WO2010040537A2 - Ensemble rotor-arbre pour machine électrique - Google Patents

Ensemble rotor-arbre pour machine électrique Download PDF

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Publication number
WO2010040537A2
WO2010040537A2 PCT/EP2009/007243 EP2009007243W WO2010040537A2 WO 2010040537 A2 WO2010040537 A2 WO 2010040537A2 EP 2009007243 W EP2009007243 W EP 2009007243W WO 2010040537 A2 WO2010040537 A2 WO 2010040537A2
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
shaft
main body
rotor main
longitudinal pin
Prior art date
Application number
PCT/EP2009/007243
Other languages
German (de)
English (en)
Other versions
WO2010040537A3 (fr
Inventor
Bernd Schottdorf
Franz Weissgerber
Original Assignee
Pro Diskus Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pro Diskus Ag filed Critical Pro Diskus Ag
Priority to EP09741217A priority Critical patent/EP2332235A2/fr
Publication of WO2010040537A2 publication Critical patent/WO2010040537A2/fr
Publication of WO2010040537A3 publication Critical patent/WO2010040537A3/fr

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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
    • H02K1/2793—Rotors axially facing stators
    • H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2796—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the rotor face a stator
    • 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
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • 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
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2530/00—Input parameters relating to vehicle conditions or values, not covered by groups B60W2510/00 or B60W2520/00
    • B60W2530/203—Presence of trailer
    • B60W2530/207—Towing force
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

Definitions

  • the present invention relates generally to electrical machines, and more particularly to rotors for electric machines.
  • Electric machines both in the form of electric motors and generators, are increasingly being used in areas of alternative power generation and supply.
  • conventional electrical machines u.a. due to size, weight and efficiency in many cases not suitable.
  • the patent DE 10 2006 036 707 B3 discloses a carrier ring made of fiber-reinforced plastic with cutouts for insertion of permanent magnets.
  • One or more carrier rings can form a rotor construction.
  • Permanent magnets which are embedded in a fiber or fabric-reinforced plastic.
  • Permanent magnets are each positively connected to the surrounding plastic.
  • the plastic forms a dimensionally stable unit together with the permanent magnets and the machine shaft.
  • Fig. 14 shows an overview diagram of such conventional methods from Neitzel and Mitschang. The diagram divides the shape complexity of a fiber-plastic composite on the horizontal axis and an approximate component size on the vertical axis.
  • the diagram in FIG. 14 provides information about component types and processing methods.
  • the shape complexity of round or oval tubes is low, but their component size can vary from small to large.
  • the fiber processing methods flow forming and injection molding are increasingly used in components of high shape complexity and small to medium size components, whereas the resin injection method according to Neitzel and Mitschang is more likely to be selected with high shape complexity and large component size.
  • the resin injection method according to Neitzel and Mitschang is more likely to be selected with high shape complexity and large component size.
  • the disadvantages of all processes are the processing costs and the high costs
  • DE 10 2005 049 541 A1 describes an electric machine with a shaft and a rotor body with integrated permanent magnets.
  • the rotor body is formed by molding a shaft made of a magnetically modified plastic. Both the molding of the rotor body by injection molding of a magnetically modified plastic and forming the at least an integrated permanent magnet by injection molding of a hard magnetically modified plastic as well as the molding of the rotor body to the shaft in one step.
  • the rotor body with the at least one integrated permanent magnet by injection molding of a magnetically hard-plastic modified as well as the molding of the rotor body to the shaft in one step.
  • the rotor body with the at least one integrated permanent magnet is not produced in a separate process, in order subsequently to be applied to a shaft.
  • the preferred injection molding method makes it possible to mold the rotor body during molding to the shaft.
  • DE 693 03 031 T2 describes a rotor having fiber reinforced plastic materials.
  • the hub part has an exposed, axial and / or radial connection surface and forms only an "adapter" to which a bearing lug or a shaft or the like is flanged.
  • GB 2 302 455 A describes a rotor for high speed applications.
  • the rotor is made of fiber-reinforced Kunststoffmate.rial and has a centering pin, which is designed as a central shaft. Resin-impregnated fibers are wound around the central shaft to form the rotor.
  • DE 1 613 280 describes the attachment of a rotor core to a rotor shaft.
  • the rotor shaft is determined by an inserted into a longitudinal groove pin whose ends on both sides of the
  • Läuferbleckp protrude and are connected by means of a curing adhesive to the shaft.
  • Soft steel laminate stack is formed.
  • the rotor is coupled via a spring pin connection with a shaft.
  • the spring pins are hollow and formed longitudinally slotted.
  • the spring pins are in a groove between the rotor and
  • Object of the present invention is to overcome the above-mentioned disadvantages of the prior art.
  • a rotor-shaft arrangement for an electrical machine, which comprises: a
  • Fiber composite having rotor main body, wherein the shaft and the rotor main body are coupled by means of at least one longitudinal pin connection comprising at least one elastic longitudinal pin to start and / or
  • a rotor-shaft assembly for an electric machine comprising a shaft and a rotor disposed on the shaft with a rotor main body having a fiber composite, wherein the shaft and the rotor main body are coupled by means of at least one longitudinal pin connection.
  • the rotor-shaft assembly has a flange which is connected to the body of the rotor main body, wherein the rotor main body and the flange are coupled by means of at least one of the longitudinal pin connections with the shaft.
  • the longitudinal pin connection comprises at least one
  • Longitudinal pin made of an elastic material to allow start-up and / or brake slip and / or mechanical damping. Furthermore, it can be provided that the longitudinal pin connection shears the at least one longitudinal pin at high torque.
  • the invention comprises a hybrid system with a
  • Rotary drive unit a transmission unit and an electric motor unit with a shaft
  • the Transmission unit sums the torque of the engine unit or other rotary drive unit with the torque of the electric motor unit
  • the electric motor unit comprises at least one fiber composite rotor having a longitudinal pin connection to the shaft of the electric motor unit.
  • the longitudinal pin connection for coupling the rotor main body to the shaft may comprise at least one longitudinal pin of a predetermined material, which is exchangeable against a longitudinal pin of another suddenlystixnmten material.
  • the predetermined material may be an elastic material.
  • the longitudinal pin connection shears off at high torque.
  • a solution for the hybrid system is provided, which allows startup and / or brake slip and / or mechanical damping.
  • a rotor-shaft arrangement described above, a hybrid system described above and / or an electric machine described above as and / or for a drive for an air, water or land vehicle or as a generator in a power generating device is provided the power generating device comprises wind and hydro power plants.
  • 3a shows an enlarged portion of a
  • 4a is a side view of a rotor main body with cover layers
  • 4b is a side view of a rotor main body with a mounting flange
  • Fig. 10a further storage devices, and 10b
  • Fig. 14 is a diagram according to the prior art
  • Fig. 16 is a hybrid system
  • 17a shows an electrical circuit arrangement of a and 17b motor-generator device.
  • the rotor main body may include one or a plurality of centrally disposed to the center of the rotor main body shots.
  • the rotor may comprise a plurality of magnets, which are arranged in at least one of the receptacles, wherein at least two magnets are arranged in at least one of the receptacles.
  • at least one of the magnets is a permanent magnet.
  • the material of the magnet comprises rare earth metals or a chemical compound with rare earth metals. Additionally or alternatively, the material of the magnet can have neodymium and / or a chemical compound with neodymium. The material of the magnet may additionally or alternatively comprise the chemical compound neodymium-iron-boron or samarium-cobalt.
  • the centrally arranged receptacles are holes passing through the rotor main body.
  • At least one cover layer is provided, wherein the at least one cover layer may be arranged on the rotor main body such that the magnets arranged in the central receptacles are at least partially covered.
  • At least one of the cover layers may have fiber composite material.
  • the magnets are covered in such a way by at least one of the cover layers that they are not removable from the recordings.
  • at least one cover layer is arranged on a front surface and / or a rear surface of the rotor main body.
  • the fiber composite material of the rotor may comprise carbon, epoxy resin and / or polypropylene.
  • At least one fiber for the fiber composite material may be designed to be laid in / on a forming means. It can also be provided that semifinished product comprising fiber composite material is used to form the rotor main body. Preferably, at least one fiber for the fiber composite material is designed such that it is placed in / on a shaping means.
  • the invention also provides for the use of the rotor in an electric machine as a drive for an air, water or land vehicle or as a generator in a power generating device.
  • the power generating device may include wind and hydro power plants and / or be configured to convert rotational forces generated by a vehicle and / or torques into electrical energy.
  • the invention provides a designed as a hub motor and / or generator for a vehicle electrical machine.
  • a rotor for an electric machine is provided with a rotor main body made of Fiber composite material exists.
  • a mounting flange disposed on the rotor main body may also be made of fiber composite material.
  • the rotor main body and the mounting flange are integrally formed of fiber composite material and are collectively referred to as a rotor.
  • the mounting flange may be arranged flat on a front and a rear side of the rotor main body.
  • the rotor is cylindrical and its front side, i. the cylinder cover, a circular surface, which is also the circular back, i. the cylinder bottom, opposite.
  • the ratio of rotor main body diameter to rotor main body thickness is high, i. the rotor main body is advantageously flat and therefore has a low weight.
  • a mounting flange can be arranged on the front and / or rear of the rotor.
  • the attachment flange preferably increases the thickness of the rotor main body toward the center thereof.
  • the mounting flange may be configured to transmit torque from the rotor main body to the shaft disposed on the mounting flange. This allows e.g. an assembly of preferably interconnected components, the components comprising the rotor main body, the mounting flange and the shaft.
  • the mounting flange may be formed positively to the shaft.
  • the mounting flange has a fitting hole into which the shaft is fitted.
  • a tight fit eg press fit
  • At least one fiber of a fiber material may form the rotor main body and the mounting flange.
  • the at least one fiber is wound, laid, tensioned, or otherwise arranged so that a solid such as the rotor main body and / or the fixing body can be integrally formed.
  • a solid such as the rotor main body and / or the fixing body can be integrally formed.
  • the mounting flange may comprise at least one component which is formed from plate-like fiber composite semi-finished product.
  • the mounting flange is formed from one or more flat stacked components.
  • a component is an easily available, simply constructed component which can be produced easily and quickly.
  • Under plate-like fiber composite semi-finished product is preferably understood to mean a plate formed from fiber composite raw material, which can be easily brought into a desired shape by conventional machining processes.
  • the refining process of Semi-finished fiber composite up to the mounting flange is advantageously short, inexpensive and can be handled with common machine tools.
  • Under plate-like fiber composite semi-finished product may also or alternatively be prefabricated rods, spars, pipes, mats and sandwich panels, each of which may comprise fiber composite material understood.
  • the at least one fiber towards the center of the rotor can form a thickening.
  • a natural thickening towards the center of the rotor is produced.
  • the thickening can form a mounting flange.
  • a rotor of an electric machine having a rotor main body made of fiber composite material.
  • the rotor has at least one receptacle for the arrangement of at least one magnet.
  • the at least one fiber extends along at least two adjacent sides of the at least one receptacle.
  • the at least one fiber can be guided as a loop around the at least one receptacle and thereby leave at most one side of the at least one receptacle free.
  • a loop so leads around a receptacle, which has four sides, for example, that three of these sides are looped.
  • the at least one fiber can at least partially wrap around at least two adjacent receptacles.
  • the rotor main body may include at least one flange hole and / or central shaft and / or shaft passage that may be at least partially wrapped by at least one fiber.
  • the at least one fiber may at least partially wrap around the circumference of the rotor main body.
  • the at least one fiber wraps around at least two locations of the rotor main body, wherein a location includes a receptacle, a central shaft receptacle, a flange hole or a specific area of the rotor main body.
  • a location includes a receptacle, a central shaft receptacle, a flange hole or a specific area of the rotor main body.
  • the at least one fiber comprises an endless fiber and / or piecewise thickening fibers.
  • the continuous fiber has the advantage that it is easy to work as a wound starting material.
  • thickening fibers allow the manufacture of a rotor main body of constant and uniform thickness.
  • a disk-shaped rotor main body is formed by at least one fiber, then a natural
  • At least one flange hole can serve as a balancing means for the rotor main body, in particular if it is disc-shaped.
  • a method of manufacturing a rotor for an electric machine includes making a rotor main body as a rotor only of fiber composite material, and disposing a mounting flange made only of fiber composite material on the rotor main body.
  • a rotor-shaft assembly for an electric machine comprising a shaft and a rotor disposed on the shaft with a rotor main body comprising fiber composite, the shaft and the rotor main body being coupled by at least one longitudinal pin connection comprising at least one elastic longitudinal pin to start and / or brake slip and / or mechanical
  • the rotor-shaft assembly has a flange which is connected to the rotor main body, wherein the rotor main body and the flange are coupled by means of at least one of the longitudinal pin connections with the shaft.
  • the elastic longitudinal pin is interchangeable with another longitudinal pin.
  • the longitudinal pin connection shears the at least one longitudinal pin at high torque.
  • a hybrid system with one engine unit or another A rotary drive unit, a transmission unit and an electric motor unit provided with a shaft, wherein the transmission unit sums the torque of the engine unit or other rotary drive unit with the torque of the electric motor unit and the electric motor unit comprises at least one fiber composite rotor coupled by a longitudinal pin connection to the shaft of the electric motor unit ,
  • the longitudinal pin connection shears off at high torque.
  • an embodiment of the hybrid system is provided which allows startup and / or brake slip and / or mechanical damping.
  • a rotor-shaft arrangement as described above, a hybrid system described above, and / or an electric machine described above are as a and / or for a drive for an air, water or land vehicle or as a generator in a power generating device, wherein the power generating device comprises wind and hydro power plants.
  • a storage arrangement is provided with a rotatably arranged on a rotational axis arranged rotor made of fiber composite material and at least one rotor bearing, which is in operative connection with the rotor in a radially spaced from the axis of rotation region.
  • at least one of the bearings and in particular two bearings can be in operative connection with a radially outer region of the rotor.
  • at least two of the bearings on different sides of the rotor are in operative connection with this.
  • at least one of the bearings is operatively connected to the shaft.
  • at least one of the bearings is provided on or within a stator of the electric motor.
  • At least one of the bearings, which is operatively connected to a radially outer region of the rotor may be a sliding bearing.
  • a magnetic bearing may be provided.
  • magnets in particular permanent magnets, may be provided on or within the rotor for the magnetic bearing.
  • the magnetic bearing can be actively controlled.
  • a circular arrangement of a group of permanent magnets on or within the rotor and a corresponding circular arrangement of a group of external stationary permanent magnets or field coils in the vicinity of the rotor with repulsive field force exerts a radial centering effect on the rotor and relieves a radial bearing.
  • the shaft is supported by at least two bearings.
  • an electric machine with a stator, a rotor, a shaft and a bearing arrangement is provided.
  • a method of manufacturing a bearing assembly for an electric motor wherein a fiber composite rotor, shaft, and rotor bearing is provided, and wherein the rotor, shaft, and rotor bearing are arranged such that the rotor is rotatably disposed about an axis of rotation and wherein the at least one rotor bearing is in operative connection with the rotor in a region spaced radially from the axis of rotation.
  • a use of the storage device described above is provided in an electric machine as a drive for an air, water or land vehicle or as a generator in a power generating device, in particular in wind and hydroelectric power plants.
  • a method of manufacturing a fiber composite material rotor having a rotor main body for an electric motor comprising the steps of: combining fibers of a fiber material with a matrix into one Amount of fiber, introducing the amount of fiber with diffusely arranged fibers into a negative mold corresponding to the shape of the rotor main body, compressing the amount of fiber introduced in the negative mold and curing the compressed fiber amount, which is preferably at a predetermined temperature and pressure.
  • the fibers of the fiber material are formed by separation, cutting or the like
  • Continuous fiber in fiber parts of a certain length are combined with a matrix.
  • the matrix is preferably a binder or
  • a matrix may be selected, for example, from the group of thermosets (for example unsaturated polyester resins, vinyl ester resins, epoxy resins) or from the group of thermoplastics (for example polypropylene, polyamide, polyethylene terephthalate, polyphenylene sulfide, polyether ether ketone).
  • thermosets for example unsaturated polyester resins, vinyl ester resins, epoxy resins
  • thermoplastics for example polypropylene, polyamide, polyethylene terephthalate, polyphenylene sulfide, polyether ether ketone
  • Diffusely arranged fibers advantageously allow rapid and inexpensive processing, since no
  • the hardening of the fiber mixture is preferably a process involving a phase transition of the matrix from liquid after firm causes.
  • this phase transition is irreversible and reversible for thermoplastics.
  • Curing in this context does not necessarily mean that the fiber composite formed after curing is hard or stiffened; Depending on the matrix and fiber type, it can have different mechanical and physical properties, such as high toughness, low weight, electrical conductivity, high flexibility, etc.
  • the fiber composite material and / or the fiber may comprise carbon.
  • Carbon is a particularly lightweight and durable material that can form many forms as fiber material and permanently retains such a form by interaction with a binder.
  • a rotor main body made of carbon fiber composite material is lightweight and yet can withstand acting forces and moments.
  • the amount of fiber can be heated by means of a microwave source.
  • the fiber composite material comprises carbon
  • the electrical conductivity of carbon may be used to be heated by a microwave source. This has the advantage over conventional autoclave processes of a reduced energy requirement to cure the fiber mixture.
  • the amount of fiber may preferably be below a predetermined pressure during heating by a microwave in a negative mold, or the amount of fiber was pressed under predetermined pressure before being heated in the negative mold.
  • a predetermined pressure rather than a negative mold, may be caused by the gas pressure surrounding the fiber. This has the advantage that the amount of fiber reaches a high density of material and thereby low volume.
  • the material of the negative mold also has fiber composite material and in particular carbon.
  • a negative mold for producing a rotor main body wherein at least one fiber is in or on the negative mold and a binder or connecting means interconnects portions of the at least one fiber.
  • An electric machine may include a stator and a rotor including the rotor main body according to any one of the above solutions.
  • such an electric machine is a disc rotor electric motor / generator with permanent-magnet rotor and serves as a drive for an air, water or land vehicle or as a generator in a power generating device, wherein the power generating device according to an embodiment wind and
  • Hydroelectric plants includes.
  • FIG. 1 shows an electric machine including a stator 102 and a rotor main body 104.
  • the rotor main body 104 may be disk-shaped, cylindrical, frusto-conical or double-frusto-conical.
  • On the rotor main body 104 may additionally be arranged a mounting flange, wherein an arrangement rotor main body 104 is referred to with a mounting flange as a rotor.
  • FIG. 1 shows two magnets 106 visible in the sectional view of the rotor main body 102, for example permanent magnets, of which a plurality of rings are arranged in or on the rotor main body 104, and stator windings (not shown) provided in the stator 102.
  • FIG. 1 shows an electric machine including a stator 102 and a rotor main body 104.
  • the rotor main body 104 may be disk-shaped, cylindrical, frusto-conical or double-frusto-conical.
  • the shaft 108 may be, for example, a rod-shaped component made of solid material or a hollow cylindrical component, wherein the cross section of such a component may be completely or partially circular, rectangular, elliptical or toothed and is designed as a joint, hollow, gimbal or flexible shaft.
  • FIG. 1 illustrates two bearings 110 that radially support the shaft 108 so that the shaft 108 and its associated rotor main body 104 are radially held in position even when rotated about its axis of rotation.
  • the magnets 106 mounted on the rotor main body 104 magnetically interact with the stator windings on the stator 102 to cause the rotor main body 100 and the shaft 108 connected thereto to rotate about the rotor axis.
  • the operation of the electric machine is reversed. Rotation of the shaft 108 and the rotor main body 104 connected thereto results in electromagnetic interaction between those disposed on the rotor main body Magnets 106 and the stator windings, which finally electrical current is generated.
  • the rotor main body 104 can rotate at a diameter of preferably greater than two meters, four meters, six meters and more stable and with a small stator gap 112 at high rotational speeds in the stator, so that a good magnetic interaction between the magnets 106 and the stator is exploited.
  • a rotor 104 as an external component surrounds a stator as an internal component.
  • Fig. 2 shows a rotor main body 200 provided in a disc shape and a predetermined thickness.
  • the material of the rotor main body 200 comprises fiber composite material, preferably carbon fiber composite material.
  • the rotor main body 200 further includes 172 (by way of example only) rectangular receptacles 202 centered around the rotation axis of the rotor main body 200 and close to the outer periphery thereof.
  • Centrally located flange holes 204 and the shaft passage 206 centrally located in the rotor main body 200 provide connection to a shaft (not shown).
  • the centrally disposed flange holes 204 are located between the central shaft passage 206 and those near the outer periphery of the rotor main body 200
  • the number and arrangement of the flange holes 204 may depend in particular on forces and moments to be transmitted.
  • the rectangular receptacles 202 serve to receive magnets, in particular permanent magnets. In each case at least one magnet can be arranged in all, a plurality, in particular two, three, four, five, eight, eleven or 16, or in exactly one shot. In this case, an arbitrary number of receptacles 202 are provided for the rotor main body 200, for example exactly one receptacle, two, three, four, five, eight, 13, 16, 65 or 172 recordings.
  • FIG. 3a shows an enlarged view of a partial region of a rotor main body 200.
  • the receptacles 302 on the outer edge of the rotor main body each receive a magnet 304.
  • the magnets 312 enter into magnetic interaction with the disposed on the stator stator windings (not shown) and thereby generate power (where the electrical machine functions as a generator), or solve this way a rotation of the rotor (if the electrical Machine works as a motor).
  • N north pole of the magnets 312
  • Receivers 302 instead of one, two smaller magnets 312, 314 arranged along side by side.
  • the smaller magnets 312, 314 are separately magnetized magnets. Compared to Fig. 3a, the two smaller magnets 312, 314 have the total volume of one of the magnets 304 shown there. It is exploited the property that in the production of magnets smaller, ferromagnetic body can be magnetized better than larger in the rule. So, two smaller magnets usually have one higher magnetization than a comparable magnet whose volume corresponds to the sum of the volumes of the two smaller magnets when magnetized in the same magnetic field in the same way as the two smaller magnets.
  • the magnets in a receptacle have a greater magnetization for the same total volume and the same total weight than a comparably produced magnet twice as large in a receptacle as is used, for example.
  • a rotor with more powerful magnets with the same volume and weight can be provided. Because the rotor main body comprises fiber composite material, the weight of the rotor is further reduced as compared to an equally powerful conventionally manufactured rotor.
  • At least two magnets or similar formulations should also be understood to mean those arrangements in which at least two ferromagnetic bodies were magnetized as separate bodies, but then after their Magnetization or after a first magnetization process, which can be followed by further magnetization processes, are joined together to form a body, in particular by gluing together or other methods for joining objects.
  • the advantages presented here of using magnets which have been magnetized as smaller bodies also come into play in such embodiments.
  • the north poles of two magnets 312, 314 always point either to the center or to the edge of the motor.
  • Other examples include arrangements in which the north poles of the two magnets in a receptacle point in different directions.
  • Other examples further include arrangements in which the magnets of a receptacle are arranged not adjacent to their longitudinal edges but adjacent to their short edge surfaces.
  • three, four or more smaller individual magnets are arranged in at least one receptacle. While in the example shown in Fig. 3b, the north pole of the magnets always points in different directions in adjacent photographs, examples are also included in which the north poles of the magnets always point in the same direction.
  • examples may be provided in which the poles of the individual magnets are arranged arbitrarily directed.
  • Fig. 4a shows a rotor main body 402 and a shaft 404 in a side view.
  • the rotor main body 402 has rectangular receptacles 406, one of which can be seen in section above the line of symmetry.
  • On the front and rear sides of the rotor main body 402 are two
  • Cover layers 412, 414 arranged, which are made of plate-like semi-finished carbon fiber composite material.
  • the cover layers 412, 414 cover the rectangular receptacles 406 and optionally arranged therein magnets, of which in the sectional view, a magnet 420 is visible.
  • the receptacles 406 of the rotor main body 402 are holes therethrough. In this case, in the receptacles 406 each two of the magnets described above (not shown).
  • the two cover layers 412 and 414 are attached to the rotor main body and prevent falling out of the magnets.
  • the cover layers 412, 414 comprise fiber composite material. This ensures that the magnets holding cover layers 412, 414 have low weight.
  • the receptacles 406 merely represent recesses that are not holes passing through the rotor main body. In such a case, it can be provided that only one cover layer 412 for fastening the magnets 420 to the rotor main body 402 is arranged.
  • Fig. 4b shows a mounting flange 400. Further, Fig. 4b shows a side view of the rotor main body 104 shown in Fig. 1 and a shaft 404.
  • the rotor main body 402 which is shown above the shaft 404 in sectional view, has a rectangular socket 406, as in Figs Fig. 1, on.
  • cover sheets 412 and 414 made of carbon fiber composite plate-like material and extending on both sides from the outer edge 416 of the rotor main body 402 to an inner mounting flange disk 418.
  • the cover layers 412 and 414 cover the rectangular receptacles 406 and magnets disposed therein, e.g. Permanent magnets, of which in the sectional view, a permanent magnet 420 is visible.
  • Front 408 and rear 410 each have two inner and outer mounting flange 418 and 422 arranged.
  • the inner mounting flange disks 418 are directly on the rotor main body 402 by an adhesive
  • Mounting flange 422 are in turn by a
  • Adhesive (not shown) each connected to an adjacent them inner mounting flange 418.
  • the mounting flange discs 418 and 422 are made of plate-like carbon fiber composite semi-finished components. The entire mounting flange provides a positive and non-positive connection
  • the rotor main body 402 and / or the mounting flange disks 418 and 422 may have a rectangular, elliptical, annular cross section or the like.
  • the mounting flange disks 418 and 422 may be integrally formed with each other and disposed on the rotor main body 402, or the mounting flange disks 418 and 422 are integrally formed with the rotor main body 402.
  • the mounting flange disks 418 and 422 provide the rotor main body with an area and volume greater interface with the shaft 404, thereby enhancing the transmission of forces and moments between the rotor main body 402 and the shaft 404.
  • FIG. 5 shows a rotor 500. From outside, it can be seen in turn in FIG. 5: a rotor main body 502 integrally formed with the rotor main body 502 truncated cone-shaped mounting flange 504, a provided in the mounting flange 504 shaft passage 506 with recessed groove 508 and provided with a driving lug 510 shaft 512 in cross-sectional view.
  • the shaft 512 is disposed by suitable fit in the shaft passage 506 of the mounting flange 504.
  • the interchangeable cam lug 510 engages the groove 508 and allows torques and forces to be transmitted between the shaft 512 and the rotor main body 502, such that the shaft 512, the rotor main body 502, and the mounting flange 504 are averaged at the same angular velocity in the two directions of rotation indicated by the double arrow 514 can rotate.
  • FIG. 6 shows a section of a rotor main body 600.
  • Exemplary carbon fiber shims 602, 604, 606, 608, 610 are illustrated in the sector-shaped section of the rotor main body 600 shown in FIG.
  • a shaft feedthrough carbon fiber loop 602 passes around a shaft passage 612 and around a receptacle 614.
  • a mounting flange hole carbon fiber loop 610 passes around a mounting flange hole 616 and a plurality of receptacles 614.
  • a multi-receptacle carbon fiber loop 606, 608 guides around a plurality of receptacles 614.
  • the above Carbon fiber rings can be combined with each other, in series, alternately, according to a predetermined sequence pattern and, for example, by a continuous carbon fiber 618 can be realized.
  • fiber loops are in eight-, helical- or Fassbandform to one or more receptacles 614 and / or one or more mounting flange holes 616 and / or the Wound passage 612 and / or the outer edge of the rotor main body 600 or fiber loops are wound in geodesic lines between two or more locations, the one or more receptacles 614 and / or one or more Befest Trentsflanschlöcher 616 and / or the shaft passage 612 and / or the outer edge of Rotor main body 600 include.
  • the fiber loops 606, 608 and 610 shown in Fig. 6 are drawn only schematically as closed, they may also be open as loops on one side or at a position with overlapping parts of a
  • Endless carbon fiber 618 is added to the outer peripheral portion of the rotor main body 600 by additional pieces
  • Rotor main body 600 produce. To the middle of
  • Rotor main body 600 thickens the endless carbon fiber
  • FIG. 7 shows a rotor 700 of an electric machine and a hub 704 made of continuous carbon fiber.
  • the shaft passage formed by the hub 704 positively receives a shaft 702.
  • four holes are coupled with longitudinally disposed pins 706 disposed thereon.
  • the longitudinal pins may be, in particular, cylinder-pin-like, conical-pin-type or kerbwind-type longitudinal pins. Shaft and hub thus form a coupled connection.
  • the number and arrangement of the longitudinal pins 706 at the junction of shaft 702 and hub 704 may depend in particular on the forces and moments to be transmitted. In the example shown in FIG. 7, four longitudinal pins were used.
  • any number of longitudinal pins can realize the pin connection, in particular a longitudinal pin, two, three, four, five, eleven or 18 longitudinal pins.
  • the material of the longitudinal pins 706 is elastic and shears off at high torque.
  • the longitudinal pins 706 provide on the one hand start-up, brake slip and rotational damping and on the other hand at the same time a safety function to protect the rotor 700 and the shaft 702 from excessive torque.
  • FIG. 8 shows an electric machine 800.
  • a stator 801 engages around a rotor main body 802.
  • the rotor main body 802 is integrally formed with a mounting flange 804 which is connected to a shaft 808 through a center boss nose 806.
  • the driving lug 806 engages in a recessed into the mounting flange 810 a.
  • the shaft 408 is supported radially and / or axially on both sides of the stator 801 by two stationary rolling bearings 812.
  • the stator 801 in FIG. 8 includes electric stator coils (not shown) whose magnetic field interacts with a magnetic field of permanent magnets 814 arranged in an outer area of the rotor main body.
  • Permanent magnets 814 are in hollow receptacles 817 of the
  • Rotor main body 802 arranged and disposed on both sides of the rotor main body 802 cover layers
  • the mounting flange 804 offers a large
  • the mounting flange 804 allows higher forces and moments to be transmitted than is possible with an electrical machine 100 designed in comparable dimensions as shown in FIG.
  • the bearings 812 shown in Fig. 8 provide support for the shaft 808 and the rotor main body 802 connected thereto via the mounting flange 804. However, if only the bearings 812 are provided as the bearings, rapid rotation of the rotor main body 802 occurs without bearing in axial directions Vibration. It would be desirable to realize a bearing which ensures that the rotor main body 802 does not leave its axially provided position, in particular at its edges, during such rotational movement and / or in the event of vibrations, oscillations or similar movements.
  • Fig. 9a shows a schematic storage device.
  • a rotor 904 is connected to a shaft 902 via a suitable rotor-shaft arrangement.
  • the rotor 904 made of carbon fiber composite material in this case includes receptacles 906, 908 for magnets (not shown).
  • the rotor 904 is supported by two radial bearings 912, 914.
  • the radial bearings 912, 914 ensure that the shaft 902 and the rotor 904 attached thereto are held in their intended position in the radial direction R.
  • further bearings 916, 918 are provided according to the invention in the example shown in FIG. 9a, which support the rotor on both sides and provide axial support of the rotor 904.
  • the thrust bearings 916, 918 ensure that the rotor 904 and its associated shaft 902 are maintained at a predetermined axial position A during operation of the electric machine.
  • Fig. 9b shows a bearing assembly with bearings 922, 924 supporting the shaft axially.
  • bearings 926, 928 are provided. These bearings 926, 928 are at a radially outer portion of the rotor 904 with this in operative connection.
  • bearings 926, 928 may be disposed in and / or on a stator (not shown). Such an arrangement of the bearings 926, 928 is particularly suitable for preventing vibration of the rotor from its axial position.
  • bearings 936, 938 are provided.
  • the outboard portion of the rotor 904 with this operatively connected bearing 936 and 938 support the rotor 904 in the axial and / or radial direction.
  • Fig. 9d shows another example of a storage arrangement.
  • a bearing 948 provided on the outer portion of the rotor supports the rotor 904 so as to axially support the rotor 904.
  • Another bearing 944 in turn supports the shaft 902 and the Rotor 904 connected to it so as to be radially supported.
  • FIG. 10a shows an inner side surface 1022 of a stator of an electric machine 1000, a cross section 1024 through the stator in the schematic representation shown, a shaft 1002, a rotor 1004 connected to the shaft, receptacles 1006, 1008 for magnets (not shown) in the rotor 1004 and inventively provided bearings 1012, 1014, 1016, 1018.
  • the shaft 1002 is thereby radially supported by the provided bearings 1012, 1014.
  • bearings 1016, 1018 are provided in the example shown, which are arranged on the stator and support the rotor 1004 axially.
  • the radially supporting bearings 1012, 1014 may be rolling bearings and the axially supporting bearings 1016, 1018 may be plain bearings. Due to the arrangement in FIG. 10a, the rotor 1004 can be operated at a diameter of preferably about two meters, four meters, six meters and more, stable and with a small stator gap at high rotational speeds, so that a good magnetic interaction between the magnets and the Stator can be used.
  • the bearings 1012, 1014 realize a radial bearing of shaft 1002.
  • a magnetic bearing is preferably provided for the axial bearing of the rotor 1004.
  • further magnets 1030 and 1032 are arranged both on or in the rotor 1004 and on or in the stator.
  • the magnets 1030 mounted centrally on or in the rotor 1004 and the stationary magnets 1032 arranged correspondingly to these in the vicinity of the rotor 1004 act on one another in an attractive and / or repulsive manner.
  • a radial one additionally arises Centering effect on the rotor 1004, so that the radially supporting bearings 1012, 1014 are relieved.
  • Another example provides, in addition or as an alternative, another identical bearing, for example air bearing.
  • Fig. 11 shows a negative mold 1100 for rotor production.
  • the female mold 1100 is designed along a longitudinal section mirror symmetrical to the axis of symmetry 1102 and has a negative mold outer edge 1104, a carbon fiber recess 1106, the receptacles 202 (of Fig. 2) corresponding pins 1108, a carbon fiber recess 1106 and the mounting flange holes 204 (of Fig. 2) corresponding pins 1110 on.
  • Disposed in the center of the female mold 1100 is a washer 1112 corresponding to the shaft passage 206 (of Fig. 2).
  • the negative mold outer edge 1104, the pins 1108, the pins 1110 and the disk 1112 are integrally formed with the female mold 1100.
  • the material of the female mold 1100 is made of aluminum or carbon fiber composite material and can be closed by a negative mold closing lid (not shown).
  • Carbon fibers 1114 are used e.g. deposited, stretched or laminated by a fiber lay-off device (not shown) into the carbon fiber recess 306 according to a predetermined pattern.
  • Fig. 12 shows a negative mold 1200 for rotor production.
  • the negative mold 1200 is shown in cross section in FIG.
  • carbon fibers 1202 are shown lying in the negative mold 1200, also shown in cross-section.
  • the location and Alignment of the carbon fibers 1202 in the negative mold 1200 is merely qualitative.
  • the carbon fibers 1202 may have any position and orientation in the negative mold 1200.
  • the negative mold 1200 is symmetrical to the axis 1204, so that only one half of the negative mold 200 is explained in more detail.
  • the negative mold 1200 in FIG. 2 comprises tenons 1206 which correspond in shape and volume to the receptacles 406 shown in FIGS. 4a, 4b, respectively. Furthermore, the negative mold 1200 in the center comprises a pin 1208, which corresponds to a shaft passage. The pins 1206 and the pin 1208 are formed integrally with the female mold 1200. The remaining space between the pins 1206, the pin 1208 and the negative mold 1200 itself forms a stepped cylindrical trough whose shape and volume corresponds to a rotor.
  • This rotor includes a rotor main body corresponding to a rotor main body portion 1210 in the female mold 1200, and a mounting flange unilaterally and integrally formed with the rotor main body corresponding to a mounting flange portion 1212 in the female mold 200.
  • the material of the negative mold 1200 may be e.g. Aluminum or fiber composite material.
  • Fig. 13 shows a flow chart for a rotor manufacturing process.
  • the flowchart provides four alternative procedures for making a rotor main body 1300 consisting of only carbon fiber composite material.
  • Process 1302 comprises the sequential steps of negative-setting or stretching carbon fiber into fiber 1304, epoxy in the negative-mold carbon fiber 1306 and 1308 harden the mixture of carbon fiber and epoxy resin at a predetermined pressure P H and a predetermined temperature T H.
  • the process flow 1310 includes the step of milling and drilling a plate-like carbon fiber composite semi-finished product 1312 so that the rotor main body is formed.
  • Process 1314 includes the sequential steps of laminating fiber prepreg in a negative mold 1316 and curing 1318 the fiber prepreg at a predetermined pressure P H and a predetermined temperature T H.
  • Process 1320 includes the sequential steps of mixing carbon fibers with polypropylene 1322 to formulate 1324 the mixture of carbon fiber with polypropylene in a negative mold and to cure 1324 and cure the mixture at a predetermined pressure P H and a predetermined temperature T H 1326.
  • FIG. 15 shows an electric machine 1500 in which three of the stators 1502, 1504 and 1506 shown in FIG. 8, each having rotatably mounted therein rotors 1508, 1510 and 1512, are arranged in series on a shaft 1514.
  • Such a stator-rotor subunit of a stator and a rotor in this case corresponds to the electrical machine 800 shown in FIG. 8.
  • the shaft 1514 of the electric machine 1500 shown in FIG. 15 is supported radially and / or axially by two fixed rolling bearings 1516 similarly as shown in FIG. Since the diameter of the stator-rotor subunit shown in FIG. 15 is larger than the thickness of the stator-rotor subunit, the electric machine can 1500 with two, three or more series-arranged stator-rotor sub-units achieve a more compact design, ie a ratio of machine diameter to machine thickness of about 1: 1 and thereby the power and torque are increased.
  • a housing 1518 enclosing the stator-rotor subunits shown in FIG. 15, which protects the electric machine 1500 from inward and outward influences (eg, dust, heat, moisture, electromagnetic radiation, etc.). protects.
  • inward and outward influences eg, dust, heat, moisture, electromagnetic radiation, etc.
  • FIG. 16 shows a hybrid system.
  • the device Ml is doing a
  • engine M2 is a conventional internal combustion engine or similar.
  • the torques of the two acting as motor devices Ml and M2 are in a planetary gear
  • FIGS. 17a and 17b show an electrical circuit arrangement of a motor-generator device.
  • 17a shows a circuit arrangement in a state in which the motor-generator device as a generator G1 converts mechanical energy into electrical energy and stores it in a battery 1702.
  • a rectifier or commutator may be connected between battery 1702 and generator Gl if the generator supplies Gl power.
  • Fig. 17b shows a circuit arrangement in a state in which the motor-generator device as a motor Ml acting electrical energy from a battery 1702 converts into mechanical energy.
  • a vehicle drive may be implemented which, upon braking the vehicle, feeds kinetic energy back into a battery 1702 and selectably converts electrical energy of the battery 1702 into kinetic energy.
  • a rotor-shaft arrangement of the motor-generator device can be designed so that drive and brake slip by elastic longitudinal pins allow soft starting and braking in the hybrid system and provided by the elastic longitudinal pins damping behavior of a backward non-constant rotation of the internal combustion engine via the planetary gear 1502 prevented on the motor-generator device.
  • this may in particular as a drive device or other use in an aircraft (in particular a passenger aircraft, a powered aircraft, a glider with or without auxiliary engine or an electric machine for an airship ), Watercraft (in particular a ship or boat, for example a motorboat or a sailboat with or without an auxiliary engine) or land vehicle (especially a car, a motorcycle, a truck, a locomotive, a forklift) are used, the low weight and the high Stability of the rotor main body made of fiber composite allows high start-up and braking acceleration of the drive device.
  • an aircraft in particular a passenger aircraft, a powered aircraft, a glider with or without auxiliary engine or an electric machine for an airship
  • Watercraft in particular a ship or boat, for example a motorboat or a sailboat with or without an auxiliary engine
  • land vehicle especially a car, a motorcycle, a truck, a locomotive, a forklift
  • the electric machine can take a combination of generator function and motor function, and e.g. in an electric vehicle or vehicle with hybrid drive, either during the deceleration of the vehicle, feeding energy into an electric battery or, when accelerating the vehicle, converting electrical energy from the battery as an engine back into kinetic energy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

L'invention concerne un ensemble rotor-arbre pour machine électrique (100; 800; 1000; 1500) comportant un arbre (108; 404; 512; 702; 808; 902; 1002; 1514) et un rotor (500; 700; 904; 1004; 1508, 1510, 1512) monté sur l'arbre (108; 404; 512; 702; 808; 902; 1002; 1514) et présentant un corps principal de rotor (104; 200; 402; 502; 600; 802; 1300) à base de matériau composite renforcé par des fibres. Selon l'invention, l'arbre (108; 404; 512; 702; 808; 902; 1002; 1514) et le corps principal de rotor (104; 200; 402; 502; 600; 802; 1300) sont couplés par au moins une liaison par cheville allongée présentant au moins une cheville allongée (706) élastique, afin de permettre un glissement au démarrage et/ou au freinage et/ou un amortissement mécanique. L'invention porte également sur un système hybride, une machine électrique, un procédé de fabrication d'un ensemble rotor-arbre et sur l'utilisation d'un ensemble rotor-arbre, d'un système hybride et/ou d'une machine électrique en tant qu'entraînement et/ou pour l'entraînement d'un véhicule aérien, maritime ou terrestre ou bien en tant que génératrice dans un dispositif de génération de courant.
PCT/EP2009/007243 2008-10-08 2009-10-08 Ensemble rotor-arbre pour machine électrique WO2010040537A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09741217A EP2332235A2 (fr) 2008-10-08 2009-10-08 Ensemble rotor-arbre pour machine électrique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008050801A DE102008050801A1 (de) 2008-10-08 2008-10-08 Rotor-Welle-Anordnung für eine elektrische Maschine
DE102008050801.2 2008-10-08

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WO2010040537A2 true WO2010040537A2 (fr) 2010-04-15
WO2010040537A3 WO2010040537A3 (fr) 2011-01-13

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US11697505B2 (en) 2019-03-01 2023-07-11 Pratt & Whitney Canada Corp. Distributed propulsion configurations for aircraft having mixed drive systems
US11732639B2 (en) 2019-03-01 2023-08-22 Pratt & Whitney Canada Corp. Mechanical disconnects for parallel power lanes in hybrid electric propulsion systems
US11628942B2 (en) 2019-03-01 2023-04-18 Pratt & Whitney Canada Corp. Torque ripple control for an aircraft power train
US11535392B2 (en) 2019-03-18 2022-12-27 Pratt & Whitney Canada Corp. Architectures for hybrid-electric propulsion
US11486472B2 (en) 2020-04-16 2022-11-01 United Technologies Advanced Projects Inc. Gear sytems with variable speed drive

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US4677365A (en) * 1984-09-06 1987-06-30 Yang Tai Her Automotive charging system having generator with multiple windings and regulators
US5162686A (en) * 1989-11-27 1992-11-10 Gec Alsthom Sa Motor rotor having magnets
US20070274109A1 (en) * 2004-04-28 2007-11-29 Toyota Jidosha Kabushiki Kaisha Power Supply System for Vehicle with Improved Energy Efficiency and Vehicle Including the Same

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Publication number Publication date
EP2332235A2 (fr) 2011-06-15
DE102008050801A1 (de) 2010-04-15
WO2010040537A3 (fr) 2011-01-13

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