WO2023067083A1 - Stator pour une machine électrique - Google Patents

Stator pour une machine électrique Download PDF

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Publication number
WO2023067083A1
WO2023067083A1 PCT/EP2022/079250 EP2022079250W WO2023067083A1 WO 2023067083 A1 WO2023067083 A1 WO 2023067083A1 EP 2022079250 W EP2022079250 W EP 2022079250W WO 2023067083 A1 WO2023067083 A1 WO 2023067083A1
Authority
WO
WIPO (PCT)
Prior art keywords
base body
stator
body segments
temperature control
segments
Prior art date
Application number
PCT/EP2022/079250
Other languages
German (de)
English (en)
Inventor
Jürgen Bäuerle
Michael Möller
Tobias MICKLITZ
Marcus Van Heyden
Stephan TENNER
Original Assignee
Zf Friedrichshafen 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 Zf Friedrichshafen Ag filed Critical Zf Friedrichshafen Ag
Publication of WO2023067083A1 publication Critical patent/WO2023067083A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
    • 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
    • H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
    • 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
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs

Definitions

  • the invention relates to a stator for an electrical machine, in particular an electrical machine for a motor vehicle, comprising a stator base body defining a stator space and a rotor space.
  • Stators for electrical machines for motor vehicles are known in principle from the prior art, for example electrical machines with cooling devices are known from DE 102017213662 A1, DE 10 2017 112365 A1 or from US 2019229566 A1.
  • Such electrical machines have a stator, which can be divided into a stator space and a rotor space, for example.
  • the stator slots in which the individual conductors, which are also known as "hairpins", are accommodated, are located in the stator space, while the rotor is arranged in the rotor space.
  • a so-called air gap is formed between the rotor and the stator, for example the tips of the teeth of the stator slots and the rotor rotating or rotatably mounted in the rotor chamber.
  • a can In order to separate the rotor space from the stator space, for example to insulate the rotor space from the stator space, a can can be used, for example. The can thus bears against the inside of the stator space and separates the rotor space from the stator space in the radial direction, so that there is no connection between the stator slots and the rotor space.
  • cooling devices When cooling the electrical machine, cooling devices are usually used which have a jacket around the stator, so that coolant can be conveyed between the jacket and a stator base body in order to dissipate heat from the stator base body of the electrical machine. In this case, long distances are required for the paths along which heat is dissipated, since cooling is ultimately carried out "from the outside".
  • the invention is based on the object of specifying an improved stator for an electrical machine, in which, in particular, temperature control of the electrical machine is possible in an improved manner.
  • the invention relates to a stator for an electrical machine.
  • the stator has a stator base body that can be divided into a stator space and a rotor space.
  • a rotor can be arranged in the rotor space, which can rotate relative to the stator space, for example comprising the laminated core and the stator slots.
  • the invention is based on the finding that the stator base body has at least two base body segments that can be or are arranged next to one another in the axial direction, each of which forms a partial space of the stator space and the rotor space, with at least one base body segment being located at least partially in Circumferentially extending channel section of a temperature control channel is arranged.
  • the stator base body is segmented into a number of base body segments.
  • the stator base body can have exactly two base body segments, which in this case can be referred to as halves of the stator base body.
  • the base body segments of the stator base body can have the same structure or can have different structures, for example they can have different axial extents.
  • Each of the base body segments can have, for example, a number of parts of the laminated core, for example a number of laminations.
  • the sheet metal laminations can be distributed, in particular evenly, over the base body segments.
  • stator base body In addition to the variant with exactly two base body segments, it is basically also possible to segment the stator base body into more than two base body segments.
  • the stator body has three or four body segments.
  • the base body segments are basically arranged or can be arranged next to one another in the axial direction.
  • at least two base body segments are arranged next to one another, which together form the rotor space and the stator space of the stator base body or the stator.
  • the base body segments each form the full cross section of the stator base body and can be understood, for example, as “discs” of the stator base body.
  • a channel section of a temperature control channel is arranged between the at least two base body segments and extends at least in sections in the circumferential direction.
  • a channel section can form an annular space between the at least two base body segments, which thus extends completely in the circumferential direction or is endless or closed in the circumferential direction.
  • a corresponding channel section can be arranged between each two base body segments.
  • the configuration of the stator described here offers the possibility of placing temperature control medium between at least bring in two body segments or remove them from there.
  • the temperature control medium is introduced into the channel section between the at least two base body segments, the heat distribution or heat dissipation can be improved, since the temperature control medium can be introduced in particular in the middle between the two base body segments, so that heat can escape from the center of the Stator ground stressess or between two Grund stressesegment- th, can be discharged.
  • At least one tempering channel section in particular a multiplicity of tempering channel sections, is provided in the stator base body, which at least one Tempering channel section extends at least in sections in the axial direction, in particular through at least one stator slot, through the stator base body.
  • the previously described temperature control channel can thus have at least the channel section which extends in the circumferential direction and to which, for example, the at least one temperature control channel section can be connected.
  • the channel section extending in the circumferential direction can be adjoined by a large number of temperature control channel sections, which conduct the temperature control medium from the channel section into the temperature control channel sections and thus through the stator base body in the axial direction.
  • each base body segment can have its own temperature control channel sections, which are each connected to the channel section extending in the circumferential direction.
  • the direction of flow of the temperature control medium can be opposite within the temperature control channel sections in different base body segments in relation to the common channel section. If, for example, a channel section is arranged between a first base body segment and a second base body segment and the first temperature control channel sections of the first base body segment and the second temperature control channel sections of the second base body segment are connected to the same channel section, the flow direction of the first temperature control channel sections can be opposite to the flow direction in be formed the second tempering channel sections.
  • the tempering channel sections can in particular be accommodated in the stator slots or formed therein. In particular, each stator slot can delimit the respective temperature control channel section.
  • line elements can be inserted into or formed in the stator slots, which seal and insulate the inner surfaces of the stator slots and for the temperature control medium to be guided within the line element.
  • the line element described can define the tempering channel section.
  • the inflow and outflow of the temperature control medium can be selected as desired.
  • an inlet of the at least one temperature control channel is arranged between two base body segments, in particular in the middle of the stator base body, with a The outlet of the at least one temperature control channel is arranged on the axial end regions of the at least two base body segments, or that an outlet of the at least one temperature control channel is arranged between two base body segments, in particular in the middle of the stator base body, with an inlet of the at least a temperature control channel is arranged on the axial end regions of the at least two base body segments.
  • the axial end regions of the base body segments can, for example, be end faces of the base body segments in the axial direction.
  • the inlet or outlet can be selected in the middle of the stator base body.
  • the direction of flow can therefore be reversed, after which the temperature control medium can be introduced between two base body segments, can pass through the temperature control channel sections in the axial direction and can be discharged at the axial end faces of the two base body segments, which are located in opposite directions in the axial direction .
  • a distributor structure can be arranged on at least one base body segment, in particular in the form of teeth and gaps arranged alternately in the circumferential direction and protruding in the axial direction, which are designed to distribute temperature control medium flowing through the inlet and/or outlet.
  • a channel section of the temperature control channel extending in the circumferential direction is arranged or formed between at least two base body segments.
  • the distribution structure described can be assigned to the channel section. Depending on whether the outlet or the inlet is located between the two base body segments, temperature control medium that is fed to the space between the two base body segments and thus to the channel section can be distributed by the distributor structure.
  • the distributor structure has an arrangement of teeth and gaps that alternate in the circumferential direction, with the teeth blocking the temperature control medium from flowing through, so that the temperature control medium can only flow through the gaps. This will at least partially Accumulation of the tempering achieved so that the tempering can be distributed evenly in the circumferential direction in the channel section and thus the two base body segments can be supplied evenly distributed in the circumferential direction.
  • both base body segments have a uniform formation of teeth and gaps, so that the base body segments abutting one another in the axial direction are in contact with the teeth on the teeth of the other base body segment, so that teeth meet teeth and gaps meet gaps in the axial direction.
  • the gaps thus form flow openings through which the temperature control medium can flow.
  • the flow cross section can thus be adjusted so that a defined distribution of the temperature control medium results.
  • the stator described above can also be further developed such that the at least two base body segments have at least two, in particular complementary, connecting elements, with each base body segment having at least one connecting element designed as an engagement element and one as a receiving element.
  • the connecting elements are basically intended to connect two base body segments that are to be arranged next to one another in the axial direction.
  • the engagement element of a first base body segment can engage in a receiving element of a second base body segment.
  • an engagement element of a second base body segment can engage in the receiving element of a first base body segment.
  • the receiving elements ensure that the base body segments are connected to one another and, in particular, a relative movement, for example in the circumferential direction, is prevented.
  • the connecting elements connect and thus hold the two base body segments in position, so that a defined alignment of the two base body segments relative to one another is maintained.
  • the engagement element can be designed, for example, as a pin or as a pin.
  • the receiving element can be designed, for example, as an opening or as a socket.
  • the engagement elements of at least two base body segments are identical to one another and the receiving elements of the at least two base body segments are also identical to one another.
  • the base body segments can advantageously be designed in the same way, since the engagement elements of one base body segment fit into the receiving elements of the other base body segment and vice versa.
  • each base body segment has at least one centering element, in particular designed as a step on an inner radius.
  • the centering element is provided in particular for centering two base body segments on one another, so that their alignment, in particular in the circumferential direction, can be set in a defined manner.
  • each of the base body segments that are to be coupled to one another or arranged next to one another can have such a centering element.
  • Each centering element thus forms a stop for a corresponding centering element.
  • the centering elements can be brought into contact with one another, so that when contact is established, the two base body segments are arranged centered on one another.
  • each body segment may have a step at an inner radius, which step extends in the axial direction. Two mutually corresponding or complementary centering elements can thus be brought into contact in the circumferential direction, so that the base body segments on which the centering elements are arranged can be centered.
  • the at least two connecting elements of the at least two base body segments are formed symmetrically, in particular using the same tool, and/or the at least one centering element of the at least two base body segments is formed symmetrically, in particular using the same tool. is trained. Due to the symmetrical design, in particular with the same tool, the base body segments can ultimately be manufactured in the same way or identically. For example, a first base body segment and a second base body segment can be designed identically. It is therefore sufficient for the arrangement of the first base body segment and the second base body segment to one another, one of the two Rotate the base body segments by 180° so that the two base body segments can be arranged against one another in opposite orientations in the axial direction.
  • each of the base body segments can have a receiving element and an engaging element, which are arranged at defined positions. Since the base body segments can be manufactured identically, it can be ensured when the base body segments are rotated that the connecting elements can engage in one another exactly. The same applies to the centering element.
  • the connecting elements can be arranged on each base body segment symmetrically in relation to a central axis or a central plane of the base body segment.
  • the at least two base body segments can each have a separate casing, which is in particular embodied as encapsulated.
  • the base body segments can thus be encapsulated in an overmolding process, with the encapsulation being able to form at least one functional section of the base body segments.
  • the connecting elements or centering elements described above can be parts of the encapsulation.
  • the casing can have a ring-shaped termination of the base body segments in the axial direction.
  • the casing can be used, for example, as a seal or insulation for the base body segments.
  • the stator provision can be made for the stator to have a can, in particular designed as part of the casing, to delimit the stator space from the rotor space.
  • the can can be introduced into the opening of the stator base body, for example.
  • separate cans can be used for the base body segments or a common can can be used.
  • the can can be introduced, for example, into the stator openings of the base body segments.
  • the invention further relates to an electrical machine with a stator as described above.
  • the invention also relates to a motor vehicle, comprising an electric machine with a stator as described above. All the advantages, details and features that have been described in relation to the stator can be transferred to the electric machine and the motor vehicle.
  • FIG. 1 shows a detail of a perspective sectional illustration of a stator of an electrical machine
  • FIG. 2 shows a detail of a sectional representation of a stator of an electrical machine
  • FIG. 3 shows an axial view of a stator of an electrical machine
  • FIG. 4 shows a section of the stator from FIG. 3;
  • FIG. 5 shows a section of the stator from FIGS. 3, 4;
  • FIG. 6 shows a detail of a perspective sectional illustration of a stator
  • FIG. 7 shows a detail of a perspective sectional illustration of a stator
  • FIG. 8 shows a detail of a perspective sectional illustration of a stator
  • FIG. 9 shows a detail of a perspective sectional illustration of a stator.
  • the stator 1 shows a stator 1 for an electric machine 2 shown in detail, for example an electric machine for a traction drive of a motor vehicle.
  • the stator 1 has a stator base body 3 which, in this exemplary embodiment, has two base body segments 4, 5 which are arranged on one another in the axial direction.
  • the two base body segments 4, 5 have an identical structure, but are arranged next to one another rotated by 180°.
  • the arrangement of the base body segments 4, 5 is achieved by identical base body segments 4, 5 are aligned in the axial direction and one of the two base body segments 4, 5 is rotated by 180° about an axis of rotation perpendicular to the axial direction.
  • the base body segments 4, 5 have, for example, end faces 18 which point towards one another.
  • Each of the base body segments 4, 5 delimits or defines a partial space 6, 6' of a stator space 7 and a rotor space 8 of the stator base body 3 fully extended in the circumferential direction.
  • An inlet 11 is connected to the channel section 9 , through which temperature control medium can be introduced into the channel section 9 .
  • the temperature control medium is distributed from the channel section 9 to temperature control channel sections 12, 13, which extend in the axial direction through the base body segments 4, 5 of the stator base body 3 of the stator 1.
  • the tempering channel sections 12 , 13 are accommodated or formed in stator slots 14 .
  • the stator slots 14 can, for example, accommodate guide elements that are inserted into the stator slots 14, which form accommodation areas for conductors 15, for example.
  • the base body segment 4 can have first temperature control channel sections 12 and the base body segment 5 can have second temperature control channel sections 13 .
  • the designations "first” and “second” are basically interchangeable within the scope of this description and the description can be transferred as desired.
  • temperature control medium is introduced into the channel section 9, which temperature control medium can be distributed from the space between the two base body segments 4, 5 in the axial direction through the temperature control channel sections 12, 13.
  • the flow direction of the temperature control medium in the temperature control channel sections 12 is opposite to the temperature control channel sections 13.
  • the description can be reversed in relation to the flow direction, so that the inlet 11 can also be designed as an outlet, with the flow direction being reversed accordingly.
  • a drain can be arranged at the end of the tempering channel sections 12, 13 opposite the channel section 9 be or the corresponding ends of the stator slots 14 can be coupled to a drain, for example via catch rings, which are not shown in detail.
  • the segmentation of the stator base body 3 shown allows in particular that the temperature control medium can be introduced between the two base body segments 4 , 5 or can be removed from the channel section 9 . This allows the temperature control medium to be guided in a targeted manner into the interior of the stator base body 3, so that the heat distribution or the heat dissipation can be improved.
  • a cover 16 which can enclose the base body segments 4 , 5 .
  • the casing 16 can in particular form a can 17 or seal the stator slots 14 in the radial direction.
  • the formation of a can 17 can be omitted or implemented as desired in the individual embodiments. The description can be transferred accordingly. This means in particular that in a configuration shown with a can 17 the can 17 can be omitted and in a configuration shown without a can 17 a can 17 can be realized.
  • the casing 16 shown is designed separately for the two base body segments 4, 5, i.e. the casings 16 for the individual base body segments 4, 5 are not connected to one another in one piece.
  • the casing 16 forms an annular termination 20 on the axial end faces 18, 19 of the two base body segments 4, 5, which is shown, for example, on an end face 19 in FIG.
  • the casing 16 has an arrangement of teeth 21 and gaps 22 alternating in the circumferential direction.
  • the teeth 21 form ring segments which protrude in the axial direction from the end faces 18 and extend in the circumferential direction over the width of the teeth 21 .
  • the gaps 22 are arranged between the teeth 21 .
  • the gaps 22 act as throttle elements that dam up the temperature control medium in the channel section 9 and thus bring about an even distribution of the temperature control medium in the channel section 9 .
  • each end face 18 of the base body segments 4 , 5 has corresponding teeth 21 and gaps 22 .
  • the teeth 21 and gaps 22 are part of the casing 16 that surrounds the base body segments 4 , 5 .
  • the teeth 21 protrude from the respective end faces 18 in the axial direction and are thus in contact with one another in the axial direction. In other words, the tops of the teeth 21 touch in the axial direction.
  • Temperature control medium that flows into the channel section 9 is therefore backed up at the gaps 22, so that the channel section 9 fills up as completely as possible. This has the effect, in particular, that the supply of temperature control medium into the individual temperature control channel sections 12, 13 is carried out evenly. This prevents temperature control channel sections 12, 13 from being only partially filled, so that ultimately a homogenization of the heat dissipation and the pressure distribution and distribution of the temperature control medium is achieved.
  • connecting elements 23, 24, the connecting element 23 being designed as an engaging element, for example a pin, and the connecting element 24 being designed as a receiving element, for example a socket.
  • the base body segments 4, 5 can ultimately be identical. Two base body segments 4, 5 can be arranged next to one another with their identical end faces 18 and thus joined together.
  • the connecting elements 23 , 24 are designed symmetrically, so that a connecting element 23 of a first base body segment 4 can engage in a connecting element 24 of a second base body segment 5 .
  • a connecting element 23 of a base body segment 5 can engage in a connecting element 24 of a base body segment 4 .
  • the connecting elements 23, 24 mutually engage in one another, so that the orientation of the base body segments 4, 5 relative to one another is retained.
  • Fig. 5 shows a centering element 25, which is also arranged on an end face 18, in particular on a radial inner side.
  • the two can Base body segments 4, 5 can be constructed identically, so that the centering elements 25 can rest against one another and thus allow the two base body segments 4, 5 to be centered.
  • the centering element 25 is provided, for example, as a step on the casing 16 protruding in the axial direction.

Abstract

L'invention concerne un stator (1) pour une machine électrique (2), en particulier une machine électrique (2) pour un véhicule automobile, comprenant un corps principal de stator (3) qui définit un espace de stator (7) et un espace de rotor (8), le corps principal de stator (3) comprenant au moins deux segments de corps principal (4, 5) qui peuvent être disposés ou sont disposés les uns à côté des autres dans la direction axiale et forment chacun un espace partiel (6, 6') de l'espace de stator (7) et de l'espace de rotor (8), au moins une section de canal (9) d'un canal de régulation de température (10), lequel segment de canal s'étend dans la direction périphérique au moins dans des sections, étant située entre lesdits au moins deux segments de corps principal (4, 5).
PCT/EP2022/079250 2021-10-22 2022-10-20 Stator pour une machine électrique WO2023067083A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021211919.0 2021-10-22
DE102021211919.0A DE102021211919A1 (de) 2021-10-22 2021-10-22 Stator für eine elektrische Maschine

Publications (1)

Publication Number Publication Date
WO2023067083A1 true WO2023067083A1 (fr) 2023-04-27

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ID=84358622

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/079250 WO2023067083A1 (fr) 2021-10-22 2022-10-20 Stator pour une machine électrique

Country Status (2)

Country Link
DE (1) DE102021211919A1 (fr)
WO (1) WO2023067083A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002049193A1 (fr) * 2000-12-11 2002-06-20 Mitsubishi Heavy Industries, Ltd. Structure de refroidissement pour generatrice
US20070024129A1 (en) * 2003-04-16 2007-02-01 Siemens Aktiengesellschaft Electrical machine provided with cooled metal stacks and windings of the stator rotor thereof
FR2930381A1 (fr) * 2008-04-18 2009-10-23 Leroy Somer Moteurs Machine electrique a double ventilation separee
DE102017112365A1 (de) 2017-06-06 2018-12-06 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Elektromotor-Kühlanordnung
DE102017213662A1 (de) 2017-08-07 2019-02-07 Audi Ag Vorrichtung und Verfahren zum Abführen von entstehender Wärme in Elektromotoren
US20190229566A1 (en) 2018-01-25 2019-07-25 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Electrical drive device
WO2020195792A1 (fr) * 2019-03-26 2020-10-01 株式会社荏原製作所 Moteur à stator chemisé et pompe entraînée par celui-ci, et système de moteur-fusée et fusée à carburant liquide l'utilisant
US20210211000A1 (en) * 2020-01-08 2021-07-08 Ge Energy Power Conversion Technology Limited Stator for Rotary Electric Machine and Associated Rotary Electric Machine

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Publication number Priority date Publication date Assignee Title
JP3517611B2 (ja) 1999-08-09 2004-04-12 株式会社東芝 モータのモールドコア
DE102008012680A1 (de) 2008-03-05 2009-09-17 Minebea Co., Ltd. Elektrische Maschine
DE102013109522B4 (de) 2013-09-02 2015-06-18 Rausch & Pausch Gmbh Spaltrohrmotor mit hochdruckfestem Spaltrohr
DE102014210541A1 (de) 2014-06-04 2015-12-17 Robert Bosch Gmbh Hybriderregte elektrische Maschine
DE102017101094A1 (de) 2017-01-20 2018-07-26 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Vorrichtung zur Abdichtung mehrerer Nuten eines Stators einer elektrischen Antriebsmaschine
JP2020120536A (ja) 2019-01-25 2020-08-06 本田技研工業株式会社 ステータ及び回転電機

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002049193A1 (fr) * 2000-12-11 2002-06-20 Mitsubishi Heavy Industries, Ltd. Structure de refroidissement pour generatrice
US20070024129A1 (en) * 2003-04-16 2007-02-01 Siemens Aktiengesellschaft Electrical machine provided with cooled metal stacks and windings of the stator rotor thereof
FR2930381A1 (fr) * 2008-04-18 2009-10-23 Leroy Somer Moteurs Machine electrique a double ventilation separee
DE102017112365A1 (de) 2017-06-06 2018-12-06 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Elektromotor-Kühlanordnung
DE102017213662A1 (de) 2017-08-07 2019-02-07 Audi Ag Vorrichtung und Verfahren zum Abführen von entstehender Wärme in Elektromotoren
US20190229566A1 (en) 2018-01-25 2019-07-25 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Electrical drive device
WO2020195792A1 (fr) * 2019-03-26 2020-10-01 株式会社荏原製作所 Moteur à stator chemisé et pompe entraînée par celui-ci, et système de moteur-fusée et fusée à carburant liquide l'utilisant
US20210211000A1 (en) * 2020-01-08 2021-07-08 Ge Energy Power Conversion Technology Limited Stator for Rotary Electric Machine and Associated Rotary Electric Machine

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