JP2008117898A - Reactor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reactor apparatus having a structure where transmission of vibration occurring from a reactor main body to outer frames fixing the reactor apparatus can be suppressed. <P>SOLUTION: In the reactor apparatus 100, the reactor main body 201 is stored in a storage recess 102 through a support member 202. Thus, the reactor main body 201 floats and does not contact a cabinet directly. Consequently, transmission of vibration occurring from the reactor main body 201 of the reactor apparatus 100 to the outer frames 500U and 500D fixing the reactor apparatus 100 can be suppressed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an improvement in the structure of a reactor device.

  The following patent documents 1 and 2 are mentioned as what discloses the reactor apparatus by which the reactor main body was supported in the housing | casing. Moreover, the cross-sectional structure is shown in FIG. 4 as an example of the reactor apparatus in background art.

  A reactor device 300 shown in FIG. 4 includes a reactor main body 401 that constitutes a core, and a housing 301 having an accommodation recess 302 that is open on one side in order to accommodate the reactor main body 401. Reactor body 401 is a laminated core in which thin iron plates are stacked, and includes curved portions 401a and 401c and linear portions 401b respectively arranged on both sides, and has an annular shape as a whole. A gap region G1 is defined at the facing portion between the end surfaces of the curved portions 401a and 401c and the end surface of the linear portion 401b. Note that a coil 405 is wound around the reactor body 401.

  The reactor body 401 is placed in the housing recess 302, and from the viewpoint of preventing the movement of the reactor body 401, the reactor body 401 is urged to one side wall of the housing recess 302 by the coil spring 410 and the upper side is fixed by the bracket 310. ing. The bracket 310 is fixed to the housing 301 with bolts 320. The reactor main body 401 is resin-sealed with a mold resin 420 in the housing recess 302.

  In the reactor device 300 having the above structure, the upper side and the lower side are usually fixed to the external frames 500U and 500D. The outer frame 500U located at the upper part is fixed by the upper bracket 330 using bolts 320. The lower external frame 500D is fixed by a lower bracket 340 using bolts 320.

  However, in reactor device 300 having the above-described configuration, vibrations generated from reactor device 300 may propagate to outer frames 500U and 500D through upper and lower brackets 330 and 340.

  Specifically, in the reactor main body 401 of the reactor device 300, vibrations centered on the gap region G1 are generated due to current fluctuations caused by switching elements in the boost converter (voltage converter). Here, in FIG. 5, the schematic block diagram of the motor drive device using the reactor apparatus 300 is shown. The motor drive device 600 includes a DC power supply B, system relays SR1 and SR2, capacitors C1 and C2, a bidirectional converter 610, a voltage sensor 620, and an inverter 630.

  The DC power source B outputs a DC voltage. When system relays SR1 and SR2 are turned on by a control device (not shown), DC voltage from DC power supply B is supplied to capacitor C1. Capacitor C1 smoothes the DC voltage supplied from DC power supply B via system relays SR1 and SR2, and supplies the smoothed DC voltage to bidirectional converter 610.

  Bidirectional converter 610 includes reactor device 300, NPN transistors 612 and 613, and diodes 614 and 615. Reactor 300 has one end connected to the power supply line of DC power supply B, and the other end connected to an intermediate point between NPN transistor 612 and NPN transistor 613, that is, between the emitter of NPN transistor 612 and the collector of NPN transistor 613. The

  NPN transistors 612 and 613 are connected in series between the power supply line and the earth line. The collector of the NPN transistor 612 is connected to the power supply line, and the emitter of the NPN transistor 613 is connected to the ground line. In addition, diodes 614 and 615 that flow current from the emitter side to the collector side are connected between the collector and the emitter of each NPN transistor 612 and 613.

  Bidirectional converter 610 has NPN transistors 612 and 613 turned on / off by a control device (not shown), boosts the DC voltage supplied from capacitor C1, and supplies the output voltage to capacitor C2. Bidirectional converter 610 steps down the DC voltage generated by AC motor M1 and converted by inverter 630 during regenerative braking of a hybrid vehicle or electric vehicle equipped with motor drive device 600, and supplies the voltage to capacitor C1. .

  Capacitor C 2 smoothes the DC voltage supplied from bidirectional converter 610 and supplies the smoothed DC voltage to inverter 630. The voltage sensor 620 detects the voltage on both sides of the capacitor C2, that is, the output voltage Vm of the bidirectional converter 610.

  When a DC voltage is supplied from capacitor C2, inverter 630 converts the DC voltage to an AC voltage based on control from a control device (not shown), and drives AC motor M1. Thus, AC motor M1 is driven so as to generate torque specified by the torque command value. Inverter 630 converts the AC voltage generated by AC motor M1 into a DC voltage based on control from the control device during regenerative braking of the hybrid vehicle or electric vehicle on which motor drive device 600 is mounted. DC voltage is supplied to bidirectional converter 610 via capacitor C2.

  In motor drive device 600, when the DC voltage output from DC power supply B is boosted and output voltage Vm is supplied to inverter 630, feedback control is performed so that output voltage Vm detected by voltage sensor 620 becomes voltage command Vdccom. Is done. This feedback control is PI control, and the PI control gain is determined so that the output voltage Vm becomes the voltage command Vdccom.

  Thus, in the conventional motor drive device, the PI control gain is determined, and the boosted output voltage Vm is controlled to be the voltage command Vdccom by feedback control using the determined PI control gain.

  Here, the vibration caused by the current fluctuation due to the ON / OFF of the NPN transistors 612 and 613 in the bidirectional converter 610 described above occurs in the gap region G1 located on both sides. Therefore, the vibrations are superimposed on both sides of the reactor main body 401, and the amplitude (vibration) on both sides of the reactor main body 401 becomes larger than the vibration (amplitude) in the gap region G1.

  The vibration generated in this way propagates to the housing 301 that is in direct contact with the reactor main body 401. Further, it is conceivable that the vibration propagated to the housing 301 propagates to the external frames 500U and 500D through the upper and lower brackets 330 and 340 as indicated by arrows A and B in FIG. There is also a concern that noise resulting from this vibration is generated.

Patent Document 1 and Patent Document 2 below disclose a structure in which a reactor main body is fixed to a housing, and the reactor main body is resin-sealed with a mold resin in the housing.
JP 2004-193322 A JP 2004-119609 A

  The problem to be solved by the present invention is that the vibration generated from the reactor body of the reactor device may be propagated to the external frame that fixes the reactor device, and noise may be generated due to the vibration.

  This invention is made in order to solve the above subjects, and the objective of this invention is suppressing the propagation of the vibration which generate | occur | produces from the reactor main body of a reactor apparatus to the external frame which fixes a reactor apparatus. An object of the present invention is to provide a reactor device having a structure capable of achieving the above.

  In a desirable form of the present invention, a reactor device including a reactor main body and a housing having an accommodation recess that is open on one side in order to accommodate the reactor main body, has the following configuration. .

  The reactor body is provided with a support member for supporting the reactor body so that the reactor body floats from the housing without coming into contact with the housing in the housing recess. It is placed in the housing recess.

  According to the reactor device, since the reactor main body is accommodated in the accommodating recess via the support member, the reactor main body floats from the casing without directly contacting the casing. Thereby, the vibration which generate | occur | produces from a reactor main body does not propagate directly to a housing | casing. As a result, the reactor device having a structure capable of suppressing the propagation of vibration generated from the reactor main body of the reactor device and suppressing the generation of noise caused by the vibration propagation on the external frame for fixing the reactor device. It is possible to provide.

  Hereinafter, as an example of a reactor device in an embodiment based on the present invention, a reactor device mounted on an automobile will be described with reference to FIGS. 1 and 2. FIG. 1 is a diagram showing a cross-sectional structure of a reactor device 100 in the present embodiment, and FIG. 2 is a perspective view showing only an appearance of a reactor main body 201 employed in the reactor device 100 in the present embodiment. In addition, this reactor apparatus 100 is also used for the boost converter (voltage converter) of the motor drive apparatus demonstrated in FIG.

(Reactor device 100)
Reactor device 100 in the present embodiment has a reactor main body 201 that constitutes a core, and a housing 101 that has an accommodation recess 102 that is open on one side in order to accommodate this reactor main body 201. The housing 101 has a deep region 102a and a shallow region 102b.

  Reactor body 201 is a laminated core in which thin silicon steel plates are stacked, and includes curved portions 201a and 201c and linear portions 201b arranged on both sides, respectively, and has an annular shape as a whole. A gap region G1 in which a ceramic material is inserted is defined at the facing portion between the end surfaces of the curved portions 201a and 201c and the end surface of the linear portion 201b. A coil 205 is wound around the reactor body 201. In addition, it is not limited to a laminated core, It is also possible to employ | adopt the wound core which consists of a form which wound the thin silicon steel plate in the shape of a roller, and cut the wound steel plate into a curve and a linear part.

  Further, as shown in FIG. 2, in the reactor main body 201 in the present embodiment, two gap regions G <b> 1 are supported by the support member 202. The support member 202 includes a holding plate 202a that holds the gap region G1, and support columns 202b that are disposed on both sides of the holding plate 202a. A bolt hole 202c is formed at the upper end of the support column 202b.

  The reactor main body 201 supported by the support member 202 is placed in the housing recess 102 of the housing 101 in that state. The lower end portion of the support member 202 is located up to the deep region 102 a of the housing recess 102, but the reactor body 201 is in a form that floats in the shallow region 102 b of the housing recess 102.

  The reactor body 201 is resin-sealed with a mold resin 220 in the housing recess 102. Further, the open portion on one surface of the housing recess 102 is closed by the plate 110. The plate 110 is fixed to the housing 101 with bolts 112. The upper end portion of the support member 202 is also fixed to the plate 110 with bolts 113 using the bolt holes 202c.

  Reactor device 100 having the above structure is fixed to outer frames 500U and 500D at the upper side and the lower side. The outer frame 500U located at the upper part is fixed by the upper bracket 330 using bolts 320. The lower external frame 500D is fixed by a lower bracket 340 using bolts 320.

(Operation and effect of the embodiment)
As mentioned above, according to the reactor apparatus 100 based on this invention, since the reactor main body 201 is accommodated in the accommodation recessed part via the supporting member 202, the said reactor main body 201 does not contact a housing | casing directly, but the said housing | casing It will be floating from. Thereby, the vibration generated from the reactor main body 201 due to the current fluctuation by the switching element in the boost converter (voltage converter) does not directly propagate to the casing 101. As a result, it is possible to suppress the propagation of vibration generated from the reactor main body 201 of the reactor device 100 to the external frames 500U and 500D that fix the reactor device 100, and to suppress the generation of noise due to the propagation of vibration. Is also possible.

  In the present embodiment, the gap region G <b> 1 is held by the support member 202. As a result, the vibrations are superimposed on both sides of the reactor main body 201, and the amplitude (vibration) on both sides of the reactor main body 201 is larger than the vibration (amplitude) in the gap region G1. Even if the vibration is transmitted to the casing 101 via, it is possible to suppress the propagation of the vibration rather than the amplitude (vibration) on both sides of the reactor main body 201 being transmitted.

  In addition, as a modification of the support form of the reactor main body 201 by the support member 202, as shown in FIG. 3, the structure adoption which supports the center area | region of the linear part 201b is also possible. This is because the vibration (amplitude) generated in the gap region G1 is considered to be the smallest by canceling out in the central region of the straight line portion 201b. As a result, even if vibration is transmitted to the housing 101 via the support member 202, propagation of vibration can be more effectively suppressed.

  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 the cross-section of the reactor apparatus in embodiment based on this invention. It is a perspective view which shows the external appearance of only the reactor main body employ | adopted as the reactor apparatus in embodiment based on this invention. It is a perspective view which shows the external appearance of only the reactor main body of the other form employ | adopted as the reactor apparatus in embodiment based on this invention. It is sectional drawing which shows the cross-section of the reactor apparatus in background art. It is a schematic block diagram of a motor drive device using a reactor device.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 Reactor apparatus, 101 Case, 102 Housing recessed part, 102a Deep layer area, 102b Shallow layer area, 110 Plate, 112, 113, 114 Bolt, 201 Reactor main body, 201a, 201c Curved part, 201b Straight part, 202 Support member, 202a Holding plate, 202b support column, 202c bolt hole, 205 coil, 220 mold resin, 320 bolt, 330 upper bracket, 340 lower bracket, 500U, 500D external frame, G1 gap region.

Claims (5)

A reactor device comprising: a reactor body; and a housing having a housing recess whose one surface is opened in order to house the reactor body,
The reactor body is provided with a support member for supporting the reactor body so that the reactor body floats from the housing without contacting the housing in the housing recess,
A reactor device for placing the support member in the receiving recess. The reactor main body includes a curved portion disposed on both sides, and a linear portion, and as a whole has an annular shape,
The reactor apparatus of Claim 1 which supports the gap area | region prescribed | regulated by the opposing part of the end surface of the said curved part and the end surface of the said linear part by the said supporting member. The reactor main body includes a curved portion disposed on both sides, and a linear portion, and as a whole has an annular shape,
The reactor apparatus of Claim 1 which supports the center area | region of the said linear part with the said supporting member.   The reactor device according to any one of claims 1 to 3, further comprising a plate for closing an open portion on one surface of the housing recess, wherein an upper end portion of the support member is fixed to the plate.   The reactor device according to any one of claims 1 to 4, wherein the reactor body is resin-sealed in the housing recess.

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