EP1994630A1 - Dispositif de refroidissement de moteurs electriques - Google Patents

Dispositif de refroidissement de moteurs electriques

Info

Publication number
EP1994630A1
EP1994630A1 EP07715957A EP07715957A EP1994630A1 EP 1994630 A1 EP1994630 A1 EP 1994630A1 EP 07715957 A EP07715957 A EP 07715957A EP 07715957 A EP07715957 A EP 07715957A EP 1994630 A1 EP1994630 A1 EP 1994630A1
Authority
EP
European Patent Office
Prior art keywords
cooling
stator
cooling fluid
rotor
motor
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.)
Withdrawn
Application number
EP07715957A
Other languages
German (de)
English (en)
Other versions
EP1994630A4 (fr
Inventor
Ben BOLSÖY
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.)
RAPP HYDEMA AS
Original Assignee
RAPP HYDEMA AS
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 RAPP HYDEMA AS filed Critical RAPP HYDEMA AS
Publication of EP1994630A1 publication Critical patent/EP1994630A1/fr
Publication of EP1994630A4 publication Critical patent/EP1994630A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/15—Mounting arrangements for bearing-shields or end plates

Definitions

  • the invention relates to a device as stated in the introductory part of claim 1 , for cooling of electric motors. More specifically, it relates to a device for cooling of electric motors with a tubular housing which at each end is covered by a closed cover with bearings, for receiving a rotor which is arranged within or around a stator with an interposed air gap, and wherein a cooling fluid is provided for pumping through a chamber at one end of the motor, wherein heat from the electrical components is drained to the cooling fluid, said cooling fluid being circulated through the magnetic air gap between the stator and the rotor, an outlet being arranged for withdrawing heated cooling fluid for recirculating and cooling in a cooling system.
  • the invention should be suitable both for electric motors with a stator enclosing the rotor, and motors where the rotor encloses the stator.
  • the main object of the invention is to provide a device which can increase the cooling effect without substantial costs. Particularly, it is an object to increase the heat exchanging area without substantial increase in the overall dimensions of the electric motor.
  • the cooling surfaces are configured to comprise external surfaces.
  • a particular object is to provide a motor suited for use at high ambient temperatures.
  • the invention is stated in claim 1.
  • the main feature is that at least a part of the electric motor is enclosed in a cap providing a channel for a flow of cooling fluid.
  • the invention provides an electric motor based mainly on prior art parts and still brings a substantially improved cooling.
  • the pumping of cooling fluid through the air gap between the stator and rotor occurs without undesirable braking effect up to a speed of ca. 1500 RPM.
  • the braking effect will increase exponentially. This will allow the motor according to the invention to be operated with the advantages mentioned in the most preferred range of use, i.e. at low rotation down to stagnation. Simultaneously a braking effect is achieved, which will prevent racing, e.g. by releasing from a winch.
  • An important advantage of the invention in addition to efficient cooling, is the possibility to allow cooling in different areas and modes of operation by use of the cooling channels, with alternating serial and parallel connection and interchanging the flow. This allows provision of different cooling characteristics.
  • the stator At the extremity cooling the stator is most efficient, where most heat loss is generated, with the windings as a heat sensitive part.
  • the cap At another extremity cooling the cap is most efficient. This is most of interest in a hot environment. Details are given in the Examples.
  • the invention allows for a controlled release of energy from the motor, making a utilization of the heat for practical purposes possible, avoiding loss of energy.
  • the housing of the motor is surrounded by a tubular cap providing an annular channel as stated in claim 2.
  • the main part, i.e. the rotor, stator, and a motor housing of a prior art motor be used.
  • the tubular channel may be placed serially to the air gap between the stator and rotor, as stated in claim 3, or parallel as stated in claim 4.
  • cooling fluid is pumped through the air gap between stator and rotor before being conducted through the annular channel surrounding the motor housing, as stated in claim 5. This will release the heat from the stator and the windings most efficiently. But it is also possible to pump the cooling fluid in the opposite direction, e. g. when the tubular cap is heated and is to be cooled.
  • connection to the outer part of the cooling system may be simplified.
  • At least one cover has an axial web with one or more sockets for connection to a cooling system, as stated in claim 7.
  • the Figure shows an electric motor 11 with a stator 12 accommodating a rotor 13 with a passing shaft 14.
  • the stator 12 is surrounded by a tubular cover 15 providing a motor housing.
  • the stator 12 has windings 16 in slots according to prior art.
  • the motor housing 15 is closed with a first cover 18 with a bearing 19.
  • the cover 18 has an axially outer radial mounting flange 20 for mounting to a carrying structure (not shown) and an axially inner carrying flange 21 adjoining closely the juxtaposed end of the motor housing 15. Between the mounting flange 20 and the carrying flange 21 , the cover 18 has an annular wal 22. In this wall 22, a number, e.g. four, threaded holes are distributed around the circumference, for attaching a sleeve coupling to connect to a cooling system of the kind shown in WO 2005/119883.
  • the motor housing 15 is surrounded by a tubular cap 24 providing an annular channel 25.
  • the annular cap 24 bears against the carrying flange 21 , where a carrying ring 26 is welded or provided by moulding, for holding a series of axial mounting bolts 27 extending through the carrying flange.
  • a second cover 29 with a bearing 30 is arranged, with axial bolts 31 into an annular reinforcement 32 arranged inside the tubular cap 24.
  • the covers 18 and 29 together with the motor housing 15 is a closed unit carrying the operative parts of the motor, i.e. the stator 12 and rotor 13, with the shaft 14 and the bearings 19, 30.
  • a number, e.g. four, of distributed threaded holes 33 radially in the ring 26, provides access to the annular channel 25 for connecting to a cooling system as mentioned above.
  • one of said holes will provide outlet for cooling fluid, while the rest are plugged.
  • the motor housing 15 may have a series, e.g. four, openings 34 connecting a rear motor chamber 35 with the annular channel 25.
  • the magnetic air gap 37 may have a thickness of 0,4 - 1 mm, particularly 0,5 - 0,7 mm.
  • the cooling fluid will cause braking at a rotation over ca. 1500 RPM.
  • Hydraulic oil may be used as cooling fluid.
  • the embodiment of the example may be modified by reversing the flow of cooling fluid, by changing the inlet 23 and the outlet 33. It is also possible to make both openings 23 and 33 be inlets or outlets, a further opening at the other end of the motor, e.g. at the rear cover 29, being connected to the cooling circuit. Said paths of flow will then be parallel.
  • the invention may also be used when the motor is connected to a gear with hydraulic fluid, which can be used as cooling fluid. It will be possible to connect both inlet and outlet directly to such a gear.
  • the invention may also be used with motors with an inner stator and an outer rotor, e.g. wheel motors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

Arrangement pour moteur électrique avec un logement (15) de moteur tubulaire qui à chaque extrémité est recouvert par un couvercle fermé (18, 29) avec des roulements. Le logement moteur porte un rotor (13) qui est disposé dans ou autour d'un stator (12) avec un espace (37) d'air interposé. Un fluide de refroidissement est pompé à travers une chambre (36) à une extrémité du moteur et à travers l'espace d'air (37) magnétique entre le stator et le rotor. Depuis une sortie (33) le fluide de refroidissement chauffé est retiré pour circuler et refroidir dans un système de refroidissement. Le refroidissement est amélioré si au moins une partie du moteur électrique est entourée par un chapeau (24) fournissant une conduite pour la circulation du fluide de refroidissement. Il est avantageux que le logement moteur soit entouré par un chapeau (24) tubulaire fournissant une conduite pour la circulation du fluide de refroidissement.
EP07715957.2A 2006-03-08 2007-02-26 Dispositif de refroidissement de moteurs electriques Withdrawn EP1994630A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20061131A NO20061131A (no) 2006-03-08 2006-03-08 Anordning for kjøling av elektriske motorer
PCT/NO2007/000075 WO2007102740A1 (fr) 2006-03-08 2007-02-26 Dispositif de refroidissement de moteurs electriques

Publications (2)

Publication Number Publication Date
EP1994630A1 true EP1994630A1 (fr) 2008-11-26
EP1994630A4 EP1994630A4 (fr) 2016-12-28

Family

ID=38475118

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07715957.2A Withdrawn EP1994630A4 (fr) 2006-03-08 2007-02-26 Dispositif de refroidissement de moteurs electriques

Country Status (3)

Country Link
EP (1) EP1994630A4 (fr)
NO (1) NO20061131A (fr)
WO (1) WO2007102740A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10554091B2 (en) 2014-08-22 2020-02-04 Regal Beloit America, Inc. Electric machine with rotor, stator and housing cooling passages
CN104269958A (zh) * 2014-10-11 2015-01-07 国电联合动力技术有限公司 一种潮流能发电机组冷却装置及应用其的潮流能发电机组
CN204810041U (zh) * 2015-04-01 2015-11-25 大陆汽车投资（上海）有限公司 定子外壳和用于容纳定子的装置
CN111997913B (zh) * 2020-09-02 2021-06-15 苏州贝基电子科技有限公司 一种静音型反转回压输水泵

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525001A (en) * 1968-09-23 1970-08-18 Preco Inc Liquid cooled electric motor
US3643119A (en) * 1970-11-05 1972-02-15 Gen Electric Ventilated dynamoelectric machine
US3819965A (en) * 1972-11-20 1974-06-25 Gen Electric Cooling systems especially for dry type induction regulators
JPS58117378A (ja) * 1981-12-28 1983-07-12 Mitsubishi Electric Corp スクロ−ル圧縮機
JP2001069693A (ja) * 1999-08-26 2001-03-16 Honda Motor Co Ltd 回転電機
US6727611B2 (en) * 2002-05-28 2004-04-27 Emerson Electric Co. Cooling jacket for electric machines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007102740A1 *

Also Published As

Publication number Publication date
NO324136B1 (no) 2007-09-03
NO20061131A (no) 2007-09-03
EP1994630A4 (fr) 2016-12-28
WO2007102740A1 (fr) 2007-09-13

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WO2021164946A1 (fr) Moteur électrique à système de refroidissement intégré

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