WO2024251954A1 - Moteur électrique à assemblage amélioré - Google Patents
Moteur électrique à assemblage amélioré Download PDFInfo
- Publication number
- WO2024251954A1 WO2024251954A1 PCT/EP2024/065747 EP2024065747W WO2024251954A1 WO 2024251954 A1 WO2024251954 A1 WO 2024251954A1 EP 2024065747 W EP2024065747 W EP 2024065747W WO 2024251954 A1 WO2024251954 A1 WO 2024251954A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electric motor
- stator
- teeth
- motor according
- rotor
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- 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
- H02K5/08—Insulating casings
-
- 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
- H02K5/22—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
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
- H02K2211/03—Machines characterised by circuit boards, e.g. pcb
Definitions
- the present invention relates to the field of electric motors, and in particular electric motors for fans.
- One of the manufacturing techniques for such motors consists of providing a crown-shaped plastic coil support in which teeth are inserted, consisting of stacks of ferromagnetic sheets magnetically connected by a yoke. These overmolded teeth are surrounded by a winding wire, generally made of copper insulated by a varnish. The wires of these coils are connected by metal tracks welded to the wires of each of the coils according to an appropriate topology.
- This type of motor has several drawbacks such as the axial size resulting from the inter-coil connection, as well as the number of parts to be assembled during manufacturing, and complex assembly processes to ensure reliability, robustness and competitive industrialization.
- patent application WO2003081755A1 is known in the prior art, which relates to a stator intended for an electric motor, in particular for a high-power low-voltage motor of the external armature motor type, and which comprises a stack of stator laminations provided with a multitude of stator grooves and stator teeth for housing stator windings, as well as an interconnection system for interconnecting the wires of the stator windings.
- the stator windings wound around the stator teeth through the stator grooves overhang the stack of stator laminations by a winding head on both end faces.
- the interconnection system consists of winding contact elements as well as interconnection contact elements, the interconnection contact elements at least being arranged on one end face of the stator lamination stack substantially within a space delimited by the stator windings and by a plane defined by the winding head.
- US patent application US2012098363 relates to a pot-shaped stator support, on the radial outer side of which a stator base body is arranged.
- This stator base body has an inner yoke ring, from which stator teeth formed in one piece with the yoke ring project radially outwards.
- Insulating coil bodies wound with coils are connected and snapped radially from the outside onto the stator teeth, and on the radial outer side of the coil bodies, receiving pockets for insulation displacement elements of an interrupting ring, which extend in the axial direction, are formed in one piece on the coil body.
- US Patent US10243434 discloses a stator of an electric motor comprising a core, and a coating overmolded on the core.
- the mold for overmolding the coating on the core comprises first and second portions defining a cavity and pluralities of first and second pins extending at least generally to some opposed portions among the portions defining a cavity.
- the cavity is configured to receive the core.
- the first pins and the second pins are configured to extend into the cavity when the mold is in a closed position so as to at least partially secure the core in the cavity.
- the object of the present invention is to overcome these drawbacks and concerns an electric motor comprising a stator comprising a plurality of radial teeth constituted by packs of ferromagnetic sheets and overmolded to form an overmolded stator support, said stator support having between each tooth a notch provided to accommodate the wire of an electric coil, at least part of said overmolded teeth being surrounded by an electric coil after overmolding of the pack of ferromagnetic sheets constituting it, said stator support having, at the front end of the teeth, a tubular casing delimiting a cylindrical cavity to receive a rotor, characterized in that said overmolded stator support is closed at least partially by a transverse disc partition having an axial sleeve for centering the rotor shaft, and in that the outer surface of said transverse disc partition, opposite the cylindrical cavity of the rotor, has means for mechanically fixing at least one of the electrical elements constituted by:
- the stator support is constituted by a single ferromagnetic sheet pack having a plurality of radial teeth, said overmolded stator support being surrounded by a ferromagnetic stator ring and in that the electric coils are formed of a wire wound on said overmolded teeth of said single ferromagnetic sheet pack.
- Said axial centering sleeve is formed by a tubular neck with a closed bottom.
- Said axial centering sleeve is formed by a tubular neck with an open bottom.
- Said axial centering sleeve is capable of receiving a guide bearing for the shaft of said rotor.
- Said axial centering sleeve comprises a smooth bearing for guiding the shaft of said rotor.
- Said axial centering sleeve comprises a passage crossed by the shaft of said rotor.
- Said transverse disc partition is connected to the tubular casing of the stator support by a plurality of deformable zones.
- Said deformable zones are in the form of connecting arms inclined relative to the radius.
- Said connecting arms are connected to the tubular casing of the stator support in an area centered on a tooth.
- the stator support has anchoring means located between two consecutive notches.
- Said anchoring means consist of fixing eyelets located in radial extensions of the stator support.
- Said anchoring means consist of axial studs.
- Said tubular envelope has between each tooth an axial weakening groove to allow elastic angular movement of said teeth on either side of the radial reference plane.
- the inner surface of said transverse disc septum, closing the cylindrical cavity of the rotor, has stiffening ribs to prevent warping of the transverse disc septum.
- the connecting arms constituting the deformable zones are extensions of the stiffening ribs.
- the invention relates to a motor consisting of a stator assembly (100) with overmolded teeth (120) surrounded by coils, forming a tubular casing (141) defining a cylindrical cavity (250) in which the rotor (200) rotates.
- the invention of which the represents a non-limiting example, relates more particularly to the configuration of the stator assembly, (100) consisting of a set of overmolded teeth (120), with coils wound on the overmolding of the teeth (120), and a ferromagnetic stator crown (110) to form a tubular part which is distinguished from the prior art by the fact that it is closed by a transverse disc partition (151), which can be perforated, and which fulfills a main function of centering a rotor (200) relative to the stator (100), and an additional function of maintaining certain of the electrical elements of the stator by means of the reliefs, in the form of protuberances (155) or cavities formed on one of the surfaces of the transverse disc partition (151).
- stator block (100) forms a single plastic part overmolding the ferromagnetic teeth, to form a robust component directly ensuring the centering of the rotor relative to the wound teeth, as well as a robust connection of the electrical elements supplying the coils, and resistant to vibrations and other disturbances.
- the centering of the axis is ensured by an axial sleeve (152), which can be open or with a closed bottom.
- the guiding of the axis inside this sleeve is ensured in a conventional manner, for example by a rolling bearing or a plain bearing.
- an optional solution consists in providing for the transverse disc partition (151) of the stator part deformable peripheral zones, in the annular zone between the periphery of the transverse disc partition and the tubular casing (141) for example peripheral recesses alternating with radial beams, or inclined arms allowing the transverse disc partition to take its dimension after overmolding without breaking the disc part if it is too constrained by the tubular casing, nor deforming this tubular casing in the event of reduction of the diameter of the disc partition by phenomenon of shrinkage of the plastic during cooling.
- stator assembly is configured to allow angular movement of the teeth, in order to reduce the noise caused by the detent torque when changing from one step to the next step.
- This angular movement is obtained by a local weakening of the overmolding, for example by the formation of lights (175) at the periphery of the transverse disc septum (151), and/or by axial grooves (146) formed between the teeth (120) in the tubular casing (141).
- Each tooth (120) is formed by a block of stacked overmolded sheets forming the insulated body receiving the winding after overmolding.
- the teeth (120) are preferably overmolded, leaving the rear face flush, to come into mechanical and magnetic contact with a ferromagnetic stator ring (110) surrounding the tubular casing, and preserving, between each tooth, a notch (135) allowing the passage of the winding wire before the installation of the ferromagnetic stator ring.
- the teeth can also radially extend a tubular crown, the ferromagnetic assembly then being overmolded.
- the winding is then knitted by alternately passing the wire up and down, around the body formed by each overmolded tooth, or from notches provided on the inner surface of the overmolded assembly.
- the reliefs formed on the surface of the transverse disc partition (151) have, for some, support pads (650) for the turning back of the winding wire, and others have the shape of ribs (158) and can ensure a raising of certain sections of the winding wire, to prevent them from coming into contact with the conductive tracks (610, 620, 630) provided on the surface of the transverse disc partition (151) and from causing a short circuit when the wire is accidentally stripped or delaminated, or can also be used for positioning the conductive tracks (610, 620, 630).
- the reliefs can also be made up of pins (154) intended to provide a function of holding the conductive tracks (610, 620, 630) by punching on the upper part of these pins (154).
- the reliefs can be cylindrical protuberances (155) provided with drilling to constitute a means of anchoring an electronic card (400) electrically connected to the connection assembly (600).
- the exemplary embodiment described with reference to figures 1 to 6 concerns a “pancake” type electric motor used for fans, in particular for forced ventilation functions, and particularly that of polyphase motors with electronic commutation with pilot control integrated into the motor housing and coils exposed to the air flow to allow optimum cooling.
- the solution which is the subject of the present invention is particularly interesting for the construction of a motor of low thickness and high power (greater than 1 KW) used for example for cooling the components of a rapid charging device for an electric vehicle, but it can be used for any type of ventilation or pump drive motor allowing the use of the fluid flow to cool the stator coils located in the space exposed to the air flow.
- the stator assembly (100) is provided with an overmolded stator support (150) having a generally tubular part comprising the overmolded teeth (120), one of the axial ends of this tubular part is closed transversely by a transverse disc partition (151) comprising an axial sleeve (152) for centering and guiding the rotor (200).
- an overmolded stator support (150) having a generally tubular part comprising the overmolded teeth (120), one of the axial ends of this tubular part is closed transversely by a transverse disc partition (151) comprising an axial sleeve (152) for centering and guiding the rotor (200).
- This transverse disc partition (151) is greater than 50% of the surface area of the internal cavity of the tubular casing (141), with solid parts directly connecting the guidance of a central axis and connection zones with the tubular casing (141), without the interposition of an additional part fixed on the stator part, to avoid any risk of deformation as well as to reduce tolerances and industrialization difficulties.
- the overmolded stator support (150) is closed by a guide flange (190) which is preferably fixed by laser welding or heat welding.
- the rotor (200) has a shaft (350) which is guided on the one hand by the transverse disc partition (151) and on the other hand by the guide flange (190).
- the stator support (150) is formed by overmolding, by injection of a plastic material, a set of radial teeth (120) also formed by a pack of sheets, flush with the outer periphery to come into mechanical and magnetic contact with a peripheral stator ring (110) surrounding the stator support (150).
- This overmolding makes it possible to form coil bodies (140), making it possible to produce the winding generating the magnetic field interacting with the rotor (200).
- These coil bodies (140) extend radially along the teeth from the tubular casing (141), the inner surface of which coincides with the front of the teeth (120), to the peripheral radial end, called distal, of the teeth.
- the coil bodies thus form a thin casing along the teeth, intended to ensure good electrical insulation between the coil wire and the stack of ferromagnetic sheets constituting the teeth.
- the radial extension of the coil bodies is done along the teeth (120) with a minimum thickness making it possible to maximize the space intended for the electric coils (130) while ensuring electrical insulation between the coils (130) and the stack of sheet metal of the teeth (120).
- the tubular casing (141) extends axially to provide a front support surface for the wire during the winding operation.
- the axial extension of the tubular envelope (141) projecting from the transverse disc septum (151) forms a frontal annular extension (148).
- the transverse disc partition (151) and the frontal annular extension (148) form an inner zone (170) intended to receive the end of the winding wires to ensure their electrical connection.
- the frontal annular extension (148) is provided with notches (), or slots, to allow the passage of the winding wire between the coil body (140) and the inner zone (170), while ensuring axial and transverse guidance of the latter.
- the coil bodies (140) extend axially and tangentially, over the desired coil extent, so as to provide a distal support zone for the coil wires (130).
- the distal tangential extension of the coil bodies (140) takes place on peripheral angular sectors (142) which are not contiguous between the teeth (120), but leave a free angular sector (143) to facilitate the routing of the wire during the winding operation.
- said tubular envelope (141) defines, on the side of the transverse disc partition (151) opposite the internal zone (170), a cylindrical cavity (250) for receiving the rotor (200).
- This cylindrical cavity (250) can be closed, on the side opposite the transverse disc partition (151), by a guide flange (190).
- the axial sleeve (152) is crossed by a central shaft (350) intended for centering and guiding the rotor (200).
- the shaft (350) is connected to the rotor (200) and guided by bearings (230, 240) provided respectively in the axial sleeve (152) formed on the transverse disc partition (151) and in a housing (195) of the guide flange (190).
- the sheet metal pack constituting the teeth is produced as a single assembly in the form of a tubular ring extended radially by the teeth.
- the overmolding axially adjoins the internal periphery of the tubular ring.
- the skilled person could nevertheless imagine variants for which the teeth would not be joined by the sheet metal pack, but would be secured by the plastic overmolding.
- the tubular ring would therefore be formed from the end of the teeth connected by arched sections in overmolding. It could also be imagined that the front end of the teeth would be covered with overmolding resin to protect the sheet metal pack from the teeth, this operation nevertheless being accompanied by an increase in the magnetic air gap and therefore a reduction in the performance of the machine.
- the transverse disc partition (151) has an additional function of mechanically fixing electrical elements of the stator, which can in particular take the form of turning points of the single winding wire, means of fixing the interconnection tracks of the coils, or even the means of fixing the electronic card (400) for controlling the motor by electrical power supply of the coils.
- the upper surface of the transverse disc partition (151) has pins (154), constituting plastic rivets for fixing by plastic riveting of the inter-coil connection tracks (610, 620, 630) which will be detailed below.
- the conductive tracks (610, 620, 630) are fixed before the start of winding.
- transverse disc septum (151) is delimited on its periphery by a frontal annular extension (148) axially extending the tubular envelope (141) so as to form an interior zone (170).
- the front annular extension (148) is provided with notches (149) at each coil (130) to allow the winding wire (131) to reach the inner zone (170) from the coil body (140) and vice versa.
- the notches (149) can extend angularly over a significant portion of the coil body (140), the two wires (131) constituting the ends of the coil (130) passing through the front annular extension (148) in the same notch (149).
- the notch (149) then provides a zone of maximum transverse movement of the wires (131), but any other alternative is envisaged, such as that for example shown in at 9 where the wires are guided into individual notches to wedge them transversely.
- each coil (130) has a pair of wires (131) passing through the frontal annular extension (148) of the tubular casing (141).
- the winding of the teeth is carried out by a single continuous wire, successively running through the coils and forming loops inside the inner zone (170), where the wire surrounds interconnection support pads (650).
- These support pads (650) are constituted by protuberances formed on the surface of the transverse disc partition (151) or can also extend from a conductive track (610, 620, 630) making it possible to achieve both the turning back of the wire and its electrical connection to the conductive track by a welding operation removing its insulating layer.
- the winding needle drives the winding wire (131) from the coil (130) that has just been wound towards the surface of the transverse disc partition (151) by passing through a notch (149) made in the tubular casing (141).
- the needle then reaches a support pad (650), which it goes around, then drives the wire again towards the periphery to start winding the next coil.
- all of the support pads (650) are distributed on a circle located between two conductive tracks (620, 630), so when the wire reaches the inner zone (170) to be connected to the conductive track (630) inscribed in the distribution circle of the support pins (650), it goes around a metal support pad extending the conductive track (630) so as to provide the mechanical guidance and electrical contact functions in a single piece.
- the metal support pins (650) are in the form of a “V” whose leaves are made up of folded sections of the metal track, the wire passes through the groove formed by this “V” and makes the turnback by winding itself around one of the leaves. During the electric welding operation, the leaves can be slightly folded down to improve the electrical contact.
- the electrical connection means (660) of the other tracks are in the same form as the metal support pins, the wire simply passing through the groove formed by the two leaves to go around the appropriate support pin.
- the motor has three phases, resulting in an interconnection of the coils for groupings via a connection assembly (600) formed of three conductive tracks (610, 620, 630) cut from the same conductive sheet and folded to constitute the support pins (650) and electrical connection or the electrical connection means (660).
- a connection assembly 600 formed of three conductive tracks (610, 620, 630) cut from the same conductive sheet and folded to constitute the support pins (650) and electrical connection or the electrical connection means (660).
- the conductive tracks (610, 620, 630) are deposited on the transverse disc partition (151) before winding. They are fixed on the transverse disc partition (151) by riveting on the pins (154) and positioned angularly by the ribs (158) which also ensure a raising of the winding wire, to prevent the wire from coming into contact with the conductive tracks (610, 620, 630) and causing a short circuit when it is accidentally stripped or delaminated. It may be noted that the notches (149) also make it possible to ensure a raising of the wire by constituting an axial support.
- the wire (131) alternately passes through the coils (130) and the connection assembly (600) during winding by an automaton, without breaking the wire.
- the wire (131) is anchored at a starting point (640) consisting of a flared shape in which the start of the wire is engaged and held by wedging. It then passes radially through the frontal annular extension (148) through a notch (149) provided, and then winds onto a first coil body (140) formed by the overmolding of a first tooth (120), before radially joining the transverse disc partition (151) by passing again through a notch (149) of the frontal annular extension (148).
- a starting point (640) consisting of a flared shape in which the start of the wire is engaged and held by wedging. It then passes radially through the frontal annular extension (148) through a notch (149) provided, and then winds onto a first coil body (140) formed by the overmolding of a first tooth (120), before radially joining the transverse disc partition (151) by passing again through a notch (149) of the frontal annular extension (148).
- the wire (131) then winds the second tooth, before radially joining the inner zone (170) by passing again through a notch (149) of the frontal annular extension (148). Inside the inner zone (170), it joins the central part by possibly engaging in the groove of an electrical connection means (660), goes around a support pad (650), before returning radially towards another coil (130) adjacent to the previous one; and so on.
- the electrical connection to the conductive tracks (610, 620, 630) can, without great importance, take place upstream, downstream or at the same time as bypassing the support pin (650).
- the wire (131) passes through the frontal annular extension (148) before and after each coil (130).
- the wire (131) passes through the frontal annular extension (148) only to ensure the connections between a coil and a track (610, 620, 630), but not for the direct connections of two coils (130), in order to reduce the passages and therefore the number of electrical welds made.
- the coil bodies (140) are grooved so as to guide the wires and facilitate winding; this is particularly interesting in the case of winding wires of large section and therefore of great rigidity.
- the lower surface of the transverse disc partition (151), located in the cylindrical cavity (250) receiving the rotor (200), has stiffening ribs (171).
- stiffening ribs (171) extend to the front and/or rear surface of the transverse disc partition (151) to stiffen this transverse disc partition (151) and avoid the risk of warping due to, for example, torsional forces exerted by the rotor axis on the axial sleeve (152).
- These stiffening ribs (171) may extend radially or have geometries adapted to avoid warping of this transverse disc partition (151).
- stiffening ribs (171) can also help to improve the transfer of plastic material from an injection point to the entire volume of the part.
- the stator assembly (100) is formed by plastic injection in a mold for overmolding the ferromagnetic teeth (100).
- the transverse dimension of the transverse disc partition (151) causes a shrinkage phenomenon during crystallization and cooling of the part after overmolding, which can lead to deformation of the tubular casing (141) and by extension of the overmolded stator support (150), between one of the ends which is open, and the other end closed by the transverse disc partition (151) and subjected to centripetal forces causing a slight conicity.
- This conicity alters the geometry of the overmolded stator support (150), resulting in the fact that the front surfaces of the teeth may no longer come into optimal contact with the ferromagnetic stator crown (110) on the one hand, and/or degrade the constancy of the magnetic air gap between the teeth and the rotor, or even cause breakages which may lead to guidance or sealing defects.
- the invention proposes to provide deformable zones (159) at the periphery of the transverse disc septum (151), at its connection with the tubular envelope (141).
- These deformable zones (159) can result from an annular alignment of slots (175), preferably arranged between two consecutive teeth (120), alternating with arms angularly centered on a tooth (120).
- These deformable zones (159) can also be made up of oblique arms arranged with a constant angular pitch, to allow, in the event of withdrawal of the transverse disc septum, a slight angular displacement of the central zone relative to the tubular envelope (141).
- These oblique arms connect a zone of the tubular envelope (141) centered on a tooth (120) to a point angularly offset by 10 to 40° from the periphery of the central zone of the transverse disc septum (151).
- the deformable zones (159) preferably extend in the extension of the stiffening ribs (171). Indeed, the deformable zones must make it possible to absorb the contraction deformations of the transverse disc partition (151), while the stiffening ribs (171) must avoid out-of-plane deformations of said transverse disc partition (151), geometries are therefore compatible to meet these two functions with a single part, for example a rectangular beam extending radially can have good deformation capabilities in compression or in tangential bending while resisting axial bending.
- the alternation of lights (175) and deformable zones (159) on the periphery of the transverse disc partition (151) also makes it possible to create weakening zones between the teeth (120), allowing a slight angular movement of said teeth (120) by the elastic deformation of the overmolding.
- This weakening can also be obtained or accentuated by axial grooves (146) formed in the outer periphery of the tubular casing (141) at the center of the notches (135).
- This angular play has, surprisingly, the effect of avoiding transmitting to the stator crown (110) the transverse forces resulting from the periodic interaction between the magnets and the teeth, a source of noise.
- the stator assembly (100) is fixed to a support or to a housing by means of extensions (145) of the overmolded stator support (150).
- These extensions (145) are located in an angular zone delimited by the peripheral angular sectors (142) and preferably along a radius passing through the center of a tooth (120).
- the extensions are not located in a free angular sector (143) located between two consecutive teeth.
- the extensions may nevertheless be located in a radius between the wound part of a tooth and the transverse disc partition (151) or on the external periphery of a tooth (120), for example above the stator crown (110). This arrangement makes it possible not to clutter the inter-tooth space, i.e. the free angular sectors (143), so as to facilitate the winding operation.
- the attachment to the support is carried out by anchoring means (157) by the intervention of forms of riveting pins or plastic riveting extending the extensions (145) in the axial direction.
- the extensions (145) can also extend radially in the form of ears pierced with an eyelet or having a threaded bore acting as an anchoring means (157).
- This second example is an alternative embodiment which differs from the example previously described by the fact that the transverse disc partition (151) has a sealed interior zone (170).
- the other characteristics previously described generally apply to this second example embodiment and variations are explained in the following paragraphs. This alternative embodiment is to be observed with regard to figures 7 to 11.
- the transverse disc partition (151) has two concentric rings (161, 162), forming a frontal annular partition (160), located at the inner periphery of the deformable zones (159), defining between them an annular groove (163).
- the rings (161, 162) are indented by radial slots (164, 165) respectively to allow the radial passage of the wires (131) of the coils (130) and their guidance at the time of winding the stator support (150).
- the top of the peripheral ring (162) has anchoring housings (166) for the engagement of positioning hooks and attachment of a deformable indented toric part (180), for example made of elastomer.
- This toric part (180) has a lower part formed of two coaxial lips (181, 182), straddling said peripheral crown (162), the lip (182) being inserted into the annular groove (163), and an indented upper part being locally crossed by the radial wires of the coils (130), the width of the indentation slots being less than the section of the winding wire (131) to ensure watertight pinching of the wire.
- This toric part (180) has on either side of each indentation slot a cavity opening onto the adjacent slot to allow filling with glue or resin ensuring sealing after insertion of the winding wires (131).
- the bottom of the slots (165) of the peripheral crown (162) each have a projection of the same width as the cavities to form a support for the winding wire (131) and prevent it from causing shearing of the bottom of the toric part (180) during winding and a potential loss of sealing of the front annular partition (160).
- the sealing of the inner zone (170) is perfect by an additional seal (800), for example made by depositing a glue or silicone, placed between the periphery of the front annular partition (160) and the transverse part (300).
- the annular configuration of the toric part (180) makes it possible to deposit this seal (800) on its entire upper face in a single continuous dosage so as to ensure perfect sealing while limiting its production cost.
- the transverse part (300) has an annular protrusion (320) of a shape complementary to that of the frontal annular partition (160), or to the toric part (180) covering it, to ensure a sealed peripheral barrier of the interior zone (170).
- the annular groove (163) between the rings (161, 162) could be filled by a deposit of glue or silicone that can be driven inside the slots (164, 165) by piston effect during assembly with the transverse part (300) thanks to a shape complementary to said space and located on said transverse part.
- This second solution would nevertheless be more expensive because it would require a much larger deposit of glue, a material known to be expensive.
- Other alternatives would be the deposit of a crown of resin or silicone on the stripped area of the wires (131), or even that the peripheral ring does not surmount the surface of the stator support, but is a frontal annular partition formed on the lower surface of the transverse part (300).
- the cross piece (300) has in its upper part a housing to accommodate the electronic card (800), this housing is closed by a ca300pot (500), for example metallic.
- stator ring (110) is put in place by an axial insertion, so that the outer surface of the teeth (120) comes into mechanical and magnetic contact with the inner surface of the stator ring (110) to ensure the closing of the magnetic flux.
- the stator ring (110) is then held in position by the flexible extensions (156).
- part or all of the extensions (145) have an anchoring means (157) ensuring the connection by riveting with the transverse part (300).
- the winding method differs in several points, first the wire must pass through the rings (161, 162) through the slots (164, 165) to reach the inner area (170) containing the conductive tracks (610, 620, 630).
- This embodiment also differs in that the support pads (650) are all folded extensions of the conductive tracks (610, 620, 630).
- Each support pad (650) is associated with an electrical connection means (660) in the form of a deformable lug which is folded back, after the passage of the wire (131), against the wire (131) surrounding the support pad (650) to provide a welding point locally removing the insulation coating of the wire.
- the support pads (650) and the electrical connection means (660) are produced by local deformations of the metal track (610, 620, 630).
- the shaft (350) can alternatively be rigidly connected to the transverse disc partition (151), the rotor rotating around the shaft (350) by means of bearings (230, 240) integrated in housings of the rotor (200).
- the central shaft is fixedly mounted in a guide nose (330) of the transverse part (300) which is inserted into the axial sleeve (152) of the transverse disc partition (151).
- the transverse disc partition (151) ensures a role of centering the rotor (200) relative to the stator.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
- Un accrochage de l’ensemble statorique, voire du moteur dans son ensemble,
- Et, dans certaines variante, une butée de la couronne statorique ferromagnétique.
- un ensemble statorique (100),
- un rotor (200),
- un flasque de guidage (190).
Claims (16)
- Moteur électrique comportant un stator (100) comprenant une pluralité de dents (120) radiales constitués par des paquets de tôles ferromagnétiques et surmoulées pour former un support statorique surmoulé (150), ledit support statorique (150) présentant entre chaque dent (120) une encoche (135) prévue pour accueillir le fil (131) d’une bobine électrique (130), une partie au moins desdites dents (120) surmoulées étant entourées par une bobine électrique (130) après surmoulage du paquet de tôle ferromagnétique la constituant, ledit support statorique (150) présentant, à l’extrémité frontale des dents, une enveloppe tubulaire (141) délimitant une cavité cylindrique (250) pour recevoir un rotor (200),
caractérisé en ce que ledit support statorique surmoulé (150) est fermé au moins partiellement par une cloison discale transversale (151) présentant un manchon axial (152) de centrage de l’arbre (350) du rotor (200), et en ce que la surface extérieure de ladite cloison discale transversale (151), opposée à la cavité cylindrique (250) du rotor (200), présente des moyens de fixation mécanique d’au moins un des éléments électriques constitué par :- les pistes conductrices (610, 620, 630) d’interconnexion des fils des bobines et/ou
- la carte électronique (400) et/ou
- les plots d’appui (650) pour le rebroussement du fil de bobinage.
- Moteur électrique selon la revendication 1 caractérisé en ce que le support statorique (150) est constitué par paquet de tôles ferromagnétique unique présentant une pluralité de dents (120) radiales, ledit support statorique (150) surmoulé étant entourée par une couronne statorique (110) ferromagnétique et en ce que les bobines électriques (130) sont formées d’un fil (131) enroulé sur lesdites dents (120) surmoulées dudit paquet de tôles ferromagnétique unique.
- Moteur électrique selon la revendication 1 caractérisé en ce que ledit manchon axial (152) de centrage est formé par un col tubulaire à fond fermé.
- Moteur électrique selon la revendication 1 caractérisé en ce que ledit manchon axial (152) de centrage est formé par un col tubulaire à fond ouvert.
- Moteur électrique selon l’une quelconque des revendications 1 à 3 caractérisé en ce que ledit manchon axial (152) de centrage est apte à recevoir un roulement (230) de guidage de l’arbre (350) dudit rotor (200).
- Moteur électrique selon l’une quelconque des revendications 1 à 3 caractérisé en ce que ledit manchon axial (152) de centrage comporte un pallier lisse de guidage de l’arbre (350) dudit rotor (200).
- Moteur électrique selon l’une quelconque des revendications 1 à 3 caractérisé en ce que ledit manchon axial (152) de centrage comporte un passage traversé par l’arbre (350) dudit rotor (200).
- Moteur électrique selon la revendication 1 caractérisé en ce que ladite cloison discale transversale (151) est reliée à l’enveloppe tubulaire (141) du support statorique (150) par une pluralité de zones déformables (159).
- Moteur électrique selon la revendication précédente caractérisé en ce que lesdites zones déformables (159) se présentent sous la forme de bras de liaison inclinés par rapport au rayon.
- Moteur électrique selon la revendication 8 caractérisé en ce que lesdits bras de liaison sont liés à l’enveloppe tubulaire (141) du support statorique (150) dans une zone centrée sur une dent.
- Moteur électrique selon la revendication 1 caractérisé en ce que le support statorique (150) présente des moyens d’ancrage (157) situés entre deux encoches (135) consécutives.
- Moteur électrique selon la revendication précédente caractérisé en ce que lesdits moyens d’ancrage (157) sont constitués d’œillets de fixation situés dans des prolongements (145) radiaux du support statorique (150).
- Moteur électrique selon la revendication précédente caractérisé en ce que lesdits moyens d’ancrage (157) sont constitués par des plots axiaux.
- Moteur électrique selon la revendication 1 caractérisé en ce que ladite enveloppe tubulaire (141) présente entre chaque dent (120) une rainure axiale (146) d’affaiblissement pour permettre un débattement élastique angulaire desdites dents de part et d’autre du plan radial de référence.
- Moteur électrique selon la revendication 1 caractérisé en ce que la surface intérieure de ladite cloison discale transversale (151), refermant la cavité cylindrique (250) du rotor (200), présente des nervures de raidissement (171) pour éviter un voilage de la cloison discale transversale (151).
- Moteur électrique selon la revendication précédente et de la revendication 8 caractérisé en ce que les bras de liaison constituants les zones déformables (159) sont des prolongements des nervures de raidissement (171).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020267000400A KR20260021037A (ko) | 2023-06-09 | 2024-06-07 | 조립성이 개선된 전기 모터 |
| CN202480038335.4A CN121444313A (zh) | 2023-06-09 | 2024-06-07 | 具有改进的组装的电动马达 |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2305861A FR3149732B1 (fr) | 2023-06-09 | 2023-06-09 | Moteur électrique à assemblage amélioré |
| FRFR2305861 | 2023-06-09 | ||
| FR2405931A FR3149736A1 (fr) | 2023-06-09 | 2024-06-05 | Moteur électrique à assemblage amélioré |
| FRFR2405931 | 2024-06-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024251954A1 true WO2024251954A1 (fr) | 2024-12-12 |
Family
ID=91432515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/065747 Pending WO2024251954A1 (fr) | 2023-06-09 | 2024-06-07 | Moteur électrique à assemblage amélioré |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20260021037A (fr) |
| CN (1) | CN121444313A (fr) |
| WO (1) | WO2024251954A1 (fr) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003081755A1 (fr) | 2002-03-26 | 2003-10-02 | Ebm Werke Gmbh & Co. Kg | Stator pour moteurs electriques comprenant un systeme d'interconnexion d'enroulement |
| DE20221481U1 (de) * | 2001-07-17 | 2006-01-12 | Ziehl-Abegg Ag | Außenläufermotor |
| US20120098363A1 (en) | 2010-10-20 | 2012-04-26 | Armin Elser | Insulating retaining element for phase potential bars |
| EP2557665B1 (fr) * | 2011-08-10 | 2014-01-15 | ebm-papst Mulfingen GmbH & Co. KG | Stator pour un moteur électrique |
| DE102012023477A1 (de) * | 2012-11-28 | 2014-05-28 | Ziehl-Abegg Se | Schaltelement für einen Elektromotor, Stator mit einem solchen Schaltelement und Elektromotor |
| US20150333589A1 (en) * | 2012-12-18 | 2015-11-19 | Spal Automotive S.R.L. | Electrical machine |
| DE112015002671T5 (de) * | 2014-10-14 | 2017-02-16 | Aisin Seiki Kabushiki Kaisha | Stator |
| DE102016224526A1 (de) * | 2016-12-08 | 2018-06-14 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Stator einer elektrischen Maschine, elektrische Maschine sowie Verlege- und Kontakteinrichtung für eine elektrische Maschine |
| US10243434B2 (en) | 2014-06-30 | 2019-03-26 | Nidec Motor Corporation | Stator with overmolded core and mold for producing same |
| US20200195079A1 (en) * | 2016-10-14 | 2020-06-18 | Robert Bosch Gmbh | Method for electrically contact-connecting a winding of an electrical machine to a printed circuit board |
| US20230053832A1 (en) * | 2019-06-19 | 2023-02-23 | Delta Electronics, Inc. | Motor |
-
2024
- 2024-06-07 WO PCT/EP2024/065747 patent/WO2024251954A1/fr active Pending
- 2024-06-07 CN CN202480038335.4A patent/CN121444313A/zh active Pending
- 2024-06-07 KR KR1020267000400A patent/KR20260021037A/ko active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20221481U1 (de) * | 2001-07-17 | 2006-01-12 | Ziehl-Abegg Ag | Außenläufermotor |
| WO2003081755A1 (fr) | 2002-03-26 | 2003-10-02 | Ebm Werke Gmbh & Co. Kg | Stator pour moteurs electriques comprenant un systeme d'interconnexion d'enroulement |
| US20120098363A1 (en) | 2010-10-20 | 2012-04-26 | Armin Elser | Insulating retaining element for phase potential bars |
| EP2557665B1 (fr) * | 2011-08-10 | 2014-01-15 | ebm-papst Mulfingen GmbH & Co. KG | Stator pour un moteur électrique |
| DE102012023477A1 (de) * | 2012-11-28 | 2014-05-28 | Ziehl-Abegg Se | Schaltelement für einen Elektromotor, Stator mit einem solchen Schaltelement und Elektromotor |
| US20150333589A1 (en) * | 2012-12-18 | 2015-11-19 | Spal Automotive S.R.L. | Electrical machine |
| US10243434B2 (en) | 2014-06-30 | 2019-03-26 | Nidec Motor Corporation | Stator with overmolded core and mold for producing same |
| DE112015002671T5 (de) * | 2014-10-14 | 2017-02-16 | Aisin Seiki Kabushiki Kaisha | Stator |
| US20200195079A1 (en) * | 2016-10-14 | 2020-06-18 | Robert Bosch Gmbh | Method for electrically contact-connecting a winding of an electrical machine to a printed circuit board |
| DE102016224526A1 (de) * | 2016-12-08 | 2018-06-14 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Stator einer elektrischen Maschine, elektrische Maschine sowie Verlege- und Kontakteinrichtung für eine elektrische Maschine |
| US20230053832A1 (en) * | 2019-06-19 | 2023-02-23 | Delta Electronics, Inc. | Motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN121444313A (zh) | 2026-01-30 |
| KR20260021037A (ko) | 2026-02-12 |
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