WO2021136593A1 - Ensemble électrique refroidi - Google Patents

Ensemble électrique refroidi Download PDF

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Publication number
WO2021136593A1
WO2021136593A1 PCT/EP2020/050033 EP2020050033W WO2021136593A1 WO 2021136593 A1 WO2021136593 A1 WO 2021136593A1 EP 2020050033 W EP2020050033 W EP 2020050033W WO 2021136593 A1 WO2021136593 A1 WO 2021136593A1
Authority
WO
WIPO (PCT)
Prior art keywords
inductor
wall
electrical assembly
cooling member
cooled electrical
Prior art date
Application number
PCT/EP2020/050033
Other languages
English (en)
Other versions
WO2021136593A8 (fr
Inventor
Gabriel Ortiz
Ralph Burkart
Ki-Bum Park
Francisco Garcia-Ferre
Jacim JACIMOVIC
Original Assignee
Abb Schweiz Ag
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 Abb Schweiz Ag filed Critical Abb Schweiz Ag
Priority to PCT/EP2020/050033 priority Critical patent/WO2021136593A1/fr
Publication of WO2021136593A1 publication Critical patent/WO2021136593A1/fr
Publication of WO2021136593A8 publication Critical patent/WO2021136593A8/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H01F17/06—Fixed inductances of the signal type  with magnetic core with core substantially closed in itself, e.g. toroid
    • 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
    • H01F27/08—Cooling; Ventilating
    • H01F27/22—Cooling by heat conduction through solid or powdered fillings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/209—Heat transfer by conduction from internal heat source to heat radiating structure

Definitions

  • the present invention relates to a cooled electrical assembly comprising an inductor.
  • Electric power converters require inductors to filter high frequency switched voltage waveforms generated by the operation of semiconductor switches. In many cases, electric power converters are required to be compact while having a housing that protects components inside the housing against at least dust. Level of protection provided by a housing of an electrical assembly is classified by the IP Code, International Protection Marking, IEC standard 60529.
  • the objects of the invention are achieved by a cooled elec trical assembly which is characterized by what is stated in the independent claim.
  • the invention is based on the idea of providing an inductor of a cooled electrical assembly with a planar first inductor surface, and positioning the planar first inductor surface parallel and adjacent to a first wall of a body part of the cooled electrical assembly such that there is a heat conductive connection be tween the first inductor surface and a first cooling member of cooling means of the cooled electrical assembly located on opposite side of the first wall than the inductor.
  • An advantage of the cooled electrical assembly of the invention is that it has efficient space utilization combined with efficient cooling.
  • Figure 1 shows a cross section of a cooled electrical assembly accord- ing to an embodiment of the invention.
  • Figure 2 shows an axonometric projection of an inductor of a cooled electrical assembly according to another embodiment of the invention.
  • Figure 1 shows a cross section of a cooled electrical assembly compris ing a body part 2, an inductor 4, an active component unit 8 and cooling means.
  • the body part 2 comprises a first wall 21 and a second wall 22, which are planar walls.
  • the first wall 21 and second wall 22 are parallel to each other, and they are located at a distance from each other.
  • the inductor 4 is a toroidal inductor, and comprises a core 406 and a coil 408 around the core 406.
  • the coil 408 comprises a plurality of coil turns.
  • the inductor 4 has an inductor axis around which the core 406 is located.
  • the induc tor axis is an imaginary axis which extends perpendicular to a closed loop formed by a centre line of the core 406.
  • the inductor is a closed-core inductor of another type.
  • the inductor 4 is located between the first wall 21 and second wall 22.
  • the inductor 4 has a first inductor surface 41 and second inductor surface 42 which are planar outer surfaces.
  • the first inductor surface 41 and second induc tor surface are parallel to each other, and they are located at a distance from each other.
  • the first inductor surface 41 is positioned parallel and adjacent to the first wall 21 of the body part 2 such that there is a heat conductive connection be tween the first inductor surface 41 and the first wall 21.
  • the second inductor sur face 42 is positioned parallel and adjacent to the second wall 22 of the body part 2 such that there is a heat conductive connection between the second inductor sur face 42 and the second wall 22.
  • the coil 408 of the inductor 4 is made from an electrically conductive material.
  • the coil 408 of the inductor 4 is made by additive manufacturing.
  • the coil of the inductor is made from sheet material and/or bar material.
  • the inductor 4 is an air-core inductor.
  • the inductor is a ferromagnetic-core inductor having a core made of a ferromag netic or ferrimagnetic material such as iron or ferrite to increase the inductance of the inductor.
  • the cooling means is electrically insulated from the coil 408 of the in ductor 4 by insulating means.
  • the cooling means comprises a first cooling mem- ber 61 and second cooling member 62 made from heat conductive material.
  • the first cooling member 61 and second cooling member 62 are heat sinks.
  • the cooling means comprises at least one cooling member which is a passive heat exchanger of another type.
  • the first cooling member 61 is located on opposite side of the first wall 21 than the inductor 4.
  • the first cooling member 61 is in heat conductive connec tion with the first wall 21 for transferring heat from the first wall 21 by means of thermal conduction.
  • conduction of heat from the first inductor surface 41 to the first cooling member 61 is denoted with arrows 115.
  • the first cooling member 61 comprises a plurality of first cooling fins 611.
  • the first cooling mem ber 61 is integrally attached to the first wall 21.
  • the first cooling fins 611 are in tegral part of the first cooling member 61.
  • the second cooling member 62 is located on opposite side of the sec ond wall 22 than the inductor 4.
  • the second cooling member 62 is in heat conduc tive connection with the second wall 22 for transferring heat from the second wall 22 by means of thermal conduction.
  • conduction of heat from the second inductor surface 42 to the second cooling member 62 is denoted with ar rows 116.
  • the second cooling member 62 comprises a plurality of second cooling fins 621.
  • the second cooling member 62 is integrally attached to the second wall 22.
  • the second cooling fins 621 are integral part of the second cooling member 62.
  • Projections of the first inductor surface 41 and first cooling member 61 partially overlap on a plane defined by the first wall 21 such that there is a heat conductive connection between the first inductor surface 41 and the first cooling member 61.
  • Projections of the second inductor surface 42 and second cooling member 62 partially overlap on a plane defined by the second wall 22 such that there is a heat conductive connection between the second inductor sur face 42 and the second cooling member 62.
  • the coil 408 covers 80 % of a surface area of the first inductor surface 41. In an alternative embodiment, the coil covers more than 80 % of a surface ar ea of the first inductor surface.
  • the insulating means comprises a first insulation layer 51 located be tween the first inductor surface 41 and the first cooling member 61, and a second insulation layer 52 located between the second inductor surface 42 and the sec ond cooling member 62.
  • the first insulation layer 51 and the second insulation layer 52 are integral parts of the inductor 4, and adapted to electrically insulate the coil 408 of the inductor 4.
  • the first wall of the body part is made from electrically insulating material, and the insulating means comprises at least a portion of the first wall.
  • the active component unit 8 is located adjacent to the first wall 21 of the body part 2. Projections of the active component unit 8 and the first cooling member 61 overlap partially on a plane defined by the first wall 21 such that there is a heat conductive connection between the active component unit 8 and the first cooling member 61.
  • conduction of heat from the active com ponent unit 8 to the first cooling member 61 is denoted with arrows 215.
  • the active component unit 8 is also located adjacent to the second wall 22 of the body part 2. Projections of the active component unit 8 and the second cooling member 62 overlap partially on a plane defined by the second wall 22 such that there is a heat conductive connection between the active component unit 8 and the second cooling member 62.
  • conduction of heat from the active component unit 8 to the second cooling member 62 is denoted with arrows 216.
  • the active component unit 8 is electrically conductively connected to the inductor 4 through terminals of the inductor 4.
  • the active component unit 8 is a semiconductor switch unit comprising a plurality of semiconductor switches.
  • the body part 2 encloses the inductor 4 and active component unit 8, and provides a high degree of protection against at least dust.
  • the body part encloses the inductor and active component unit, and provides total protection against dust ingress and protection against low pressure water jets from any direction, as required by protection class IP-65.
  • the body part does not enclose the inductor, and the sec ond wall of the body part is omitted.
  • Figure 2 shows an axonometric projection of an inductor 4’ of a cooled electrical assembly according to another embodiment of the invention.
  • a coil 408’ of the inductor 4’ has generally a form of a rectangular parallelepiped.
  • the induc tor 4’ is provided with integrated terminals 481’ and 482’ that are made by the same additive manufacturing process as the rest of the coil 408’.
  • the inductor 4’ is adapted to be used in the cooled electrical assembly of Figure 1.
  • the inductor 4’ of Figure 2 is located in a corner of a body part enclosing the inductor 4’ such that four surfaces of the inductor 4’ are positioned parallel and adjacent to walls of the body part, wherein each of the four surfaces of the inductor 4’ is heat conductively connected to a respective wall of the body part.
  • Such a position of the inductor 4’ provides good space utilization inside the body part.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

La présente invention concerne un ensemble électrique refroidi comprenant une partie corps (2) comprenant une première paroi (21), la première paroi (21) étant une paroi plane, un inducteur (4) comprenant un noyau (406) et une bobine (408) située autour du noyau (406), l'inducteur (4) étant un inducteur à noyau fermé, et ayant une première surface d'inducteur (41) qui est une surface externe, et des moyens de refroidissement comprenant un premier élément de refroidissement (61) en liaison thermoconductrice avec la première paroi (21), et située sur le côté opposé de la première paroi (21) par rapport à l'inducteur (4). La première surface d'inducteur (41) est une surface plane positionnée de manière parallèle et adjacente à la première paroi (21) de la partie corps (2) de telle sorte qu'il y a une liaison thermoconductrice entre la première surface d'inducteur (41) et le premier élément de refroidissement (61). (Figure 1)
PCT/EP2020/050033 2020-01-02 2020-01-02 Ensemble électrique refroidi WO2021136593A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2020/050033 WO2021136593A1 (fr) 2020-01-02 2020-01-02 Ensemble électrique refroidi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2020/050033 WO2021136593A1 (fr) 2020-01-02 2020-01-02 Ensemble électrique refroidi

Publications (2)

Publication Number Publication Date
WO2021136593A1 true WO2021136593A1 (fr) 2021-07-08
WO2021136593A8 WO2021136593A8 (fr) 2021-10-07

Family

ID=69143588

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/050033 WO2021136593A1 (fr) 2020-01-02 2020-01-02 Ensemble électrique refroidi

Country Status (1)

Country Link
WO (1) WO2021136593A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040257187A1 (en) * 2003-06-18 2004-12-23 Drummond Geoffrey N. Parallel core electromagnetic device
US20140266527A1 (en) * 2013-03-15 2014-09-18 Ford Global Technologies, Llc Inductor assembly support structure
WO2014141670A1 (fr) * 2013-03-14 2014-09-18 オムロンオートモーティブエレクトロニクス株式会社 Dispositif magnétique
US20140284028A1 (en) * 2013-03-22 2014-09-25 Toyota Jidosha Kabushiki Kaisha Cooler
EP3196932A1 (fr) * 2016-01-21 2017-07-26 ABB Technology Oy Ensemble électrique refroidi
US10483028B2 (en) * 2017-12-18 2019-11-19 Deere & Company Electrical assembly having cavities for coolant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040257187A1 (en) * 2003-06-18 2004-12-23 Drummond Geoffrey N. Parallel core electromagnetic device
WO2014141670A1 (fr) * 2013-03-14 2014-09-18 オムロンオートモーティブエレクトロニクス株式会社 Dispositif magnétique
US20140266527A1 (en) * 2013-03-15 2014-09-18 Ford Global Technologies, Llc Inductor assembly support structure
US20140284028A1 (en) * 2013-03-22 2014-09-25 Toyota Jidosha Kabushiki Kaisha Cooler
EP3196932A1 (fr) * 2016-01-21 2017-07-26 ABB Technology Oy Ensemble électrique refroidi
US10483028B2 (en) * 2017-12-18 2019-11-19 Deere & Company Electrical assembly having cavities for coolant

Also Published As

Publication number Publication date
WO2021136593A8 (fr) 2021-10-07

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