and the reactor core L1 are connected. Separated. In the above structure, the leaf spring L4 and the reactor core L1 are further separated. By doing in this way, it can control that vibration of reactor core L1 is transmitted to PCU case 760.

  Furthermore, in the reactor fixing structure according to the present embodiment, as shown in FIG. 3, a heat transfer portion L6 that protrudes from the reactor core L1 toward the PCU case 760 is provided, and the resin portion L3 located below the reactor core L1. And the thickness of the resin portion L3 located under the reactor coil L2 are substantially equal. By doing so, the reactor core L1 and the PCU case 760 can be brought closer to each other, and the efficiency of heat transfer can be improved. As a result, the cooling efficiency of the reactor can be improved.

  FIG. 6 is a cross-sectional view showing a modification of the reactor fixing structure according to the present embodiment. With reference to FIG. 6, in this modification, the leaf spring L4 that fixes the resin portion L3 from above the reactor core L1 is a direction (Y-axis direction) orthogonal to the longitudinal direction (X-axis direction) of the reactor core L1. Are provided so that both ends thereof are fixed. By doing in this way, the restraint by the leaf | plate spring L4 in the X-axis direction which is the main deformation direction of the reactor core L1 can be abolished. As a result, the vibration of the reactor core L1 is further hardly transmitted to the PCU case 760. The extending direction of the leaf spring L4 is not limited to the X-axis direction and the Y-axis direction, and may be an oblique direction that intersects both the X-axis direction and the Y-axis direction.

  3 and 6, the resin portion L3 and the leaf spring L4 are in contact with each other, but a gap may be provided between the resin portion L3 and the leaf spring L4.

  7 is a diagram showing a comparison result of product vibrations between the reactor fixing structure shown in FIG. 3 and the reactor fixing structure shown in FIG. Referring to FIG. 7, according to the reactor fixing structure (FIG. 3) according to the present embodiment, product vibration is suppressed more than the reactor fixing structure (FIG. 4) according to Comparative Example 1-1. I can confirm.

  In other words, the contents described above are as follows. That is, the reactor fixing structure according to the present embodiment includes a PCU case 760 as a “base portion”, a reactor L fixed on the PCU case 760, a resin portion L3 provided around the reactor L, A plate spring L4 as an “attachment portion” for fixing the resin portion L3 to the PCU case 760 is provided. Reactor L has a reactor core L1 and a reactor coil L2. Here, the PCU case 760 and the reactor core L1 are provided so as to be separated from each other. Further, the leaf spring L4 and the reactor core L1 are provided so as to be separated from each other.

  In the above structure, the leaf spring L4 expands when the reactor core L1 expands, and the plate spring 4 contracts when the reactor core L1 contracts. Thereby, it can suppress that the vibration resulting from a deformation | transformation of the reactor core L1 is transmitted to the PCU case 760. FIG. As a result, the reactor fixing structure in which the vibration of the product is suppressed and the noise is reduced is obtained.

  The reactor fixing structure according to the present embodiment further includes a heat transfer portion L6 provided so as to protrude from the reactor core L1 toward the PCU case 760 and having a higher heat transfer coefficient than the resin portion L3. Thereby, the efficiency of the heat transfer between the reactor core L1 and the PCU case 760 can be improved. As a result, the cooling efficiency of the reactor can be improved.

(Embodiment 2)
FIG. 8 is a cross-sectional view illustrating a reactor fixing structure according to the second embodiment. FIG. 9 is a diagram showing a state where the fixing structure shown in FIG. 8 is viewed from the direction of arrow VIII. 8 and 9, the reactor fixing structure according to the present embodiment is a modification of the reactor anchor fixing structure according to the first embodiment, and includes a PCU case 760, reactor reactor L1, and reactor. A reactor L having a coil L2, a resin portion L3 provided around the reactor L, integrated with the reactor L, a plate spring L4 that presses the resin portion L3 toward the PCU case 760, and a plate spring L4 And a bolt L5 that is fixed to a protrusion L9 provided in the PCU case 760.

  FIG. 10 is a cross-sectional view illustrating a reactor fixing structure according to Comparative Example 2. Referring to FIG. 10, the reactor fixing structure according to Comparative Example 2 includes a PCU case 760, a pedestal L7B provided on PCU case 760, a reactor L having a reactor core L1B and a reactor coil L2B, and a reactor L. , And includes a resin portion L3B integrated with the reactor L, and a leaf spring L4B that presses the resin portion L3B toward the base L7B.

  In the structure shown in the comparative example 2, since the reactor core L1B is in contact with the base L7B on the PCU case 760, the vibration of the reactor core L1B is easily transmitted to the PCU case 760 via the base L7B. The vibration of the increases.

  On the other hand, in the reactor fixing structure according to the present embodiment, as shown in FIG. 8, a resin portion L3 (thickness: T) is interposed between the PCU case 760 and the reactor core L1 in the Z-axis direction. ing. By doing in this way, it can control that vibration of Z axis direction of reactor core L1 is transmitted to PCU case 760.

  FIGS. 11 to 13 are diagrams showing vibration measurement results in the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively, in the reactor fixing structure (hereinafter referred to as S1 specification) according to the present embodiment. 14 to 16 are diagrams showing vibration measurement results in the X-axis direction, the Y-axis direction, and the Z-axis direction in the reactor fixing structure (hereinafter referred to as S2 specification) according to Comparative Example 2, respectively. In addition, in FIGS. 11-16, the types 1-3 show the type of the reactor L1. Here, types 1 and 2 are reactor cores configured by dust cores, and type 3 is a reactor core configured by laminated steel plates. Type 2 is a reactor core composed of a dust core having a lower magnetostriction than type 1.

  Referring to FIGS. 11 to 16, in the X-axis direction and the Y-axis direction, both the S1 specification (this embodiment) and the S2 specification (Comparative Example 2) remain at a low level of vibration, but the Z-axis In the direction, there is a difference in vibration level between the S1 specification and the S2 specification. That is, in the S2 specification, as shown in FIG. 16, the vibration levels of the types 1 and 2 as the dust core are higher than the vibration level of the type 3, whereas in the S1 specification, FIG. As shown, the vibration levels of types 1 and 2 are relatively low compared to the S2 specification. And the vibration level of type 2 which is a low-magnetostrictive dust core core is substantially equal to the vibration level of type 3 which is a laminated steel sheet core. Thus, according to the reactor fixing structure according to the present embodiment, it can be confirmed that the vibration in the Z-axis direction is suppressed as compared with the reactor fixing structure according to Comparative Example 2.

  17 to 19 show the relationship between the thickness (T) of the resin portion L3 below the reactor core L1 and the X-direction vibration, Y-direction vibration, and Z-direction vibration in the reactor fixing structure according to the present embodiment. FIG. Referring to FIGS. 17 to 19, the levels of the X direction vibration and the Y direction vibration are substantially constant regardless of the thickness (T) of the resin portion L3. On the other hand, the level of Z-direction vibration is significantly reduced by increasing the thickness (T) of the resin portion L3. Thus, it can be confirmed that the level of Z-direction vibration is effectively suppressed by setting the thickness (T) of the resin portion L3 below the reactor core L1 to a predetermined value or more.

  As described above, also in the present embodiment, similarly to the first embodiment, a reactor fixing structure in which product vibration is suppressed and noise is reduced can be obtained.

(Embodiment 3)
FIG. 20 is a cross-sectional view illustrating a reactor fixing structure according to the third embodiment. Referring to FIG. 20, the reactor fixing structure according to the present embodiment is a modification of the reactor anchor fixing structure according to the first and second embodiments, and is provided on PCU case 760 and PCU case 760. Case L7, a reactor L housed in the case L7 and having a reactor core L1 and a reactor coil L2, and a resin portion L3 provided around the reactor L in the case L7.

  As shown in FIG. 20, in the present embodiment, a resin portion L3 is interposed between the reactor core L1 and the bottom and side surfaces of the case L7 so that the reactor core L1 and the case L7 are not in direct contact with each other. . Thereby, the vibration of the reactor core L1 is suppressed from propagating to the PCU case 760 via the case L7. As a result, a reactor fixing structure in which vibration of the product is suppressed and noise is reduced is obtained.

  In other words, the contents described above are as follows. That is, the reactor fixing structure according to the present embodiment includes a PCU case 760 as a “base portion”, a case L7 provided on the PCU case 760, a reactor L housed in the case L7, and the reactor L The resin part L3 provided in the circumference | surroundings is provided. Reactor L has a reactor core L1 and a reactor coil L2. The reactor core L1 is provided apart from the inner surface of the case L7 by the resin portion L3. That is, the resin portion L3 is interposed between the reactor core L1 and the inner surface of the case L7.

  Although the embodiments of the present invention have been described above, the embodiments 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, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which shows schematically an example of the structure of the drive unit containing the fixing structure of the reactor which concerns on Embodiment 1-3. It is a circuit diagram which shows the structure of the principal part of PCU shown by FIG. It is sectional drawing which shows the fixing structure of the reactor which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the fixing structure of the reactor which concerns on the comparative example 1-1. It is sectional drawing which shows the fixing structure of the reactor which concerns on the comparative example 1-2. It is sectional drawing which shows the modification of the fixing structure of the reactor which concerns on Embodiment 1 of this invention. It is a figure which shows the comparison result of the product vibration of the fixing structure of the reactor which concerns on Embodiment 1 of this invention, and the fixing structure of the reactor which concerns on the comparative example 1-1. It is sectional drawing which shows the fixing structure of the reactor which concerns on Embodiment 2 of this invention. It is a figure which shows the state which looked at the fixing structure shown by FIG. 8 from the direction of arrow VIII. It is sectional drawing which shows the fixing structure of the reactor which concerns on the comparative example 2. It is a figure which shows the vibration measurement result of the X-axis direction in the fixed structure of the reactor which concerns on Embodiment 2 of this invention. It is a figure which shows the vibration measurement result of the Y-axis direction in the fixed structure of the reactor which concerns on Embodiment 2 of this invention. It is a figure which shows the vibration measurement result of the Z-axis direction in the fixed structure of the reactor which concerns on Embodiment 2 of this invention. It is a figure which shows the vibration measurement result of the X-axis direction in the fixed structure of the reactor which concerns on the comparative example 2. FIG. It is a figure which shows the vibration measurement result of the Y-axis direction in the fixed structure of the reactor which concerns on the comparative example 2. FIG. It is a figure which shows the vibration measurement result of the Z-axis direction in the fixed structure of the reactor which concerns on the comparative example 2. FIG. It is a figure which shows the relationship between the core-base part distance and X direction vibration in the fixed structure of the reactor which concerns on Embodiment 2 of this invention. It is a figure which shows the relationship between the core-base part distance and Y direction vibration in the fixed structure of the reactor which concerns on Embodiment 2 of this invention. It is a figure which shows the relationship between the core-base part distance and Z direction vibration in the fixed structure of the reactor which concerns on Embodiment 2 of this invention. It is sectional drawing which shows the fixing structure of the reactor which concerns on Embodiment 3 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Drive unit, 100 Motor generator, 110 Rotating shaft, 120 Bearing, 130 Rotor, 140 Stator, 141 Stator core, 142 Stator coil, 143 Bus bar, 200 Housing, 300 Reduction mechanism, 400 Differential mechanism, 500 Drive shaft receiving part, 600 Terminal Stand, 700 PCU, 700A, 800A power supply cable, 710 converter, 720 inverter, 730 controller, 740U, 740V, 740W output line, 750U U-phase arm, 750V V-phase arm, 750W W-phase arm, 760 PCU case, 800 battery , C1, C2 capacitors, D1-D8 diodes, L reactors, L1, L1A, L1B reactor reactors, L2, L2A, L2B reactors Coil, L3, L3B resin part, L4, L4A, L4B leaf spring, L5 bolt, L6, L6A heat transfer parts, L7, L7A case, L7B base, L8A cushioning material, L9 protrusion, PL1, PL2, PL3 power line, Q1-Q8 Power transistor.

Claims (6)

A base part;
A reactor fixed on the base portion;
A resin portion provided around the reactor;
An attachment portion for fixing the resin portion to the base portion;
The reactor has a reactor door,
A reactor fixing structure in which the base portion and the reactor core are separated from each other, and the attachment portion and the reactor core are separated from each other.   The reactor fixing structure according to claim 1, wherein the attachment portion is provided so as to fix the resin portion from above the reactor core and to be fixed at both ends in a direction intersecting a longitudinal direction of the reactor core. The base portion has a cooling function for cooling the reactor,
The reactor fixing structure according to claim 1, further comprising a heat transfer portion provided so as to protrude from the reactor core toward the base portion and having a heat transfer coefficient higher than that of the resin portion. A base part;
A case provided on the base portion;
A reactor housed in the case;
A resin portion provided around the reactor,
The reactor has a reactor door,
The reactor structure is a reactor fixing structure provided by the resin portion so as to be separated from the inner surface of the case.   The reactor fixing structure according to claim 1, wherein the reactor core is formed of a dust core. An inverter;
The reactor fixing structure according to any one of claims 1 to 5,
The reactor is an electrical device unit provided in a power supply path to the inverter.

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