EP2014144A1 - Régulateur comportant un corps de refroidissement destiné à une machine électrique - Google Patents

Régulateur comportant un corps de refroidissement destiné à une machine électrique

Info

Publication number
EP2014144A1
EP2014144A1 EP07728562A EP07728562A EP2014144A1 EP 2014144 A1 EP2014144 A1 EP 2014144A1 EP 07728562 A EP07728562 A EP 07728562A EP 07728562 A EP07728562 A EP 07728562A EP 2014144 A1 EP2014144 A1 EP 2014144A1
Authority
EP
European Patent Office
Prior art keywords
cooling air
heat exchanger
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.)
Granted
Application number
EP07728562A
Other languages
German (de)
English (en)
Other versions
EP2014144B1 (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

Links

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.
  • 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 either a substantially level and perpendicular to a main flow direction of the incoming cooling air oriented inflow surface or convexly curved top of a saddle-shaped elevation comprising at least two obliquely oriented to the main flow direction of the incoming cooling air deflection 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 substantially in the middle of the with the
  • Heat exchanger surface provided top side of the heat sink arranged, the underside of which 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-like or needle-shaped projections suitably have a frusto-conically tapered shape from their base, 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 can 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 the 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.
  • 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 its base, 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 same applies to the rib-like projections when viewed in the flow direction of the air.
  • 1 shows a perspective view of a known heat sink for a voltage regulator of a DC generator of a motor vehicle
  • 2 shows a perspective view of a heat sink for the voltage regulator
  • FIG. 3 is a perspective view of a simulation of a loading of the heat sink according to the invention from FIG. 2 with cooling air;
  • FIG. 4 shows a simplified schematic top view of the heat sink with a representation of the inflow and outflow region
  • Fig. 5 is a simplified schematic sectional view of the heat sink taken along the line V-V of Fig. 4;
  • Fig. 7 a schematic representation of the arrangement of pin or needle-like projections of the heat sink
  • Fig. 8 a schematic sectional view of one of the pin or needle-like projections.
  • 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 illustrated in Fig. 1 known heat sink 2 is acted upon in the direction of 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 cooling body 2 shown in Figures 2 to 6 has been developed, the general outline shape and external dimensions of those of the known heat sink 2 correspond, but unlike the known heat sink 2, not one from the side but from above with the cooling air K. is acted upon, as shown in Fig. 2 and 3, and on the other in the inflow region 6 and in the outflow area 8 is designed differently.
  • 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 d o is about 1.8 to 2.2.
  • the inflow region 6 furthermore has a saddle-shaped elevation 16 which extends in a straight line approximately parallel to the opposite shorter edges of the heat exchanger surface 4, so that the inflowing cooling air K of two oblique deflection on the opposite sides of the survey 16 predominantly in two on both sides of the survey 16 arranged portions 8a, 8b of the discharge area 8 is deflected.
  • the saddle-shaped elevation 16 thus acts as a flow divider.
  • Bump 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 b0 of its vertex is about 2.0 to 4.0 is as shown in Fig. 2.
  • 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 of the elevation 16 at half height h_sch to the width bo of its apex is about 1, 4 to 1, 8, the vertex is where in straight
  • Flanks of the survey 16 these pass into a rounding of the ridge of the survey or in curved (concave) flanks these go into a rounding of the ridge of the survey (eg inflection point or turning line on the sides of the survey).
  • About the survey 16 are three of the pen or needle-like projections 12th at equal distances from each other.
  • a row of pin-like or needle-like projections 12 is still arranged at a distance from one another along the elevation 16 within the inflow region 6.
  • the outflow region 8 of the heat sink 2 shown in FIGS. 2, 3 and 6 consists essentially of the two partial regions 8a, 8b arranged at a distance on both sides of the elevation 16, as can be seen from FIG.
  • 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 toward the edge of the heat sink between the cooling fins a
  • 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 to approximately 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.

Landscapes

  • 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)

Abstract

L'invention concerne un corps de refroidissement (2) destiné au régulateur d'une machine électrique, notamment au régulateur de tension d'un générateur à courant continu d'un véhicule. Le corps de refroidissement comporte une surface d'échangeur thermique (4) recevant un flux d'air de refroidissement (K) lors du fonctionnement de la machine électrique, présentant une zone d'arrivée (6) dans laquelle la surface d'échangeur thermique (4) reçoit le flux d'air de refroidissement (K), et une zone d'écoulement (8) à partir de laquelle le flux d'air de refroidissement quitte la surface d'échangeur thermique (4). Selon l'invention, la surface d'échangeur thermique (4) est conçue de façon différente dans la zone d'arrivée (6) et dans la zone d'écoulement (8) et l'arrivée d'air de refroidissement sur la surface d'échangeur thermique (4) est réalisée de façon différente.
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 true EP2014144A1 (fr) 2009-01-14
EP2014144B1 EP2014144B1 (fr) 2013-09-18

Family

ID=38278904

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

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Title
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Also Published As

Publication number Publication date
WO2007122263A1 (fr) 2007-11-01
US20100006272A1 (en) 2010-01-14
DE102006019310A1 (de) 2007-10-31
US8371364B2 (en) 2013-02-12
EP2014144B1 (fr) 2013-09-18

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