WO2020213438A1 - Power conversion device for railway vehicle - Google Patents

Power conversion device for railway vehicle Download PDF

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Publication number
WO2020213438A1
WO2020213438A1 PCT/JP2020/015365 JP2020015365W WO2020213438A1 WO 2020213438 A1 WO2020213438 A1 WO 2020213438A1 JP 2020015365 W JP2020015365 W JP 2020015365W WO 2020213438 A1 WO2020213438 A1 WO 2020213438A1
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WO
WIPO (PCT)
Prior art keywords
stepped
housing
heat exchanger
power conversion
conversion device
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PCT/JP2020/015365
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French (fr)
Japanese (ja)
Inventor
直矢 橋口
昭裕 菱田
剛 岡安
秀一 寺門
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株式会社日立製作所
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Priority to JP2021514880A priority Critical patent/JP7154397B2/en
Publication of WO2020213438A1 publication Critical patent/WO2020213438A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L9/00—Electric propulsion with power supply external to the vehicle
    • B60L9/16—Electric propulsion with power supply external to the vehicle using ac induction motors
    • B60L9/18—Electric propulsion with power supply external to the vehicle using ac induction motors fed from dc supply lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
    • B61C17/12—Control gear; Arrangements for controlling locomotives from remote points in the train or when operating in multiple units
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Definitions

  • the present invention relates to a power converter for railway vehicles.
  • a power module equipped with semiconductor elements such as Si and SiC is used in order to convert AC power into DC power or convert DC power into AC power.
  • the power conversion circuit mainly consists of a power module, a filter capacitor, and a laminated bus bar that electrically connects them, and has a characteristic that high-frequency potential fluctuation occurs due to switching operation.
  • the power module that constitutes the main circuit of the power conversion circuit is mounted on a heat exchanger made of a metal material such as aluminum, which has excellent thermal conductivity, in order to efficiently transfer the heat generated by the switching operation.
  • a heat exchanger made of a metal material has excellent thermal conductivity, but also has excellent electrical conductivity, so that high-frequency potential fluctuations due to switching operations may be transmitted to the heat exchanger.
  • the power converter in a power converter that incorporates a structure in which a heat exchanger with a power module mounted is directly fastened with bolts to the housing of the power converter, the power converter is conductive because it conducts through the contact surface. High-frequency potential fluctuations are transmitted to the entire housing. Further, since the power conversion device is also connected to the vehicle body via the grounding circuit, the influence of the high frequency potential fluctuation extends to the vehicle body. Noise generated by such high-frequency potential fluctuations may impair track-side equipment such as communication equipment and signal equipment. Therefore, it is required to electrically block high-frequency potential fluctuations generated from the power conversion circuit so that they do not reach the orbital side equipment.
  • the noise path due to high-frequency potential fluctuation mainly includes a path via a conductor such as a heat exchanger and a housing and a path via space. Therefore, even if the path through the conductor is electrically cut off, if the high-frequency potential fluctuation of the power module and the heat exchanger occurs, it may become radiation noise and be transmitted through the space. Blocking radiated noise through space requires the addition of a shield structure and causes an increase in the weight of the entire device, and is not desirable to apply to products.
  • Patent Document 1 the smoothing capacitor of the high-frequency noise source and the housing for storing the smoothing capacitor are insulated from the path through which noise is conducted through the conductor, and then through a resistor.
  • Patent Document 1 describes a configuration in which a smoothing capacitor, which is a source of high-frequency noise, is insulated from surrounding conductors and then installed inside the housing of a power conversion device.
  • a heat exchanger equipped with a large number of power modules occupies a large area with respect to the housing, and when installed inside the housing, the insulating member between the housings becomes large and the power conversion device becomes heavy.
  • An object of the present invention is to provide a power conversion device for railway vehicles that can effectively block noise while having a compact and lightweight configuration.
  • one of the representative power conversion devices for railway vehicles of the present invention is made of a housing formed of a conductive material, a power module, and a conductive material on which the power module is mounted.
  • a power conversion device for a railroad vehicle having a formed heat exchanger, an insulating plate is arranged so as to surround the outer periphery of a housing opening provided in the housing, and the power module is placed in the housing. This is achieved by fastening the housing and the heat exchanger in the arranged state with the insulating plate interposed therebetween.
  • FIG. 1 is an exploded view of a power conversion device for a railway vehicle according to the first embodiment.
  • FIG. 2 is a front view of the electric power conversion device for a railway vehicle according to the first embodiment.
  • FIG. 3 is an electric circuit diagram of the first embodiment.
  • FIG. 4 is a detailed view of the inside of the housing according to the first embodiment.
  • FIG. 5 is a cross-sectional view of the fastening portion of the first embodiment.
  • FIG. 6 is a diagram showing a stepped insulating member and a stepped metal member according to the first embodiment.
  • FIG. 7 is a cross-sectional view of the fastening portion of the second embodiment.
  • FIG. 8 is a diagram showing a stepped insulating member and a stepped metal member according to the second embodiment.
  • the first embodiment will be described with reference to FIGS. 1 to 6.
  • a railroad vehicle power converter mounted under the floor of a vehicle body and for a structure in which a heat exchanger is suspended, or for a railroad vehicle power converter mounted on the roof of the vehicle body. It is preferably applied to structures with protruding heat exchangers.
  • the present embodiment can be applied to a vehicle body having a sufficient space in the direction of gravity between the vehicle body and the track or between the vehicle body and the overhead wire.
  • a method that does not use the action of gravity for cooling for example, a running air cooling method that uses convection generated when the vehicle body travels, or a forced air cooling method that uses a fan or blower.
  • the method and the like can be mentioned.
  • the direction of the axial force for fastening the heat exchanger is parallel to the direction of gravity. Further, when the heat exchanger is fastened using the axial force in the direction parallel to the gravity direction, there are a mode of fastening in the direction along the gravity and a mode in which the heat exchanger is fastened in the direction against the gravity.
  • An example of fastening against the direction of gravity (the heat exchanger is suspended) will be described as an example.
  • the heat exchanger may be fastened to the housing in the direction along the gravity. In the drawings below, the direction of gravity is indicated by the arrow G.
  • FIG. 1 is an exploded view showing a configuration in which a heat exchanger 5 is fastened to a housing 2 of a power conversion device 1 for a railroad vehicle against the direction of gravity indicated by an arrow G.
  • the housing 2, the insulating plate 4, and the heat exchanger 5 are arranged in this order from above in the direction of gravity indicated by the arrow G, and further, the heat exchanger 5 is provided by the fastening bolt 8 via the stepped insulating member 6 and the stepped metal member 7. And the housing 2 are fastened.
  • the housing 2 is a conductor formed of a conductive material such as iron, stainless steel, or aluminum.
  • the heat exchanger 5 is a conductor formed of a conductive material such as aluminum or copper, which is a metal material having excellent thermal conductivity. Therefore, when directly fastened, the housing 2 and the heat exchanger 5 become conductive via the contact surface. Therefore, in the present embodiment, the rectangular frame plate-shaped insulating plate 4 is arranged so as to surround the outer periphery of the housing opening 3, and is sandwiched between them. The insulating plate 4 is held in close contact with the lower surface of the housing 2 and the flange portion 5a of the heat exchanger 5 over the entire circumference.
  • the flange portion 5a of the heat exchanger 5 is fastened to the housing 2.
  • the housing opening 3 is closed, and the inside of the housing is shielded from the outside air. That is, the heat exchanger 5 also functions as a cover for the housing opening 3.
  • the external dimensions of the flange portion 5a of the heat exchanger 5 are substantially equal to the external dimensions of the insulating plate 4, and by reducing the frame width of the insulating plate 4, the contact area between the housing 2 and the heat exchanger 5 can be reduced. Minimal, electrical insulation can be achieved.
  • the structure including the heat exchanger 5, the power module 9, the filter capacitor 10, and the laminated bus bar 11 is a functionally complete unit, which is hereinafter referred to as a power unit 12 (FIG. 3).
  • FIG. 3 is a diagram showing an electric circuit of the present embodiment
  • FIG. 4 is a detailed internal view of the housing 2.
  • the heat exchanger 5 since the heat exchanger 5 is insulated from the surrounding conductors, the high-frequency potential fluctuation generated from the power module 9 is conducted to the heat exchanger 5. However, it does not conduct to the outside through the conductor. However, since the path transmitted through the space is not cut off, the problem of radiation noise remains.
  • the surface of the heat exchanger 5 is grounded to the vehicle body (not shown) by the grounding wiring 14 via the noise reduction resistor 13.
  • the potentials of the power module 9 and the heat exchanger 5 are lowered, so that the radiation noise is reduced, and further, by narrowing down the noise conduction path to one, it becomes possible to control the noise on that path.
  • the grounding wiring 14 also exists in the electric power conversion device for railway vehicles, it is aggregated at the grounding wiring aggregation point 15 which is the grounding point in the electric power conversion device for railway vehicles and electrically connected to the vehicle body. It was configured to be.
  • FIG. 5 is an enlarged cross-sectional view showing the periphery of the fastening portion when the heat exchanger 5 is fastened to the housing 2 of the electric power conversion device 1 for a railroad vehicle along the direction of gravity indicated by the arrow G.
  • the present embodiment is characterized by the stepped shape of the stepped insulating member 6 and the stepped metal member 7 provided at the fastening portion.
  • FIG. 6 shows an exploded perspective view of the stepped insulating member 6 and the stepped metal member 7.
  • a resin such as a glass cloth epoxy resin laminated plate can be used, and as the material of the stepped metal member 7, stainless steel (SUS) or the like can be used.
  • the stepped insulating member 6 forms an annular inner stepped portion (insulating stepped portion) 6b protruding inside the upper end of the insulating hollow cylindrical member 6a.
  • the stepped metal member 7 is provided with an annular outer stepped portion (metal stepped portion) 7b projecting to the outside of the lower end of the metal hollow cylindrical member 7a so as to abut against the inner stepped portion 6b.
  • the metal hollow cylindrical member 7a is inserted into the inner stepped portion 6b, and the insulating hollow cylindrical member 6a surrounds the outer periphery of the outer stepped portion 7b.
  • the flange portion 5a of the heat exchanger 5 is formed with a plurality of bolt holes 5b having a stepped surface 5c (only one is shown in FIG. 5).
  • the upper end of the fastening bolt 8 inserted into the stepped insulating member 6 and the stepped metal member 7 is inserted into the bolt hole 5b and screwed into the screw hole 2a of the housing 2.
  • the outer stepped portion 7b of the stepped metal member 7 pressed upward by the head of the fastening bolt 8 and the stepped surface 5c of the bolt hole 5b
  • the inner stepped portion 6b of the stepped insulating member 6 is sandwiched.
  • the fastening force is transmitted from the outer stepped portion 7b to the stepped surface 5c via the inner stepped portion 6b, and the heat exchanger 5 can be attached to the housing 2.
  • the fastening bolt 8 is tightened, the upper end of the stepped metal member 7 comes into contact with the lower surface of the housing 2, and the lower end of the stepped metal member 7 comes into contact with the head of the fastening bolt 8.
  • the fastening bolt 8 is fixed to the housing 2 via the stepped metal member 7 by applying the axial force of.
  • the inner stepped portion 6b and the outer stepped portion 7b are within the allowable stress range even at the time of fastening by adjusting the number of fastening points and the contact area of the stepped portion with respect to the own weight of the heat exchanger 5 to be held. It is possible to maintain.
  • the bolt hole 5b and the metal hollow cylindrical member 7a have a dimensional relationship that does not come into contact with each other even if they are eccentric within the processing tolerance.
  • both the fastening bolt 8 and the stepped metal member 7 are conductors, the housing 2 and the stepped metal member 7 are electrically connected by the fastening, but there is a step between the stepped metal member 7 and the heat exchanger 5. Since the attached insulating member 6 is interposed, the housing 2 and the heat exchanger 5 are electrically insulated from each other. As described above, the fastening force can be transmitted while ensuring the insulation between the housing 2 and the heat exchanger 5 and suppressing the influence of noise.
  • the outer diameter A of the outer stepped portion 7b of the stepped metal member 7 is made larger than the hole diameter B of the bolt hole 5b of the heat exchanger 5 through which the fastening bolt 8 is inserted (FIG. 5). ).
  • the weight of the housing 2 can be reduced by the amount of the housing opening 3. Further, by arranging the insulating plate 4 so as to surround the outer periphery of the housing opening 3, the insulating plate 4 is limited to the range sandwiched between the housing 2 and the flange portion 5a of the heat exchanger 5. You can reduce the weight.
  • the second embodiment will be described with reference to FIGS. 7 and 8.
  • the assumed structure of the present embodiment is a structure in which a heat exchanger is attached from the side to a power conversion device for a railway vehicle mounted under the floor of a vehicle body.
  • the left side is the direction of gravity as shown by the arrow G.
  • the cooling method of the heat exchanger include a heat pipe cooling method in which heat exchange is performed by a phase change of the refrigerant, and a natural wind cooling method using convection due to a rise in the temperature of the air in contact with the heat exchanger.
  • the axial force for fastening the heat exchanger is perpendicular to the direction of gravity. Duplicate description will be omitted for the same configuration as in the first embodiment.
  • the power unit 12 of the first embodiment described above can also be attached by the same method. However, the difference from the first embodiment is that the power unit 12 is raised by the lifting cart, raised to a height at which it can be attached, and then the power unit 12 is pushed horizontally (upward in FIG. 7) with respect to the housing 2. It is to be installed with.
  • the power unit 12 mounted on the electric power converter for a railway vehicle often weighs more than 100 kg, which causes two major problems when it is mounted in the horizontal direction.
  • One problem is that the work itself of pushing in the horizontal direction is difficult because the power unit 12 is heavy.
  • it is effective to install a structure made of a slippery material such as Teflon (registered trademark) under the frame of the power unit 12 and reduce the required pushing force by sliding this structure. is there.
  • Another problem is that the weight of the power unit 12 causes the heat exchanger 5 to be displaced downward in the vertical direction (to the left in FIG. 7), and the heat exchanger 5 and the stepped metal member 7 may come into contact with each other. ..
  • the weight of the power unit 12 causes the heat exchanger 5 to be displaced downward in the vertical direction (to the left in FIG. 7), and the heat exchanger 5 and the stepped metal member 7 may come into contact with each other. ..
  • the weight of the power unit 12 causes the heat exchanger 5 to be displaced downward in the vertical direction (to the left in FIG. 7), and the heat exchanger 5 and the stepped metal member 7 may come into contact with each other. ..
  • the stepped insulating member 6 may be deformed or damaged due to the creep phenomenon, so that the above problem becomes apparent. Therefore, in the case of fastening along the horizontal direction as in the second embodiment, it is desirable to solve such a problem by using a stepped member having a shape different from that in the case of fastening along the
  • FIG. 7 is a cross-sectional view showing details of the fastening form when the heat exchanger 5 is fastened to the housing 2 of the electric power conversion device for a railroad vehicle in the horizontal direction (direction perpendicular to gravity).
  • FIG. 8 is a perspective view showing a stepped insulating member 18 and a stepped metal member 19 suitable for fastening in the horizontal direction. The procedure for assembling the stepped insulating member 18, the stepped metal member 19, and the fastening bolt 8 is the same as that of the first embodiment, and thus the description thereof will be omitted.
  • the stepped insulating member 18 has a structure in which a step is further added to the outside of the stepped insulating member 6 of the first embodiment.
  • the stepped insulating member 18 has an inner stepped portion (insulated stepped portion) 18b projecting inside the upper end of the insulating hollow cylindrical member 18a, and further projecting in the axial direction from the inner circumference of the inner stepped portion 18b. It has an extended cylindrical portion 18c.
  • the inner stepped portion 18b has an annular shape, and the extending cylindrical portion 18c has a cylindrical shape having a diameter smaller than that of the insulating hollow cylindrical member 18a.
  • the stepped metal member 19 is provided with an outer stepped portion (metal stepped portion) 19b protruding outward from the lower end of the metal hollow cylindrical member 19a, similarly to the stepped metal member 7 of the first embodiment. ..
  • the metal hollow cylindrical member 19a has a structure in which the outer diameter is reduced by the stepped portion on the outside of the stepped insulating member 18.
  • the outer diameter of the outer stepped portion 19b is made larger than the hole diameter of the bolt hole 5b of the heat exchanger 5 through which the fastening bolt 8 is inserted.
  • the stepped insulating member 18 By providing the stepped insulating member 18, even if the heat exchanger 5 is displaced downward in the vertical direction due to its own weight, the extending cylindrical portion 18c is interposed between the metal hollow cylindrical member 19a and the flange portion 5a of the heat exchanger 5. Therefore, the heat exchanger 5 does not come into contact with the stepped metal member 19, and the insulation between the two is maintained. As in the first embodiment, even if the stepped insulating member 18 intervening is damaged, the stepped metal member 19 intervening supports the weight of the heat exchanger 5. be able to.
  • the stepped insulating member 18 and the stepped metal member 19 of the second embodiment may be used in a mounting mode in which the direction of gravity is parallel to the axial force as shown in FIG.
  • the present invention is not limited to the above-described embodiment, and includes various modifications.
  • the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations.
  • it is possible to replace a part of the configuration in one embodiment with the configuration of another embodiment and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. ..

Abstract

Provided is a power conversion device for a railway vehicle which has a compact and lightweight configuration and is yet capable of effectively blocking noise. A heat exchanger 5 and a frame for holding the heat exchanger 5 are equipped with, for example, a power module 9 for performing power conversion, a filter capacitor 10, and a laminated busbar 11 for electrically connecting the power module 9 and the filter capacitor 10. All these elements are placed within a housing 2 when the heat exchanger 5 is fastened to the housing 2. In addition, an insulating plate 4 is placed on the housing 2 so as to surround a housing opening 3 provided in the housing 2, and is mounted by clamping with flange parts 5a of the heat exchanger 5. Moreover, bolt fastening is performed at bolt fastening parts via stepped insulating members 6 and stepped metal members 7 which transmit fastening forces for supporting the weight of the heat exchanger 5.

Description

鉄道車両用電力変換装置Electric power converter for railway vehicles
　本発明は、鉄道車両用電力変換装置に関する。 The present invention relates to a power converter for railway vehicles.
　一般的な鉄道車両用電力変換装置において、交流電力を直流電力に変換する、あるいは直流電力を交流電力に変換するために、Si、SiC等の半導体素子を実装したパワーモジュールを利用している。電力変換回路は、主にパワーモジュールとフィルタコンデンサ、これらの間を電気的に接続するラミネートブスバーから成り、スイッチング動作に起因して高周波の電位変動が生じるという特性を有する。 In a general electric power converter for railway vehicles, a power module equipped with semiconductor elements such as Si and SiC is used in order to convert AC power into DC power or convert DC power into AC power. The power conversion circuit mainly consists of a power module, a filter capacitor, and a laminated bus bar that electrically connects them, and has a characteristic that high-frequency potential fluctuation occurs due to switching operation.
　また、電力変換回路の主回路を構成するパワーモジュールは、スイッチング動作によって発生した熱を効率良く伝熱させるために、熱伝導性に優れたアルミ等の金属材料から成る熱交換器に実装されている。金属材料からなる熱交換器は、熱伝導性に優れるが、電気伝導性にも優れているため、スイッチング動作による高周波の電位変動が熱交換器にも伝わる恐れがある。 In addition, the power module that constitutes the main circuit of the power conversion circuit is mounted on a heat exchanger made of a metal material such as aluminum, which has excellent thermal conductivity, in order to efficiently transfer the heat generated by the switching operation. There is. A heat exchanger made of a metal material has excellent thermal conductivity, but also has excellent electrical conductivity, so that high-frequency potential fluctuations due to switching operations may be transmitted to the heat exchanger.
　特に、電力変換装置の筐体に、パワーモジュールを実装した熱交換器をボルトで直接締結する構造を取り入れている電力変換装置においては、接触面を介して導通しているため、電力変換装置の筐体全体にも高周波の電位変動が伝わる。さらに、電力変換装置は接地回路を介して車体にも接続されているため、高周波の電位変動の影響は車体にも及ぶ。このような高周波の電位変動に起因して生ずるノイズは、通信設備や信号設備などの軌道側設備へ障害を与える可能性もある。したがって、電力変換回路から発生する高周波の電位変動を電気的に遮断して、軌道側設備に到達させないようにすることが求められる。 In particular, in a power converter that incorporates a structure in which a heat exchanger with a power module mounted is directly fastened with bolts to the housing of the power converter, the power converter is conductive because it conducts through the contact surface. High-frequency potential fluctuations are transmitted to the entire housing. Further, since the power conversion device is also connected to the vehicle body via the grounding circuit, the influence of the high frequency potential fluctuation extends to the vehicle body. Noise generated by such high-frequency potential fluctuations may impair track-side equipment such as communication equipment and signal equipment. Therefore, it is required to electrically block high-frequency potential fluctuations generated from the power conversion circuit so that they do not reach the orbital side equipment.
　高周波の電位変動によるノイズの経路には、主として、熱交換器や筐体等の導体を介する経路と、空間を介する経路とがある。したがって、仮に導体を介した経路を電気的に遮断したとしても、パワーモジュールと熱交換器の高周波の電位変動が生じると、放射ノイズとなって空間を介して伝わる恐れがある。空間を介した放射ノイズの遮断は、シールド構造の追加等が必要となり、装置全体の重量化等を招くため、製品に適用するのは望ましくない。 The noise path due to high-frequency potential fluctuation mainly includes a path via a conductor such as a heat exchanger and a housing and a path via space. Therefore, even if the path through the conductor is electrically cut off, if the high-frequency potential fluctuation of the power module and the heat exchanger occurs, it may become radiation noise and be transmitted through the space. Blocking radiated noise through space requires the addition of a shield structure and causes an increase in the weight of the entire device, and is not desirable to apply to products.
　このような背景の中、特許文献１では導体を介してノイズが伝導する経路に対して、高周波ノイズ源の平滑コンデンサと、これを格納する筐体間を絶縁した上で、抵抗器を介して電気的に接続する手法を提案している。かかる手法によれば、ノイズの伝導経路を１つに絞り、その経路上でノイズをコントロールすることができる。 Against this background, in Patent Document 1, the smoothing capacitor of the high-frequency noise source and the housing for storing the smoothing capacitor are insulated from the path through which noise is conducted through the conductor, and then through a resistor. We are proposing a method of electrically connecting. According to such a method, it is possible to narrow down the noise conduction path to one and control the noise on that path.
特開２００７－８９３９５号公報JP-A-2007-89395
　特許文献１では、高周波のノイズ源となる平滑コンデンサを周囲の導体から絶縁した上で、電力変換装置の筐体内部に設置する構成が示されている。しかし、例えば、多数のパワーモジュールを実装した熱交換器は、筐体に対し占有する面積も大きく、筐体内部に設置する場合は筐体間の絶縁部材が大型化し、電力変換装置の重量化を招く。 Patent Document 1 describes a configuration in which a smoothing capacitor, which is a source of high-frequency noise, is insulated from surrounding conductors and then installed inside the housing of a power conversion device. However, for example, a heat exchanger equipped with a large number of power modules occupies a large area with respect to the housing, and when installed inside the housing, the insulating member between the housings becomes large and the power conversion device becomes heavy. Invite.
　また、熱交換器と筐体の間に挿入する絶縁部材として例えば樹脂材料を用いた場合、長期使用により劣化して強度低下を招く恐れがあるが、たとえ劣化が生じても熱交換器を確実に保持できるようにする必要がある。 Further, when a resin material is used as an insulating member to be inserted between the heat exchanger and the housing, for example, there is a risk of deterioration due to long-term use and a decrease in strength, but even if deterioration occurs, the heat exchanger is reliable. Need to be able to hold in.
　本発明は、小型軽量である構成を有しながらもノイズを効果的に遮断できる鉄道車両用電力変換装置を提供することを目的とする。 An object of the present invention is to provide a power conversion device for railway vehicles that can effectively block noise while having a compact and lightweight configuration.
　上記課題を解決するために、代表的な本発明の鉄道車両用電力変換装置の一つは、導電性素材から形成された筐体と、パワーモジュールと、前記パワーモジュールを実装した導電性素材から形成された熱交換器とを有する鉄道車両用電力変換装置であって、前記筐体に設けた筐体開口部の外部周囲を囲うように絶縁板が配置され、前記パワーモジュールを前記筐体内に配置した状態で、前記絶縁板を介在させて前記筐体と前記熱交換器とが締結されたことにより達成される。 In order to solve the above problems, one of the representative power conversion devices for railway vehicles of the present invention is made of a housing formed of a conductive material, a power module, and a conductive material on which the power module is mounted. A power conversion device for a railroad vehicle having a formed heat exchanger, an insulating plate is arranged so as to surround the outer periphery of a housing opening provided in the housing, and the power module is placed in the housing. This is achieved by fastening the housing and the heat exchanger in the arranged state with the insulating plate interposed therebetween.
　本発明によれば、小型軽量である構成を有しながらもノイズを効果的に遮断できる鉄道車両用電力変換装置を提供することができる。
　上記した以外の課題、構成及び効果は、以下の実施形態の説明により明らかにされる。 According to the present invention, it is possible to provide a power conversion device for a railway vehicle capable of effectively blocking noise while having a compact and lightweight configuration.
Issues, configurations and effects other than those described above will be clarified by the description of the following embodiments.
図１は、第１の実施形態における鉄道車両用電力変換装置の分解図である。FIG. 1 is an exploded view of a power conversion device for a railway vehicle according to the first embodiment. 図２は、第１の実施形態における鉄道車両用電力変換装置の正面図である。FIG. 2 is a front view of the electric power conversion device for a railway vehicle according to the first embodiment. 図３は、第１の実施形態の電気回路図である。FIG. 3 is an electric circuit diagram of the first embodiment. 図４は、第１の実施形態の筐体内部詳細図である。FIG. 4 is a detailed view of the inside of the housing according to the first embodiment. 図５は、第１の実施形態の締結部の断面図である。FIG. 5 is a cross-sectional view of the fastening portion of the first embodiment. 図６は、第１の実施形態における段付き絶縁部材と段付き金属部材を示す図である。FIG. 6 is a diagram showing a stepped insulating member and a stepped metal member according to the first embodiment. 図７は、第２の実施形態の締結部の断面図である。FIG. 7 is a cross-sectional view of the fastening portion of the second embodiment. 図８は、第２の実施形態における段付き絶縁部材と段付き金属部材を示す図である。FIG. 8 is a diagram showing a stepped insulating member and a stepped metal member according to the second embodiment.
［第１の実施形態］
　図１～図６を用いて第１の実施形態を説明する。本実施形態は、車体の床下に艤装された鉄道車両用電力変換装置に対して、さらに熱交換器が吊下がる構造、もしくは車体の屋根上に艤装された鉄道車両用電力変換装置に対して、熱交換器が突き出る構造に適用されると好ましい。換言すれば、車体－軌道間、もしくは車体－架線間における重力方向のスペースを十分に有した車体に、本実施形態を適用することができる。 [First Embodiment]
The first embodiment will be described with reference to FIGS. 1 to 6. In this embodiment, for a railroad vehicle power converter mounted under the floor of a vehicle body, and for a structure in which a heat exchanger is suspended, or for a railroad vehicle power converter mounted on the roof of the vehicle body. It is preferably applied to structures with protruding heat exchangers. In other words, the present embodiment can be applied to a vehicle body having a sufficient space in the direction of gravity between the vehicle body and the track or between the vehicle body and the overhead wire.
　また、熱交換器の冷却方式に関しては、重力の作用を冷却に利用しない方式、例えば、車体が走行することで発生する対流を利用する走行風冷方式や、ファンやブロワを利用する強制風冷方式等が挙げられる。 Regarding the cooling method of the heat exchanger, a method that does not use the action of gravity for cooling, for example, a running air cooling method that uses convection generated when the vehicle body travels, or a forced air cooling method that uses a fan or blower. The method and the like can be mentioned.
　本実施形態では、熱交換器を締結する軸力の向きは重力方向と平行になる。また、重力方向と平行な向きの軸力を用いて熱交換器を締結する場合、重力に沿った方向に締結する態様と、重力に逆らう方向に締結する態様とがあるが、本実施形態では重力方向に逆らって締結する（熱交換器が吊下がる）態様を例に取り説明する。ただし、筐体に対し重力に沿った方向に熱交換器を締結してもよい。以下の図面において、重力方向を矢印Ｇにて示す。 In this embodiment, the direction of the axial force for fastening the heat exchanger is parallel to the direction of gravity. Further, when the heat exchanger is fastened using the axial force in the direction parallel to the gravity direction, there are a mode of fastening in the direction along the gravity and a mode in which the heat exchanger is fastened in the direction against the gravity. An example of fastening against the direction of gravity (the heat exchanger is suspended) will be described as an example. However, the heat exchanger may be fastened to the housing in the direction along the gravity. In the drawings below, the direction of gravity is indicated by the arrow G.
　図１は、鉄道車両用電力変換装置１の筐体２に対して、熱交換器５を矢印Ｇで示す重力方向に逆らって締結する場合の構成を示す分解図である。矢印Ｇで示す重力方向の上方から順に筐体２、絶縁板４、熱交換器５が配置され、更に段付き絶縁部材６と段付き金属部材７を介して、締結ボルト８で熱交換器５と筐体２とが締結される。 FIG. 1 is an exploded view showing a configuration in which a heat exchanger 5 is fastened to a housing 2 of a power conversion device 1 for a railroad vehicle against the direction of gravity indicated by an arrow G. The housing 2, the insulating plate 4, and the heat exchanger 5 are arranged in this order from above in the direction of gravity indicated by the arrow G, and further, the heat exchanger 5 is provided by the fastening bolt 8 via the stepped insulating member 6 and the stepped metal member 7. And the housing 2 are fastened.
　筐体２は、鉄、ステンレス、アルミ等の金属材料の導電性素材から形成された導体である。熱交換器５は、アルミや銅等の熱伝導性に優れた金属材料の導電性素材から形成された導体である。ゆえに、直接締結すると、筐体２と熱交換器５は接触面を介して導通してしまう。そこで本実施の形態では、筐体開口部３の外部周囲を囲うように矩形枠板状の絶縁板４を配置し、間に挟み込んでいる。絶縁板４は、筐体２の下面と熱交換器５のフランジ部５ａとに全周で密着して保持されている。 The housing 2 is a conductor formed of a conductive material such as iron, stainless steel, or aluminum. The heat exchanger 5 is a conductor formed of a conductive material such as aluminum or copper, which is a metal material having excellent thermal conductivity. Therefore, when directly fastened, the housing 2 and the heat exchanger 5 become conductive via the contact surface. Therefore, in the present embodiment, the rectangular frame plate-shaped insulating plate 4 is arranged so as to surround the outer periphery of the housing opening 3, and is sandwiched between them. The insulating plate 4 is held in close contact with the lower surface of the housing 2 and the flange portion 5a of the heat exchanger 5 over the entire circumference.
　図２の正面図に示すように、筐体開口部３の開口寸法は、熱交換器５のフランジ部５ａの外形寸法より小さいため、熱交換器５のフランジ部５ａを筐体２に締結することで筐体開口部３は閉じ、筐体内部は外気から遮断される。すなわち、熱交換器５は筐体開口部３のカバーとしても機能する。熱交換器５のフランジ部５ａの外形寸法は、絶縁板４の外形寸法に略等しくなっており、絶縁板４の枠幅を小さくすることで、筐体２と熱交換器５に対する接触面積を最小に、電気的絶縁を図ることができる。 As shown in the front view of FIG. 2, since the opening dimension of the housing opening 3 is smaller than the external dimension of the flange portion 5a of the heat exchanger 5, the flange portion 5a of the heat exchanger 5 is fastened to the housing 2. As a result, the housing opening 3 is closed, and the inside of the housing is shielded from the outside air. That is, the heat exchanger 5 also functions as a cover for the housing opening 3. The external dimensions of the flange portion 5a of the heat exchanger 5 are substantially equal to the external dimensions of the insulating plate 4, and by reducing the frame width of the insulating plate 4, the contact area between the housing 2 and the heat exchanger 5 can be reduced. Minimal, electrical insulation can be achieved.
　ここで、図１、図２においては図示を省略しているが、熱交換器５を保持するフレーム及び熱交換器５の上面には、電力変換を担うパワーモジュール９、フィルタコンデンサ１０、これらの間を電気的に接続するラミネートブスバー１１等の部品が実装されている。したがって、熱交換器５のフランジ部５ａを筐体２に締結すると、これらの部品はすべて、筐体開口部３を介して筐体２の内部に挿入され配置される構成になっている（図２の点線参照）。熱交換器５、パワーモジュール９、フィルタコンデンサ１０、ラミネートブスバー１１から成る構造は、機能的に完結したユニットであり、以下、パワーユニット１２と称する（図３）。 Here, although not shown in FIGS. 1 and 2, on the frame holding the heat exchanger 5 and the upper surface of the heat exchanger 5, a power module 9 responsible for power conversion, a filter capacitor 10, and these are Parts such as a laminated bus bar 11 that electrically connects the spaces are mounted. Therefore, when the flange portion 5a of the heat exchanger 5 is fastened to the housing 2, all of these parts are inserted and arranged inside the housing 2 via the housing opening 3 (FIG. FIG. See the dotted line in 2). The structure including the heat exchanger 5, the power module 9, the filter capacitor 10, and the laminated bus bar 11 is a functionally complete unit, which is hereinafter referred to as a power unit 12 (FIG. 3).
　図３、図４を用いて、筐体２内部の構成を説明する。図３は、本実施形態の電気回路を示した図であり、図４は筐体２の内部詳細図である。ここで、ノイズ伝導の観点から内部構成に着目すると、熱交換器５は周囲の導体から絶縁されているから、パワーモジュール９から発生した高周波の電位変動は、熱交換器５までは伝導しても、それより外方には導体を介しては伝導しない。ただし、空間を介して伝わる経路は断たれていないため、放射ノイズの問題が残る。 The configuration inside the housing 2 will be described with reference to FIGS. 3 and 4. FIG. 3 is a diagram showing an electric circuit of the present embodiment, and FIG. 4 is a detailed internal view of the housing 2. Here, focusing on the internal configuration from the viewpoint of noise conduction, since the heat exchanger 5 is insulated from the surrounding conductors, the high-frequency potential fluctuation generated from the power module 9 is conducted to the heat exchanger 5. However, it does not conduct to the outside through the conductor. However, since the path transmitted through the space is not cut off, the problem of radiation noise remains.
　そこで、本実施形態では、熱交換器５の表面から、ノイズ低減抵抗１３を介した上で、接地配線１４にて不図示の車体に接地する構成としている。これにより、パワーモジュール９及び熱交換器５の電位が低くなるため放射ノイズが低減し、更にノイズの伝導経路を１つに絞ることで、その経路上でノイズをコントロールすることが可能になる。なお、接地配線１４は鉄道車両用電力変換装置内で他にも存在するため、鉄道車両用電力変換装置内の接地点である接地配線集約箇所１５に集約の上、車体へと電気的に接続する構成とした。 Therefore, in the present embodiment, the surface of the heat exchanger 5 is grounded to the vehicle body (not shown) by the grounding wiring 14 via the noise reduction resistor 13. As a result, the potentials of the power module 9 and the heat exchanger 5 are lowered, so that the radiation noise is reduced, and further, by narrowing down the noise conduction path to one, it becomes possible to control the noise on that path. Since the grounding wiring 14 also exists in the electric power conversion device for railway vehicles, it is aggregated at the grounding wiring aggregation point 15 which is the grounding point in the electric power conversion device for railway vehicles and electrically connected to the vehicle body. It was configured to be.
　以上、ノイズ源のパワーモジュール９を実装した熱交換器５を、絶縁を確保しながら筐体２へ実装する構成、および熱交換器５の表面からノイズ低減抵抗１３を介して接地する構成について記載してきた。一方、素材の劣化による影響を予め想定し、その対策を行うことも重要である。そこで、本実施形態による素材の劣化に対応できる構成を以下に示す。図５は、鉄道車両用電力変換装置１の筐体２に対して、熱交換器５を矢印Ｇで示す重力方向に沿って締結する場合における締結部の周辺を示す拡大断面図である。 The configuration in which the heat exchanger 5 on which the power module 9 of the noise source is mounted is mounted on the housing 2 while ensuring insulation, and the configuration in which the surface of the heat exchanger 5 is grounded via the noise reduction resistor 13 are described above. I've done it. On the other hand, it is also important to anticipate the effects of material deterioration and take countermeasures. Therefore, the configuration that can cope with the deterioration of the material according to this embodiment is shown below. FIG. 5 is an enlarged cross-sectional view showing the periphery of the fastening portion when the heat exchanger 5 is fastened to the housing 2 of the electric power conversion device 1 for a railroad vehicle along the direction of gravity indicated by the arrow G.
　本実施形態では、締結部に設けた段付き絶縁部材６と段付き金属部材７の段形状に特徴がある。図６に、段付き絶縁部材６と段付き金属部材７の分解斜視図を示す。段付き絶縁部材６の素材としては、樹脂、例えばガラス布エポキシ樹脂積層板等を用いることができ、また段付き金属部材７の素材としては、ステンレス（ＳＵＳ）等を用いることができる。 The present embodiment is characterized by the stepped shape of the stepped insulating member 6 and the stepped metal member 7 provided at the fastening portion. FIG. 6 shows an exploded perspective view of the stepped insulating member 6 and the stepped metal member 7. As the material of the stepped insulating member 6, a resin such as a glass cloth epoxy resin laminated plate can be used, and as the material of the stepped metal member 7, stainless steel (SUS) or the like can be used.
　まず、段付き絶縁部材６は、絶縁中空円筒部材６ａの上端内側に突出した環状の内側段付き部（絶縁段付き部）６ｂを形成している。一方、段付き金属部材７は、この内側段付き部６ｂに突き当たるように、金属中空円筒部材７ａの下端外側に突出した環状の外側段付き部（金属段付き部）７ｂを設ける。組み付け時には、金属中空円筒部材７ａが内側段付き部６ｂ内に挿通され、また絶縁中空円筒部材６ａが外側段付き部７ｂの外部周囲を囲う。 First, the stepped insulating member 6 forms an annular inner stepped portion (insulating stepped portion) 6b protruding inside the upper end of the insulating hollow cylindrical member 6a. On the other hand, the stepped metal member 7 is provided with an annular outer stepped portion (metal stepped portion) 7b projecting to the outside of the lower end of the metal hollow cylindrical member 7a so as to abut against the inner stepped portion 6b. At the time of assembly, the metal hollow cylindrical member 7a is inserted into the inner stepped portion 6b, and the insulating hollow cylindrical member 6a surrounds the outer periphery of the outer stepped portion 7b.
　熱交換器５のフランジ部５ａには、段差面５ｃを備えたボルト穴５ｂが複数個（図５では１つのみ図示）、形成されている。 The flange portion 5a of the heat exchanger 5 is formed with a plurality of bolt holes 5b having a stepped surface 5c (only one is shown in FIG. 5).
　組み付け時には、段付き絶縁部材６と段付き金属部材７内に挿通した締結ボルト８の上端を、ボルト穴５ｂに挿通して筐体２のねじ穴２ａに螺合させる。かかる状態から、締結ボルト８を締め付けていくと、締結ボルト８の頭部により上方に押圧された段付き金属部材７の外側段付き部７ｂと、ボルト穴５ｂの段差面５ｃとの間で、段付き絶縁部材６の内側段付き部６ｂが挟持される。これにより、内側段付き部６ｂを介して外側段付き部７ｂから段差面５ｃに締結力が伝わり、熱交換器５を筐体２に取り付けることができる。 At the time of assembly, the upper end of the fastening bolt 8 inserted into the stepped insulating member 6 and the stepped metal member 7 is inserted into the bolt hole 5b and screwed into the screw hole 2a of the housing 2. When the fastening bolt 8 is tightened from this state, the outer stepped portion 7b of the stepped metal member 7 pressed upward by the head of the fastening bolt 8 and the stepped surface 5c of the bolt hole 5b The inner stepped portion 6b of the stepped insulating member 6 is sandwiched. As a result, the fastening force is transmitted from the outer stepped portion 7b to the stepped surface 5c via the inner stepped portion 6b, and the heat exchanger 5 can be attached to the housing 2.
　また、締結ボルト８を締め付けてゆくと、段付き金属部材７の上端が筐体２の下面に当接し、段付き金属部材７の下端が締結ボルト８の頭部に当接するので、その後に所定の軸力を付与することで締結ボルト８が段付き金属部材７を介して筐体２に固定される。なお、内側段付き部６ｂと外側段付き部７ｂについては、保持する熱交換器５の自重に対して、締結点数と段付き部の接触面積を調整することで、締結時にも許容応力範囲内に維持することが可能である。ボルト穴５ｂと金属中空円筒部材７ａとは、加工公差の範囲内で偏心しても接しない寸法関係を有する。 Further, as the fastening bolt 8 is tightened, the upper end of the stepped metal member 7 comes into contact with the lower surface of the housing 2, and the lower end of the stepped metal member 7 comes into contact with the head of the fastening bolt 8. The fastening bolt 8 is fixed to the housing 2 via the stepped metal member 7 by applying the axial force of. The inner stepped portion 6b and the outer stepped portion 7b are within the allowable stress range even at the time of fastening by adjusting the number of fastening points and the contact area of the stepped portion with respect to the own weight of the heat exchanger 5 to be held. It is possible to maintain. The bolt hole 5b and the metal hollow cylindrical member 7a have a dimensional relationship that does not come into contact with each other even if they are eccentric within the processing tolerance.
　締結ボルト８と段付き金属部材７はいずれも導体であるため、該締結により筐体２と段付き金属部材７は導通するが、段付き金属部材７と熱交換器５との間には段付き絶縁部材６が介在するので、筐体２と熱交換器５とは電気的に絶縁される。以上により、筐体２と熱交換器５との間の絶縁を確保し、ノイズの影響を抑制しつつ、締結力を伝達することができる。 Since both the fastening bolt 8 and the stepped metal member 7 are conductors, the housing 2 and the stepped metal member 7 are electrically connected by the fastening, but there is a step between the stepped metal member 7 and the heat exchanger 5. Since the attached insulating member 6 is interposed, the housing 2 and the heat exchanger 5 are electrically insulated from each other. As described above, the fastening force can be transmitted while ensuring the insulation between the housing 2 and the heat exchanger 5 and suppressing the influence of noise.
　一方で、絶縁材料として代表的な樹脂材料により絶縁部材を形成したような場合には、長期使用において劣化するという課題がある。一般的な樹脂材料に荷重を継続的に作用させると、徐々に変形が進むクリープ現象が発生することが知られている。そこで、本実施形態では、段付き金属部材７の外側段付き部７ｂの外径Ａを、締結ボルト８を挿通する熱交換器５のボルト穴５ｂの穴径Ｂより大きくしている（図５）。したがって、万が一、クリープ現象により段付き絶縁部材６が破損に至り、熱交換器５が自重により下方に変位した場合でも、外側段付き部７ｂがボルト穴５ｂの周囲に当接することで、熱交換器５の脱落を阻止できる。 On the other hand, when an insulating member is formed of a typical resin material as an insulating material, there is a problem that it deteriorates in long-term use. It is known that when a load is continuously applied to a general resin material, a creep phenomenon in which deformation gradually progresses occurs. Therefore, in the present embodiment, the outer diameter A of the outer stepped portion 7b of the stepped metal member 7 is made larger than the hole diameter B of the bolt hole 5b of the heat exchanger 5 through which the fastening bolt 8 is inserted (FIG. 5). ). Therefore, even if the stepped insulating member 6 is damaged due to the creep phenomenon and the heat exchanger 5 is displaced downward due to its own weight, the outer stepped portion 7b abuts around the bolt hole 5b to exchange heat. It is possible to prevent the vessel 5 from falling off.
　以上述べた本実施形態によれば、筐体２に筐体開口部３を設けて熱交換器５で覆うようにすることで、筐体開口部３の分だけ筐体２を軽量化できる。また、筐体開口部３の外周を囲うように絶縁板４を配置することで、絶縁板４を筐体２と熱交換器５のフランジ部５ａに挟持される範囲だけに限定することで、軽量化を図れる。 According to the present embodiment described above, by providing the housing 2 with the housing opening 3 and covering it with the heat exchanger 5, the weight of the housing 2 can be reduced by the amount of the housing opening 3. Further, by arranging the insulating plate 4 so as to surround the outer periphery of the housing opening 3, the insulating plate 4 is limited to the range sandwiched between the housing 2 and the flange portion 5a of the heat exchanger 5. You can reduce the weight.
［第２の実施形態］
　図７、図８を用いて第２の実施形態を説明する。本実施形態の想定される構造としては、車体の床下に艤装された鉄道車両用電力変換装置に対して、熱交換器を側方から取り付ける構造である。図７，８においては、左方を矢印Ｇで示すように重力方向とする。熱交換器の冷却方式に関しては、熱交換を冷媒の相変化によって成すヒートパイプ冷却方式や、熱交換器に接する空気の温度上昇による対流を利用した自然風冷方式等が挙げられる。なお、熱交換器を締結する軸力は重力方向と垂直になる。第１の実施形態と同様の構成については、重複説明を省略する。 [Second Embodiment]
The second embodiment will be described with reference to FIGS. 7 and 8. The assumed structure of the present embodiment is a structure in which a heat exchanger is attached from the side to a power conversion device for a railway vehicle mounted under the floor of a vehicle body. In FIGS. 7 and 8, the left side is the direction of gravity as shown by the arrow G. Examples of the cooling method of the heat exchanger include a heat pipe cooling method in which heat exchange is performed by a phase change of the refrigerant, and a natural wind cooling method using convection due to a rise in the temperature of the air in contact with the heat exchanger. The axial force for fastening the heat exchanger is perpendicular to the direction of gravity. Duplicate description will be omitted for the same configuration as in the first embodiment.
　組立の順序に沿って本実施形態を説明する。艤装用の設備（不図示）に吊られた鉄道車両用電力変換装置の筐体２の下方（図７で左方）で、昇降台車に乗せたパワーユニット１２を所定位置まで移動した後、昇降台車上でパワーユニット１２を上昇（図７で右方に変位）させて筐体２に取りつける。 This embodiment will be described according to the order of assembly. After moving the power unit 12 mounted on the lifting bogie to a predetermined position below the housing 2 (left in FIG. 7) of the power converter for railway vehicles suspended from the equipment for mounting (not shown), the lifting bogie The power unit 12 is raised (displaced to the right in FIG. 7) and attached to the housing 2.
　上述した第１の実施形態のパワーユニット１２も、同様な手法で取り付けを行うことができる。ただし、第１の実施形態と異なる点としては、昇降台車でパワーユニット１２を上昇させ、取り付けられる高さまで上昇させた後、パワーユニット１２ごと、筐体２に対して水平（図７で上方）に押し込んで取り付けることである。 The power unit 12 of the first embodiment described above can also be attached by the same method. However, the difference from the first embodiment is that the power unit 12 is raised by the lifting cart, raised to a height at which it can be attached, and then the power unit 12 is pushed horizontally (upward in FIG. 7) with respect to the housing 2. It is to be installed with.
　ここで、鉄道車両用電力変換装置に搭載するパワーユニット１２は、１００ｋｇを超す重量物となることも多く、水平方向に取りつける際に２つの大きな問題が生じる。一つの問題は、パワーユニット１２が重量物ゆえに水平方向に押し込む作業自体が困難であることである。かかる問題に対しては、パワーユニット１２のフレーム下方にテフロン（登録商標）等の滑りの良い材料から成る構造物を設置し、この構造物の摺動によって必要な押し込み力を低減させることが有効である。 Here, the power unit 12 mounted on the electric power converter for a railway vehicle often weighs more than 100 kg, which causes two major problems when it is mounted in the horizontal direction. One problem is that the work itself of pushing in the horizontal direction is difficult because the power unit 12 is heavy. To solve this problem, it is effective to install a structure made of a slippery material such as Teflon (registered trademark) under the frame of the power unit 12 and reduce the required pushing force by sliding this structure. is there.
　もう一つの問題は、パワーユニット１２の自重によって、鉛直方向下方（図７で左方）に熱交換器５が変位し、熱交換器５と段付き金属部材７が接触する恐れがあることである。ここで、使用開始時には、段付き絶縁部材６と段付き金属部材７の加工公差を管理することで、自重による接触を回避できるため、接触の問題は生じない。
　しかし、第１の実施形態に関連して述べたように、長期使用を想定するとクリープ現象による段付き絶縁部材６の変形、破損が起こりうるので、上記問題が顕在化する。そこで、第２の実施形態のように水平方向に沿って締結する場合は、重力方向に沿って締結する場合とは異なる形状の段付き部材を使用して、かかる問題を解消することが望ましい。 Another problem is that the weight of the power unit 12 causes the heat exchanger 5 to be displaced downward in the vertical direction (to the left in FIG. 7), and the heat exchanger 5 and the stepped metal member 7 may come into contact with each other. .. Here, at the start of use, by managing the processing tolerances of the stepped insulating member 6 and the stepped metal member 7, contact due to its own weight can be avoided, so that the contact problem does not occur.
However, as described in relation to the first embodiment, assuming long-term use, the stepped insulating member 6 may be deformed or damaged due to the creep phenomenon, so that the above problem becomes apparent. Therefore, in the case of fastening along the horizontal direction as in the second embodiment, it is desirable to solve such a problem by using a stepped member having a shape different from that in the case of fastening along the direction of gravity.
　図７は、鉄道車両用電力変換装置の筐体２に対して熱交換器５を水平方向(重力に対し、垂直の方向)に締結する場合における締結形態の詳細を示す断面図である。また、図８は、水平方向に沿って締結する場合に適した段付き絶縁部材１８と段付き金属部材１９を示す斜視図である。なお、段付き絶縁部材１８と段付き金属部材１９と締結ボルト８による組付手順については、第１の実施形態と同様であるため説明を省略する。 FIG. 7 is a cross-sectional view showing details of the fastening form when the heat exchanger 5 is fastened to the housing 2 of the electric power conversion device for a railroad vehicle in the horizontal direction (direction perpendicular to gravity). Further, FIG. 8 is a perspective view showing a stepped insulating member 18 and a stepped metal member 19 suitable for fastening in the horizontal direction. The procedure for assembling the stepped insulating member 18, the stepped metal member 19, and the fastening bolt 8 is the same as that of the first embodiment, and thus the description thereof will be omitted.
　段付き絶縁部材１８は、第１の実施形態の段付き絶縁部材６に対して、更に外側に段付きを追加した構造である。具体的には、段付き絶縁部材１８は、絶縁中空円筒部材１８ａの上端内側に突出した内側段付き部（絶縁段付き部）１８ｂと、更に内側段付き部１８ｂの内周から軸方向に突出した延出円筒部１８ｃとを有する。内側段付き部１８ｂは環状であり、延出円筒部１８ｃは、絶縁中空円筒部材１８ａより小径の円筒状である。 The stepped insulating member 18 has a structure in which a step is further added to the outside of the stepped insulating member 6 of the first embodiment. Specifically, the stepped insulating member 18 has an inner stepped portion (insulated stepped portion) 18b projecting inside the upper end of the insulating hollow cylindrical member 18a, and further projecting in the axial direction from the inner circumference of the inner stepped portion 18b. It has an extended cylindrical portion 18c. The inner stepped portion 18b has an annular shape, and the extending cylindrical portion 18c has a cylindrical shape having a diameter smaller than that of the insulating hollow cylindrical member 18a.
　一方、段付き金属部材１９は、第１の実施形態の段付き金属部材７と同様に、金属中空円筒部材１９ａの下端外側に突出した外側段付き部（金属段付き部）１９ｂを設けている。また、金属中空円筒部材１９ａは段付き絶縁部材１８の外側の段付き分だけ、外径を小さくした構造である。段付き絶縁部材１８と、段付き金属部材１９とを組み合わせたときに、金属中空円筒部材１９ａの一部は延出円筒部１８ｃにより全周を囲われる。本実施形態でも、外側段付き部１９ｂの外径を、締結ボルト８を挿通する熱交換器５のボルト穴５ｂの穴径より大きくしている。 On the other hand, the stepped metal member 19 is provided with an outer stepped portion (metal stepped portion) 19b protruding outward from the lower end of the metal hollow cylindrical member 19a, similarly to the stepped metal member 7 of the first embodiment. .. Further, the metal hollow cylindrical member 19a has a structure in which the outer diameter is reduced by the stepped portion on the outside of the stepped insulating member 18. When the stepped insulating member 18 and the stepped metal member 19 are combined, a part of the metal hollow cylindrical member 19a is surrounded by the extending cylindrical portion 18c. Also in this embodiment, the outer diameter of the outer stepped portion 19b is made larger than the hole diameter of the bolt hole 5b of the heat exchanger 5 through which the fastening bolt 8 is inserted.
　段付き絶縁部材１８を設けることで、熱交換器５が自重によって鉛直方向下方にずれたとしても、金属中空円筒部材１９ａと熱交換器５のフランジ部５ａの間に延出円筒部１８ｃが介在するので、熱交換器５が段付き金属部材１９に接触することはなく両者の絶縁が保たれる。なお、第１の実施形態と同様、万が一、間に介している段付き絶縁部材１８が破損に至ったとしても、間に介している段付き金属部材１９によって、熱交換器５の自重を支えることができる。 By providing the stepped insulating member 18, even if the heat exchanger 5 is displaced downward in the vertical direction due to its own weight, the extending cylindrical portion 18c is interposed between the metal hollow cylindrical member 19a and the flange portion 5a of the heat exchanger 5. Therefore, the heat exchanger 5 does not come into contact with the stepped metal member 19, and the insulation between the two is maintained. As in the first embodiment, even if the stepped insulating member 18 intervening is damaged, the stepped metal member 19 intervening supports the weight of the heat exchanger 5. be able to.
　第２実施形態の段付き絶縁部材１８と段付き金属部材１９を、図５に示すように重力方向が軸力と平行になるような取付態様で用いてもよい。 The stepped insulating member 18 and the stepped metal member 19 of the second embodiment may be used in a mounting mode in which the direction of gravity is parallel to the axial force as shown in FIG.
　なお、本発明は上記した実施の形態に限定されるものではなく、様々な変形例が含まれる。例えば、上記した実施の形態は本発明を分かりやすく説明するために詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。また、ある実施の形態における構成の一部を他の実施の形態の構成に置き換えることが可能であり、また、ある実施の形態の構成に他の実施の形態の構成を加えることも可能である。また、各実施の形態における構成の一部について、他の構成の追加・削除・置換をすることも可能である。 The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to replace a part of the configuration in one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. .. Further, it is also possible to add / delete / replace a part of the configuration in each embodiment with another configuration.
１　鉄道車両用電力変換装置
２　筐体
２ａ　ねじ穴
３　筐体開口部
４　絶縁板
５　熱交換器
５ａ　フランジ部
５ｂ　ボルト穴
５ｃ　段差面
６　段付き絶縁部材（重力方向締結用）
６ａ　絶縁中空円筒部材
６ｂ　内側段付き部
７　段付き金属部材（重力方向締結用）
７ａ　金属中空円筒部材
７ｂ　外側段付き部
８　締結ボルト
９　パワーモジュール
１０　フィルタコンデンサ
１１　ラミネートブスバー
１２　パワーユニット
１３　ノイズ低減抵抗
１４　接地配線
１５　接地配線集約箇所
１８　段付き絶縁部材（水平方向締結用）
１８ａ　絶縁中空円筒部材
１８ｂ　内側段付き部
１８ｃ　延出円筒部
１９　段付き金属部材（水平方向締結用）
１９ａ　金属中空円筒部材
１９ｂ　外側段付き部
Ａ　外側段付き部の外径
Ｂ　ボルト穴の穴径
Ｇ　重力の方向を示す矢印 1 Power converter for rolling stock 2 Housing 2a Screw hole 3 Housing opening 4 Insulation plate 5 Heat exchanger 5a Flange 5b Bolt hole 5c Stepped surface 6 Stepped insulation member (for fastening in the direction of gravity)
6a Insulated hollow cylindrical member 6b Inner stepped part 7 Stepped metal member (for fastening in the direction of gravity)
7a Metal hollow cylindrical member 7b Outer stepped part 8 Fastening bolt 9 Power module 10 Filter capacitor 11 Laminated bus bar 12 Power unit 13 Noise reduction resistor 14 Ground wiring 15 Ground wiring Consolidation point 18 Stepped insulation member (for horizontal fastening)
18a Insulated hollow cylindrical member 18b Inner stepped part 18c Extended cylindrical part 19 Stepped metal member (for horizontal fastening)
19a Metal hollow cylindrical member 19b Outer stepped part A Outer diameter of outer stepped part B Hole diameter of bolt hole G Arrow indicating the direction of gravity

Claims (7)

  1. 　導電性素材から形成された筐体と、パワーモジュールと、前記パワーモジュールを実装した導電性素材から形成された熱交換器とを有する鉄道車両用電力変換装置であって、
    　前記筐体に設けた筐体開口部の外部周囲を囲うように絶縁板が配置され、前記パワーモジュールを前記筐体内に配置した状態で、前記絶縁板を介在させて前記筐体と前記熱交換器とが締結された、
    ことを特徴とする鉄道車両用電力変換装置。     A power conversion device for railway vehicles having a housing formed of a conductive material, a power module, and a heat exchanger formed of the conductive material on which the power module is mounted.
    An insulating plate is arranged so as to surround the outer periphery of the housing opening provided in the housing, and in a state where the power module is arranged in the housing, the heat exchange between the housing and the housing is provided with the insulating plate interposed therebetween. The vessel was fastened,
    A power conversion device for railway vehicles, which is characterized by this.
  2. 　請求項１に記載の鉄道車両用電力変換装置において、
    　前記熱交換器のフランジ部が、前記絶縁板に密着して前記筐体と締結されており、前記筐体開口部の外形寸法は、前記フランジ部の外形寸法より小さい、
    ことを特徴とする鉄道車両用電力変換装置。     In the electric power conversion device for railway vehicles according to claim 1.
    The flange portion of the heat exchanger is in close contact with the insulating plate and fastened to the housing, and the external dimension of the housing opening is smaller than the external dimension of the flange portion.
    A power conversion device for railway vehicles, which is characterized by this.
  3. 　請求項１又は２に記載の鉄道車両用電力変換装置において、
    　前記熱交換器から、ノイズ低減抵抗を介して車体へと接地が行われることを特徴とする鉄道車両用電力変換装置。     In the electric power conversion device for railway vehicles according to claim 1 or 2.
    A power conversion device for railway vehicles, characterized in that the heat exchanger is grounded to the vehicle body via a noise reduction resistor.
  4. 　請求項１～３のいずれか一項に記載の鉄道車両用電力変換装置において、
    　前記筐体と前記熱交換器とは、段付き絶縁部材と段付き金属部材とを用いて締結されることを特徴とする鉄道車両用電力変換装置。     In the electric power conversion device for railway vehicles according to any one of claims 1 to 3.
    A power conversion device for a railway vehicle, characterized in that the housing and the heat exchanger are fastened by using a stepped insulating member and a stepped metal member.
  5. 　請求項４に記載の鉄道車両用電力変換装置において、
    　前記段付き絶縁部材は、内側に絶縁段付き部を形成した絶縁中空円筒部材を有し、
    　前記段付き金属部材は、前記絶縁段付き部に当接する金属段付き部を外側に形成した金属中空円筒部材を有し、
    　前記筐体と前記熱交換器とを締結する締結ボルトが、前記段付き絶縁部材と前記段付き金属部材とを貫通することを特徴とする鉄道車両用電力変換装置。     In the electric power conversion device for railway vehicles according to claim 4.
    The stepped insulating member has an insulating hollow cylindrical member having an insulating stepped portion formed inside.
    The stepped metal member has a metal hollow cylindrical member having a metal stepped portion abutting on the insulating stepped portion formed on the outside.
    A power conversion device for a railroad vehicle, characterized in that a fastening bolt that fastens the housing and the heat exchanger penetrates the stepped insulating member and the stepped metal member.
  6. 　請求項４に記載の鉄道車両用電力変換装置において、
    　前記段付き絶縁部材は、内側に絶縁段付き部を形成し、且つ前記絶縁段付き部から軸方向に突出する延出円筒部を形成した絶縁中空円筒部材を有し、
    　前記段付き金属部材は、前記絶縁段付き部に当接する金属段付き部を外側に形成し、且つ前記延出円筒部により少なくとも一部が包囲される金属中空円筒部材を有し、
    　前記筐体と前記熱交換器とを締結する締結ボルトが、前記段付き絶縁部材と前記段付き金属部材とを貫通することを特徴とする鉄道車両用電力変換装置。     In the electric power conversion device for railway vehicles according to claim 4.
    The stepped insulating member has an insulating hollow cylindrical member having an insulating stepped portion formed inside and an extending cylindrical portion extending axially from the insulating stepped portion.
    The stepped metal member has a metal hollow cylindrical member having a metal stepped portion abutting on the insulating stepped portion on the outside and at least partially surrounded by the extending cylindrical portion.
    A power conversion device for a railroad vehicle, characterized in that a fastening bolt that fastens the housing and the heat exchanger penetrates the stepped insulating member and the stepped metal member.
  7. 　請求項５または６に記載の鉄道車両用電力変換装置において、
    　前記段付き金属部材の金属段付き部の外径は、前記締結ボルトを挿通する前記熱交換器の穴径より大きいことを特徴とする鉄道車両用電力変換装置。     In the electric power conversion device for railway vehicles according to claim 5 or 6.
    A power conversion device for railroad vehicles, wherein the outer diameter of the metal stepped portion of the stepped metal member is larger than the hole diameter of the heat exchanger through which the fastening bolt is inserted.
PCT/JP2020/015365 2019-04-15 2020-04-03 Power conversion device for railway vehicle WO2020213438A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7451386B2 (en) 2020-12-08 2024-03-18 株式会社日立製作所 power converter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007013223A (en) * 2006-10-20 2007-01-18 Toshiba Corp Power converter for railway vehicle
US20190054931A1 (en) * 2016-03-08 2019-02-21 Siemens Aktiengesellschaft Rail vehicle
JP2019034689A (en) * 2017-08-21 2019-03-07 東海旅客鉄道株式会社 Power converter for high speed railway vehicle and high speed railway vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007013223A (en) * 2006-10-20 2007-01-18 Toshiba Corp Power converter for railway vehicle
US20190054931A1 (en) * 2016-03-08 2019-02-21 Siemens Aktiengesellschaft Rail vehicle
JP2019034689A (en) * 2017-08-21 2019-03-07 東海旅客鉄道株式会社 Power converter for high speed railway vehicle and high speed railway vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7451386B2 (en) 2020-12-08 2024-03-18 株式会社日立製作所 power converter

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