GB2505454A - Turbine system, eg turbocharger or turbogenerator, with integrated electrical machine - Google Patents

Turbine system, eg turbocharger or turbogenerator, with integrated electrical machine Download PDF

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Publication number
GB2505454A
GB2505454A GB201215457A GB201215457A GB2505454A GB 2505454 A GB2505454 A GB 2505454A GB 201215457 A GB201215457 A GB 201215457A GB 201215457 A GB201215457 A GB 201215457A GB 2505454 A GB2505454 A GB 2505454A
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GB
United Kingdom
Prior art keywords
rotor
turbine system
shaft
turbine
compressor
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Granted
Application number
GB201215457A
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GB2505454B (en
GB201215457D0 (en
Inventor
David Gerada
John Parker
Michael Burkinshaw
John Bywater
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Cummins Generator Technologies Ltd
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Cummins Generator Technologies Ltd
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Priority to GB1215457.1A priority Critical patent/GB2505454B/en
Publication of GB201215457D0 publication Critical patent/GB201215457D0/en
Publication of GB2505454A publication Critical patent/GB2505454A/en
Application granted granted Critical
Publication of GB2505454B publication Critical patent/GB2505454B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/04—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using kinetic energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/04—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
    • F02B37/10—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump at least one pump being alternatively or simultaneously driven by exhaust and other drive, e.g. by pressurised fluid from a reservoir or an engine-driven pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/02—Drives of pumps; Varying pump drive gear ratio
    • F02B39/08—Non-mechanical drives, e.g. fluid drives having variable gear ratio
    • F02B39/10—Non-mechanical drives, e.g. fluid drives having variable gear ratio electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)

Abstract

A turbine system is disclosed for use in the exhaust stream of an internal combustion engine. In one embodiment the turbine system is a turbocharger, while in another embodiment the turbine system is a turbogenerator. The turbine system comprises a turbine (10, fig.1) and an electrical machine 30 arranged co-axially on a shaft 22. The electrical machine comprises a cup-shaped rotor 32 in which a magnet assembly, eg a Halbach cylinder (46, fig.3) or a plurality of magnetic segments, is located. The rotor 32 may have an internally threaded neck 40 engaged with the threaded end of the shaft 22. A cup-shaped rotor may allow the length of the shaft and the weight of the rotor to be reduced. This can allow a high power to weight ratio to be achieved, thereby maximizing the power that can be obtained for a defined rotor mass, and allow the stiffness of the rotating parts to be improved.

Description

TURBINE SYSTEM WITH INTEGRATED ELECTRICAL MACHINE
The present invention relates to a turbine system with an integrated electrical machine for use in the exhaust stream clan internal combustion engine. In one embodiment the turbine system is a turbocharger, while in another embodiment the turbine system is a turbogenerator.
Turbocbarging isa well-knovvn technique for enhancing the performance ofan internal combustion engine. A conventional turbocharger comprises a turbine driven by exhaust gases from the engine. The turbine drives a compressor, which delivers compressed air to the intake of the engine, thereby increasing engine power.
Conventional turbochargers suffer from an effect knovvn as "turbo lag" due to the time taken for the turbine to speed up when the engine is accelerating. In order to reduce the effects of turbo lag, it has been proposed to integrate an electrical machine within the turbocharger. The electrical machine can be used to assist in driving the compressor at low speeds, and to generate electricity during high engine load conditions when there is excess energy in the exhaust gas stream.
Turbogenerators have also been proposed for generating electricity from the exhaust stream ofan internal combustion engine. Turbogenerators comprise an electrical machine driven by a high speed turbine in the exhaust stream.
The most common approach when integrating an electrical machine with a turbocharger is to pace the electrical machine inside the turbocharger betvveen the turbine and compressor. However this can pose a number of technical and manufacturing challenges.
For example, the materials which are usually used for electrical machines may be unsuitable for use inside a turbocharger due to the high temperatures which are experienced. Manufacturing the turbocharger may also be difficult due to the machining which is required in the housing to cool the electrical machine. There may also be issues associated with servicing a turbocharger unit with an embedded electrical machine.
WO 01/21944 discloses a turbocnarging system in which a motor is located to one side of a turbocharger, adjacent to the compressor. The rotor of the motor is connected to the rotor of the turbocharger by a flexible coupling.
Locating the electrical machine to one side of the turbocharger can allow the machine to be located in a thermally more favourable environment, and can facilitate servicing of the machine. However a problem with such an arrangement is that the turbocharger's shaft becomes longer, and the electrical machine's rotor becomes an overhung mass. This may compromise the straightness and balance of the assembly and increase the rotating mass, thus impacting on the efficiency of the turbocharger.
According to a first aspect of the present invention there is provided a turbine system for use in the exhaust stream of an internal combustion engine, the system comprising a turbine and an electrical machine arranged co-axially on a shaft, wherein the electrical machine comprises a cup-shaped rotor.
By providing the electrical machine with a cup-shaped rotor, it may be possible to reduce the length of the shaft and the weight of the rotor. This can allow a high power to weight ratio to be achieved, thereby maximizing the povver that can be obtained for a defined rotor mass, and allow the stiffness of the rotating parts to be improved.
Preferably the rotor comprises a hollow cylinder which is at least partially closed at one end. The other end of the cylincer may be open. This arrangement can allow a roto' with a low mass to be provided. Manufacture may be facilitated by allowing the closed end of the roTor to be connected to another rotating part while allowing a magnet assembly to be inserted into the cylinder through the open end.
Preferably the rotor is attached directly to the shaft. This may avoid the need to extend the shaft through the rotor, thereby helping to achieve lightness and stiffness.
In a conventional arrangement, a locking nut vvould be used to bold the rotor in place on the shaft. However this would increase the shaft length and the overhung mass, which in turn would compromise the straightness and balance of the assembly.
H a preferred embodirrient, the rotor is arranged for threaded engagement with the shaft.
For exampe, the rotor may comprise an internUy-thread bore which screvvs onto a threaced end of the shaft. AIternativey, the shaft may have an internally-threaded bore, and the rotor may have a threaded part which screws into the bore. This can allow tne S rotor to be attached to the shaft without requiring the shaft to pass through the centre of the ro:or, thereby reducing the shaft engtb. Furthermore, the need for a separate nut may be avoided, since the rotor itsef may fu.nction as a nu.t. This may provide a simpe, cost-effective arrangement which is robust and easy to assemble/disassemHe and to service.
Aternativey, other means of securing the rotor to the shaft could be provided. For example, the rotor could be pushed onto the shaft with an interference fit and secured with a pin, bolt or locking nut.
The rotor may comprise a neck for engagement with the shaft. The neck may be a part of the roTor which extends away from the main body of the rotor in an axia direction. The neck nay have a reduced diameter in comparison to the main body of the rotor (which may carry a magnet assembly). This can allovv the part which connects to the shaft to Have a smaller diameter, thereby reducing its rotating mass. Preferaby the neck Has a bore which is internaHy threaded for engagement with the shaft.
Preferably means are provided for locating the rotor axiaHy on the shaft. For exampe, the shaft may comprise one or more zones of unthreaded material, which may engage with one or more unthreaded zones inside a bore in the rotor. These "location" zones are preferaby dosey toeranced zones where the shaft and bore of the rotor are engaged axiaHy This may reduce the misaUgnment that may be associated with the thread alone being used to maintain a leve ofco-axiaHtyoftbetwo assemblies.
The present invention has particular appUcation in the fled ofturbocharging, and therefore the turbine system may be a turbocharger. In this case, the system may further comprise a compressor, which is preferaby arranged co-axiaHy with the turbine and the electrica macHine on the shaft. Preferahi*y the compressor is ocated between the turbine and the eectrica machine, so that the eectrica machine is located on a side of the compressor away from the turbine. This can allow the electrical machine to be located in a thermally more favourable environment.
A compressor in a turbocharger normally includes a compressor wheel, and a separate nut would normally be used to clamp the compressor wheel. However, in a preferred embodiment of the invention, the rotor itself is used as a clamping device to clamp the compressor wheel. This may help to improve the lightness and stiffness of the system.
Thus the compressor may comprise a compressor vvheel, and the rotor may be arranged to clamp the compressor wheel.
Where the turbine system is a turbocharger, the electrical machine may be located inside an air intake conduit whicb supplies intake air to tbe compressor. This may help to achieve a space-efficient design as vvell as helping with cooling of tbe macbine. The electrical machine may comprise a tapered housing to minimise disruption to the air flow.
Alternatively, the turbine system may be a turbogenerator. In this case the system may be used to generate electricity from the exhaust stream of the engine.
In order to assist with assembly of the system, the rotor may comprise a drive arranged to engage with an external tool for rotating the rotor relative to the shaft. The drive may be, for example, a recess in the rotor which is arranged to accommodate part of the tool. The drive may be located on tbe inside of the rotor, and may be accessible through an open end of the rotor. The external tool may be used to screw the rotor onto the shaft and/or to apply the necessary locking torque to the rotor to clamp the compressor wheel. This may be done either before or after the magnet assembly has been installed within the rotor, thus facilitating manufacture.
Alternatively the drive may comprise an exterior feature such as a hexagon form at one end of the rotor.
The electrical machine is preferably a permanent magnet machine. In this case a magnet assembly, comprising one or more permanent magnets, may be provided on the rotor. In a preferred embodiment of the invention, this is achieved by locating the magnet assembly inside the cup-shaped rotor (preferably in the main body of the rotor). This may provide a strong and convenient way of holding and retaining the magnet assem bly.
Preferably the rotor is arranged such that the magnet assembly can be inserted into the rotor after the rotor has been attached to the shaft. This can facilitate manufacture of the system and help to avoid damage to the magnet assembly.
By locating the magnet assembly inside the cup-shaped rotor, it may be possible for the magnet assembly to be attached to the inside of the rotor without the use of a rotor back-iron. Thus tbe rotor and magnet assembly may have a hollovv core. This can help to reduce further the rotor mass.
The magnet assembly may comprise a Halbach or quasi-Halbach arrangement, for example, a Halbach cylinder. Ho' a two-pole electrical machine this means that the magnet assembly may be a simple solid ring magnet which is parallel magnetized in one direction. This can allow a high level of magnetization to be achieved without the need for a rotor back-iron. Thus for a two-pole machine the rotor assembly may simply consist of two parts, a cup shaped rotor and a ring magnet. Such an arrangement can help to reduce the rotor mass while being robust and inexpensive to manufacture. Alternatively a plurality of magnets could be used to mimic the Halbach effect in which case the magnets mayfor example be in the form of segments.
For an electrical machine vvith a greater number of poles, a plurality of magnets could be used in a quasi-Halbach arrangement. For example, to produce a four-pole machine, the magnet assembly may comprise four main-pole magnets magnetized in the North-South direction, and preferably four interpole magnets magnetized in the West-East direction.
Preferably the rotor is provided vvith zones vvhere balancing material can be added or removed. These zones may be used for balancing the rotor as a piece part and also when the entire assembly is being balanced.
Preferably the electrical machine comprises a stator, and the rotor is arranged to rotate inside the stator, preferably with an air-gap between the two. The stator is preferably provided with stator windings. The machine is preferably operable either as a motor or as
S
a generator. When operating as a motor, the machine may increase the boost provided by the turbocharger, thus helping to reduce turbo lag. A/ben operating as a generator, tbe machine may convert excess energy in the exhaust gas stream into electrical energy, thereby increasing the overall efficiency of tbe engine.
In operation, the high rotational speed will cause air witbin the electrical machine to become heated. In order to reduce the impact of this, the rotor may comprise means for drawing air tbrougb the air-gap netween the rotor and the stator. For example, the rotor may comprise a spiral groove or protrusion arranged to use rotation of the rotor to onmpel air to travel through the air gap. This can assist with cooling of tbe electrical machine.
One or more channels may be provided in the electrical machine for allowing air from the air-gap to exit the machine. For example, in the case ofa turbocharger, the channels may allow air to exit to the compressor.
According to another aspect of the invention there is provided a method of manufacturing a turbine system for use in the exhaust stream ofan internal combustion engine, the method comprising arranging a turbine and an electrical machine co-axially on a shaft, wberein the electrical machine comprises a cup-shaped rotor, and the method comprises attaching the cup-shaped rotor to the shaft.
Features of one aspect of the invention may be applied to any otber aspect. Any of the apparatus features may be provided as metbod features and vice versa.
Preferred embodiments of the invention will now be described, purely by way of example, with reference to the accompanying drawings, in which: Figure 1 shows a turbine system in an embodiment of the invention; Figure 2 is a cross section through part of the turbine system of Figure 1; Figure 3 is an axial cross section through an electrical machine; and Figure 4 shows an alternative magnet assembly.
Figure 1 shovvs a turbine system in an embodiment of the invention, vvitb a cut-out segment to expose the internal components. In this embodiment the turbine system is a turbocharger for use with an internal combustion engine such as a petrol or diesel engine.
Referring to Figure l,the system incHdes a turbine 10 and a compressor 12. The turbine comprises a turbine whee 14 and a turbine housing 16. The compressor 12 comprises a compressor wheel 18 and a compressor Housing 20. The turbine whee 14 and S compressor wHee 18 are connected by a common shaft 22 located in bearing housing 24.
The shaft is supported by a bearing system 26.
n operation, exhaust gas from the engine enters the turbine 10 and is directed onto the turbine wHee 14 by tHe turbine housing 16. THe energy in the exHaust gas turns the turbine wHee 14, which in turn spins tHe compressor vvHeel 18 via the sHaft 22. As tHe compressor wHee spins, air is drawn in and compressed. THe compressed air exits the compressor and is supplied to the engine.
n tHe arrangement of Figure 1 an eectrica macHine 30 is integrated with tHe turbocharger. The eectrical macHine 30 is ocated on the side of tHe compressor 12 wHich is away from the turbine 10. The electrica macHine comprises a rotor 32 and a stator 34 with an air-gap between the two. The stator 34 is arranged inside a Housing 36. The electrical machine 30 is located inside an air intake conduit 38 wHicH suppUes intake air to the compressor 12. The Housing 36 is tapered to facilitate the passage of air.
Figure 2 is a cross section through part of tHe turbine system of Figure 1, showing tHe electrical machine 30 in more detail. Referring to Figure 2, the rotor 32 is cup-shaped, and comprises a hoHow cylinder which is closed at one end. A neck 40 extends in an axial direction from the closed end of the rotor, the neck having a smaHer diameter tHan the main body of the rotor. The neck 40 has a bore 42 wHicH is internaHy tHreaded. The threac of the bore 42 engages with a thread on the end of the shaft 22. The rotor is made of a ligHtweight high strength rrateria sucH as titanium. A magnet assemby (not shown in Figure 2) is ocated inside the main body of the rotor. The rotor 32 is arranged to Hold the magnetic assembly and to retain the magnetic assembly safey at high peripheral speeds.
n tHe present embodiment, ratHer tHan using a locking nut to Hod tHe rotor in place, tHe rotor i:self is used as tHe nut. This can avoid tHe need to increase the shaft ength and tHe overHung mass, wHicH wouH compromise tHe straigHtness and baance oftHe assemHy.
Furthermore, the rotor can also be used to clamp the compressor wheel. By using the rotor as the nut and clamping device, lightness and stiffness are achieved.
The rotor is provided with a drive 44 which is used to screw the rotor onto the shaft. The drive 44 is located in the rotor and can be accessed from the open side. During assembly, a driver is inserted to screw the rotor onto the shaft and to apply the necessary torque to clamp the compressor wheel. Alternatively an exterior feature such as a hexagon form at one end of the rotor could be used. The rotor can be assembled onto the shaft either before or after the magnet assembly has been inserted, thus facilitating ease of manufacture.
Figure 3 is an axial cross section tbrough the electrical machine 30. Referring to Figure 3, the electrical machine comprises rotor 32 inside stator 34. The stator 34 includes sta:or slots 35 for accommodating stator windings (not shown). A magnet assembly 46 is located inside the rotor 32.
In this embodiment the magnet assembly 46 is a Halbach cylinder. A Halbach cylinder is a magnetized cylinder composed of ferromagnetic material producing a magnetic field which is ideally confined vvithin:he cylinder. This allows tbe magnet assembly to be formed from a simple solid ring magnet which is parallel magnetised in one direction as shown in Figure 3. Alternatively a plurality of magnetic segments could be used to nimic the Halbach effect. The Halbach arrangement provides tbe advantage that a high level of magnetization can be achieved vvithout tbe need for a rotor back-iron, that is, the rotor can have a hollow core. This can help to reduce the rotor mass without impacting on the power level.
In the arrangement of Figure 3, the magnet assembly is magnetized from left to right as shown by the arrovv. This arrangement therefore produces a two-pole machine. However in some circumstances a machine with a greater number of poles may be desired.
Figure 4 shovvs an alternative magnet assembly for a four-pole machine. In the arrangement of Figure 4, the magnet assembly comprises four main-pole magnets 48 magnetized in the North-South direction, and four interpole magnets 50, magnetized in the West-East direction. This arrangement of magnets mimics the Halbach effect while giving the rotor four poes. t wiH be appreciated that other arrangement of magnets coud be used to give the rotor any desired number of poles.
Referring back to Pigure 2, the rotor is provided with zones 52 vvhere material can be S added or removed for balancing fine component as a piece part, and also when the entire assembly is being balanced. t is aso part of the design that the rotor when being assembled and tightened wiH align itsefto the rotor shaft at speciflc location' diameters 54. These are dosely toeranced zones where the shaft and bore of the rotor are engaged axiaHy. This may reduce the misaUgnrnent that may be associated witH the thread alone being used to maintain a leve of co-axiaHty of tHe two assemblies.
n operation the high rotationa speed wiH cause the machine to heat. In order to reduce the impact of this, the rotor is provided with a feature that causes air to be drawn through tHe air-gap, thus heping to coo the assembly. THis may be provided as a spiral feature that uses the rotation of the rotor to comp& air to trav& through the air gap. The air traves through to the compressor inet via channes within the stator.
n the embodiment described above, the electrica machine is integrated with a turbocHarger. However in another embodiment the eectrica machine is part ofa turbogenerator. A turbogenerator comprises a turbine couped to an eectrica macHine, and can be used to generate eectricity from the exhaust stream of an interna combustion engine. Thus in one embodiment the turbogenerator may resembe the turbocharger described ibove, but without the compressor.
Some of the advantages afforded by the present embodiments are as foUows: * Maximising the power acbievabe for a defined maximum rotor mass.
* CosL errecLive. H LHe cse ora 2-poe machine1 LHe roLor consisLs orLvvo parLs, d cup and a ring-magnet. Such a topoogy is robust and inexpensive to manufacture.
* Easy to assemble/disassembe and service.
* mproved lightness and stiffness a

Claims (12)

  1. CLAIMS1. A turbine system for use in the exhaust stream ofan interna combustion engine, the system comprising a turbine and an electrica machine arranged co-axiaHy on a shaft, wherein the electrical machine comprises a cup-shaped rotor.
  2. 2. A turbine system according to claim 1, vvherein tHe rotor comprises a HoHow cylinder whicH is at east partiaHy dosed at one end.
  3. 3. A turbine system according to claim 1 or 2, wherein the rotor is attached directly to tHe sHaft.
  4. 4. A turbine system according to any of tHe preceding daims, wherein tHe rotor is arranged for threaded engagement with the shaft.
  5. 5. A turbine system according to any of tHe preceding daims, wherein tHe rotor comprises an internally-thread bore whicH screws onto a threaded end of the shaft
  6. 6. A turbine system according to any of tHe preceding daims, wherein tHe rotor comprises a neck for engagement with the shaft.
  7. 7. A turbine system according to claim 6, wherein the neck has a reduced diameter in comparison to a main body of the rotor.
  8. 8. A turbine system according to claim 6 or 7, wherein the neck has a bore which is internaUy threaded for engagement with the shaft.
  9. 9. A turbine system according to any of the preceding daims, further comprising means for ocating the rotor axially on the shaft.
  10. 10. A turbine system according to claim 9, wherein the shaft comprises one or more zones of unthreaded materia which engage witH one or more untHreaded zones inside a bore in the rotor.
  11. 11. A turbine system according to any of the preceding daims, wherein the turbine system is a turbocharger.
  12. 12. A turbine system according to claim 11, further comprising a compressor.S13. A turbine system according to claim 12, wherein the compressor is ocated between the turbine and the eectrica machine.14. A turbine system according to claim 12 or 13, wherein the compressor comprises a compressor wHee, and the rotor is arranged to clamp the compressor wheeL 15. A turbine system according to any ofcaims 11 to 13, wherein the eectrical machine is ocated inside an air intake conduit which supplies intake air to the compressor.16. A turbine system according to claim 15, wherein the eectrica machine comprises a tapered housing.17. A turbine system according to any ofcaims ito 10, wherein tHe turbine system is a turbogenerator.18. A turbine system according to any of the preceding claims, wherein the rotor comprises a drive arranged to engage with an external too for rotating the rotor reative to the shaft.19. A turbine system according to claim 18, wherein the drive is a recess in the rotor which is arranged to accommodate part of the tooL 20. A turbine system according to claim 18 or 19, wherein the drive is accessible through an open end of the rotor.21. A turbine system according to any of the preceding cairns, further comprising a magnet assemby located inside the cup-shaped rotor.22. A turbine system according to clairri 21,wherein the rotor is arranged such that the magnet assembly can be inserted into the rotor after tHe rotor has been attached to the shaft.23. A turbine system according to claim 21 or 22, wherein the rotor and magnet assembly Have a hollow core.24. A turbine system according to any ofdaims 21 to 23, wherein the magnet assembly comprises a Halbach or quasi-Habach arrangement.25. A turbine system according to any ofcaims 21 to 24, wherein the magnet assembly comprises a Halbach cylinder.26. A turbine system according to any ofcaims 21 to 24, wherein the magnet assembly comprises a pkiraUty of magnets arranged to mimic the HalbacH effect.27. A turbine system according to any ofcaims 21 to 24, wHerein the magnet assembly comprises four main-pole magnets magnetized in the NortH-South direction, and preferaHy four interpoe magnets magnetized in the West-East direction.28. A turbine system according to any of the preceding claims, wherein tHe rotor is provided with zones where baancing materia can be added or removed.29. A turbine system according to any of the preceding daims, wherein the eec:rica machine comprises a stator, and the rotor is arranged to rotate inside tHe stator.30. A turbine system according to claim 29, wherein the rotor comprises means for drawing air through an air-gap between the rotor and the stator.31. A turbine system according to claim 30, wherein the rotor comprises a spira groove or protrusion arranged to use rotation of tHe rotor to compel air to trave tHrougH the air gap.32. A turbine system according to claire 30 or 31, further comprising one or more channels in the electrical machine for allowing air from the air-gap to exit the machine.33. A method of manufacturing a turbine system for use in the exhaust stream of an S internal combustion engine, the method comprising arranging a turbine and an electrical machine co-axially on a shaft wherein the electrical machine comprises a cup-shaped rotor, and the method comprises attaching the cup-shaped rotor to the shaft.34. A turbine system substantially as described herein with reference to and/or as illustrated in the accompanying drawings.35. A method of manufacturing a turbine system substantially as described herein \tvith reference to the accompanying drawings.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015185407A1 (en) * 2014-06-03 2015-12-10 Robert Bosch Gmbh Turbocharger having an electric machine
CN108533387A (en) * 2018-01-25 2018-09-14 中国第汽车股份有限公司 A kind of turbo charging installation of translator/generator
WO2019115632A1 (en) * 2017-12-13 2019-06-20 Luxembourg Institute Of Science And Technology (List) Compact halbach electrical generator for integration in a solid body
EP3921547B1 (en) * 2019-02-04 2024-03-13 IFP Energies nouvelles Device for compressing a fluid driven by an electric machine with a rotor equipped with a solid cylindrical magnet

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2354553A (en) * 1999-09-23 2001-03-28 Turbo Genset Company Ltd The Electric motor driven turbocharger.
US20030223892A1 (en) * 2002-05-30 2003-12-04 Woollenweber William E. Compact turbocharger

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20120425A1 (en) * 2012-08-02 2014-02-03 Ferrari Spa TURBOCHARGER PROVIDED WITH ELECTRIC MACHINE FOR A SUPER-POWERED INTERNAL COMBUSTION ENGINE

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2354553A (en) * 1999-09-23 2001-03-28 Turbo Genset Company Ltd The Electric motor driven turbocharger.
US20030223892A1 (en) * 2002-05-30 2003-12-04 Woollenweber William E. Compact turbocharger

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015185407A1 (en) * 2014-06-03 2015-12-10 Robert Bosch Gmbh Turbocharger having an electric machine
CN106460544A (en) * 2014-06-03 2017-02-22 罗伯特·博世有限公司 Turbocharger having electric machine
US10174669B2 (en) 2014-06-03 2019-01-08 Robert Bosch Gmbh Turbocharger including an electric machine
CN106460544B (en) * 2014-06-03 2019-03-08 罗伯特·博世有限公司 Turbocharger with motor
WO2019115632A1 (en) * 2017-12-13 2019-06-20 Luxembourg Institute Of Science And Technology (List) Compact halbach electrical generator for integration in a solid body
US11728708B2 (en) 2017-12-13 2023-08-15 Luxembourg Institute Of Science And Technology (List) Compact halbach electrical generator for integration in a solid body
CN108533387A (en) * 2018-01-25 2018-09-14 中国第汽车股份有限公司 A kind of turbo charging installation of translator/generator
EP3921547B1 (en) * 2019-02-04 2024-03-13 IFP Energies nouvelles Device for compressing a fluid driven by an electric machine with a rotor equipped with a solid cylindrical magnet

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