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WO2017114556A1 - Moteur électrique à dissipation thermique et assemblage amélioré - Google Patents

Moteur électrique à dissipation thermique et assemblage amélioré Download PDF

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Publication number
WO2017114556A1
WO2017114556A1 PCT/EP2015/081322 EP2015081322W WO2017114556A1 WO 2017114556 A1 WO2017114556 A1 WO 2017114556A1 EP 2015081322 W EP2015081322 W EP 2015081322W WO 2017114556 A1 WO2017114556 A1 WO 2017114556A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric motor
outer stator
cylindrical casing
cylindrical
cylindrical core
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
PCT/EP2015/081322
Other languages
English (en)
Inventor
Nezih Gokhan OZCELIK
Hakan Gedik
Burcu DURAK
Merve Ayca TELEMEZ
Evren SOYDAN
Oktay KARLI
Hasim OTUNC
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.)
Arcelik AS
Original Assignee
Arcelik 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 Arcelik AS filed Critical Arcelik AS
Priority to PCT/EP2015/081322 priority Critical patent/WO2017114556A1/fr
Priority to TR2016/16483A priority patent/TR201616483A2/tr
Publication of WO2017114556A1 publication Critical patent/WO2017114556A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators

Definitions

  • the present invention relates to the casing of the electric motor.
  • Electric motors are commonly known in the art. Electric motors can be used both in industrial applications and in domestic applications.
  • Figures 1 to 5 show an electric motor (1’) which is known from the prior art.
  • the electric motor (1’) comprises: an outer stator (2’) which includes a cylindrical core (3’) and a winding (4’) which is disposed onto the cylindrical core (3’); a shaft (not shown); an inner rotor (not shown) which is fixed to the shaft; a cylindrical casing (5’) which encloses the circumferential surface of the outer stator (2’); a front cap (not shown) and a rear cap (not shown) which cover the front aperture and the rear aperture of the cylindrical casing (5’) respectively.
  • FIGS 4 to 5 show a production process of the electric motor (1’).
  • the cylindrical casing (5’) is separately formed through die casting or injection moulding.
  • the cylindrical casing (5’) is press-fitted onto the outer stator (2’).
  • the cylindrical casing (5’) is fitted onto the outer stator (2’) through heat shrinking.
  • the cylindrical casing (5’) is directly formed onto the outer stator (2’) through Aluminum injection molding.
  • a common problem with the prior art electric motor (1’) is that the aforementioned production processes are complicated and cost intensive. Moreover the production processes are vulnerable to faults which cause a reduction in the heat dissipation and an increase in the vibration of the electric motor (1’) during the operation. For instance, in the heat shrinking process of the cylindrical casing (5’) and in the press-fitting process of the cylindrical casing (5’), the contact established between the casing (5’) and the outer stator (2’) may be poor, and thus the heat dissipation may become insufficient and also vibrations may occur during the operation.
  • the outer stator (2’) may receive deformations during due to the high temperatures about 600 to 700 degrees Celsius, and thus the gap between the outer stator (2’) and the inner rotor may not be accurately adjusted and the performance of the electric motor (1’) may decrease.
  • An objective of the present invention is to provide an electric motor which overcomes the problems of the prior art in a cost effective way and which enables an improved production and assemblage and an improved cooling performance.
  • the electric motor of the present invention comprises a screw connection which is adapted for screwing the cylindrical core of the outer stator along the axial direction into the cylindrical casing without heat treatment.
  • a major advantageous effect of the present invention is that the outer stator can be easily assembled with the cylindrical casing. Another major advantageous effect of the present invention is that the outer stator can be easily disassembled from the cylindrical casing. Another major advantageous effect of the present invention is that the contact between the cylindrical core and the cylindrical casing has been improved. Thereby, the heat can be more effectively dissipated into the environment and the motor performance can be increased. Thereby also the outer stator can be prevented from vibrating inside the cylindrical casing. Another major advantageous effect of the present invention is that the need for the heat shrinking process has been obviated. Another major advantageous effect of the present invention is that the need for the press fitting process has also been obviated. Another major advantageous effect of the present invention is that the need for reworking the gap between the outer stator and the inner rotor has been eliminated or reduced as much as possible. Thereby, the production costs can be reduced both in labor and material.
  • the screw connection comprises a helical external thread and a helical internal thread which are respectively formed into the outer surface of the cylindrical core and the inner surface of the cylindrical casing.
  • This embodiment is particularly advantageous as the outer stator and the cylindrical casing can be easily assembled with or dissembled from each other.
  • This embodiment is also particularly advantageous as the contact between the cylindrical core and the cylindrical casing can be accurately adjusted through the strength of the screw connection. Thereby, the vibrations can be effectively eliminated. Thereby also the heat can be more effectively dissipated into the environment, and the performance of the electric motor can be increased.
  • the helical external thread and the helical internal thread have matching rectangular shapes.
  • a trapezoidal thread form, a triangular thread form or a round thread form may be alternatively used.
  • Figure 1 - is a perspective view of an electric motor according to the prior art
  • Figure 2 - is a perspective view of the cylindrical casing of the electric motor in Fig. 1;
  • Figure 3 - is a perspective view of the outer stator of the electric motor in Fig. 1;
  • Figure 4 - is a perspective view of the production process of the electric motor in Fig. 1, prior to press-fitting the cylindrical casing onto the outer stator;
  • Figure 5 - is a perspective view of the production process of the electric motor in Fig. 1, after the cylindrical casing has been press-fitted onto the outer stator;
  • Figure 6 - is a perspective view of an electric motor according to an embodiment of the present invention.
  • Figures 7 to 8 - are perspective views of the production process of the electric motor in Fig. 6.
  • the electric motor (1) comprises an outer stator (2) which includes a cylindrical core (3) and a winding (4) which is disposed onto the cylindrical core (3), a shaft (not shown), an inner rotor (not shown) which is fixed to the shaft, and a cylindrical casing (5) for enclosing the circumferential surface of the outer stator (2) (Fig. 6)
  • the electric motor (1) of the present invention further comprises a screw connection (6) which is adapted for screwing the cylindrical core (3) of the outer stator (2) along the axial direction into the cylindrical casing (5) without heat treatment (Fig. 7 and Fig. 8)
  • the screw connection (6) comprises a helical external thread (7) and a helical internal thread (8) for rotatably receiving the helical external thread (7).
  • the helical external thread (7) is formed into the outer surface of the cylindrical core (3) and the helical internal thread (8) is formed into the inner surface of the cylindrical casing (3) (Fig. 7 and Fig. 8).
  • a major advantageous effect of the present invention is that the outer stator (2) can be easily assembled with or disassembled from the cylindrical casing (5).
  • Another major advantageous effect of the present invention is that the contact between the cylindrical core (3) and the cylindrical casing (5) has been improved. Thereby, the heat can be more effectively dissipated into the environment and the performance of the electric motor can be increased. Thereby also the outer stator (2) can be prevented from vibrating inside the cylindrical casing (5) during the operation.
  • Other advantageous effects of the present invention can be taken from the above described embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

La présente invention concerne un moteur électrique (1) comprenant un stator externe (2) qui contient un noyau cylindrique (3) et un enroulement (4) qui est disposé sur le noyau cylindrique (3), un arbre, un rotor interne qui est fixé à l'arbre et une enveloppe cylindrique (5) destinée à entourer la surface circonférentielle du stator externe (2). Le moteur électrique (1) selon la présente invention comprend en outre une liaison vissée (6) qui est adaptée pour visser le noyau cylindrique (3) du stator externe (2) le long de la direction axiale dans l'enveloppe cylindrique (5) sans traitement thermique.
PCT/EP2015/081322 2015-12-29 2015-12-29 Moteur électrique à dissipation thermique et assemblage amélioré Ceased WO2017114556A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2015/081322 WO2017114556A1 (fr) 2015-12-29 2015-12-29 Moteur électrique à dissipation thermique et assemblage amélioré
TR2016/16483A TR201616483A2 (tr) 2015-12-29 2016-11-15 Isi yayilimi ve montaji i̇yi̇leşti̇ri̇lmi̇ş elektri̇k motoru

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2015/081322 WO2017114556A1 (fr) 2015-12-29 2015-12-29 Moteur électrique à dissipation thermique et assemblage amélioré

Publications (1)

Publication Number Publication Date
WO2017114556A1 true WO2017114556A1 (fr) 2017-07-06

Family

ID=55066630

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/081322 Ceased WO2017114556A1 (fr) 2015-12-29 2015-12-29 Moteur électrique à dissipation thermique et assemblage amélioré

Country Status (2)

Country Link
TR (1) TR201616483A2 (fr)
WO (1) WO2017114556A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112865385A (zh) * 2021-01-22 2021-05-28 珠海格力电器股份有限公司 散热结构及电机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2014802A (en) * 1978-02-09 1979-08-30 Multimotors System Ital Case structure for rotary machines
DE102006049117A1 (de) * 2006-10-18 2008-04-24 Siemens Ag Verfahren zum Zusammenbau eines Stellmotors für ein Kraftfahrzeug und Stellmotor für ein Kraftfahrzeug
JP2014109204A (ja) * 2012-11-30 2014-06-12 Daikin Ind Ltd 圧縮機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2014802A (en) * 1978-02-09 1979-08-30 Multimotors System Ital Case structure for rotary machines
DE102006049117A1 (de) * 2006-10-18 2008-04-24 Siemens Ag Verfahren zum Zusammenbau eines Stellmotors für ein Kraftfahrzeug und Stellmotor für ein Kraftfahrzeug
JP2014109204A (ja) * 2012-11-30 2014-06-12 Daikin Ind Ltd 圧縮機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112865385A (zh) * 2021-01-22 2021-05-28 珠海格力电器股份有限公司 散热结构及电机

Also Published As

Publication number Publication date
TR201616483A2 (tr) 2017-07-21

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