EP3511961B1 - Transformator für fahrzeuge - Google Patents

Transformator für fahrzeuge Download PDF

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Publication number
EP3511961B1
EP3511961B1 EP16915745.0A EP16915745A EP3511961B1 EP 3511961 B1 EP3511961 B1 EP 3511961B1 EP 16915745 A EP16915745 A EP 16915745A EP 3511961 B1 EP3511961 B1 EP 3511961B1
Authority
EP
European Patent Office
Prior art keywords
cooling pipes
tank
vehicle
transformer
vehicular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16915745.0A
Other languages
English (en)
French (fr)
Other versions
EP3511961A1 (de
EP3511961A4 (de
Inventor
Sunao Kato
Koki SHINJO
Shiki HAYAMIZU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP3511961A1 publication Critical patent/EP3511961A1/de
Publication of EP3511961A4 publication Critical patent/EP3511961A4/de
Application granted granted Critical
Publication of EP3511961B1 publication Critical patent/EP3511961B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/025—Constructional details relating to cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/085—Cooling by ambient air
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling

Definitions

  • the present invention relates to a vehicular transformer.
  • Patent Literature 1 discloses a vehicular transformer as a prior art.
  • the transformer body and the cooler are arranged side by side on the roof of a vehicle along the travelling direction of the vehicle.
  • Patent Literature 2 discloses a power device as a prior art.
  • the radiator is arranged above the main container.
  • PTL 3 states a cooling device of a transformer for vehicle is provided.
  • the device has a cooler which is connected to a transformer fitted under a floor of a vehicle and removes heat of the transformer by oil, and an oil circulation pump which circulates oil in the inside of the cooler.
  • the cooler is installed in a lower part of a vehicle near the transformer, and a fin tube with a fin attached in contact with air outside a tube wherein oil goes through is fixed in a widthwise direction of the vehicle.
  • a plurality of fin tubes are arranged at least in an advancing direction of the vehicle.
  • a conservator In a transformer in which insulating oil is circulated as refrigerant, a conservator is usually arranged above the transformer body. Thus, the transformer body and the cooler are arranged side by side along the travelling direction of the vehicle.
  • the power device described in Patent Literature 2 is configured to condense the refrigerant evaporated from the evaporator by using the radiator, and thereby is not provided with a conservator.
  • the present invention has been made in view of the above problems, and an object thereof is to provide a vehicular transformer configured to improve the cooling efficiency of refrigerant by using the travelling wind generated during the travelling of a vehicle.
  • the present invention addresses the problem to reduce the magnetic flux leaked to the outside of the transformer tank.
  • Fig. 1 is a perspective view illustrating the outer appearance of a vehicular transformer according to a first embodiment of the present disclosure being an example which is not part of the present invention.
  • Fig. 2 is a plan view of the vehicular transformer when viewed from the direction of an arrow II in Fig. 1 .
  • Fig. 3 is a front view of the vehicular transformer when viewed from the direction of an arrow III in Fig. 1 .
  • Fig. 4 is a left side view of the vehicular transformer when viewed from the direction of an arrow IV in Fig. 1 .
  • Fig. 5 is a right side view of the vehicular transformer when viewed from the direction of an arrow V in Fig. 1 .
  • a vehicular transformer 100 according to the first embodiment of the present disclosure is mounted on the roof of a vehicle. As illustrated in Figs. 1 to 5 , the vehicular transformer 100 according to the first embodiment of the present disclosure includes a tank 110, a plurality of cooling pipes 120, and a conservator 140.
  • the tank 110 is configured to house a transformer body (not shown), and is filled with insulating oil which serves as refrigerant.
  • the transformer body includes an iron core and a winding wound around the iron core.
  • the iron core and the winding are housed in the tank 110 and immersed in the insulating oil.
  • the tank 110 is connected to a pump (not shown) for circulating the insulating oil.
  • the plurality of cooling pipes 120 are arranged above the tank 110.
  • each of the plurality of cooling pipes 120 extends along a width direction 2 of the vehicle perpendicular to a travelling direction 1 of the vehicle.
  • Each of the plurality of cooling pipes 120 is cylindrical in profile.
  • Each of the plurality of cooling pipes 120 is made of a metal having high thermal conductivity such as stainless steel, copper or aluminum.
  • the plurality of cooling pipes 120 are arranged side by side in the height direction and are arranged side by side in the horizontal direction at each height. In the present embodiment, the plurality of cooling pipes 120 are arranged side by side in the travelling direction 1 of the vehicle at each height.
  • the number of the cooling pipes 120 arranged in the horizontal direction at each height is greater than the number of the cooling pipes 120 arranged in the height direction. For example, if the number of the cooling pipes 120 arranged in the horizontal direction at each height is 15 and the number of the cooling pipes 120 arranged in the height direction is 4, the total number of the plurality of cooling pipes 120 is 60.
  • each of the plurality of cooling pipes 120 is connected to a first header 130, and the other end of each of the plurality of cooling pipes 120 is connected to a second header 131.
  • Each of the plurality of cooling pipes 120 is in communication with the first header 130 and the second header 131.
  • the first header 130 and the second header 131 are spaced apart from each other in the width direction 2 of the vehicle and extend along the travelling direction 1 of the vehicle.
  • Each of the first header 130 and the second header 131 is connected to the upper surface of the tank 110 through a piping so as to be in communication with the tank 110.
  • the insulating oil in the tank 110 is circulated so as to flow through the first header 130, the plurality of cooling pipes 120 and the second header 131, and back to the tank 110. As the insulating oil flows through the plurality of cooling pipes 120, it is cooled by exchanging heat with the outside air.
  • the conservator 140 is arranged laterally to the tank 110 in alignment with the tank 110 along the travelling direction 1 of the vehicle. When viewed from the travelling direction 1 of the vehicle, the conservator 140 and the plurality of cooling pipes 120 do not overlap.
  • the conservator 140 is in communication with the tank 110.
  • the conservator 140 is provided to cope with the volume change of the insulating oil due to the temperature thereof. Specifically, when the temperature of the insulating oil in the tank 110 is raised, the insulating oil expands, and thereby, the insulating oil flows from the tank 110 into the conservator 140, and when the temperature of the insulating oil in the tank 110 is lowered, the insulating oil shrinks, and thereby, the insulating oil flows from the conservator 140 back into the tank 110.
  • the vehicular transformer 100 further includes an inclination portion which is configured to ascend obliquely toward the transformer body and extend toward the plurality of cooling pipes 120.
  • the vehicular transformer 100 includes a first inclination portion 150, a second inclination portion 151, a third inclination portion 152, and a fourth inclination portion 153.
  • the first inclination portion 150 is provided on the left side of the tank 110.
  • the second inclination portion 151 is provided on the right side of the tank 110.
  • the third inclination portion 152 is provided on the front side of the tank 110.
  • the fourth inclination portion 153 is provided on the rear side of the tank 110.
  • Each of the first inclination portion 150, the second inclination portion 151, the third inclination portion 152 and the fourth inclination portion 153 may be formed as a part of the outer wall of the tank 110 or as a different member separate from the tank 110.
  • Each of the first inclination portion 150, the second inclination portion 151, the third inclination portion 152, and the fourth inclination portion 153 is configured to guide the wind blowing against the vehicular transformer 100 to hit the plurality of cooling pipes 120.
  • the first inclination portion 150 and the second inclination portion 151 guide the wind blowing in the travelling direction 1 of the vehicle to hit the plurality of cooling pipes 120.
  • the third inclination portion 152 and the fourth inclination portion 153 guide the wind blowing in the width direction 2 of the vehicle to hit the plurality of cooling pipes 120.
  • the plurality of cooling pipes 120 are arranged above the tank 110, it is easy for the travelling wind generated during the travelling of the vehicle to hit the plurality of cooling pipes 120, which makes it possible to efficiently cool the refrigerant flowing through the plurality of cooling pipes 120.
  • the number of the cooling pipes 120 arranged in the horizontal direction at each height is greater than the number of the cooling pipes 120 arranged in the height direction, it is possible to increase the footprint of the plurality of cooling pipes 120 so as to provide the vehicular transformer 100 in a low profile.
  • the vehicular transformer 100 is provided with an inclination portion configured to guide the wind blowing against the vehicular transformer 100 to hit the plurality of cooling pipes 120, it is possible to further efficiently cool the refrigerant flowing through the plurality of cooling pipes 120.
  • the vehicular transformer according to the second embodiment of the present disclosure is different from the vehicular transformer 100 according to the first embodiment of the present disclosure mainly on the shape of each of the plurality of cooling pipes and the connection mode between the header and the tank, the description of the same components as those in the vehicular transformer 100 according to the first embodiment of the present disclosure will not be repeated.
  • Fig. 6 is a perspective view illustrating the outer appearance of a vehicular transformer 200 according to the second embodiment of the present disclosure.
  • the vehicular transformer 200 according to the second embodiment of the present disclosure includes a tank 110, a plurality of cooling pipes 220, and a conservator 140.
  • each of the plurality of cooling pipes 220 includes a first leg portion 221 and a second leg portion 223, each of which extends in the height direction, and a horizontal portion 222 which extends in the width direction 2 of the vehicle.
  • One end of the horizontal portion 222 is connected to the other end of the first leg portion 221, and the other end of the horizontal portion 222 is connected to the other end of the second leg portion 223.
  • One end of the first leg portion 221 of each of the plurality of cooling pipes 220 is connected to the first header 230, and one end of the second leg portion 223 of each of the plurality of cooling pipes 220 is connected to the second header 231.
  • Each of the plurality of cooling pipes 220 is in communication with each of the first header 230 and the second header 231.
  • the first header 230 and the second header 231 are spaced apart from each other in the width direction 2 of the vehicle, and extend along the travelling direction 1 of the vehicle.
  • Each of the first header 230 and the second header 231 is integrally formed on the upper portion of the tank 110.
  • the plurality of cooling pipes 220, the first header 230 and the second header 231 also serve as reinforcing members of the tank 110, and thereby, the rigidity of the tank 110 itself can be reduced, which makes it possible to make the tank 110 thinner and smaller. Consequently, it is possible to make the vehicular transformer 200 smaller and lighter.
  • Fig. 7 is a front view illustrating the outer appearance of a vehicular transformer 200a according to a first modification to the second embodiment of the present disclosure being an example which is not part of the present invention.
  • the height of the first leg portion 221 and the height of the second leg portion 223 of the plurality of cooling pipes 220 are configured to increase gradually toward one side of the travelling direction 1 of the vehicle.
  • Fig. 8 is a front view illustrating the outer appearance of a vehicular transformer 200b according to a second modification to the second embodiment of the present disclosure being an example which is not part of the present invention.
  • the height of the first leg portion 221 and the height of the second leg portion 223 of the plurality of cooling pipes 220 are configured to decrease gradually to a certain height and then increase gradually to the original height toward one side of the travelling direction 1 of the vehicle.
  • the wind blowing toward one side in the travelling direction 1 of the vehicle first hits the first cooling pipe arranged on the other side in the travelling direction 1 of the vehicle, and thereby, a vortex is formed around the first cooling pipe hit by the wind. Due to the vortex, the wind which hits the first cooling pipe arranged on the other side is guided toward one side in the travelling direction 1 of the vehicle while being subjected to a downward force so as to hit the second cooling pipe from the other side. A vortex is also formed around the second cooling pipe from the other side, and thereby, the wind which hits the second cooling pipe from the other side is guided toward one side in the travelling direction 1 of the vehicle while being subjected to a downward force so as to hit the third cooling pipe from the other side.
  • the wind blowing toward one side in the travelling direction 1 of the vehicle forms a vortex around each cooling pipe so as to pass through the plurality of cooling pipes 220 descending sequentially as illustrated by the dotted line in Fig. 8 .
  • the wind blowing toward one side in the travelling direction 1 of the vehicle smoothly passes through the plurality of cooling pipes 220, which makes it possible to improve the cooling efficiency.
  • the wind blowing toward the other side in the travelling direction 1 of the vehicle first hits the first cooling pipe arranged at one side in the travelling direction 1 of the vehicle, and thereby, a vortex is formed around the first cooling pipe hit by the wind. Due to the vortex, the wind which hits the first cooling pipe arranged on one side is guided toward the other side in the travelling direction 1 of the vehicle while being subjected to a downward force so as to hit the second cooling pipe from one side. A vortex is also formed around the second cooling pipe from one side and the wind which hits the second cooling pipe from one side is subjected to a downward force and the wind on the other side in the travelling direction 1 of the vehicle and hits the third cooling pipe from one side.
  • the wind blowing toward the other side in the travelling direction 1 of the vehicle forms a vortex around each cooling pipe so as to pass through the plurality of cooling pipes 220 descending sequentially as illustrated by the dotted line in Fig. 8 .
  • the wind blowing toward the other side in the travelling direction 1 of the vehicle smoothly passes through the plurality of cooling pipes 220, which makes it possible to improve the cooling efficiency.
  • the vehicular transformer 200b since the wind blowing toward either side of the travelling direction 1 of the vehicle efficiently hits the plurality of cooling pipes 220, it is possible to improve the cooling efficiency of the refrigerant.
  • Fig. 9 is a plan view illustrating the outer appearance of a vehicular transformer 200c according to a third modification to the second embodiment of the present disclosure being an example which is not part of the present invention.
  • the positions of the plurality of cooling pipes 220 in the width direction 2 of the vehicle are shifted to one side of the width direction 2 of the vehicle as the plurality of cooling pipes approach to one side of the travelling direction 1 of the vehicle.
  • Fig. 10 is a plan view illustrating a tank and a plurality of cooling pipes of a vehicular transformer 200d according to a fourth modification to the second embodiment of the present disclosure being an embodiment of the present invention when viewed from the top.
  • Fig. 11 is a cross-sectional view illustrating a part of the plurality of cooling pipes illustrated in Fig. 10 when viewed from the direction of an arrow line XI-XI.
  • each of the plurality of cooling pipes 220 is a flat pipe, and the plurality of cooling pipes 220 cover the tank 110 when viewed from above the tank 110.
  • each of the horizontal portions 222 of the plurality of cooling pipes 220 the flat pipes are arranged such that the flat surfaces are orthogonal to the height direction.
  • the plurality of cooling pipes 220 are arranged in a staggered manner when viewed from the extending direction of the horizontal portion 222.
  • the plurality of cooling pipes 220 are arranged with no gap in the travelling direction 1 of the vehicle.
  • the plurality of cooling pipes 220 cover the entire surface of the tank 110 when viewed from above the tank 110.
  • the magnetic flux leaked from the transformer body may be shielded by the plurality of cooling pipes 220.
  • the vehicular transformer according to the third embodiment of the present disclosure is different from the vehicular transformer 200 according to the second embodiment of the present disclosure mainly on the extending direction of the plurality of cooling pipes and the arrangement of the headers, the description of the same components as those in the vehicular transformer 200 according to the second embodiment of the present disclosure will not be repeated.
  • Fig. 12 is a perspective view illustrating the outer appearance of a vehicular transformer 300 according to the third embodiment of the present disclosure.
  • the vehicular transformer 300 according to the third embodiment of the present disclosure includes a tank 110, a plurality of cooling pipes 320, and a conservator 140.
  • each of the plurality of cooling pipes 320 includes a first leg portion 321 and a second leg portion 323, each of which extends in the height direction, and a horizontal portion 322 which extends in the travelling direction 1 of the vehicle.
  • One end of the horizontal portion 322 is connected to the other end of the first leg portion 321, and the other end of the horizontal portion 322 is connected to the other end of the second leg portion 323.
  • One end of the first leg portion 321 of each of the plurality of cooling pipes 320 is connected to the first header 330, and one end of the second leg portion 323 of each of the plurality of cooling pipes 320 is connected to the second header 331.
  • Each of the plurality of cooling pipes 320 is in communication with each of the first header 330 and the second header 331.
  • the first header 330 and the second header 331 are spaced apart from each other in the travelling direction 1 of the vehicle, and extend along the width direction 2 of the vehicle.
  • Each of the first header 330 and the second header 331 is integrally formed on the upper portion of the tank 110.
  • the plurality of cooling pipes 320, the first header 330 and the second header 331 also serve as reinforcing members of the tank 110, and thereby, the rigidity of the tank 110 itself can be reduced, which makes it possible to make the tank 110 thinner and smaller. Consequently, it is possible to make the vehicular transformer 300 smaller and lighter.
  • each of the plurality of cooling pipes 320 extends along the travelling direction 1 of the vehicle, the travelling wind generated during the travelling of the vehicle equivalently hits each of the plurality of cooling pipes 320, it is possible to efficiently cool the refrigerant flowing through the cooling pipe 320.
  • 1 traveling direction of vehicle; 2: width direction of vehicle; 100, 200, 200a, 200b, 200c, 200d, 300: vehicular transformer; 110: tank; 120, 220, 320: cooling pipe; 130, 230, 330: first header; 131, 231, 331: second header; 140: conservator; 150: first inclination portion; 151: second inclination portion; 152: third inclination portion; 153: fourth inclination portion; 221, 321: first leg portion; 222, 322: horizontal portion; 223, 323: second leg portion

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformer Cooling (AREA)

Claims (3)

  1. Fahrzeugtransformator, der angepasst ist, an einem Dach eines Fahrzeugs montiert zu werden, aufweisend:
    einen Tank (110), der eingerichtet ist, einen Transformatorkörper aufzunehmen und der mit einem Isolieröl gefüllt ist;
    eine Vielzahl von Kühlleitungen (220), die oberhalb des Tanks (110) angeordnet sind und die eingerichtet sind, das Isolieröl zu kühlen, indem Wärme zwischen dem Isolieröl und einer Außenluft ausgetauscht wird; und
    ein Ausdehnungsgefäß (140), das seitlich zum Tank (110) in Ausrichtung mit dem Tank (110) entlang einer Fahrrichtung (1) des Fahrzeugs angeordnet ist und das eingerichtet ist, mit dem Tank (110) zu kommunizieren,
    wobei die Vielzahl von Kühlleitungen (220) in einer versetzten Weise angeordnet sind, so dass die gesamte Oberfläche des Tanks (110) abdeckt ist, wenn man von oben auf den Tank (110) schaut,
    wobei jede der Vielzahl von Kühlleitungen (220) eine flache Leitung ist, und
    wobei die flachen Leitungen derart angeordnet sind, dass die flachen Oberflächen orthogonal zu der Höhenrichtung sind.
  2. Fahrzeugtransformator nach Anspruch 1, der ferner einen Neigungsabschnitt (150, 151, 152, 153) aufweist, der eingerichtet ist, schräg in Richtung des Transformatorkörpers anzusteigen und sich in Richtung der Vielzahl von Kühlleitungen (220) zu erstrecken.
  3. Fahrzeugtransformator nach Anspruch 1 oder 2, wobei
    die Vielzahl von Kühlleitungen (220) nebeneinander in der Höhenrichtung angeordnet sind und nebeneinander in der horizontalen Richtung auf jeder Höhe angeordnet sind, und
    wobei die Anzahl von Kühlleitungen (220), die in der horizontalen Richtung auf jeder Höhe angeordnet sind, größer als die Anzahl von Kühlleitungen ist, die in der Höhenrichtung angeordnet sind.
EP16915745.0A 2016-09-12 2016-09-12 Transformator für fahrzeuge Active EP3511961B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/076776 WO2018047327A1 (ja) 2016-09-12 2016-09-12 車両用変圧器

Publications (3)

Publication Number Publication Date
EP3511961A1 EP3511961A1 (de) 2019-07-17
EP3511961A4 EP3511961A4 (de) 2019-09-04
EP3511961B1 true EP3511961B1 (de) 2021-11-03

Family

ID=59012066

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16915745.0A Active EP3511961B1 (de) 2016-09-12 2016-09-12 Transformator für fahrzeuge

Country Status (4)

Country Link
EP (1) EP3511961B1 (de)
JP (1) JP6143983B1 (de)
CN (2) CN109643601A (de)
WO (1) WO2018047327A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6548859B1 (ja) * 2018-11-15 2019-07-24 三菱電機株式会社 車両用変圧器
CN110517856A (zh) * 2019-09-12 2019-11-29 中车株洲电机有限公司 一种变压器及具有该变压器的机车车辆

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JPS5660765A (en) * 1979-10-24 1981-05-25 Mitsubishi Electric Corp Cooler for electrical machinery and apparatus for car
JPS56162815A (en) * 1980-05-20 1981-12-15 Tamura Seisakusho Co Ltd Bellows device
JPS57159220U (de) * 1981-03-31 1982-10-06
JP2619707B2 (ja) * 1988-11-26 1997-06-11 三菱電機株式会社 放熱装置
JP2006269694A (ja) 2005-03-23 2006-10-05 Nissin Electric Co Ltd 電力機器
JP4012230B2 (ja) * 2006-03-22 2007-11-21 三菱電機株式会社 車載用冷却器
JP2007273777A (ja) * 2006-03-31 2007-10-18 Toshiba Corp 車両用変圧器の冷却装置
KR101024812B1 (ko) * 2006-07-10 2011-03-24 미쓰비시덴키 가부시키가이샤 차량용 변압기
CN201538317U (zh) * 2009-10-31 2010-08-04 中国北车集团大连机车研究所有限公司 顶置式冷却装置
CN201773670U (zh) * 2010-08-28 2011-03-23 中国北车集团大连机车车辆有限公司 全密封油浸牵引变压器
JP5946651B2 (ja) * 2012-02-28 2016-07-06 住友精密工業株式会社 熱交換器
CN204229989U (zh) * 2014-12-09 2015-03-25 张玮琦 机车变压器的绝缘油循环冷却装置
JP5805354B1 (ja) * 2014-12-26 2015-11-04 三菱電機株式会社 車両用変圧器
JP6494384B2 (ja) * 2015-04-09 2019-04-03 三菱電機株式会社 車両用変圧器

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Also Published As

Publication number Publication date
WO2018047327A1 (ja) 2018-03-15
CN115424825A (zh) 2022-12-02
EP3511961A1 (de) 2019-07-17
CN109643601A (zh) 2019-04-16
JP6143983B1 (ja) 2017-06-07
JPWO2018047327A1 (ja) 2018-09-06
EP3511961A4 (de) 2019-09-04

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