WO2022175614A1 - Rotor de machine électrique tournante - Google Patents
Rotor de machine électrique tournante Download PDFInfo
- Publication number
- WO2022175614A1 WO2022175614A1 PCT/FR2022/050136 FR2022050136W WO2022175614A1 WO 2022175614 A1 WO2022175614 A1 WO 2022175614A1 FR 2022050136 W FR2022050136 W FR 2022050136W WO 2022175614 A1 WO2022175614 A1 WO 2022175614A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housings
- rotor
- row
- housing
- central housing
- Prior art date
Links
- 238000003475 lamination Methods 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 16
- 239000012809 cooling fluid Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 210000002105 tongue Anatomy 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000001143 conditioned effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 101100063818 Caenorhabditis elegans lig-1 gene Proteins 0.000 description 1
- 101100224228 Mus musculus Lig1 gene Proteins 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Definitions
- the present invention relates to rotating electrical machines, motors or generators, and more particularly the rotors of such machines.
- the invention relates to rotors with permanent magnets.
- the invention relates more particularly to synchronous or asynchronous alternating current machines. It relates in particular to traction or propulsion machines for electric (Battery Electric Vehicle) and/or hybrid (Hybrid Electric Vehicle - Plug-in Hybrid Electric Vehicle) motor vehicles, such as individual cars, vans, trucks or buses.
- the invention also applies to rotating electrical machines for industrial and/or energy production applications, in particular naval, aeronautical or wind turbine applications.
- Permanent magnet rotors are generally composed of a rotor mass and permanent magnets of various geometric shapes.
- the rotor mass may comprise a stack of thin cut-out magnetic laminations. It can comprise one or more stacks of sheets stacked on top of each other.
- the permanent magnets can be arranged on the surface, directly facing the air gap or, as a variant, be arranged inside the rotor mass, in housings of the latter, being then said to be “buried” or “embedded”.
- the rows are arranged such that two adjacent magnets of two consecutive poles are parallel to each other and two magnets of two rows are also parallel to each other.
- the invention aims to meet this need and thus has as its object, according to one of its aspects, a rotor of a rotating electrical machine, a rotor mass comprising laminations stacked on top of each other, the rotor mass comprising a plurality of housings, at least part of the housings, see all the housings, receiving one or more permanent magnets defining poles of the rotor, the housings of a pole being arranged in at least a first and a second row of housings, the first row of housing comprising three housings arranged in a U, with a central housing and two lateral housings, a length of a largest rectangle inscribed in the central housing being equal to +/- 20% of the length of the largest rectangle inscribed in a lateral housing , at least one of the side housings, in particular the two side housings of the first row, comprising a recess which extends from the side housing towards the central housing.
- the presence of two rows of housings makes it possible to increase the number of magnets received in the rotor mass, and thus to increase the resulting power density. It is thus possible to obtain more torque with the same rotor size.
- the invention advantageously makes it possible to improve the reluctant torque of the machine.
- the 'length' is measured along the axis of the row of slots. We speak of 'width' to designate the dimension perpendicular to the length in the plane of a transverse section of the rotor mass.
- the length of the largest rectangle inscribed in the central housing may be equal to +/- 20% to the length of the largest rectangle inscribed in a side housing, or even to +/- 17%, better still to +/-15%, or even at +/- 10%, even better at +/-7%, or even at +/- 5%.
- the length of the largest rectangle inscribed in a side recess is taken as a reference.
- the length of a second row magnet may be equal to the length of a first row magnet. All the magnets of a pole can have the same length.
- the rotor comprises a first and a second row of housings per pole, being devoid of any additional row.
- the second row can be closer to the air gap than the first row.
- the first row is farther from the air gap than the second row.
- the first row can comprise a central housing and two side housings.
- the two side housings are symmetrical to each other with respect to an axis of the pole.
- the rotor mass may comprise one or more stacks of laminations stacked on top of each other. Each stack of laminations can comprise at least one housing receiving the permanent magnet. In the case where the rotor mass comprises several stacks of laminations stacked on top of each other, the rotor mass may comprise, for a housing, a single or several permanent magnets, for example one permanent magnet per laminations package.
- the width of the largest rectangle inscribed in the central slot can be equal to +/- 50% to the width of the largest rectangle inscribed in a side slot, better at 40%, even better at 30%, or even at +/- 20 %, better at +/-15%, even at +/- 10%, even better at +/- 7%, even at +/- 5%.
- the width of the largest rectangle inscribed in a side recess is taken as a reference.
- the width B of the central housing can be equal to the width B of a side housing.
- the width A of a housing of the second row can be less than the width B of a housing of the first row.
- a (BA)/B ratio can be between 0 and 40%, better between 5 and 35%, or even between 10 and 30%, being for example of the order of 25%.
- the width A of a slot in the second row may be equal to the width B of a slot in the first row. All the housings of a pole can have the same width A.
- the number of sizes of permanent magnets required can be advantageously reduced to two or three at most, or even to only one.
- the side pockets of the first row can be provided with permanent magnets.
- the permanent magnets of the side housings of the first row can be identical to each other. They may in particular have the same size in cross section.
- the central housing of the first row can be provided with one or more permanent magnets, or, as a variant, be devoid of them.
- the rotor can advantageously allow a certain modularity for the resulting machine.
- the center housing of the first row can be provided with a permanent magnet of the same size as the permanent magnets of the side housings.
- the central housing of the first row can be provided with a smaller permanent magnet than the permanent magnets of the side housings. This is advantageous from an electromagnetic point of view. Indeed, the permanent magnet being smaller than the housing, there is a part of the housing which happens to be empty on the sides of the magnet, which empty part makes it possible to reduce electromagnetic leakage.
- the central housing of the first row is empty.
- the housings of the second row may be arranged in a V.
- the second row may in particular comprise two housings arranged in a V. They may be symmetrical to one another with respect to an axis of the pole.
- all the housings of the second row are provided with permanent magnets.
- the V configuration of the second row saves space and avoids any risk of saturation of the magnetic circuit.
- the housings of the second row are empty, being devoid of magnets.
- the second row permanent magnets can be identical to each other. They may in particular have the same size in cross section.
- the permanent magnets of the second row can have a different size from the permanent magnets of the first row, being for example smaller.
- An angular opening a3 of the second row can be greater than or equal to twice the sum of the angular opening al between two consecutive poles and the angular opening a2 between the first and second rows.
- the angular openings are measured on the surface of the rotor, at the level of the air gap, for a given pole of the rotor.
- k is equal to 34.6%.
- An angle a4 between the adjacent housings of two consecutive poles can be strictly greater than 0, being in particular between 5° and 35°, better still between 12° and 30°, being for example 24.8° in one embodiment.
- a strictly positive angle a4 increases the saliency torque. The choice of the value of the angle a4 makes it possible to improve the resulting torque.
- the angle a4 may in particular be less than 55°, better still less than 50°, better still less than 40°, being in particular less than 35°.
- the two adjacent housings considered for the measurement of the angle a4 between the two consecutive poles are housings of the first row.
- Each lateral housing of the first row forming with the central housing a bridge of material, the two bridges of material each having a longitudinal axis, the two axes being parallel to each other. This makes it possible to improve the mechanical strength and to obtain a better mechanical behavior to withstand the centrifugal force.
- the axes of the material bridges can be parallel to an axis of the pole of the rotor.
- the recess may be configured to project radially from the central housing.
- the recess may protrude radially from the central housing by a distance Y of between 0 mm and twice the width of the central housing. This protrusion can make it possible to increase the path of the magnetic flux, which makes it possible to reduce flux leaks. It thus makes it possible to increase the reluctance because the path of the flux is lengthened while reducing the leakage flux.
- the radial projection of the recess of the first row of housings can advantageously be associated with bridges of material between the side housings and the central housing which may be straight.
- the bridges of material between the lateral housings and the central housing may in particular extend along an axis which may be rectilinear.
- the two axes of the two material bridges of the first row can be parallel to each other. They can extend substantially radially. These axes may be parallel to the edges of the central housing.
- Such a configuration can make it possible to reduce the leakage fluxes and thus increase the electromotive force, as well as to increase the reluctance of the magnetic circuit and the torque, while increasing the mechanical strength of the material bridges.
- the torque can for example be increased by 200 rpm.
- a width X of the recess can be between 0 mm and twice the width B of the central housing.
- the length Z of the recess can be between once the width B of the central housing and twice the latter.
- This material bridge has a minimum width conditioned by the mechanical strength constraints. Its width is substantially equal to at least the thickness of the magnetic sheet.
- a radial dimension W between the bottom of the second row and the first row can be between once the width B of the central housing and three times the latter.
- the recess may have an edge that extends at least partially parallel to an edge of the central housing.
- At least one housing may include at least one abutment for holding the permanent magnet intended to be received in the housing.
- Each housing may include a stop located towards the air gap.
- the housings are each separated from the air gap by a material bridge whose width is conditioned by the mechanical strength constraints. Their width is substantially equal at least to the thickness of the magnetic sheet. The length of these bridges is substantially equal to the width of the housings.
- the side housings can also include a stop located towards G obviously, for the maintenance of the permanent magnet.
- the rotor may be devoid of circulation of cooling fluid in the housings.
- the recesses are not configured to allow the circulation of a cooling fluid.
- a further subject of the invention is a rotating electrical machine rotor, comprising a rotor mass comprising laminations stacked on top of each other, the rotor mass comprising a plurality of housings, at least one part of the housings, see all the housings, receiving one or more permanent magnets defining poles of the rotor, the housings of a pole being arranged in at least a first and a second row of housings, the first row of housings comprising three housings arranged U-shaped, with a central housing and two lateral housings, a length L2 of a largest rectangle inscribed in the central housing being equal to +/- 20% to the length L1 of the largest rectangle inscribed in a lateral housing, at least one of the side housings, in particular the two side housings of the first row, comprising a recess which extends from the side housing towards the central housing, each log lateral element of the first row providing with the central housing a bridge of material, the two bridges of
- the rotor mass of the rotor may be composed of a plurality of packages arranged consecutively along an axis of rotation of the rotor, two consecutive packages being angularly offset around the axis of rotation of the rotor by an elementary angle 0r.
- the rotor may in particular comprise a first stack of laminations and a second stack of laminations.
- Such a rotor is said to be 'twisted'.
- the rotor can advantageously be twisted, particularly in the case where the stator comprises a full-pitch winding.
- the invention can make it possible to reduce the number of packages necessary for the rotor. When the rotor is twisted, the reduction of torque ripples can be further improved.
- the rotor may not be twisted. We then speak of a so-called ‘straight’ rotor.
- the rotor may advantageously be straight, particularly in the case where the stator comprises a fractional-pitch winding.
- At least one of the laminations of the rotor mass may comprise a plurality of notches on the surface of the rotor mass facing the air gap.
- the notches of the rotor can all be identical or different. They may differ, for example, in their size and/or in their shape.
- the notches of the rotor can be provided facing the air gap, on the surface of the rotor or slightly buried.
- the notches of the rotor can be identical to or different from the notches of the stator.
- At least one notch of the rotor may have a shape, in the plane of the sheet, chosen from the following list, which is not exhaustive: partially circular, semi-circular, oblong, partially elliptical, polygonal, square, rectangular, rectangular with or without rounded corners, triangular, trapezoidal, dovetail, V-shaped or W-shaped.
- the notch comprises a partially circular portion, for example semi-circular
- its radius of curvature may be between 0.1 and 4 mm, better still between 0.36 and 3 mm, or even between 0.63 and 2 mm. , being for example of the order of 0.36 mm or 0.4 mm or 0.6 mm or 0.63 mm or 0.8 mm or 0.9 mm or 1 mm or 1 .2 mm or 1.26 mm or 1.4 mm or 1.6 mm or 1.8 mm.
- the radius of curvature of a rounded corner can be less than half the width of a notch, measured circumferentially in the plane of the sheet.
- the radius of curvature of a rounded corner may be less than or equal to at least half the width ar of a notch and its depth br, measured radially in the plane of the sheet, i.e. min (br, ar/ 2).
- At least one notch of the rotor may comprise a partially circular or even semi-circular portion, its radius of curvature R being between 0.4 e and 8 e, better still between 0.7 e and 4 e, being for example of the order of e, where e designates the width of the air gap of the machine comprising the stator.
- At least one notch of the rotor can have a depth br, measured radially in the plane of the sheet, less than its width ar, measured circumferentially in the plane of the sheet.
- the depth, measured radially in the plane of the sheet can be greater than the width of the notch of the rotor, measured circumferentially in the plane of the sheet.
- the notches of the laminations of a first pack of the rotor mass can be angularly offset with respect to the notches of the laminations of a second pack of the rotor mass.
- the rotor mass may comprise at least two stacks of laminations, or even at least three or four stacks. It can for example comprise two, three or four packs of sheets. The first and second packs of sheets can be consecutive.
- the laminations of a stack of rotor laminations can all be identical to each other.
- each stack of laminations of the rotor may be identical between laminations of said stack.
- the plates of two different packages can be identical to each other, being angularly offset or being turned over in order to obtain the angular offset of the notches.
- the sheets of two different packages can be identical to each other, not being returned.
- the two packages with identical sheets may or may not be consecutive. They can for example be separated by a stack of sheets having different sheets.
- identical sheets it is mainly meant that said sheets are identical by the position of the notch(s).
- the sheets of two different packages may be different from each other, the notch or notches not being placed in the same way or possibly having a different shape or size, or the number of notches being different.
- different sheets it is mainly meant that said sheets differ from each other by the position of the notch(s) or by the number of notches.
- two sheets can have a different number of notches.
- the detents are offset relative to a longitudinal axis of the rotor pole, which may be an axis of symmetry for the pole, by an offset angle.
- the sheets may in particular differ from each other by the value of the offset angle.
- the offset angle can be different between a sheet of the first package and a sheet of the second package.
- the angular offset of the notches of two packages of the rotor can form a pattern with a regular offset or not, always in the same direction, or with a change of direction, for example herringbone, V, W, zig-zag.
- the rotor may be devoid of notches on the surface of the rotor mass.
- the surface of the rotor mass can be substantially smooth.
- Another subject of the invention is a rotating electrical machine comprising a stator and a rotor as defined above.
- the machine can be used as a motor or as a generator.
- the machine can be reluctance. It can constitute a synchronous motor or, as a variant, a synchronous generator. As a further variant, it constitutes an asynchronous machine.
- the maximum speed of rotation of the machine can be high, being for example greater than 10,000 rpm, better still greater than 12,000 rpm, being for example of the order of 14,000 rpm to 15,000 rpm , or even 20,000 rpm or 24,000 rpm or 25,000 rpm.
- the maximum speed of rotation of the machine may be less than 100,000 rpm, or even 60,000 rpm, or even even less than 40,000 rpm, better still less than 30,000 rpm.
- the invention may be particularly suitable for high-powered machines.
- the machine may comprise a single inner rotor or, as a variant, an inner rotor and an outer rotor, arranged radially on either side of the stator and coupled in rotation.
- the machine can work alone or be coupled to a gearbox. In this case, it is inserted into a casing which also houses a gearbox.
- the machine has a stator.
- the latter comprises teeth defining notches between them.
- the stator may comprise electrical conductors, at least some of the electrical conductors, or even a majority of the electrical conductors, which may be pin-shaped U or I. Alternatively, the electrical conductors may include round wire.
- the stator can be star or delta connected.
- the machine may comprise a number of poles comprised between 2 and 48, better still between 4 and 24, or even between 6 and 12, being for example 6 or 8.
- Another subject of the invention is a method for manufacturing a rotor of a rotating electrical machine as defined above.
- the method may include the step of introducing longitudinally, along the axis of rotation of the rotor, at least one permanent magnet into the housing.
- the method may first comprise the step consisting in introducing longitudinally at least one permanent magnet into the housing of each stack of laminations, then the step consisting of stacking the stacks of sheets on top of each other, with the permanent magnets in the housings.
- Figure 1 is a schematic and partial view, in cross section, of a rotating electrical machine rotor according to the invention
- Figure 2 is a view similar to Figure 1 without the permanent magnets
- Figure 3 is a view similar to Figure 1
- Figure 4a is a view similar to Figure 2 of an alternative embodiment
- Figure 4b is a view similar to Figure 2 of an alternative embodiment
- Figure 4c is a view similar to Figure 2 of an alternative embodiment
- Figure 4d is a view similar to Figure 2 of an alternative embodiment
- Figure 5 is a view similar to Figure 1 of an alternative embodiment
- Figure 6 is a view similar to Figure 1 of an alternative embodiment
- Figure 7a is a view similar to Figure 1 of an alternative embodiment
- Figure 7b is a view similar to Figure 1 of another sheet of the variant of Figure 7a.
- Figure 8a is a sectional view, schematic and partial, of an alternative rotor embodiment.
- Figure 8b is a sectional view, schematic and partial, of a rotor embodiment variant.
- Figure 8c is a sectional view, schematic and partial, of a rotor embodiment variant.
- a rotor 30 of a rotating electrical machine comprising a rotor mass 33 in which are formed housings 10. Permanent magnets are inserted into each of the housings 10, so as to define poles of the rotor.
- This rotor is intended to be associated with a stator, not shown.
- the magnets are in this example of generally rectangular shape in cross section as illustrated in the embodiments of Figures 1, 5 and 6.
- Each magnet has, in cross section, on the one hand, a first long side and a second long side , opposite the first, and on the other hand, a first short side and a second short side, opposite the first.
- Each housing 10 is delimited by two faces respectively facing the first long side and the second long side of the magnet.
- the housings 10 of a pole are arranged in a first row 11 of housings further from the air gap and a second row 12 of housings closer to the air gap.
- the first row 11 of housings 10 comprises three housings 10 arranged in a U, with a central housing and two lateral housings symmetrical to each other with respect to an axis of the pole P.
- a length L2 of a larger rectangle inscribed in the central housing is in the example described equal to the length L1 of the largest rectangle inscribed in a lateral housing.
- the 'length' is measured along the axis of the row of slots.
- the length L3 is designated as the length of a larger rectangle inscribed in a housing of the second row.
- the width B of the largest rectangle inscribed in the central housing is equal to the width B of the largest rectangle inscribed in a side housing.
- the side housings of the first row 11 are provided with permanent magnets, as is the central housing.
- the permanent magnets of the side housings and the central housing of the first row 11 are identical to each other. In particular, they have the same size in cross-section.
- Each lateral housing of the first row forms a bridge of material with the central housing, the two bridges of material each having a longitudinal axis, the two axes being parallel to each other.
- the two side housings of the first row 11 include a recess 15 which extends from the side housing towards the central housing.
- the recess 15 is configured to project radially from the central housing by a distance Y.
- the recess 15 has a width X and a length Z.
- the recess 15 has an edge which extends at least partially parallel to an edge of the central housing.
- the second row 12 comprises two housings arranged in a V. They are symmetrical to each other with respect to an axis of the pole P. In the example described, all the housings of the second row 12 are provided with permanent magnets .
- the second row permanent magnets are identical to each other. In particular, they have the same size in cross-section. In contrast, the second row permanent magnets are a different size from the first row permanent magnets, being smaller.
- the width A of a slot in the second row is less than the width B of a slot in the first row.
- a radial dimension W between the bottom of the second row and the first row can be between once the width B of the central housing and three times the latter.
- the side housings of the first row 11 as well as the housings of the second row 12 comprise at least one abutment 16 for holding the permanent magnet intended to be received in the housing, this abutment 16 being located towards the air gap.
- the angular opening a3 of the second row 12 is defined. This angular opening a3 is greater than twice the sum of the angular opening al between two consecutive poles and the angular opening a2 between the first and second rows.
- we have a3 1.2*2 (a1+a2).
- the angular openings are measured at the surface of the rotor, at the level of the air gap, for a given pole of the rotor, as shown in Figure 2.
- An angle a4 between the adjacent housings 10 of two consecutive poles is in the example described 24.8°.
- the two adjacent housings considered for the measurement of the angle a4 between the two consecutive poles are housings of the first row.
- angles and angular openings are given.
- the side magnets of the first row 11 make between them an angle b ⁇ of approximately 70°.
- the magnets of the second row 12 form between them an angle b2 of approximately 103°.
- the angular opening a3 of the second row 12 is about 13 mm.
- the angular opening a5 of the first row 11 is about 30 mm.
- a gap D between the two recesses of the side housings of the first row 11 is approximately 15 mm.
- the housings of the second row 12 are elongated at a point so as to reduce the distance W between the bottom of the second row and the first row.
- the recesses 15 of the housings of the first row 12 are shortened, not projecting radially from the central housing.
- the recesses 15 of the housings of the first row 12 are on the contrary elongated, ending in a semicircle.
- the recesses 15 of the housings of the first row 12 are separated from the rest of the housing by a stop 17 for holding the permanent magnet.
- the side housings of the first row 11 are provided with permanent magnets, as is the central housing, these magnets being all identical.
- the central housing of the first row 11 is provided with a permanent magnet smaller than the permanent magnets of the side housings, of length L4 less than the length L1 or the length L2.
- the central housing of the first row may be empty, being devoid of a permanent magnet.
- certain laminations of the rotor comprise deformable tabs 19 which are each connected to one face of the corresponding housing, as illustrated in FIG. 7a, while other laminations of the stack n 'not include, as shown in Figure 7b.
- deformable tabs 19 which are each connected to one face of the corresponding housing, as illustrated in FIG. 7a, while other laminations of the stack n 'not include, as shown in Figure 7b.
- only the side housings of the first rows and the housings of the second rows have such a deformable tongue 19.
- the deformable tongues 19 each extend into the corresponding housing.
- Each deformable tab 19 has a portion which is bent so as to be pressed against a small side of the corresponding magnet.
- the bendable portion of the deformable tongue 19 is bent outside the plane of the sheets, along a folding axis of the deformable tongue 19 extending in a plane parallel to the plane of the sheet.
- the machine has a number of poles of 8.
- this is different, being for example 6.
- the laminations of the rotor mass comprise notches 62 on the surface of the rotor mass facing the air gap.
- the notches are of partially elliptical shape, with a depth br, measured radially in the plane of the sheet, greater than the width ar of the notch 62, measured circumferentially in the plane of the sheet.
- a pole of the rotor has four notches 62 distributed symmetrically on either side of an axis of the pole.
- the notches of a pole are not distributed symmetrically, the notches of the laminations of a first package of the rotor mass are angularly offset with respect to the notches of the laminations of a second package of the rotor mass.
- FIG. 8b a rotor formed of two identical sheets turned over, in order to form two packets 50a, 50b of sheets each comprising two notches 62 angularly offset.
- the rotor comprises four packets 50a, 50b, 50c, 50d, each comprising a single notch 62 angularly offset.
- the notches 62 here differ in their depth.
- the rotor comprises a configuration different from those illustrated, for example by the number of packets, by the position of the notches or their shape or size.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22705437.6A EP4295469A1 (fr) | 2021-02-22 | 2022-01-26 | Rotor de machine électrique tournante |
US18/264,353 US20240120785A1 (en) | 2021-02-22 | 2022-01-26 | Rotor for a rotary electric machine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2101695A FR3120168A1 (fr) | 2021-02-22 | 2021-02-22 | Rotor de machine électrique tournante |
FRFR2101695 | 2021-02-22 |
Publications (1)
Publication Number | Publication Date |
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WO2022175614A1 true WO2022175614A1 (fr) | 2022-08-25 |
Family
ID=76375139
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2022/050136 WO2022175614A1 (fr) | 2021-02-22 | 2022-01-26 | Rotor de machine électrique tournante |
Country Status (4)
Country | Link |
---|---|
US (1) | US20240120785A1 (fr) |
EP (1) | EP4295469A1 (fr) |
FR (1) | FR3120168A1 (fr) |
WO (1) | WO2022175614A1 (fr) |
Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2101695A5 (fr) | 1970-07-14 | 1972-03-31 | Ingersoll Rand Co | |
US20070096578A1 (en) | 2005-10-31 | 2007-05-03 | Jahns Thomas M | Device having permanent-magnet pieces |
US20070096577A1 (en) | 2005-10-31 | 2007-05-03 | Caterpillar Inc. | Electric machine |
US20080007131A1 (en) | 2006-06-12 | 2008-01-10 | Remy International, Inc. | Electric machine with interior permanent magnets |
US20100079026A1 (en) * | 2008-10-01 | 2010-04-01 | Seok-Hee Han | Electric machine |
US20130020889A1 (en) | 2011-07-19 | 2013-01-24 | Aisin Aw Co., Ltd. | Rotating electrical machine |
TWI589097B (zh) * | 2013-07-05 | 2017-06-21 | Aida Eng Ltd | Permanent magnet motor |
CN206650521U (zh) | 2017-03-20 | 2017-11-17 | 牟特科技(北京)有限公司 | 一种永磁电机斜极转子结构及电机 |
KR102018229B1 (ko) | 2018-05-29 | 2019-09-04 | 엘지전자 주식회사 | 전동기의 로터 |
CN110212666A (zh) | 2019-05-16 | 2019-09-06 | 广州小鹏汽车科技有限公司 | 转子冲片结构、定子冲片和电机结构 |
WO2019174323A1 (fr) | 2018-03-16 | 2019-09-19 | 珠海格力电器股份有限公司 | Structure de rotor, moteur à reluctance synchrone auxiliaire à aimant permanent et véhicule électrique |
WO2019179864A1 (fr) | 2018-03-21 | 2019-09-26 | Zf Friedrichshafen Ag | Rotor d'une machine électrique à aimants permanents |
WO2020090152A1 (fr) * | 2018-10-30 | 2020-05-07 | 三菱電機株式会社 | Machine électrique tournante |
FR3094583A1 (fr) * | 2019-03-29 | 2020-10-02 | IFP Energies Nouvelles | Rotor de machine électrique avec pôles asymétriques et aimants latéraux |
US20200395796A1 (en) * | 2019-06-17 | 2020-12-17 | Komotek Co., Ltd. | Rotor for Motor for Reducing Amount of Usage of Permanent Magnets |
-
2021
- 2021-02-22 FR FR2101695A patent/FR3120168A1/fr active Pending
-
2022
- 2022-01-26 EP EP22705437.6A patent/EP4295469A1/fr active Pending
- 2022-01-26 WO PCT/FR2022/050136 patent/WO2022175614A1/fr active Application Filing
- 2022-01-26 US US18/264,353 patent/US20240120785A1/en active Pending
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2101695A5 (fr) | 1970-07-14 | 1972-03-31 | Ingersoll Rand Co | |
US20070096578A1 (en) | 2005-10-31 | 2007-05-03 | Jahns Thomas M | Device having permanent-magnet pieces |
US20070096577A1 (en) | 2005-10-31 | 2007-05-03 | Caterpillar Inc. | Electric machine |
US20080007131A1 (en) | 2006-06-12 | 2008-01-10 | Remy International, Inc. | Electric machine with interior permanent magnets |
US20100079026A1 (en) * | 2008-10-01 | 2010-04-01 | Seok-Hee Han | Electric machine |
US20130020889A1 (en) | 2011-07-19 | 2013-01-24 | Aisin Aw Co., Ltd. | Rotating electrical machine |
TWI589097B (zh) * | 2013-07-05 | 2017-06-21 | Aida Eng Ltd | Permanent magnet motor |
CN206650521U (zh) | 2017-03-20 | 2017-11-17 | 牟特科技(北京)有限公司 | 一种永磁电机斜极转子结构及电机 |
WO2019174323A1 (fr) | 2018-03-16 | 2019-09-19 | 珠海格力电器股份有限公司 | Structure de rotor, moteur à reluctance synchrone auxiliaire à aimant permanent et véhicule électrique |
WO2019179864A1 (fr) | 2018-03-21 | 2019-09-26 | Zf Friedrichshafen Ag | Rotor d'une machine électrique à aimants permanents |
KR102018229B1 (ko) | 2018-05-29 | 2019-09-04 | 엘지전자 주식회사 | 전동기의 로터 |
WO2020090152A1 (fr) * | 2018-10-30 | 2020-05-07 | 三菱電機株式会社 | Machine électrique tournante |
FR3094583A1 (fr) * | 2019-03-29 | 2020-10-02 | IFP Energies Nouvelles | Rotor de machine électrique avec pôles asymétriques et aimants latéraux |
CN110212666A (zh) | 2019-05-16 | 2019-09-06 | 广州小鹏汽车科技有限公司 | 转子冲片结构、定子冲片和电机结构 |
US20200395796A1 (en) * | 2019-06-17 | 2020-12-17 | Komotek Co., Ltd. | Rotor for Motor for Reducing Amount of Usage of Permanent Magnets |
Also Published As
Publication number | Publication date |
---|---|
FR3120168A1 (fr) | 2022-08-26 |
US20240120785A1 (en) | 2024-04-11 |
EP4295469A1 (fr) | 2023-12-27 |
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