WO2022017559A1 - Carter de moteur électrique et unité d'entraînement électrique - Google Patents

Carter de moteur électrique et unité d'entraînement électrique Download PDF

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Publication number
WO2022017559A1
WO2022017559A1 PCT/DE2021/100580 DE2021100580W WO2022017559A1 WO 2022017559 A1 WO2022017559 A1 WO 2022017559A1 DE 2021100580 W DE2021100580 W DE 2021100580W WO 2022017559 A1 WO2022017559 A1 WO 2022017559A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling jacket
housing
axial
electric motor
main housing
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/DE2021/100580
Other languages
German (de)
English (en)
Inventor
Marcel Peltrie
Philipp Storner
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of WO2022017559A1 publication Critical patent/WO2022017559A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/15—Mounting arrangements for bearing-shields or end plates
    • 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
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • 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

Definitions

  • the application relates to a housing for an electric motor, the housing having a main housing with a cylindrical inner section.
  • a cooling jacket with a cylindrical inner area is provided in the cylindrical inner section, in which a stator of the electric motor can be used for fastening and cooling.
  • the main housing has an axial mounting hole for inserting the cooling jacket into the inner cylindrical portion, the cooling jacket having a cooling jacket flange with which the cooling jacket is screwed to the main housing for axial securing.
  • Housings for electric motors and electric drive units are known, in which case the installation space required is also characterized by the associated gear arrangement in addition to accommodating the electric motor.
  • additional installation space is required due to the power electronics, which generally have a flat design and are regularly arranged tangentially to the electric motor in the housing.
  • the assembly of the stator of the electric motor does not usually take place via the mechanical output side of the electric motor, but via the opposite side, on which the rotor of the electric motor is usually secured with a floating bearing.
  • the stator is cooled on the outside by means of a cooling jacket that is pressed onto the stator.
  • the cooling jacket itself is fastened inside the housing with a screw flange in order to transfer the torque from the stator to the housing.
  • the opening in the housing for the electric motor is closed with a flange cover, which is usually sealed with a pasty sealant.
  • the object is achieved by a housing for an electric motor, where the housing has a main housing with a cylindrical inner portion.
  • a cooling jacket with a cylindrical inner area in which a stator of the electric motor can be used for attachment and cooling.
  • the main housing has an axial mounting opening for inserting the cooling jacket into the cylindrical inner section, the cooling jacket having a cooling jacket flange with which the cooling jacket is screwed to the main housing for axial and preferably also for radial securing. It is proposed that the cooling jacket flange closes the axial mounting opening of the main housing as part of the housing, and a first radial seal is provided between the cooling jacket flange and the zy-cylindrical inner section of the main housing in the region of the cooling jacket flange.
  • axial refers to the main axis of the cylindrical inner section of the main housing, it being possible for the main axis in the axial alignment to also be provided at the same time as the axis of rotation for a rotor of the electric motor.
  • radial refers to directions that are perpendicular to axial directions and thus perpendicular to the main axis mentioned or also to the axis of rotation of the rotor.
  • the cooling jacket is inserted by pushing it in the axial direction via the axial assembly opening into the cylindrical inner section, which has a circular basic shape.
  • the axial assembly opening is the cross-section of the cylindrical inner portion completely free for this.
  • the diameter of the inner cylindrical portion may increase or decrease along the length along the major axis according to the requirements of the demolding requirements of a casting.
  • the cooling jacket forms an outer surface of the housing at least in the area of the coolant flange. Consequently, the first, radial seal, which for example can be in the form of an O-ring, a seal which seals the housing to the outside from the environment.
  • the cooling jacket for a stator which closes the main housing, in combination with the first, radial seal enables a significantly reduced installation space for the housing, since in this way there is no axial seal on the main housing, for example in the form of a sealing paste applied to the flange. necessary is. Furthermore, by closing the housing through the cooling jacket, an additional flange for closing the cylindrical inner portion of the main housing can be avoided, both of which lead to a reduced overall space, particularly in the radial direction of the housing, in the area of the intended electric motor.
  • the cooling jacket is secured by a screw connection to the main housing, the fuse also serving to absorb the torque which is transmitted to the cooling jacket via a stator inserted into the cooling jacket.
  • the screw connection is preferably provided radially outside of the first radial seal. Due to the radial seal, the number of screwing positions on the cooling jacket flange can be reduced compared to an axial seal, since the requirements for a uniform contact pressure over the circumference for an axial seal are avoided.
  • the cooling jacket flange closes the axial mounting opening of the main housing by means of an axial, circumferential contact between the main housing and the cooling jacket flange.
  • the cooling jacket flange preferably protrudes radially beyond the contour of the cylindrical inner section and correspondingly also beyond the inserted area of the cooling jacket.
  • the cooling jacket flange therefore preferably forms a stop in the form of circumferential contact with the main housing, in particular with the axial one Edge of the main housing, whereby the cooling jacket flange with the main housing closes the housing to the outside.
  • the axial, peripheral contact has a minimum width of less than 4 mm in places.
  • a corresponding minimum width of the circumferential contact which preferably has a minimum width of at least 2 mm, allows a sufficient contact area for power transmission from the cooling jacket to the main housing.
  • the cooling jacket flange can have a width that exceeds the minimum width.
  • the area of the minimum width can further minimize the installation space requirement in partial areas along the circumference.
  • the positions of through-holes in the cooling jacket flange can be selected accordingly.
  • the cooling jacket has a cover structure axially, which closes off the cylindrical inner section on the side of the cooling jacket flange axially outwards and forms an axial outer wall of the housing at least in some areas.
  • the cooling jacket closes the cross-sectional area of the cylindrical inner section in which the cooling jacket itself is inserted, to the extent that the cover structure forms an axial outer surface of the housing, at least in some areas. Further housing parts can thus be provided, which form an axial outer wall of the housing in the projection of the cylindrical inner section. The use of additional axial covers can be avoided or minimized by means of the cover structure.
  • the cover structure includes a bearing seat for a rotor of the electric motor.
  • the bearing forces can be introduced directly into the main housing via the cooling jacket, whereby the connection are minimized during power transmission.
  • the installation space requirement can be reduced by the bearing seat in the cooling jacket.
  • the cover structure has at least one axial opening for a rotor of the electric motor and/or at least one electrical line to pass through, with the housing comprising at least one axial assembly cover which is screwed to the cooling jacket and the axial opening or the axial openings of the cover structure of the cooling jacket closed.
  • An axial opening for the passage of a rotor can be provided in particular in the area of a bearing seat, in order to enable, for example, the use of a rotor position encoder, in particular axially outside the cover structure.
  • the rotor position sensor can preferably be mounted on the outer side of the cover structure of the cooling jacket.
  • an axial opening for the passage of an electrical line or a cable harness for the transmission of sensor signals can be provided.
  • assembly or electrical contacting of a stator pressed into the cooling jacket can also take place via the axial opening, so that the electrical interfaces can be connected to the stator via the axial opening.
  • the axial opening or the axial openings can be closed by means of the axial assembly cover, which is preferably sealed with an axial seal. It is preferred if the axial assembly cover is screwed to the cooling jacket, in particular to the cover structure of the cooling jacket. Furthermore, the axial assembly cover preferably covers electrical lines and sensors. The axial assembly cover preferably lies within the contour of the cooling jacket or the cooling jacket flange and preferably forms the axial outer surface of the housing in the area of the cylindrical inner section in addition to the cover structure.
  • a cooling volume is provided between the cooling jacket and the cylindrical inner section for liquid cooling, where wherein the cooling volume is sealed towards the cooling jacket flange by a second, radial seal.
  • a second, radial seal It is therefore possible, for example, to use two identical sealing rings, preferably O-rings. These are preferably expanded to slightly graduated diameters. The seal is thus simplified overall and more cost-effective.
  • a coolant flow can preferably be applied to the cooling volume between the cooling jacket and the main housing by means of a radial inlet and a radial outlet in the main housing.
  • cooling volume is sealed by a third, radial seal on the side facing away from the cooling jacket flange.
  • a third, radial seal on the side facing away from the cooling jacket flange.
  • three identical radial seals or sealing rings preferably O-rings, can be used. These are preferably expanded to slightly graduated diameters.
  • the cooling jacket has a first, radial opening between the first, radial seal and the second, radial seal. This enables a simple connection to the electric motor provided in the cooling jacket, in particular with a Sta tor provided in the cooling jacket. Therefore, electrical lines for power transmission and/or signal transmission can be routed out of the cooling jacket via the radial opening of the cooling jacket.
  • the radial opening is preferably connected to an axial opening, so that the radial opening can be used from both sides of the axial opening.
  • the first, radial opening is divided in two, with one part being arranged on each side of the cover structure of the cooling jacket.
  • the main housing has a second, radial opening to the inner cylindrical section, which corresponds to the first, radial opening of the cooling jacket. Accordingly, electrical lines for the power Transmission and/or signal transmission via the radial openings in the cooling jacket and the main housing can be fed out or in, so that the housing can be used to easily connect an electric motor to power electronics, which can preferably be attached to the main housing adjacent to the cylindrical inner section. is possible. Furthermore, as a result, large-area covers can be dispensed with, so that a weight saving can also be achieved.
  • an electric drive unit with an electric motor in a housing according to one of claims 1 to 9, wherein the stator of the electric motor is pressed into the cooling jacket, wherein at least one electric line for a power supply of the electric motor and/or at least one electric Line for signals are passed through a first, radial opening of the cooling jacket and a second, radial opening of the cylindrical inner portion of the main housing.
  • the electric drive unit can be designed in a particularly compact design, and weight savings can also be achieved.
  • the number of construction parts can also be minimized.
  • the electrical and signaling connection of the electric motor to electronics or power electronics can be implemented in a simple manner via the first and second, radial opening.
  • the second, radial opening preferably leads to an area on the main housing that is provided for the power electronics, which can be closed with a separate cover, so that no sealing is required when passing through the first and second, radial opening.
  • each part of a corre-sponding and tolerance-compensating plug connection is performed, which at one Assembly of the power electronics after assembly of the electric motor when Einset zen the power electronics can be engaged with each other, so that the electrical line or electrical lines can be guided by means of the connector through the corresponding first and second radial opening.
  • the connector on the power electronics side is preferably assembled directly on the circuit board.
  • FIG. 1 shows a housing for an electric motor in a sectional view
  • Figure 2 shows a cooling jacket and an axial assembly cover
  • FIG. 3 shows a main housing with a cooling jacket and an axial assembly cover in an exploded view
  • FIG. 4 shows a main housing and a cooling jacket in a plan view
  • Figure 5 shows a main body and electric lines of a power electronics
  • FIG. 6 shows an electric drive unit with an electric motor in a housing.
  • FIG. 1 shows an advantageous embodiment of a housing 1 for an electrical cal drive unit 20 in a sectional view.
  • the housing 1 is made up of several parts and has a main housing 2 which is closed with several covers 25 .
  • the housing 1 serves to accommodate an electric motor 21, a Power electronics 26 and a gear 27, see also Figure 6.
  • a cylindrical inner portion 3 is provided for receiving the electric motor 21 see, which can be inserted through an axial mounting hole 4.
  • the main axis of the cylindrical inner section 3 is provided as the axis of rotation 19 of the electric motor 21 .
  • Directional indications that are parallel to the axis of rotation 19 with respect to the housing 1 are axial, whereas directional indications perpendicular to the axis of rotation 19 are radial.
  • a cooling jacket 5 is inserted via the axial Mon day opening 4, which has a cylindrical inner region 6 for a stator 22 of the electric motor 21.
  • the cooling jacket 5 forms on its outside with the cylindrical inner section 3 of the main housing 2 a cooling volume 16 through which a coolant can flow.
  • the cooling jacket 5 has windings 29 for a uniform flow of coolant through the cooling volume 16 .
  • the cooling volume 16 extends along the axis of rotation 19 in the form of a hollow cylinder, in which the windings 29 are arranged, and is between the cooling jacket 5 and the main housing 2 by a second, radial seal 11 and on the other side by a third, radial seal 12 limited and sealed.
  • the second and third radial seals 11, 12 are each an annular seal, for example an O-ring.
  • the main housing 2 preferably has a radial inlet and a radial outlet for the cooling volume 16, which allow coolant to flow in the cooling volume 16 between the second, radial seal 11 and third, radial seal 12 along the turns 29 of the cooling jacket 5.
  • the cooling jacket 5 has a cooling jacket flange 7 which has through bores 31 distributed over the circumference for screwing to the main housing 2 by means of screws 28 .
  • the cooling jacket flange 7 rests on the axial edge of the main housing 2 around the axial mounting opening 4, and thus closes the axia le mounting opening 4 via an axial, circumferential contact 9.
  • radial seal 10 is provided, which protects against environmental influences and possibly also pressure-tight closure of the housing 1 on the cooling jacket flange 7 ensures.
  • Securing the cooling jacket 5 to the main housing 2 leads not only to the closure of the housing 1 but also to a non-rotatable fixing and securing of the axial and radial position of the cooling jacket 5, so that torques can be transmitted from an electric motor 21 to the main housing 2 via the cooling jacket 5.
  • the cylindrical part of the cooling jacket 5 in the inner section 3 of the main housing 2 assumes the main radial guidance or securing of the cooling jacket.
  • the cooling jacket 5 has an integral cover structure 8, which forms part of the outer wall of the housing 1 with the cooling jacket flange 7 and protects the interior of the housing 1 from environmental influences.
  • two axial openings 14 are provided in the cover structure 8 (see also FIG. 2), which are closed by an axial assembly cover 15.
  • One of the two axial openings 14 is provided for the passage of a rotor shaft 30 of a rotor 23 which can be mounted on a bearing seat 13 in the cover structure 8 .
  • FIG. 2 shows the cooling jacket 5 and the axial assembly cover 15 in a view in which the surfaces which form the outside in this area of the housing 1 can be seen. Accordingly, the cover structure 8 of the cooling jacket 5 with various struts within the cooling jacket flange 7 can be seen.
  • Farther on is the arrangement of the through-holes 31 on the cooling jacket flange 7, which shows an uneven distribution of a comparatively small number of through-holes 31 for screwing or securing the cooling jacket 5. Since the first, radial seal 10 seals the housing 1 independently of the distribution of the pressure forces on the axial, circumferential contact 9, bottlenecks in the installation space can be avoided by the arrangement of the through bores 31 or the screw points. In alternative exemplary embodiments, a uniform distribution can also be provided.
  • the width of the axial, peripheral contact 9 corresponds to the wall thickness of the main housing 2 in this area and can preferably be less than 2 mm in sections with a minimal width. sections minimum width can be interrupted at the screw points by locally enlarged contact surfaces, so that a greater width of the axial, circumferential contact 9 can be provided in the area of the through-holes 31 or the screw points.
  • the two axial openings 14 in the cover structure 8 can be seen in FIG.
  • the axial openings 14 for a rotor shaft 30 that can be seen in FIG to connect electrical power or to connect it to a stator 22 in the cooling jacket 5 .
  • sensors 32 for example a rotor position sensor or a speed sensor, can be provided on the cover structure 8 of the cooling jacket 5.
  • the electrical lines 24 for the transmission of the measurement data from the sensor system 32 can be routed out of the cooling jacket 5 via a first, radial opening 17, if necessary using a plug connection.
  • the sensor system 32 like the two axial openings 14, is closed by an axial assembly cover 15, which can be screwed to an axial seal 34 with the cover structure 8 of the cooling jacket 5.
  • FIG. 3 shows a cooling jacket 5 which is partially inserted into the cylindrical inner section 3 of the main housing 2.
  • FIG. Due to the three radial seals 10, 11, 12, the cooling jacket 5 can be installed very easily by pushing in the cooling jacket 5 until the cooling jacket flange 7 forms an axial, circumferential contact 9 with the axial end face of the main housing 2, so that an axial stop is reached is.
  • a correct, rotational alignment of the cooling jacket 5 in the main housing 2 can be recognized in a simple manner by the uneven distribution of the screw positions, see also FIG.
  • the cooling jacket 5 can be secured by means of a screw connection, the first, radial seal 10, which in this exemplary embodiment is in a circumferential groove in the Cooling jacket is placed, automatically forms a sealing contact with the main body 2 during assembly.
  • the bearing seat 13 integrated in the cover structure 8 of the cooling jacket 5 is simultaneously also secured in a stationary manner and is set up to absorb bearing forces.
  • the axial assembly cover 15 can be closed after the electrical connections provided in the housing 1 have been connected.
  • FIG. 4 shows the main housing 2 with the cooling jacket 5 not inserted in a top view, the part of the main housing 2 which is provided for power electronics 26 of an electric drive unit 20 being visible without the cover 25 .
  • the connection between the electric motor 21 provided in the cooling jacket 5 and the power electronics 26 provided outside of the cylindrical inner section 3 of the main housing 2 can be established via a first, radial opening 17 in the cooling jacket 5 between the cooling volume 16 and the first, radial seal 10 and a second, radial opening 18 may be provided in the main housing 18, the first, radial opening 17 and the second, radial opening 18 in the assembled state of the cooling jacket means 5 at least partially overlap and correspond accordingly.
  • FIG. 5 shows the power electronics 26 of an electric drive unit 20, which is placed on the main housing 2 from above.
  • the electrical lines 24 in the form of a wiring harness for sensor data and busbars for high-voltage AC can be routed through the second, radial opening 18 and the first, radial opening 17 into the connection space 33 .
  • FIG. 6 shows an exemplary embodiment of an electric drive unit 20 in a housing 1 in a sectional illustration, the electric drive unit 20 comprising an electric motor 21 with the axis of rotation 19 .
  • the electric motor 21 includes a stator 22 which is pressed into the cylindrical inner region 6 of the cooling jacket 5 so that the stator 22 is fixed relative to the cooling jacket 5 and has a large thermal contact area on the outside of the cooling jacket 5 's.
  • the rotor 23 of the electric motor 21 is arranged, wherein the rotor shaft 30 of the rotor 23 is rotatable in the housing 1 about the axis of rotation 19 gela siege. It is supported by two roller bearings 35, the right roller bearing 35 in FIG.
  • the right-hand side in the illustration in FIG. 6 represents the mechanical output side of the electric motor 21, which is also referred to as the A shield.
  • a transmission 27 is arranged behind the A-plate.
  • the left side in this illustration is also referred to as the B shield.
  • the assembly of the electromobility sector 21 and accordingly also the assembly of the cooling jacket 5 takes place on the side of the B-shield via the assembly opening 4, which allows access to the nikför-shaped, cylindrical inner section 3 of the flap housing 2.
  • the electric motor 21 can be correspondingly pushed together with the cooling jacket 5 along the axis of rotation 19 axially into the cylindrical inner portion 3 during assembly.
  • the axial assembly opening 4 is closed by the cooling jacket 5 itself, in particular by the cover structure 8 and the cooling jacket flange 7.
  • a large-area cover component in the area of the B-shield can therefore be dispensed with, which correspondingly leads to savings in assembly and weight.
  • the first, radial seal 10 enables the housing 1 or the dry connection space 33 to be sealed without the need for pressure forces through the cooling jacket flange 7, so that the cooling jacket flange 7 can only be used at a few points for torque transmission. tion of the stator 22 and for the transmission of the bearing forces from the bearing seat 13 to the main housing 2, a screw connection is necessary for securing.
  • the flange width for sealing the mounting opening 4 can be reduced by avoiding an axial seal, so that the width of the contact surface can be minimized to the order of magnitude of the wall thickness of the main housing 2 .
  • the necessary installation space of the housing 1 in the area of the assembly opening 4 can be significantly reduced in the radial direction.
  • the use of the cooling jacket 5 to close the assembly opening 4 avoids an additional cover flange, as a result of which the axial space requirement or the axial dimensions can also be reduced.
  • the rotor 23 is preferably first inserted into the axial assembly opening 4 and then the stator 22 pressed with the cooling jacket 5 is also pushed into the axial assembly opening 4 via the rotor 23.
  • the cooling jacket 5 is then secured to the cooling jacket flange 7 by means of screws 28 on the main housing 2.
  • the fixed bearing on the A-shield can be formed with the aid of a retaining ring 36 which is pushed over the pinion 37 of the rotor shaft 30 .
  • the electrical power is transmitted to the stator 22 by power electronics 26, which are arranged above the electric motor 21 between the main housing 2 and the cover 25 in FIG.
  • various signals are to be transmitted from a sensor system 32 to the power electronics system 26 .
  • the electric drive unit 20 has, among other things, a rotor position transmitter as a sensor system 32 , which is accommodated axially on the outside on the cover structure 8 .
  • signals from sensors 32 on or in the stator 22, for example the temperature of the stator 22, can be detected, which lines are also transmitted by means of electrical lines 24 or a cable harness to the power electronics 26.
  • the electrical lines 24 are connected to the stator 22 in a connection space 33 which extends between the stator 22 and the cover structure 8 .
  • the electrical lines 24 can be routed from the connection space 33 via a first, radial opening 17 in the cooling jacket 5 and a second, radial opening 18 in the main housing 2 to power electronics 26, see Figure 4.
  • the electrical lines 24 for the signals of the sensors 22 are also routed from the outer side of the cover structure 8 to the power electronics 26, with the electrical lines 24 being routed through an axial opening 14 in the cover structure 8.
  • the axial opening 14 in the cover structure 8 of the cooling jacket 5 also allows the LV and HV-AC interfaces in the connection space 33 to be connected to the stator 22.
  • electrical cables 24 can already be connected to the Power electronics 26 are plugged in to allow access to any connector.
  • busbars as electrical lines 24 can be guided through the second, radial opening 18 in the main housing 2 and the first, radial opening 17 in the cooling jacket 5 into the connection space 33, where they connect to the connections via the axial opening 14 can be connected to the stator 22.
  • the plug-in contacts of a plug-in connection can also be used as electrical lines 24 which are routed through the first, radial opening 17 and second, radial opening 18 .
  • the axial assembly cover 15 covers the axial openings 14 for access to the connection space 33 and the passage for the rotor shaft 30 and the sensors 32, and is screwed together with an axial seal 34 on the cover structure 8 of the cooling jacket 5.
  • the axial assembly cover 15 no longer has to span the signal interface to the power electronics since this is routed directly to the power electronics 26 via the first and second, radial openings 17 , 18 .

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

Abstract

L'invention se rapporte à un carter (1) de moteur électrique (21). Le carter (1) comprend un carter principal (2) muni d'une partie interne cylindrique (3). Une chemise de refroidissement (5) munie d'une région interne cylindrique (6), dans laquelle un stator (22) du moteur électrique (21) peut être inséré pour la fixation et le refroidissement, est disposée dans la partie interne cylindrique (3). Le carter principal (2) est muni d'une première ouverture de montage axiale (4) permettant l'insertion de la chemise de refroidissement (5) dans la partie interne cylindrique (3). La chemise de refroidissement (5) est munie d'une bride de chemise de refroidissement (7), au moyen de laquelle la chemise de refroidissement (5) est vissée au carter principal (2) pour une fixation axiale. La bride de chemise de refroidissement (7) ferme la première ouverture de montage axiale (4) du carter principal (2) en tant que partie du carter (1), et un premier joint radial (10) est disposé entre la bride de chemise de refroidissement (7) et la partie interne cylindrique (3) du carter principal (2) dans la région de la bride de chemise de refroidissement (7). L'invention se rapporte également à une unité d'entraînement électrique (20) munie d'un moteur électrique (21) dans un carter (1), le stator (22) du moteur électrique (21) étant ajusté par pression dans la chemise de refroidissement (5), et au moins une ligne électrique (24) permettant d'alimenter en énergie le moteur électrique (21) et/ou au moins une ligne électrique (24) de signaux étant introduites dans une première ouverture radiale (17) dans la chemise de refroidissement (5) et une seconde ouverture radiale (18) dans la partie interne cylindrique (3) du carter principal (2).
PCT/DE2021/100580 2020-07-24 2021-07-05 Carter de moteur électrique et unité d'entraînement électrique Ceased WO2022017559A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020119590.7 2020-07-24
DE102020119590.7A DE102020119590A1 (de) 2020-07-24 2020-07-24 Gehäuse für einen Elektromotor und elektrische Antriebseinheit

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WO2022017559A1 true WO2022017559A1 (fr) 2022-01-27

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WO (1) WO2022017559A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022106785A1 (de) 2022-03-23 2023-09-28 Schaeffler Technologies AG & Co. KG Lageranordnung
DE102022106783A1 (de) 2022-03-23 2023-09-28 Schaeffler Technologies AG & Co. KG Lageranordnung

Citations (3)

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JP2019221054A (ja) * 2018-06-19 2019-12-26 株式会社ケーヒン 電動機の冷却装置

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