WO2022018363A2 - Machine électrique tournante - Google Patents
Machine électrique tournante Download PDFInfo
- Publication number
- WO2022018363A2 WO2022018363A2 PCT/FR2021/051326 FR2021051326W WO2022018363A2 WO 2022018363 A2 WO2022018363 A2 WO 2022018363A2 FR 2021051326 W FR2021051326 W FR 2021051326W WO 2022018363 A2 WO2022018363 A2 WO 2022018363A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor
- packets
- notches
- rotation
- equal
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—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
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
- H02K21/145—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having an annular armature coil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Definitions
- the present invention relates to rotating electrical machines, and more particularly to the rotors of such machines.
- the invention relates in particular to the manufacture of the rotor mass of the rotor, and in particular to the configuration of the latter in the case where it is produced in several packets aligned in the axial direction, for example at least two packets.
- Each of the packets can be offset angularly with respect to the adjacent packets (we speak of “step skew”).
- 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.
- Application EP 2451 049 relates to a process for assembling packets, in which the twist angle is not specified. This application does not disclose fractional winding.
- stator has a full-pitch winding, with an offset of 1.875°.
- stator also comprises a full-pitch winding, with twist depending on the parity of the number of packets.
- Application US 2016/0285336 relates to a rotor comprising several packets, with a twist angle given by a particular relationship. The winding there is fractional.
- the invention aims to meet this need and thus has as its object, according to a first of its aspects, a rotating electrical machine comprising:
- stator comprising teeth and notches between the teeth, electrical conductors being housed in the notches, the electrical conductors forming a fractional winding or an entire winding, the number of teeth and notches Ns possibly being 45, 48 , 54, 60, 63, 72, 81, 84, and more particularly 63 or 48, and
- a rotating electrical machine comprising:
- stator comprising teeth and notches between the teeth, electrical conductors being housed in the notches, the electrical conductors forming a fractional winding, the number of teeth and notches Ns being in particular 63, and
- a rotor comprising a rotor mass and permanent magnets inserted therein, the rotor mass being 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 d, with the elementary angle d included in the following interval:
- the harmonics to be attenuated are thus he-4, he-2, he, he+2, he+4. It is thus possible to reduce the torque ripples, and the level of vibrations in the machine, which makes it possible to reduce the resulting noise.
- the total twist angle ⁇ t is the sum of the elementary angles d between all the consecutive bundles shifted in the same direction around the axis of rotation. If one or more packets are shifted in the other direction, their shift is not counted.
- the total angle ⁇ t is the maximum angle obtained by taking the greatest number of consecutive packets shifted in the same direction.
- n is meant the number of consecutive packets shifted in the same direction around the axis of rotation.
- the rotor can have 6 poles.
- the elementary angle d can be included in the following interval: (360/(25pn)) ⁇ d ⁇ (360/(17pn)).
- the number of packets n is an integer strictly greater than 1, n being able to be equal to 2, 3, 4, 5, 6, 7, 8, this list not being exhaustive.
- the elementary angle d can be equal to 1.5° with 4 bunches.
- the total angle ôt can then be equal to 4.5°.
- the elementary angle d can be equal to 3.1° with 2 packets.
- the total angle ôt can then be equal to 3.1°.
- the number of phases q can be equal to 3, in the case of a three-phase machine, for example.
- b/c which is an irreducible fraction and has a positive integer.
- b/c may equal 1 ⁇ 2.
- the number p of pairs of poles can be a multiple of 3. Such a configuration can make it possible to have a simplified winding. Alternatively, the number p of pole pairs may not be a multiple of 3.
- the rotor may comprise 8 poles.
- the stator can have 60 slots and 60 teeth.
- we can have he 15.
- the elementary angle d can be included in the following interval: (360/(19pn)) ⁇ d ⁇ (360/(1 lpn)).
- the number of packets n is an integer strictly greater than 1, n being able to be equal to 2, 3, 4, 5, 6, 7, 8, this list not being exhaustive.
- the rotor may comprise 6 poles.
- the stator can have 45 slots and 45 teeth.
- the elementary angle d can be included in the following interval: (360/(19pn)) ⁇ d ⁇ (360/(1 lpn)).
- the number of packets n is an integer strictly greater than 1, n being able to be equal to 2, 3, 4, 5, 6, 7, 8, this list not being exhaustive.
- the rotor may comprise 6 poles.
- the stator can have 81 slots and 81 teeth.
- the elementary angle d can be included in the following interval: (360/(3 lpn)) ⁇ d ⁇ (360/(23pn)).
- the number of packets n is an integer strictly greater than 1, n being able to be equal to 2, 3, 4, 5, 6, 7, 8, this list not being exhaustive.
- the rotor can have 8 poles.
- the stator can have 84 slots and 84 teeth.
- the elementary angle d can be included in the following interval: (360/(25pn)) ⁇ d ⁇ (360/(17pn)).
- the number of packets n is an integer strictly greater than 1, n being able to be equal to 2, 3, 4, 5, 6, 7, 8, this list not being exhaustive.
- the invention also relates, independently or in combination with the foregoing, to a rotating electrical machine, comprising:
- stator comprising teeth and notches between the teeth, electrical conductors being housed in the notches, the electrical conductors forming an entire winding, the number of teeth and notches being 48, and - a rotor comprising a rotor mass and permanent magnets inserted therein, the rotor mass being 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 (d), with the elementary angle d included in the following interval:
- the rotor can have 8 poles.
- the machine can be three-phase.
- the stator can have 48 slots and 48 teeth.
- we can have he 12.
- the elementary angle d can be included in the following interval: (360/(17pn)) ⁇ d ⁇ (360/(7pn)), and in particular in the interval 2.25 ⁇ d ⁇ 3, 21.
- the number of packets n is an integer strictly greater than 1, n being able to be equal to 2, 3, 4, 5, 6, 7, 8, this list not being exhaustive.
- Center bundle length may vary. For example, one can have a uniform length of all the bunches, or alternatively, in order to improve the magnetic balance of the rotor, one can choose the length of the central bunch to be twice the length of the side bunches. With 1 being the length of a side bundle, the length of the middle bundle le can be 1 ⁇ le ⁇ 21.
- Noise reduction can be optimized. Choosing a twist angle in the upper part of the range can optimize the reduction of acoustic noise and thus the reduction of torque ripple, which is particularly advantageous when the machine is saturated and the The magnetic state in the n twisted bunches is different. The reduction of induced voltage harmonics is also favored, which is advantageous for facilitating control of the machine.
- the number of slots per pole and per phase Z can be written as a positive integer.
- the stator can have a number of slots per pole and per phase Z equal to 2.
- the elementary angle d may depend on the number of bunches n in the rotor mass.
- Noise reduction can be optimized. Choosing a twist angle in the upper part of the range can optimize the reduction of acoustic noise and thus the reduction of torque ripple, which is particularly advantageous when the machine is saturated and the The magnetic state in the n twisted bunches is different. The reduction of induced voltage harmonics is also favored, which is advantageous for facilitating control of the machine.
- the number of slots per pole and per phase Z can be written as a positive integer.
- the stator can have a number of slots per pole and per phase Z equal to 2.
- the elementary angle d may depend on the number of bunches n in the rotor mass.
- the elementary angle d may be equal to 2.5°, in particular with 4 bunches.
- the total angle ⁇ t may be equal to 1.5°. Good results are thus obtained in terms of reduction of torque ripples and reduction of vibration noise level.
- the rotor may comprise 8 poles.
- the machine can be three-phase.
- the stator can have 72 slots and 72 teeth.
- we can have he 18.
- the elementary angle d can be included in the following interval: (360/(23pn)) ⁇ d ⁇ (360/(13pn)).
- the number of packets n is an integer strictly greater than 1, n being able to be equal to 2, 3, 4, 5, 6, 7, 8, this list not being exhaustive.
- the rotor may comprise 6 poles.
- the machine can be three-phase.
- the stator can have 54 slots and 54 teeth.
- we can have he 18.
- the elementary angle d can be included in the following interval: (360/(23pn)) ⁇ d ⁇ (360/(13pn)).
- n is an integer strictly greater than 1, n possibly being equal to 2, 3, 4, 5, 6, 7, 8, this list not being exhaustive.
- the rotor may comprise 6 poles.
- the machine can be three-phase.
- the stator can have 72 slots and 72 teeth.
- we can have he 24.
- the elementary angle d can be included in the following interval: (360/(29pn)) ⁇ d ⁇ (360/(19pn)).
- the number of packets n is an integer strictly greater than 1, n being able to be equal to 2, 3, 4, 5, 6, 7, 8, this list not being exhaustive.
- the rotor mass may comprise an even number of packets.
- the rotor mass can comprise an odd number of packets.
- the angular offset between two consecutive bunches can be constant when moving along the axis of rotation of the rotor, or alternatively it can vary.
- the packages of the rotor mass can all be angularly offset in the same direction around the axis of rotation of the rotor. As a variant, they can be angularly offset successively in one direction then in the other, being arranged in a V. They can be arranged in a V, being offset symmetrically with respect to a plane of symmetry perpendicular to the axis of rotation of the rotor.
- the rotor mass may comprise a single central packet cut in two by said plane of symmetry.
- the rotor mass can comprise two central packets separated by said plane of symmetry.
- the two central packets may not be angularly offset relative to each other.
- the total number of bunches can be equal to the number n of consecutive bunches shifted in the same direction around the axis of rotation, or alternatively equal to 2n, or else to 2n-1.
- the packets of the rotor mass can be angularly offset successively in one direction and then in the other, being arranged in herringbone pattern.
- the pressure harmonics and the noise levels can be further reduced by twisting on n bunches, in particular herringbone or V-shaped, and by multiplying this pattern r times over the length of the rotor.
- the total number of packets nt is in this case r*n in the case of a simple twist, and r*(2*n) or r*(2*n-1) in the case of a twist in V multiplied r times.
- All rotor packages can each have the same length or different lengths
- two packets may have different lengths.
- the arrangement of the bundles in the rotor mass can be such that the length of the bundles can increase and then decrease as one moves along the axis of rotation, or increase all along the rotor, or decrease all the way. along the rotor.
- the length of the bundles may vary with a sawtooth variation as one moves along the axis of rotation.
- the central packet or packets may have a different length from the other packets, for example a shorter or longer length.
- the rotor may include permanent magnets inserted into the rotor mass.
- the rotor mass may comprise rotor laminations.
- the rotor may comprise permanent magnets, with in particular surface or buried magnets.
- the rotor can be flux concentrating. It may comprise one or more layers of magnets arranged in an I, U or V.
- the housings for the permanent magnets can be produced entirely by cutting in the sheets. Each sheet of the stack of sheets can be monobloc. Alternatively, it may be a wound or squirrel cage rotor, or a variable reluctance rotor.
- the number of pairs of poles p at the rotor is for example between 1 and 24, being for example 1, 2, 3, 4, 5 or 6.
- the diameter of the rotor may be less than 600 mm, or even less than 400 mm, better still less than 300 mm, better still less than 200 mm, and greater than 40 mm, better greater than 60 mm, being for example between 80 and 160 mm.
- Each sheet is for example cut from a sheet of magnetic steel or sheet containing magnetic steel, for example steel 0.1 to 1.5 mm thick.
- the sheets can be coated with an electrically insulating varnish on their opposite faces before they are assembled within the stack. Electrical insulation can still be obtained by heat treatment of the sheets, if necessary.
- the shaft can be made of a magnetic material, which advantageously makes it possible to reduce the risk of saturation in the rotor mass and to improve the electromagnetic performance of the rotor.
- the rotor comprises a non-magnetic shaft on which the rotor mass is arranged.
- the shaft can be made at least in part from a material from the following list, which is not exhaustive: steel, stainless steel, titanium or any other non-magnetic material.
- the rotor mass can in one embodiment be placed directly on the non-magnetic shaft, for example without an intermediate rim.
- the rotor may comprise a rim surrounding the shaft of the rotor and coming to rest on the latter.
- the rotor mass may include one or more holes to lighten the rotor, allow its balancing or for the assembly of the rotor plates constituting it. Holes can allow passage of the tie rods now integral with the sheets.
- Sheets can be cut in a tool one after the other. They can be stacked and clipped or glued into the tool, in complete bundles or sub-bundles. The sheets can be clicked on top of each other. Alternatively, the stack of sheets can be stacked and welded outside the tool.
- the rotor mass may have an outer contour which is circular or multi-lobed, a multi-lobed shape being useful for example to reduce torque ripples or current or voltage harmonics.
- the rotor may comprise at least one flange which may be arranged at one end of the pack of rotor laminations. In one embodiment, the rotor comprises two flanges each disposed at one end of the pack of rotor laminations.
- the rotor can be cantilevered or cantilevered from the bearings used to guide the shaft.
- 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. min, 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 be inserted alone into a casing or inserted into a gearbox casing. 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 in the shape of a U-shaped or I-shaped hairpin.
- the stator may comprise a stator mass comprising the aforementioned teeth and notches.
- the notches can be at least partially closed.
- a partially closed notch makes it possible to create an opening at the level of the air gap, which can be used for example for the establishment of electrical conductors for filling the notch.
- a partially closed notch is in particular made between two teeth which each have pole shoes at their free end, which close the notch at least in part.
- the notches can be completely closed.
- “fully closed notch” is meant notches which are not open radially towards the air gap.
- At least one notch, or even each notch can be continuously closed on the side of the air gap by a bridge of material coming in one piece with the teeth defining the notch. All the notches can be closed on the air gap side by material bridges closing the notches. The material bridges may have come in one piece with the teeth defining the notch. The stator mass then has no cutout between the teeth and the bridges of material closing the slots, and the slots are then continuously closed on the air gap side by the bridges of material coming in one piece with the teeth defining the notch.
- the notches can also be closed on the side opposite the air gap by an added yoke or in one piece with the teeth. The notches are then not open radially outwards.
- the stator mass may have no cutout between the teeth and the yoke.
- each of the notches has a continuously closed contour.
- continuously closed is meant that the notches have a continuous closed contour when viewed in cross section, taken perpendicular to the axis of rotation of the machine. You can go all the way around the notch without encountering a cutout in the stator mass.
- the stator mass can be made by stacking magnetic laminations, the notches being made by cutting the laminations.
- the stator mass can as a variant be produced by cutting in a mass of sintered or agglomerated magnetic powder. The closing of the slots on the side of the air gap is obtained by bridges of material coming from a single piece with the rest of the sheets or the block forming the stator mass.
- the stator may be devoid of added magnetic shims for closing the slots. This eliminates the risk of accidental detachment of these wedges.
- the stator may comprise coils arranged in a distributed manner in the slots, having in particular electrical conductors arranged in a row in the slots. By “distributed”, it is meant that at least one of the coils passes successively through two non-adjacent slots.
- the electrical conductors can form a distributed winding.
- the winding is not concentrated or wound on a tooth.
- the electrical conductors may not be arranged in the notches loosely but in an orderly manner. They are stacked in the slots in a non-random manner, being for example arranged in rows of aligned electrical conductors.
- the stack of electrical conductors is for example a stack according to a hexagonal network in the case of electrical conductors of circular cross-section.
- the stator may include electrical conductors housed in the slots. Electrical conductors at least, see a majority of electrical conductors, can be in the shape of pins, U or I.
- the pin can be U-shaped ("U-pin” in English) or straight, being in form of I ("I-pin” in English).
- Each electrical conductor may comprise one or more strands (“wire” or “strand” in English).
- strand we mean the most basic unit for electrical conduction.
- a strand can be of round cross section, we can then speak of a 'thread', or flat.
- the flat strands can be shaped into pins, for example U or I.
- Each strand is coated with an insulating enamel.
- the electrical conductors can form a single winding, in particular whole or fractional.
- single winding it is meant that the electrical conductors are electrically connected together in the stator, and that the connections between the phases are made in the stator, and not outside the stator, for example in a terminal box.
- a winding is made up of a number of phases m staggered in space in such a way that when they are supplied by a multi-phase current system, they produce a rotating field.
- the winding can be whole or fractional in the invention.
- the winding can be full-pitch with or without shortening, or in a fractional variant.
- the electrical conductors form a fractional winding, in particular with a shortened pitch.
- the number of notches of the stator can be between 18 and 96, better still between 30 and 84, being for example 18, 24, 27, 30, 36, 42, 45, 48, 54, 60, 63, 72, 81 , 92, 96, better being 48 or 60 or 63.
- the number of poles of the stator can be between 2 and 24, or even between 4 and 12, being for example 6 or 8.
- the combination number of notches/number of poles of the stator can be chosen from the combinations of the following list, which is not exhaustive: 30/4, 42/4, 45/6, 48/8, 63/6, 60/8, 84/8.
- the winding can be corrugated.
- the series connection of the electrical conductors can be done in so-called wavy winding.
- wavy winding is meant a winding in which the electrical conductors of the same phase and of the same pole are electrically connected to each other so that, for one winding path, the electric current of the phase circulates in the electrical conductors by rotating around the axis of rotation of the machine, always in one direction.
- the electrical conductors of the same phase and of the same pole do not overlap when observed perpendicular to the axis of rotation of the machine.
- the winding may comprise a single winding path or several winding paths.
- an "electrical conductor” the current of the same phase flows by way of winding.
- winding path is meant all of the electrical conductors of the machine which are traversed by the same electric current of the same phase.
- These electrical conductors can be connected together in series or in parallel or in series-parallel. In the case where there is a single channel, the electrical conductors are connected in series. In the case where there are several channels, the electrical conductors of each channel are connected in series, and the channels are connected in parallel. The electrical conductors can thus form a distributed winding.
- the winding may not be concentrated or tooth wound.
- the stator has a concentrated winding.
- the stator may include teeth and coils disposed on the teeth.
- the stator can thus be wound on teeth, in other words with undistributed winding.
- the stator teeth may include pole shoes.
- the stator teeth are devoid of pole shoes.
- the stator may include an outer carcass surrounding the yoke.
- the stator teeth can be made with a stack of magnetic laminations, each covered with an insulating varnish, in order to limit the losses by induced currents.
- the invention also relates, independently or in combination with the foregoing, to a method of manufacturing a machine as defined above.
- Figure 1 is a perspective view, schematic and partial, of a rotor made in accordance with the invention.
- FIG 2 Fa figure 2 is a perspective view, schematic and partial, of an alternative embodiment.
- FIG 3 Fa figure 3 is a perspective view, schematic and partial, of an alternative embodiment.
- FIG 4 Fa figure 4 is a perspective view, schematic and partial, of an alternative embodiment.
- FIG 5 Fa figure 5 is a perspective view, schematic and partial, of an alternative embodiment.
- FIG 6 Fa Figure 6 is a perspective view, schematic and partial, of an alternative embodiment.
- Figure 7 is a perspective view, schematic and partial, of an alternative embodiment.
- Figure 8 is a perspective view, schematic and partial, of an alternative embodiment.
- Figure 9 is a perspective view, schematic and partial, of an alternative embodiment.
- Figure 10 is a perspective view, schematic and partial, of an alternative embodiment.
- FIG. 1 An inner rotor 1 of a rotating electrical machine, also comprising an outer stator not shown.
- the stator makes it possible to generate a rotating magnetic field for driving the rotor 1 in rotation, in the context of a synchronous motor, and in the case of an alternator, the rotation of the rotor induces an electromotive force in the electrical conductors of the stator .
- the stator has teeth and notches between the teeth, electrical conductors being housed in the notches. Electrical conductors form a fractional or whole winding.
- the number of teeth and notches Ns is for example 63 or 48.
- the rotor 1 represented in FIG. 1 comprises a magnetic rotor mass 3 extending axially along the axis of rotation X of the rotor, this rotor mass being formed by a plurality of packets 5 arranged consecutively along the axis of rotation of the rotor X, namely two consecutive packets in the example of FIG. 1.
- the packets are each composed of magnetic rotor laminations stacked along the X axis, the laminations being for example identical and exactly superposed.
- the magnetic laminations are preferably made of magnetic steel. All grades of magnetic steel can be used.
- Two consecutive bunches are angularly offset around the axis of rotation X of the rotor by an elementary angle d, as shown.
- the elementary angle d is in the example described 1.5°.
- the total angle here is also d.
- the rotor mass can have an even number of packages, as shown in Figure 1.
- the rotor mass may comprise an odd number of packages, as illustrated in FIG. 2, where the rotor comprises three packages 5, all identical, angularly offset by an angle d, all in the same direction around the axis of rotation.
- the angular offset between two consecutive packets is here constant when moving along the axis of rotation of the rotor.
- the total angle here is 2d.
- the rotor comprises four packets 5, all identical, angularly offset by an angle d, all in the same direction around the axis of rotation X of the rotor.
- the angular offset between two consecutive bunches is here constant when moving along the axis of rotation of the rotor.
- the total angle here is 3d.
- the packets 5 can be angularly offset successively in one direction then in the other, being arranged in a V and offset symmetrically with respect to a plane of symmetry S perpendicular to the axis of rotation X of the rotor.
- the rotor mass may comprise a single central packet 5 cut in two by said plane of symmetry S, as illustrated in FIG. 4, with three consecutive packets 5, one of which is central.
- nt 3
- the total angle here is equal to the elementary angle d.
- the rotor mass may comprise two central packets separated by said plane of symmetry S, as illustrated in FIG. 5 with four packets 5, two of which are central, with no angular offset between them.
- the rotor comprises seven consecutive packets 5 arranged in a V, with a central packet.
- the number of packets within the meaning of the invention is 4, that is to say equal to 2n-1, and the total angle is here equal to 3d.
- the rotor mass may comprise two central packets separated by said plane of symmetry S, as illustrated in FIG. 7, with eight packets 5 including two central ones with no angular offset between them.
- the number of packets within the meaning of the invention is 4, and the total angle is here equal to 3d.
- the elementary angle can be 2.5° between bundles, with a total twist angle of 7.5°.
- the machine can have 48 slots and 8 poles.
- the elementary angle may be 1.5° between bundles, with a total twist angle of 4.5°.
- the machine can have 63 slots and 6 poles.
- the length of the rotor mass can be 110 mm, with 4 packages of 27.5 mm.
- the diameter of the rotor mass can be 70.15 mm.
- the elementary angle may be 1.5° between bundles, with a total twist angle of 4.5°.
- the machine can have 63 slots and 6 poles.
- the length of the rotor mass can be 165 mm, with 4 packages of 41.25 mm.
- the diameter of the rotor mass can be 70.15 mm.
- the elementary angle may be 1.5° between bundles, with a total twist angle of 4.5°.
- the machine can have 63 slots and 6 poles.
- the length of the rotor mass can be 192.5 mm, with 4 packages of 27.5 mm.
- the diameter of the rotor mass can be 70.15 mm.
- All of the rotor packages can each be the same length, as shown in Figures 1 through 6.
- two packets can have different lengths, as illustrated in Figure 8.
- the two central packets have a length 12 greater than the length 11 of the other packets.
- FIG. 9 illustrates an exemplary embodiment in which the pattern of the embodiment of FIG. 1 is reproduced 3 times.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP21755011.0A EP4186144A2 (fr) | 2020-07-23 | 2021-07-16 | Machine electrique tournante comprenant un rotor a paquets decales |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2007737A FR3112906B1 (fr) | 2020-07-23 | 2020-07-23 | Machine électrique tournante |
| FR2007737 | 2020-07-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2022018363A2 true WO2022018363A2 (fr) | 2022-01-27 |
| WO2022018363A3 WO2022018363A3 (fr) | 2022-03-31 |
Family
ID=72885770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2021/051326 Ceased WO2022018363A2 (fr) | 2020-07-23 | 2021-07-16 | Machine électrique tournante |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4186144A2 (fr) |
| FR (1) | FR3112906B1 (fr) |
| WO (1) | WO2022018363A2 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3136611B1 (fr) * | 2022-06-09 | 2024-08-02 | Nidec Psa Emotors | Rotor de machine électrique tournante |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2007737A1 (fr) | 1968-05-03 | 1970-01-09 | Ambac Ind | |
| US20040124728A1 (en) | 2002-10-18 | 2004-07-01 | Mitsubishi Denki Kabushiki Kaisha | Permanent-magnet rotating machine |
| US20040245880A1 (en) | 2003-06-04 | 2004-12-09 | Feng Liang | Rotor skew methods for permanent magnet motors |
| US20050104468A1 (en) | 2003-07-31 | 2005-05-19 | Kabushiki Kaisha Toshiba | Rotor for reluctance type rotating machine |
| US20100052466A1 (en) | 2006-07-20 | 2010-03-04 | Siemens Aktiengesellschaft | Electrical machine with skew-running magnet pole boundaries |
| US20100277027A1 (en) | 2009-04-30 | 2010-11-04 | Gm Global Technology Operations, Inc. | Skew pattern for a permanent magnet rotor |
| EP2451049A1 (fr) | 2010-11-03 | 2012-05-09 | Brusa Elektronik AG | Rotor ayant un paquet de tôles pour une machine électrique, notamment pour une machine synchrone |
| EP2466727A1 (fr) | 2009-08-12 | 2012-06-20 | Hitachi Automotive Systems, Ltd. | Machine dynamoélectrique pour utilisation dans des véhicules |
| US20140265702A1 (en) | 2013-03-14 | 2014-09-18 | Remy Technologies Llc | Electric Machine with Skewed Permanent Magnet Arrangement |
| CN105226859A (zh) | 2015-11-03 | 2016-01-06 | 中科盛创(青岛)电气股份有限公司 | 一种永磁电机v形斜极的转子结构 |
| DE102014017304A1 (de) | 2014-11-21 | 2016-05-25 | Daimler Ag | Rotor für elektrische Maschinen und Verfahren zu dessen Herstellung |
| US20160285336A1 (en) | 2015-03-27 | 2016-09-29 | Aisin Seiki Kabushiki Kaisha | Rotary electric machine |
| CN106787559A (zh) | 2015-11-19 | 2017-05-31 | 襄阳宇清传动科技有限公司 | 一种电动汽车驱动永磁同步电机转子 |
| CN106849431A (zh) | 2017-03-31 | 2017-06-13 | 苏州汇川联合动力系统有限公司 | 分段斜极转子及永磁同步电机 |
| CN207339461U (zh) | 2017-09-29 | 2018-05-08 | 比亚迪股份有限公司 | 电机的转子组件和具有其的电机 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3667872A1 (fr) * | 2016-08-25 | 2020-06-17 | Mitsubishi Electric Corporation | Machine rotative électrique |
| US10505416B2 (en) * | 2017-11-09 | 2019-12-10 | Ford Global Technologies, Llc | Patterned offset pole rotor |
| DE102018219244A1 (de) * | 2018-11-12 | 2020-05-14 | Mahle Lnternational Gmbh | Rotoreinheit für eine elektrische Maschine |
-
2020
- 2020-07-23 FR FR2007737A patent/FR3112906B1/fr active Active
-
2021
- 2021-07-16 WO PCT/FR2021/051326 patent/WO2022018363A2/fr not_active Ceased
- 2021-07-16 EP EP21755011.0A patent/EP4186144A2/fr active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2007737A1 (fr) | 1968-05-03 | 1970-01-09 | Ambac Ind | |
| US20040124728A1 (en) | 2002-10-18 | 2004-07-01 | Mitsubishi Denki Kabushiki Kaisha | Permanent-magnet rotating machine |
| US20040245880A1 (en) | 2003-06-04 | 2004-12-09 | Feng Liang | Rotor skew methods for permanent magnet motors |
| US20050104468A1 (en) | 2003-07-31 | 2005-05-19 | Kabushiki Kaisha Toshiba | Rotor for reluctance type rotating machine |
| US20100052466A1 (en) | 2006-07-20 | 2010-03-04 | Siemens Aktiengesellschaft | Electrical machine with skew-running magnet pole boundaries |
| US20100277027A1 (en) | 2009-04-30 | 2010-11-04 | Gm Global Technology Operations, Inc. | Skew pattern for a permanent magnet rotor |
| EP2466727A1 (fr) | 2009-08-12 | 2012-06-20 | Hitachi Automotive Systems, Ltd. | Machine dynamoélectrique pour utilisation dans des véhicules |
| EP2451049A1 (fr) | 2010-11-03 | 2012-05-09 | Brusa Elektronik AG | Rotor ayant un paquet de tôles pour une machine électrique, notamment pour une machine synchrone |
| US20140265702A1 (en) | 2013-03-14 | 2014-09-18 | Remy Technologies Llc | Electric Machine with Skewed Permanent Magnet Arrangement |
| DE102014017304A1 (de) | 2014-11-21 | 2016-05-25 | Daimler Ag | Rotor für elektrische Maschinen und Verfahren zu dessen Herstellung |
| US20160285336A1 (en) | 2015-03-27 | 2016-09-29 | Aisin Seiki Kabushiki Kaisha | Rotary electric machine |
| CN105226859A (zh) | 2015-11-03 | 2016-01-06 | 中科盛创(青岛)电气股份有限公司 | 一种永磁电机v形斜极的转子结构 |
| CN106787559A (zh) | 2015-11-19 | 2017-05-31 | 襄阳宇清传动科技有限公司 | 一种电动汽车驱动永磁同步电机转子 |
| CN106849431A (zh) | 2017-03-31 | 2017-06-13 | 苏州汇川联合动力系统有限公司 | 分段斜极转子及永磁同步电机 |
| CN207339461U (zh) | 2017-09-29 | 2018-05-08 | 比亚迪股份有限公司 | 电机的转子组件和具有其的电机 |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3112906B1 (fr) | 2023-10-13 |
| WO2022018363A3 (fr) | 2022-03-31 |
| EP4186144A2 (fr) | 2023-05-31 |
| FR3112906A1 (fr) | 2022-01-28 |
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