WO2018211087A1 - Elektrische maschine, insbesondere für ein fahrzeug - Google Patents
Elektrische maschine, insbesondere für ein fahrzeug Download PDFInfo
- Publication number
- WO2018211087A1 WO2018211087A1 PCT/EP2018/063139 EP2018063139W WO2018211087A1 WO 2018211087 A1 WO2018211087 A1 WO 2018211087A1 EP 2018063139 W EP2018063139 W EP 2018063139W WO 2018211087 A1 WO2018211087 A1 WO 2018211087A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stator
- coolant
- electrical machine
- machine according
- plastic
- Prior art date
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
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
-
- 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
- H02K1/16—Stator cores with slots for windings
-
- 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
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- 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
- H02K9/00—Arrangements for cooling or ventilating
-
- 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
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
- H02K9/227—Heat sinks
Definitions
- Electric machine in particular for a vehicle
- the invention relates to an electric machine, in particular for a vehicle, as well as a vehicle with such a machine.
- Such an electrical machine may generally be an electric motor or a generator.
- the electric machine can be designed as an external rotor or as an internal rotor.
- a generic machine for example from US 5,214,325. It comprises a housing which surrounds an interior space and which has a jacket radially surrounding the interior in a circumferential direction of the housing, axially on the one hand an axially delimiting the rear wall and axially on the other hand an axially delimiting the front side wall.
- Firmly connected to the jacket is a stator of the machine.
- a rotor of the machine is arranged, wherein a rotor shaft of the rotor is rotatably supported via a front shaft bearing on the front side wall.
- the stator of a conventional electric machine comprises stator windings which are electrically energized during operation of the machine. This creates heat that must be dissipated to avoid overheating and associated damage or even destruction of the stator.
- a cooling device for cooling the stator - in particular said stator windings.
- Such a cooling device comprises one or more cooling channels through which a coolant flows and in the vicinity of Stator windings are arranged in the stator. Heat can be removed from the stator by transferring heat from the stator windings to the coolant.
- an object of the present invention to provide an improved embodiment for an electric machine, in which this disadvantage is largely or even completely eliminated.
- an improved embodiment for an electrical machine is to be created, which is characterized by improved cooling of the stator windings of the stator.
- the basic idea of the invention is therefore to embed the stator windings of an electric machine together with a cooling channel through which cooling medium can flow for cooling the stator windings into a plastic mass of an electrically insulating plastic.
- the plastic can act as a heat transfer medium for transferring heat from the stator windings to the coolant on the one hand and as an electrical insulator for the stator windings on the other hand.
- a particularly good heat transfer between the stator windings and the guided through the cooling channel coolant is produced.
- a plastic which has a high thermal conductivity.
- thermosetting plastics are suitable.
- the direct thermal coupling of the cooling channel with the coolant to the stator windings to be cooled by means of the invention essential embedding of these two components in a plastic plastic material leads to a comparison with conventional cooling devices particularly effective cooling of the stator windings.
- the preparation of the plastic mass essential to the invention can preferably be carried out by means of injection molding, in which the stator windings to be cooled as well as the cooling channel for molding the plastic compound are encapsulated with the plastic.
- the embedding of the stator windings and the cooling channel in the plastic material is therefore very simple. This results in considerable cost advantages in the production of the electric machine according to the invention.
- An electric machine in particular for a vehicle, comprises a rotor which is rotatable about an axis of rotation. By the rotation axis, an axial direction of the electric machine is defined.
- the machine also includes a stator having a plurality of stator windings.
- the machine also includes a coolant distribution space and an axially spaced-apart coolant storage space.
- the coolant distributor chamber communicates fluidically with the coolant collector chamber by means of at least one cooling channel through which a coolant can flow.
- a plurality of between the coolant distribution chamber and the coolant collecting space provided such cooling channels.
- the at least one stator winding for thermal coupling to the coolant is at least partially embedded in a plastic mass of an electrically insulating plastic.
- the stator may be annular in a cross-section perpendicular to the axial direction and has stator teeth extending along the axial direction and spaced from each other along a circumferential direction of the stator, which support the stator windings.
- the plastic compound is arranged with the at least one stator winding in a gap, which is formed between two stator teeth adjacent in the circumferential direction. This measure ensures a particularly effective heat transfer between the stator windings and the cooling channel.
- the space between the stator teeth can be used in the production of the plastic material in the manner of a mold, in which the plastic of the plastic compound is injected. This simplifies the production of the plastic compound since the provision of a separate casting mold can be dispensed with.
- At least one cooling channel is arranged in the stator body and is formed by at least one opening through which the coolant can flow.
- Said breakthrough can be realized in the form of a through hole, which is introduced by means of a suitable drilling tool in the course of the production of the electric machine in the stator body.
- the provision of a separate tubular body or similar to limit the cooling channel is omitted in this variant. This is accompanied by reduced production costs.
- Particularly preferred are several such breakthroughs are provided.
- the provision of a separate tubular body or similar to limit the Cooling channel is omitted in this variant. This is accompanied by reduced production costs.
- Said breakthrough can be realized in the form of a through hole, which is introduced by means of a suitable drilling tool in the plastic compound.
- the provision of a separate tubular body or similar to limit the cooling channel is omitted in this variant. This is accompanied by reduced production costs.
- the at least one cooling channel in the stator body is expediently arranged with respect to the circumferential direction in the region between two adjacent stator teeth. This makes it possible to arrange the cooling passage close to the stator windings to be cooled, which improves the heat transfer from the stator windings to the cooling passage.
- At least one cooling channel is arranged in the plastic compound. This measure ensures a particularly effective heat transfer between the stator windings and the cooling channel, since the cooling channel arranged in the intermediate space is in the immediate vicinity of the cooling stator windings.
- the cooling channel preferably completely, is limited by the plastic mass.
- the at least one cooling channel is formed by at least one breakthrough / m apertures, preferably through a plurality, provided in the plastics material and permeable by the coolant. This variant is particularly easy to implement and therefore particularly cost-effective.
- At least one breakthrough in a cross section perpendicular to the axial direction may have the geometry of a rectangle with two broad sides and two narrow sides.
- the breakthrough is the advantageous Geometry of a flat tube lent, which in turn allows a space-saving arrangement of the cooling channel in the immediate vicinity of the stator winding (s) to be cooled.
- the opening forming the cooling channel is open towards the intermediate space.
- said breakthrough is fluid-tightly sealed by the plastic material arranged in the intermediate space.
- the breakthroughs are particularly easy to manufacture, which is associated with cost advantages in the production.
- the coolant distributor space and / or the coolant collector space for thermal coupling to the at least one stator winding are arranged at least partially in the plastic mass and also bounded by the same. This allows a particularly good heat transfer between the coolant distributor chamber or coolant collector chamber and the stator windings, so that the coolant distributor chamber or coolant collector chamber can also be used for direct absorption of waste heat from the stator windings.
- the plastic compound protrudes axially, preferably on both sides, out of the intermediate space.
- the plastic material can also be used to at least partially limit the coolant distribution chamber or the coolant collector space.
- a required in the course of the manufacture of the machine removal of outstanding from the gap plastic mass can be omitted, which is associated with cost advantages in the manufacture of the machine.
- a further advantageous embodiment therefore proposes that the at least one plastic mass at least partially limits the coolant distributor space and / or the coolant collector space.
- the plastic mass arranged in the intermediate space consists of a single plastic material.
- an additional electrical insulation made of an electrically insulating material is arranged in the intermediate space, preferably between the stator winding or plastic compound and the stator tooth. Since in this embodiment, only a single plastic material must be introduced into the interstices, the production of the plastic material from this plastic can be carried out in a single injection molding step. The production of the plastic material is therefore particularly simple, which involves cost advantages.
- the plastic mass substantially completely fills the intermediate space.
- undesirable gaps such as in the form of air gaps, which would lead to a reduction of the heat transfer, avoided.
- the electrically insulating plastic of the plastic mass comprises a thermoset or is a thermosetting plastic.
- the electrically insulating plastic of the plastic mass may comprise a thermoplastic or be a thermoplastic.
- a combination of a thermoset and a thermoplastic is conceivable in a further variant.
- Statorzähnen be provided in each case at least one cooling channel and the plastic mass. In this way it is ensured that operatively generated waste heat can be dissipated from all existing stator windings.
- a preferred embodiment proposes to form the at least one cooling channel as a tubular body which surrounds a tubular body interior.
- at least one separating element is formed on the tubular body, which subdivides the tubular body interior into at least two fluid cooling channels which are separated from one another by fluid.
- An advantageous development proposes to form the tubular body as a flat tube, which extends along the axial direction and has two broad sides and two narrow sides in a cross section perpendicular to the axial direction.
- a length of the two broad sides may preferably be at least four times, preferably at least ten times, a length of the two narrow sides.
- at least one broad side of the flat tube extends substantially perpendicular to the radial direction.
- the coolant distributor chamber and / or the coolant collector chamber are formed by a cavity which is present at least partially, preferably completely, in the plastics material.
- the plastic compound is an injection molding compound made of an electrically insulating plastic.
- the plastic compound of the electrically insulating plastic is also arranged on an outer circumferential side of the stator body and preferably forms a plastic coating on this outer peripheral side.
- the stator can be electrically isolated from the environment.
- the provision of a separate housing for receiving the stator body can thus be omitted.
- a coating of at least one or both end sides of the stator body with the plastic compound is also conceivable in an optional variant.
- the plastic compound can envelop the stator body, preferably completely.
- the plastic mass at least partially surrounds at least one winding section of the stator winding projecting axially from the space between the stator body and partially delimits the coolant distributor space and / or the coolant collector space, so that the winding section is electrically insulated from the coolant. An undesired electrical short circuit of the coolant with the stator winding during operation of the electric machine is prevented in this way.
- the coolant distribution chamber communicates by means of a plurality of cooling channels fluidly with the coolant distribution chamber.
- the plurality of cooling channels extend, spaced from each other, along the axial direction. This measure ensures that all axial sections of the stator windings are cooled.
- the cooling channels are arranged along a circumferential direction of the stator at a distance from each other. This measure ensures that all the stator windings are cooled along the circumferential direction.
- the coolant distributor space and / or coolant collector space is arranged exclusively in an axial extension of the stator body adjacent thereto.
- the coolant distributor chamber or the coolant collector chamber does not project beyond this along a radial direction of the stator body or stator. This embodiment requires only very little installation space in the radial direction.
- At least one stator winding is particularly preferably designed such that it is electrically isolated from the coolant and the stator body at least in the area within the respective intermediate space during operation of the electrical machine. This is especially preferred for all stator windings of the electrical machine. An undesired electrical short circuit of the stator winding with the stator body or - in the operation of the electric machine - with the coolant is prevented in this way.
- This electrical insulation of the at least one stator winding from the stator body, preferably also from the stator teeth bounding the gap, is particularly expediently formed completely by the plastic compound and / or by the additional insulator mentioned above.
- the provision of a further electrical insulator can be omitted in this way.
- the additional electrical insulation extends within the gap over the entire length of the gap measured along the axial direction, so that they Stator winding isolated from the stator and the space limiting stator teeth.
- the additional electrical insulation encloses the stator winding within the intermediate space over at least the entire length of the intermediate space along its circumference.
- the at least one stator winding is also electrically insulated from the cooling channel formed as a tubular body.
- the electrical insulation is formed by the plastic material and / or the additional insulation.
- stator windings are part of a distributed winding.
- the invention further relates to a vehicle, in particular a motor vehicle with a previously presented electric machine.
- a vehicle in particular a motor vehicle with a previously presented electric machine.
- FIG. 1 shows an example of an electrical machine according to the invention in a longitudinal section along the axis of rotation of the rotor
- FIG. 2 shows the stator of the electric machine according to FIG. 1 in a cross section perpendicular to the axis of rotation of the rotor
- FIG. 3 shows a detail of the stator of FIG. 2 in the region of a gap between two stator teeth which are adjacent in the circumferential direction
- FIGS. 4-6 variants of the embodiment of FIG. 3,
- FIG. 7 shows a first variant of the electric machine of FIG. 1, in which the coolant flowing through the cooling channels is also used to cool the shaft bearings of the rotor,
- FIG. 8 shows a second variant of the electric machine according to FIG. 1, which requires very little installation space
- Fig. 9 shows a third variant of the machine according to Figure 1, which allows a particularly effective cooling of the stator windings.
- FIG. 1 illustrates an example of an electrical machine 1 according to the invention in a sectional representation.
- the electric machine 1 is dimensioned such that it can be used in a vehicle, preferably in a road vehicle.
- the electric machine 1 comprises a rotor 3, which is shown only roughly in FIG. 1, and a stator 2.
- the stator 2 in FIG. 2 is shown in a section perpendicular to the axis of rotation D along the section line II-II of FIG shown.
- the rotor 3 has a rotor shaft 31 and can have a plurality of magnets (not shown in detail in FIG. 1) whose magnetic polarization alternates along the circumferential direction U.
- the rotor 3 is rotatable about a rotation axis D whose position is determined by the central longitudinal axis M of the rotor shaft 31.
- an axial direction A is defined, which extends parallel to the rotation axis D.
- a radial direction R is perpendicular to the axial direction A.
- a circumferential direction U rotates about the rotation axis D.
- the rotor 3 is arranged in the stator 2.
- the electrical machine 1 shown here is a so-called internal rotor. It is also conceivable, however, a realization as a so-called external rotor, in which the rotor 3 is arranged outside of the stator 2.
- the rotor shaft 31 is rotatably mounted on the stator 2 in a first shaft bearing 32a and, axially spaced therefrom, in a second shaft bearing 32b about the rotation axis D.
- the stator 2 also comprises, in a known manner, a plurality of stator windings 6 which can be electrically energized to produce a magnetic field. Magnetic interaction of the magnetic field generated by the magnets of the rotor 3 with the magnetic field generated by the stator windings 6 causes the rotor 3 to rotate.
- the stator 2 may have an annular stator body 7, for example made of iron.
- the stator body 7 may be formed from a plurality of stator body plates (not shown) stacked on each other along the axial direction A and bonded together be.
- a plurality of stator teeth 8 are formed radially inwardly extending along the axial direction A, projecting radially inwardly away from the stator 7 and spaced along the circumferential direction U are arranged to each other.
- Each stator tooth 8 carries a respective stator winding 6.
- the individual stator windings 6 together form a stator winding arrangement.
- the individual stator windings 6 of the entire stator winding assembly may be electrically wired together as appropriate.
- the electrically energized stator windings 6 generate waste heat which has to be dissipated from the machine 1 in order to prevent overheating of the stator 2 and a concomitant damage or even destruction of the machine 1. Therefore, the stator windings 6 are cooled by means of a coolant K which is passed through the stator 2 and can absorb the heat generated by the stator windings 6 by heat transfer.
- the machine 1 comprises a coolant distributor chamber 4, in which the coolant K can be introduced via a coolant inlet 33.
- a coolant collecting chamber 5 is arranged.
- the coolant distributor chamber 4 communicates fluidly with the coolant collector chamber 5 by means of a plurality of cooling channels 10, of which only one can be seen in the representation of FIG each have an annular geometry.
- a plurality of cooling channels 10 are arranged spaced from each other, each extending along the axial direction A.
- the coolant introduced into the coolant distributor chamber 4 via the coolant inlet 33 can be distributed to the individual cooling channels 10.
- the coolant K can be collected in the coolant accumulator chamber 5 and discharged from the machine 1 via a coolant outlet 34 provided on the stator 2.
- stator windings 6 are arranged in intermediate spaces 9 which are formed between two respective stator teeth 8 adjacent in the circumferential direction U.
- Said interspaces 9 are also known to those skilled in the art as so-called “stator slots” or “stator slots” which, like the stator teeth 8, extend along the axial direction A.
- FIG. 3 shows a gap 9 formed between two stator teeth 8 adjacent in the circumferential direction U-also referred to below as stator teeth 8a, 8b-in a detailed representation.
- a plastic compound 11 of an electrically insulating plastic is provided in each of the spaces 9 according to FIG.
- the plastic compound 1 1 is an injection molding compound made of an electrically insulating plastic. The use of an injection molding process simplifies and accelerates the production of the plastic compound.
- the plastic material 1 1 which may for example consist of a thermosetting plastics or thermoplastics or may comprise a thermoset or thermosets, the arranged in the gap 9 cooling channel 10 and arranged in the same space 9 stator windings 6 are embedded.
- a plastic material 1 1 is provided from a single plastic material in the space 9. It will be appreciated that the stator winding 6 arranged in the intermediate space 9 according to FIG. 3 is in each case partially associated with a first stator winding 6a, which is carried by a first stator tooth 8a and is partially associated with a second stator winding 6b which extends from a first stator tooth 8a in the circumferential direction U adjacent, second stator tooth 8b is worn.
- FIG. 3 a possible virtual separation line 12 is shown in FIG.
- the stator winding wires 13a shown at the left of the dividing line 12 in FIG. 3 belong to the stator winding 6a carried on the stator tooth 8a.
- the stator winding wires 13b shown on the right of the dividing line 12 thus belong to the stator winding 6b carried by the second stator tooth 8b.
- the cooling channel 10 formed in a respective interspace 9 is realized by a plurality of openings 40 provided in the plastic compound 11 and permeable by the coolant K.
- the apertures 40 - four such apertures 40 are shown purely by way of example in FIG. 3 - are arranged spaced apart from one another along the circumferential direction U and extend along the axial direction A in each case.
- the apertures 40 can be realized as through-holes which can be inserted into the groove by means of a suitable drilling tool Plastic compound 1 1 are introduced.
- the apertures 40 may each have the geometry of a rectangle with two broad sides 20 and two narrow sides 21 in the cross section perpendicular to the axis of rotation D. A length of the two broad sides 20 is at least twice, preferably at least four times, a length of the two narrow sides 21st
- the advantageous geometry of a flat tube is modeled.
- an additional electrical insulation 15 made of an electrically insulating material is provided in the respective intermediate space 9 between the plastic compound 11 and the stator body 7 or the two stator teeth 8 delimiting the intermediate space 9 in the circumferential direction U. arranged.
- Particularly cost-effective proves an electrical insulation 15 made of paper.
- the openings 40 forming the cooling channel 10 are arranged radially outside the stator windings 6 with respect to the radial direction R in the plastic compound 11.
- the radial distance of the cooling channel 10 to the axis of rotation D of the rotor 3 is thus greater than the distance of the stator winding 6 to the rotation axis D.
- the two broad sides 20 of the apertures 40 each extend perpendicular to the radial Direction R.
- the stator windings 6 are introduced into the interstices 9 and with the plastic compound 1 1 resulting plastic, for example, a thermoset, encapsulated.
- the cooling channel 10 forming openings 40 are introduced by means of a suitable drilling tool in the plastic mass 1 1.
- the stator body 7 can also be extrusion-coated with the plastic which results in the plastic compound 11, that is to say in particular with the thermosetting plastic.
- FIG. 4 shows a variant of the example of FIG. 3.
- the cooling channel 10 is not arranged in the plastic compound 11 but in the stator body 7 of the stator 2.
- the openings 40 forming the cooling channel 10 are located radially outside the intermediate space 9 and with respect to the circumferential direction U between two adjacent stator teeth 8a, 8b arranged in the stator 7.
- the cooling channel 10 is formed by openings 40 which are provided in the stator body 7.
- the cooling channel 10 can thus in the course of the production of the stator 7 by introducing the openings 40 - preferably in the form of holes using a suitable drilling tool - in the stator body 7 and in the stator body 7 forming stator body plates - are formed.
- FIG. 5 shows a variant of the example of FIG. 4. Also in the variant according to FIG. 5, the openings 40 forming the cooling channel 10 are arranged in the stator body 7 of the stator 2. In the example of FIG. 5, the apertures 40 arranged in the stator body 7 are open towards the intermediate space 9. As can be seen from FIG. 5, the apertures 40 are closed in a fluid-tight manner towards the intermediate space 9 and from the plastic compound 11 provided in the intermediate space 9.
- FIG. 6 shows a development of the example of FIG. 5.
- a cooling channel 10 is provided both in the stator body 7 and in the plastic compound 11.
- the cooling channel 10 additionally provided in the stator body 7 - hereinafter also referred to as “radially outer cooling channel” 10a - is designed in an analogous manner to, for example, FIG. 5, so that reference is made to the above explanations with regard to FIG Cooling channel 10 is referred to below as “radially inner cooling channel” 10b.
- the stator winding 6 is thus arranged between the two cooling channels 10a, 10b.
- the radially outer cooling channel 10b may be formed by a tubular body 16, for example made of aluminum, which surrounds a Rohrkorperinnenraum 22.
- one or more separating elements 18 may be formed on the tubular body 16, which may be the one or more separating elements Divide the cooling channel 10 in fluidly separate from each other part cooling channels 19.
- the tubular body 16 is additionally mechanically stiffened.
- two such separating elements 18 are shown by way of example, so that three partial cooling channels 19 result.
- the tubular body 16 may be formed as a flat tube 17, which has two broad sides 20 and two narrow sides 21 in cross section perpendicular to the axial direction A.
- a length of the two broad sides 20 in this case is at least four times, preferably at least ten times, a length of the two narrow sides 21.
- the broad sides 20 extend perpendicular to the radial direction R.
- the integrally formed plastic mass 1 1 can protrude axially on both sides of the spaces 9. This also makes it possible to embed the coolant distributor chamber 4 and, alternatively or additionally, the coolant collector chamber 5 for thermal coupling to axial end sections 14a, 14b of the stator windings 6, which are arranged axially outside the respective intermediate space 9.
- the plastic compound 1 1 limits the coolant distributor chamber 4 and the coolant collector chamber 5 at least partially. In this way, in the region of the usually thermally particularly stressed axial end sections 14a, 14b of the stator windings 6, an effective heat transfer to the cooling medium distributor chamber 4 or coolant collector chamber 5 existingdemit- tel K are produced. This measure allows particularly effective cooling of the two axial end sections 14a, 14b of the stator windings 6.
- the stator 2 with the stator body 7 and the stator teeth 8 is arranged axially between a first and a second end shield 25a, 25b.
- part of the coolant distributor chamber 4 is arranged in the first end shield 25a and a part of the coolant distributor chamber 5 is arranged in the second end shield 25b.
- the coolant distributor chamber 4 and the coolant collector chamber 5 are thus each partially formed by a cavity 41 a, 41 b provided in the plastic compound 11.
- the first cavity 41 a is supplemented by a formed in the first bearing plate 25 a cavity 42 a to the coolant distribution chamber 4.
- the second cavity 41 b is supplemented by a formed in the second bearing plate 25 b cavity 42 b to the coolant plenum 5.
- the plastic compound 1 1 thus limits the coolant distributor chamber 4 and the coolant collector chamber 5 at least partially.
- a coolant supply 35 can be formed in the first end shield 25a, which connects the coolant distribution chamber 4 fluidically with a coolant inlet 33 provided on the outside, in particular as shown in FIG. 1, on the first end shield 25a.
- a coolant outlet 36 can accordingly be formed, which fluidly connects the coolant collector chamber 5 with a coolant outlet 34 provided on the outside, in particular as shown in FIG. 1, on the bearing plate 25b.
- the plastics material 1 1 made of the electrically insulating plastic can also be arranged on an outer circumferential side 30 of the stator body 7 and thus form a plastic coating 11 1 on the outer peripheral side 30.
- the stator body 7 of the stator 2 which is typically formed of electrically conductive stator plates, can be electrically insulated from the environment. The provision of a separate housing for receiving the stator body 7 can thus be omitted.
- FIG. 7 shows a variant of the example of FIG. 1.
- the coolant supply 35 may be thermally coupled to the first shaft bearing 32a arranged in the first end shield 25a.
- the coolant discharge 36 can be thermally coupled to the second shaft bearing 32b arranged in the second end shield 25b.
- a separate cooling device for cooling the shaft bearings 32a, 32b can be omitted in this way, resulting in cost advantages.
- the coolant inlet 33 and the coolant outlet 34 are provided on the outer end face 26a, 26b of the respective end shield 25a, 25b.
- the stator windings 6 are arranged radially inside the cooling channels 10 along the radial direction R.
- the stator windings 6 are led out of the stator 2 to the outside with an electrical connection 50 through a bushing 39 provided in the second end shield 25b, so that they can be electrically energized from the outside.
- the passage 39 is arranged radially between the coolant distributor chamber 4 or the coolant collector chamber 5 and the axis of rotation D.
- FIG. 8 which shows a simplified embodiment compared to FIG. 7, the coolant distributor chamber 4 and the coolant collector chamber 5 are arranged exclusively in the axial extension of the cooling channels 10. This variant requires for the coolant distribution chamber 4 and for the coolant collecting chamber 5 very little space.
- FIG. 8 which shows a simplified embodiment compared to FIG. 7
- the stator windings 6 are arranged radially inside the cooling channels 10 along the radial direction R.
- the stator windings 6 are led out of the stator 2 with an electrical connection 50 through a bushing 39 provided in the second end shield 25b, so that they can be electrically energized from the outside.
- the bushing 39 is arranged radially outside the coolant distributor chamber 4 or the coolant collector chamber 5 in the second bearing plate 25b.
- the coolant distributor chamber 4 surrounds the first axial end section 14a of the respective stator winding 6 in a U-shape in the longitudinal section along the rotation axis D shown in FIG. 9, that is to say axially endwise and radially inward and radially outward.
- the coolant collector chamber 5 surrounds the second axial end section 14b of the respective stator winding 6 in a U-shaped manner, that is to say axially endwise and radially inward and radially outward.
- cooling channels 10 are provided both radially inside and radially outside of the stator winding 6.
- the respective stator windings 6 including their axial end portions 14a, 14b via the cooling channels 10 and the coolant distribution chamber 4 and the coolant collecting chamber 5 in direct thermal contact with the coolant K.
- This allows a particularly effective cooling of the stator winding 6, including the axial exposed to thermal stresses End sections 14a, 14b.
- the plastic compound 1 1 can also surround the axially projecting from the gap 9 of the stator body winding section of the stator 6 and thereby partially delimiting the coolant distribution chamber 4 and the coolant accumulator 5, so that the respective stator winding 6 and the respective winding section of the stator winding 6 electrically opposite Coolant is isolated when it flows through the respective cooling channel 10 during operation of the machine 1.
- the coolant distribution chamber 4 and the coolant collecting chamber 5 are arranged in an axial extension of the stator body 7 adjacent to this.
- the coolant distributor chamber 4 or the coolant collector chamber 5 does not protrude beyond the radial direction R of the stator body 7 or stator 2.
- the stator winding 6 is in each case designed such that it is electrically insulated from the coolant K and from the stator body 7 of the stator 2 during operation of the electric machine 1, at least in the area within the respective intermediate space 9. An undesired electrical short circuit of the stator winding 6 with the stator body 7 - during operation of the electric machine 1 - with the coolant K is prevented in this way.
- an electrical insulation of the stator winding 6 relative to the stator body 7, preferably also with respect to the gap 9 delimiting stator teeth 8, completely by the plastic material and / or by - already mentioned above - additional electrical insulation 15 is formed.
- the additional electrical insulation 15 extends within the gap 9 over the entire along the axial direction A measured Length of the gap 9 so that it isolates the stator winding 6 from the stator body 7 and / or from the stator teeth 8.
- the additional electrical insulation 15 encloses the stator winding 6 within the gap 9 over at least the entire length of the gap 9 along the circumferential boundary.
- stator winding 6 is also electrically insulated from the cooling channel designed as a tubular body 16.
- the electrical insulation is formed by the plastic compound and, alternatively or additionally, the additional electrical insulation 15.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019563862A JP2020521420A (ja) | 2017-05-19 | 2018-05-18 | 電気機械 |
US16/614,648 US11190063B2 (en) | 2017-05-19 | 2018-05-18 | Electrical machine |
DE112018002580.2T DE112018002580A5 (de) | 2017-05-19 | 2018-05-18 | Elektrische Maschine, insbesondere für ein Fahrzeug |
CN201880036984.5A CN110771009B (zh) | 2017-05-19 | 2018-05-18 | 尤其用于车辆的电动机 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017208550.9A DE102017208550A1 (de) | 2017-05-19 | 2017-05-19 | Elektrische Maschine, insbesondere für ein Fahrzeug |
DE102017208550.9 | 2017-05-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2018211087A1 true WO2018211087A1 (de) | 2018-11-22 |
Family
ID=62200461
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2018/063139 WO2018211087A1 (de) | 2017-05-19 | 2018-05-18 | Elektrische maschine, insbesondere für ein fahrzeug |
Country Status (5)
Country | Link |
---|---|
US (1) | US11190063B2 (de) |
JP (1) | JP2020521420A (de) |
CN (1) | CN110771009B (de) |
DE (2) | DE102017208550A1 (de) |
WO (1) | WO2018211087A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20230026553A1 (en) * | 2020-01-21 | 2023-01-26 | Mitsubishi Electric Corporation | Stator and rotary electric machine using same |
US11799361B2 (en) * | 2020-07-27 | 2023-10-24 | Ford Global Technologies, Llc | End covers configured to direct fluid for thermal management of electric machine for electrified vehicle |
FR3138018A1 (fr) * | 2022-07-12 | 2024-01-19 | IFP Energies Nouvelles | Machine électrique avec canal de refroidissement dans le matériau d’enrobage des têtes de bobines |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3960803A (en) * | 1973-06-22 | 1976-06-01 | Westinghouse Electric Corporation | Flexible nontacky prepreg for bonding coils in high voltage devices and method of making said prepreg |
US5214325A (en) | 1990-12-20 | 1993-05-25 | General Electric Company | Methods and apparatus for ventilating electric machines |
EP0581966A1 (de) * | 1992-02-21 | 1994-02-09 | Fanuc Ltd. | Mit ständerkühlmitteln ausgerüsteter motor |
FR2788385A1 (fr) * | 1999-01-13 | 2000-07-13 | Mitsubishi Electric Corp | Alternateur sans balais pour vehicule |
WO2005004309A1 (de) * | 2003-07-01 | 2005-01-13 | Siemens Aktiengesellschaft | Elektromotor für einen antrieb eines fahrzeugs, insbesondere bahnantriebe, sowie einen antrieb mit einem solchen elektromotor |
JP2005354821A (ja) * | 2004-06-11 | 2005-12-22 | Honda Motor Co Ltd | モータ |
EP1841043A1 (de) * | 2006-03-29 | 2007-10-03 | Moteurs Leroy-Somer | Eingegossene Maschine und dessen Herstellungsverfahren |
US20080042498A1 (en) * | 2006-06-27 | 2008-02-21 | Alexander Beer | Method for manufacturing an electric machine and electric machine manufactured according to said method |
US20120001503A1 (en) * | 2010-07-01 | 2012-01-05 | Rong-Jong Owng | Electric motor having heat pipes |
US20140265662A1 (en) * | 2013-03-14 | 2014-09-18 | Baldor Electric Company | Micro-Channel Heat Exchanger Integrated Into Stator Core of Electrical Machine |
DE102013223059A1 (de) * | 2013-11-13 | 2015-05-13 | Robert Bosch Gmbh | Elektrische Maschine mit vergossenem Wickelkopf |
WO2017070034A1 (en) * | 2015-10-19 | 2017-04-27 | National Oilwell Varco, L.P. | Motor with stator cooling system and method of construction |
Family Cites Families (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2390130A (en) * | 1943-06-04 | 1945-12-04 | Sigmund Corp | Cooling means for dynamoelectric machines |
JPS49115613U (de) | 1973-01-31 | 1974-10-03 | ||
JPS5143304U (de) | 1974-09-26 | 1976-03-31 | ||
JPS5798151U (de) * | 1980-12-04 | 1982-06-16 | ||
FR2497420B1 (fr) * | 1980-12-29 | 1985-11-15 | Anvar | Moteur lineaire a grande puissance massique |
JPS57137913A (en) | 1981-02-20 | 1982-08-25 | Nissan Motor Co Ltd | Reverse operating device of speed change gear |
JPS6079237U (ja) | 1983-11-07 | 1985-06-01 | 神鋼電機株式会社 | フレオンガス冷却誘導電動機の固定子冷却構造 |
JP2003070199A (ja) | 2001-08-27 | 2003-03-07 | Hitachi Ltd | モータまたは発電機及びその製造方法 |
JP3594007B2 (ja) | 2001-10-15 | 2004-11-24 | 日産自動車株式会社 | 回転電機 |
JP4496710B2 (ja) * | 2003-03-27 | 2010-07-07 | 日産自動車株式会社 | 回転電機の冷却構造 |
FR2857521B1 (fr) | 2003-07-11 | 2005-09-23 | Thales Sa | Refroidisseur d'un stator |
GB2420231B (en) | 2003-09-12 | 2006-08-02 | Bosch Gmbh Robert | Armature core for an electric motor |
US7705495B2 (en) * | 2006-11-17 | 2010-04-27 | Gm Global Technology Operations, Inc. | Cooling system for an electric motor |
JP5469873B2 (ja) * | 2008-03-11 | 2014-04-16 | 株式会社日立製作所 | 回転電機 |
ES2402667T5 (es) * | 2008-04-19 | 2016-06-28 | Grundfos Management A/S | Componente de carcasa de estator para un motor encapsulado hermético |
EP2320540A1 (de) | 2009-11-05 | 2011-05-11 | Siemens Aktiengesellschaft | Anordnung zur Kühlung einer elektrischen Maschine |
SE534838C2 (sv) * | 2010-05-21 | 2012-01-17 | Bae Systems Haegglunds Ab | Kylanordning för elmotor |
EP2451048A1 (de) * | 2010-11-04 | 2012-05-09 | Siemens Aktiengesellschaft | Magnetdeckelelement um einen Kühlkanal in einem Stator eines Generators zu schließen |
US20120161556A1 (en) * | 2010-12-28 | 2012-06-28 | Toyota Jidosha Kabushiki Kaisha | Superconducting electric motor |
CN102593975A (zh) * | 2012-03-23 | 2012-07-18 | 张承宁 | 一种电机定子冷却结构及其制备方法 |
DE102012217711A1 (de) * | 2012-09-28 | 2014-04-03 | Magna Powertrain Ag & Co. Kg | Elektrische Maschine mit Kühlung |
DE102012221325A1 (de) * | 2012-11-22 | 2014-05-22 | Robert Bosch Gmbh | Neuartige Wickelkopf-Kühlung |
JP6049566B2 (ja) * | 2013-08-08 | 2016-12-21 | 日立オートモティブシステムズ株式会社 | 回転電機 |
EP3048709B1 (de) * | 2013-12-05 | 2018-12-05 | Aisin Aw Co., Ltd. | Vorrichtung und verfahren zur formung eines spulenendes |
DE102014215916A1 (de) * | 2014-08-12 | 2016-02-18 | Schaeffler Technologies AG & Co. KG | Sensoreinrichtung für einen Elektromotor sowie Elektromotor mit der Sensoreinrichtung |
US9847702B2 (en) * | 2015-06-08 | 2017-12-19 | General Electric Company | In-situ method for sealing fluid cooled conduits for a generator |
-
2017
- 2017-05-19 DE DE102017208550.9A patent/DE102017208550A1/de not_active Withdrawn
-
2018
- 2018-05-18 WO PCT/EP2018/063139 patent/WO2018211087A1/de active Application Filing
- 2018-05-18 US US16/614,648 patent/US11190063B2/en active Active
- 2018-05-18 JP JP2019563862A patent/JP2020521420A/ja active Pending
- 2018-05-18 CN CN201880036984.5A patent/CN110771009B/zh active Active
- 2018-05-18 DE DE112018002580.2T patent/DE112018002580A5/de active Pending
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3960803A (en) * | 1973-06-22 | 1976-06-01 | Westinghouse Electric Corporation | Flexible nontacky prepreg for bonding coils in high voltage devices and method of making said prepreg |
US5214325A (en) | 1990-12-20 | 1993-05-25 | General Electric Company | Methods and apparatus for ventilating electric machines |
EP0581966A1 (de) * | 1992-02-21 | 1994-02-09 | Fanuc Ltd. | Mit ständerkühlmitteln ausgerüsteter motor |
FR2788385A1 (fr) * | 1999-01-13 | 2000-07-13 | Mitsubishi Electric Corp | Alternateur sans balais pour vehicule |
WO2005004309A1 (de) * | 2003-07-01 | 2005-01-13 | Siemens Aktiengesellschaft | Elektromotor für einen antrieb eines fahrzeugs, insbesondere bahnantriebe, sowie einen antrieb mit einem solchen elektromotor |
JP2005354821A (ja) * | 2004-06-11 | 2005-12-22 | Honda Motor Co Ltd | モータ |
EP1841043A1 (de) * | 2006-03-29 | 2007-10-03 | Moteurs Leroy-Somer | Eingegossene Maschine und dessen Herstellungsverfahren |
US20080042498A1 (en) * | 2006-06-27 | 2008-02-21 | Alexander Beer | Method for manufacturing an electric machine and electric machine manufactured according to said method |
US20120001503A1 (en) * | 2010-07-01 | 2012-01-05 | Rong-Jong Owng | Electric motor having heat pipes |
US20140265662A1 (en) * | 2013-03-14 | 2014-09-18 | Baldor Electric Company | Micro-Channel Heat Exchanger Integrated Into Stator Core of Electrical Machine |
DE102013223059A1 (de) * | 2013-11-13 | 2015-05-13 | Robert Bosch Gmbh | Elektrische Maschine mit vergossenem Wickelkopf |
WO2017070034A1 (en) * | 2015-10-19 | 2017-04-27 | National Oilwell Varco, L.P. | Motor with stator cooling system and method of construction |
Also Published As
Publication number | Publication date |
---|---|
CN110771009A (zh) | 2020-02-07 |
DE112018002580A5 (de) | 2020-03-05 |
US20200403463A1 (en) | 2020-12-24 |
CN110771009B (zh) | 2022-06-03 |
DE102017208550A1 (de) | 2018-11-22 |
JP2020521420A (ja) | 2020-07-16 |
US11190063B2 (en) | 2021-11-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2019002291A1 (de) | Elektrische maschine, insbesondere für ein fahrzeug | |
WO2018211089A1 (de) | Elektrische maschine, insbesondere für ein fahrzeug | |
WO2019110278A1 (de) | Elektrische maschine, insbesondere für ein fahrzeug | |
WO2018211096A1 (de) | Elektrische maschine, insbesondere für ein fahrzeug | |
WO2018211086A1 (de) | Elektrische maschine, insbesondere für ein fahrzeug | |
EP2807726B1 (de) | Rotor für eine rotierende elektrische maschine und elektromotor | |
DE102018219819A1 (de) | Elektrische Maschine, insbesondere für ein Fahrzeug | |
DE102018219817A1 (de) | Elektrische Maschine, insbesondere für ein Fahrzeug | |
WO2019002289A1 (de) | Elektrische maschine, insbesondere für ein fahrzeug | |
DE102018219820A1 (de) | Isolationskörper für eine elektrische Maschine | |
DE102018219818A1 (de) | Elektrische Maschine, insbesondere für ein Fahrzeug | |
WO2019110275A1 (de) | Elektrische maschine, insbesondere für ein fahrzeug | |
DE102018219816A1 (de) | Elektrische Maschine, insbesondere für ein Fahrzeug | |
EP3103183B1 (de) | Reluktanzrotor mit mechanischer stabilisierung | |
WO2018211088A1 (de) | Elektrische maschine, insbesondere für ein fahrzeug | |
DE102014213159A1 (de) | Anordnung zur Statorkühlung eines elektrischen Motors | |
WO2019110271A1 (de) | Elektrische maschine, insbesondere für ein fahrzeug | |
WO2020104425A1 (de) | Isolationskörper für eine elektrische maschine | |
DE102018219822A1 (de) | Isolationskörper für eine elektrische Maschine | |
WO2018211087A1 (de) | Elektrische maschine, insbesondere für ein fahrzeug | |
DE102016225342A1 (de) | Gehäuse einer elektrischen Maschine, Statoranordnung einer elektrischen Maschine sowie elektrische Maschine | |
WO2019110272A1 (de) | Verfahren zum herstellen eines stators für eine elektrische maschine | |
WO2019110274A1 (de) | Verfahren zum herstellen eines stators für eine elektrische maschine | |
WO2019110273A1 (de) | Elektrische maschine, insbesondere für ein fahrzeug | |
WO2019110276A1 (de) | Elektrische maschine, insbesondere für ein fahrzeug |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18725837 Country of ref document: EP Kind code of ref document: A1 |
|
DPE1 | Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101) | ||
ENP | Entry into the national phase |
Ref document number: 2019563862 Country of ref document: JP Kind code of ref document: A |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: R225 Ref document number: 112018002580 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 18725837 Country of ref document: EP Kind code of ref document: A1 |