EP2014144B1 - Régulateur comportant un corps de refroidissement destiné à une machine électrique - Google Patents

Régulateur comportant un corps de refroidissement destiné à une machine électrique Download PDF

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Publication number
EP2014144B1
EP2014144B1 EP07728562.5A EP07728562A EP2014144B1 EP 2014144 B1 EP2014144 B1 EP 2014144B1 EP 07728562 A EP07728562 A EP 07728562A EP 2014144 B1 EP2014144 B1 EP 2014144B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
cooling air
projections
region
exchanger surface
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.)
Ceased
Application number
EP07728562.5A
Other languages
German (de)
English (en)
Other versions
EP2014144A1 (fr
Inventor
Horst Braun
Robert Goldschmidt
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2014144A1 publication Critical patent/EP2014144A1/fr
Application granted granted Critical
Publication of EP2014144B1 publication Critical patent/EP2014144B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/022—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being wires or pins

Definitions

  • the invention relates to a controller with a heat sink for an electric machine, in particular a voltage regulator of a DC generator of a vehicle.
  • Controllers of electric machines such as the voltage regulator of a DC generator of a motor vehicle, are generally mounted in the vicinity of the electric machine, so that they must be cooled to avoid damage to heat-sensitive electronic components of the controller due to the heat generated during operation of the electric machine.
  • Currently produced by the applicant and mounted on the generator voltage regulator of motor vehicles are provided on its side facing away from the generator side with a heat sink of a good heat conducting material which is acted upon by the operation of the generator with a cooling air flow from a generator driven by the cooling air blower.
  • the cooling body has there on its upper side a plurality of substantially parallel aligned smooth cooling fins whose surfaces form a heat exchanger surface of the heat sink together with the surfaces in the spaces between the cooling fins.
  • This heat exchanger surface is aligned relative to the cooling air flow such that the cooling air is directed past the heat exchanger surface through the spaces between the cooling fins substantially parallel to the top of the heat sink.
  • boundary layers form on the surface of the heat exchanger, which affect a convective heat transfer and thus the cooling effect.
  • a semiconductor device device which is used, for example, for controlling industrial motors.
  • a heat exchanger surface is designed differently in the inflow and outflow areas.
  • the object of the invention is to provide a controller with a heat sink with an improved cooling effect.
  • a controller with a heat sink with the features mentioned in claim 1 is proposed.
  • This controller has a heat sink with the advantage of a better cooling effect and allows a constant temperature and flow velocity of the cooling air, a temperature drop inside the controller and especially in the areas with the highest temperature by several Kelvin.
  • the invention is based on the knowledge gained by simulations and experiments that the different shape and flow of the heat exchanger surfaces has a positive effect on the heat transfer between the heat exchanger surface and the cooling air flow, especially if in a preferred embodiment of the invention, the heat exchanger surface in the inflow, for example, a convex curved Top of a saddle-shaped elevation having at least two obliquely oriented to the main flow direction of the incoming cooling air deflecting surfaces.
  • the cooling air flow is deflected by the inflow surface or from the top of the elevation in the direction of the outflow region, where the heat sink is preferably provided with protruding rib-like projections, similar to known heat sinks where the cooling air can flow to an adjacent edge of the heat sink.
  • the inflow region is arranged substantially in the middle of the upper side of the heat sink provided with the heat exchanger surface, whose underside faces the regulator, while the outflow region either at least partially surrounds the inflow region or is arranged on opposite sides of the inflow region.
  • a further preferred embodiment of the invention provides that within the inflow region a plurality of individual pin-like or needle-like protrusions protruding beyond the inflow surface and / or the elevation are arranged, the surfaces of which form the heat exchanger surface together with the inflow surface or the top of the elevation in the inflow region ,
  • These pin-like or needle-like protrusions protruding beyond the inflow surface have the advantage that the incoming cooling air already flows along the peripheral surfaces of the protrusions prior to their contact with the inflow surface or the top of the elevation and thereby absorbs heat from the protrusions.
  • a particularly preferred embodiment of the invention provides that at least a portion of the pin-like or needle-like projections at a distance from each other along the saddle-shaped elevation and / or both sides of the saddle-shaped elevation is arranged, as this proved in simulations and measurements as the most favorable variant for the inflow area Has.
  • the saddle-shaped elevation preferably has a ratio of height to width of the base of approximately 0.8 to 1.2 in cross-section, while the ratio of width of the base to width of the vertex is approximately 2.0 to 4.0.
  • the pin or needle shaped projections suitably have a frusto-conically tapered shape from their root, in which the ratio of height to foot diameter is about 1.0 to 2.5, while the ratio of foot diameter to head diameter is about 1.8 to 2; 2.
  • the inflow area or the saddle-shaped elevation in the inflow area may also be empty, that is to say have no protruding projections.
  • a use of rib-like projections in the inflow region has proven to be unfavorable.
  • rib-like projections are preferred which preferably extend from the inflow area towards an adjacent edge of the heat exchanger surface and whose surfaces together with the bottom of the elongated spaces between the protrusions form the heat exchanger surface within the outflow area and due to enlargement of the Heat exchanger surface in comparison with a flat surface to improve the heat transfer in the outflow area.
  • the spaces between adjacent projections form there flow channels for the cooling air, which flows after its deflection in the inflow region along the rib-like projections, that is substantially parallel to the top of the heat sink through the outflow region to the adjacent edge of the heat exchanger surface.
  • pin-like or needle-like projections can also be provided in the outflow region, wherein these are preferably offset in the flow direction of the cooling air in the outflow region.
  • offset of the projections By an offset of the projections, a better flow around the projections is achieved and thus increases the surfaces of the projections on which the cooling air must flow when passing through the outflow region along.
  • the arrangement of the projections is suitably chosen so that the offset of the projections in two successively arranged in the flow direction of the cooling air rows of projections corresponds to half the pitch of the projections in each row, while the distance between the two adjacent rows in the flow direction expediently 0.5 to 1.5 times the center distance of transverse to the flow direction adjacent projections.
  • the pin-like or needle-shaped projections in the outflow region expediently have, like the pin-shaped or needle-shaped projections in the inflow region, a shape tapering frustoconically from their base, the ratio of height to root diameter being about 1.0 to 2.5, while the ratio of Foot diameter to head diameter is about 1.8 to 2.2.
  • heat sink 2 consisting of a material with good thermal conductivity, such as aluminum, heat sink 2 are used for attachment to a voltage regulator (not shown) of a DC generator of a vehicle in the cooling air flow K of a blower of the DC generator.
  • the in Fig. 1 shown known heat sink 2 is acted upon in the direction of the arrow K from one side with the cooling air, which comes into contact with a heat exchanger surface 4 on the upper side of the heat sink 2 in an inflow region 6 on one side of the heat exchanger surface 4 and the heat sink 2 in leaves a discharge area on the opposite side of the heat exchanger surface 4 again.
  • the cooling body 2 has a total of five smooth cooling fins 10 protruding over its upper side, which extend substantially parallel to the flow direction K of the cooling air from the inflow region 6 to the outflow region 8.
  • the in the FIGS. 2 to 6 shown heatsink 2 the general outline shape and external dimensions of those of the known heat sink 2 correspond, but unlike the known heat sink 2 is acted upon not only from the side but from above with the cooling air K, as in Fig. 2 and 3 represented, and on the other hand in the inflow region 6 and in the outflow region 8 is designed differently.
  • the supplied cooling air flow in the inflow region 6 located approximately in the middle of the heat exchanger surface is substantially perpendicular to the upper side of the heat sink 2, where the cooling air is deflected predominantly towards two opposite sides of the heat exchanger surface 4 and then substantially parallel to the upper side of the heat sink 2 flows through the outflow region 8 to the respective adjacent edge of the heat exchanger surface 4, as well as in the FIGS. 4 and 5 shown schematically.
  • the cooling body 2 in the inflow region 6 has a plurality of individual pin-like or needle-like projections 12, which protrude at a distance from one another via an inflow surface 14 of the inflow region 6 arranged between the projections.
  • the projections 12 have a frustoconical upwardly tapered shape with a rounded head, wherein the ratio of height h to foot diameter d is about 1.0 to 2.5, while the ratio of foot diameter d to head diameter do is about 1.8 to Is 2.2.
  • the elevation 16 is shaped so that in cross-section the ratio of height h to width b of its base is about 0.8 to 1.2, while the ratio of the width b of its base to the width b 0 of its vertex is about 2.0 to 4 , 0 is as in Fig. 2 shown.
  • a further definition can be made such that the elevation 16 is shaped such that the cross-section has a ratio of half height h_schreib (h / 2) to width b_schreib half height of the elevation 16 of about 1.1 to 1.5, while the ratio of width b_schreib the survey 16 at half height h_schreib to the width b 0 of its apex is about 1.4 to 1.8, the apex is where in straight flanks of the survey 16, these pass into a rounding of the crest of the survey or in curved (concave) flanks these go into a rounding of the ridge of the survey (for example, inflection point or inflection line on sides of the survey).
  • the outflow area 8 of the in the Figures 2 . 3 and 6 shown heatsink 2 consists essentially of the two spaced on both sides of the survey 16 arranged portions 8a, 8b, as shown Fig. 2 is apparent.
  • the outflow area 8 is provided with protruding projections 18 in the form of elongated cooling ribs with rounded apexes extending in a direction away from the elevation 16 away from the respective adjacent edge of the heat exchanger surface 4, wherein adjacent projections 18 may slightly diverge, so that the increase in distance towards the edge of the heat sink between the cooling fins creates a diffuser effect.
  • protruding projections 18 in the form of elongated cooling ribs with rounded apexes extending in a direction away from the elevation 16 away from the respective adjacent edge of the heat exchanger surface 4, wherein adjacent projections 18 may slightly diverge, so that the increase in distance towards the edge of the heat sink between the cooling fins creates a diffuser effect.
  • a plurality of rows of pin or needle-like projections 12 in the flow direction of the cooling air in the inflow and / or outflow are arranged one behind the other, the projections 12 in these rows at least in the outflow. 8 offset from each other transversely to the flow direction of the cooling air.
  • the offset V corresponds approximately to half the center distance T of the projections 12 of each row, while the distance a between the rows is approximately 0.5 to 1.5 times the center distance T.
  • DC generator means that a DC voltage can be measured at the current output of the generator during operation. Of course, this can also be the current output after a rectifier which has rectified an alternating or three-phase voltage.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Claims (10)

  1. Régulateur comprenant un corps de refroidissement pour une machine électrique, comprenant une surface d'échangeur de chaleur pouvant être sollicitée pendant le fonctionnement de la machine électrique par un flux d'air de refroidissement, avec une région d'afflux dans laquelle le flux d'air de refroidissement arrive sur la surface d'échangeur de chaleur et une région de sortie depuis laquelle le flux d'air de refroidissement quitte la surface d'échangeur de chaleur, la surface d'échangeur de chaleur (4) étant configurée de manière différente dans la région d'afflux (6) et dans la région de sortie (8), et pouvant être parcourue différemment par l'air de refroidissement (K), caractérisé en ce que la surface d'échangeur de chaleur (4) comprend, dans la région d'afflux (6), un côté supérieur d'un rehaussement en forme de selle (16) qui présente au moins deux surfaces de déflexion orientées obliquement par rapport à la direction d'écoulement principale de l'air de refroidissement arrivant (K) et tournées dans la direction de régions partielles adjacentes (8a, 8b) de la région de sortie (8).
  2. Régulateur selon la revendication 1, caractérisé en ce que la région d'afflux (6) est disposée essentiellement centralement sur la surface d'échangeur de chaleur (4) et en ce que la région de sortie (8) entoure au moins partiellement la région d'afflux (6) ou est disposée de part et d'autre de la région d'afflux (6).
  3. Régulateur selon la revendication 1 ou 2, caractérisé en ce que la surface d'échangeur de chaleur (4) dans la région d'afflux (6) comprend une surface d'afflux (14) essentiellement plane et orientée perpendiculairement à une direction d'écoulement principale de l'air de refroidissement (K).
  4. Régulateur selon l'une quelconque des revendications précédentes, caractérisé en ce que le rehaussement (16) en forme de selle comprend un côté supérieur de courbure convexe.
  5. Régulateur selon l'une quelconque des revendications précédentes, caractérisé par plusieurs saillies en forme de goupilles ou d'aiguilles saillantes (12) disposées à l'intérieur de la région d'afflux (6).
  6. Régulateur selon la revendication 1, 4 ou 5, caractérisé en ce qu'au moins une partie des saillies en forme de goupilles ou d'aiguilles (12) sont disposées à distance les unes des autres le long du rehaussement (16) en forme de selle et/ou de chaque côté du rehaussement (16) en forme de selle.
  7. Régulateur selon l'une quelconque des revendications précédentes, caractérisé en ce que la région d'afflux est exempte de saillies saillantes.
  8. Régulateur selon l'une quelconque des revendications 1 à 7, caractérisé par plusieurs saillies (18) en forme d'ailettes disposées à l'intérieur de la région d'afflux (8), lesquelles s'étendent depuis la région d'afflux (6) dans la direction d'un bord adjacent de la surface d'échangeur de chaleur (4).
  9. Régulateur selon l'une quelconque des revendications 1 à 8, caractérisé par plusieurs saillies en forme de goupilles ou d'aiguilles disposées à l'intérieur de la région d'afflux, décalées les unes par rapport aux autres dans la direction d'écoulement de l'air de refroidissement.
  10. Machine électrique comprenant un régulateur selon l'une quelconque des revendications 1 à 9.
EP07728562.5A 2006-04-26 2007-04-26 Régulateur comportant un corps de refroidissement destiné à une machine électrique Ceased EP2014144B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006019310A DE102006019310A1 (de) 2006-04-26 2006-04-26 Kühlkörper für den Regler einer Elektromaschine
PCT/EP2007/054107 WO2007122263A1 (fr) 2006-04-26 2007-04-26 Régulateur comportant un corps de refroidissement destiné à une machine électrique

Publications (2)

Publication Number Publication Date
EP2014144A1 EP2014144A1 (fr) 2009-01-14
EP2014144B1 true EP2014144B1 (fr) 2013-09-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07728562.5A Ceased EP2014144B1 (fr) 2006-04-26 2007-04-26 Régulateur comportant un corps de refroidissement destiné à une machine électrique

Country Status (4)

Country Link
US (1) US8371364B2 (fr)
EP (1) EP2014144B1 (fr)
DE (1) DE102006019310A1 (fr)
WO (1) WO2007122263A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011118483A1 (de) 2011-11-12 2013-05-16 Volkswagen Aktiengesellschaft Wärmeübertrager
JP6508468B2 (ja) * 2015-07-24 2019-05-08 東芝ライテック株式会社 車両用照明装置、および車両用灯具
DE102015225681A1 (de) * 2015-12-17 2017-06-22 Robert Bosch Gmbh Elektrische Vorrichtung mit einer Kühleinheit
US20210063099A1 (en) 2019-08-28 2021-03-04 Carbice Corporation Flexible and conformable polymer-based heat sinks and methods of making and using thereof
USD903610S1 (en) * 2019-08-28 2020-12-01 Carbice Corporation Flexible heat sink
USD906269S1 (en) * 2019-08-28 2020-12-29 Carbice Corporation Flexible heat sink
USD904322S1 (en) * 2019-08-28 2020-12-08 Carbice Corporation Flexible heat sink

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US2131929A (en) * 1933-04-13 1938-10-04 Amme Hermann Carl Heat exchange surface
DE9017681U1 (de) * 1990-07-17 1991-11-07 Hanning Elektro-Werke GmbH & Co. KG, Oerlinghausen, 33813 Oerlinghausen Über einen Umrichter gespeister Drehstrommotor
DE4231122C2 (de) * 1992-09-17 1997-05-22 Heinrich Ing Grad Cap Kühlkörper mit Lüfter
DE4413723C2 (de) 1994-04-20 1998-03-19 Vem Motors Gmbh Kompaktantrieb aus Motor und Steuerung
US5915463A (en) * 1996-03-23 1999-06-29 Motorola, Inc. Heat dissipation apparatus and method
DE19704226B4 (de) * 1997-02-05 2004-09-30 Sew-Eurodrive Gmbh & Co. Kg Klemmdeckelumrichter
US5912800A (en) * 1997-09-03 1999-06-15 International Business Machines Corporation Electronic packages and method to enhance the passive thermal management of electronic packages
US5873407A (en) * 1998-03-27 1999-02-23 Inventec Corporation Windblown-type heat-dissipating device for computer mother board
US6382306B1 (en) * 2000-08-15 2002-05-07 Hul Chun Hsu Geometrical streamline flow guiding and heat-dissipating structure
US6817405B2 (en) * 2002-06-03 2004-11-16 International Business Machines Corporation Apparatus having forced fluid cooling and pin-fin heat sink
US6913070B2 (en) * 2003-09-03 2005-07-05 Chin Wen Wang Planar heat pipe structure
DE102004052149B3 (de) 2004-10-26 2006-02-16 Kermi Gmbh Kühlvorrichtung für ein elektronisches Bauelement, insbesondere für einen Mikroprozessor

Also Published As

Publication number Publication date
WO2007122263A1 (fr) 2007-11-01
US20100006272A1 (en) 2010-01-14
EP2014144A1 (fr) 2009-01-14
DE102006019310A1 (de) 2007-10-31
US8371364B2 (en) 2013-02-12

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