EP1840025A2 - Système de traction électrique - Google Patents

Système de traction électrique Download PDF

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Publication number
EP1840025A2
EP1840025A2 EP07105268A EP07105268A EP1840025A2 EP 1840025 A2 EP1840025 A2 EP 1840025A2 EP 07105268 A EP07105268 A EP 07105268A EP 07105268 A EP07105268 A EP 07105268A EP 1840025 A2 EP1840025 A2 EP 1840025A2
Authority
EP
European Patent Office
Prior art keywords
propeller
rotor
cylinder
electric motor
stator
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.)
Granted
Application number
EP07105268A
Other languages
German (de)
English (en)
Other versions
EP1840025A3 (fr
EP1840025B1 (fr
Inventor
Flavio Novelli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goriziane Group SpA
Original Assignee
Goriziane SpA
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 Goriziane SpA filed Critical Goriziane SpA
Publication of EP1840025A2 publication Critical patent/EP1840025A2/fr
Publication of EP1840025A3 publication Critical patent/EP1840025A3/fr
Application granted granted Critical
Publication of EP1840025B1 publication Critical patent/EP1840025B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/16—Propellers having a shrouding ring attached to blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/16—Propellers having a shrouding ring attached to blades
    • B63H2001/165—Hubless propellers, e.g. peripherally driven shrouds with blades projecting from the shrouds' inside surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H3/00—Propeller-blade pitch changing

Definitions

  • the present invention concerns an electrical traction system for example that can be used for shipping applications.
  • the propeller-electric motor association which is placed directly in the sea, has substantial advantages:
  • Queen Mary II has two fixed motors and two that can rotate, according to requirements, even by 360°; this type of selection substantially increases the manoeuvrability of the ship.
  • the Applicant has tackled the problem of reducing the bulk for the electrical moving systems of propellers or volutes, for example in the field of shipping but not only here.
  • the Applicant has made an electrical traction system using a propeller or volute in which the propeller or the volute are ducted in an inner cylinder also having the function of a rotor for an electric motor and an outer cylinder coaxial to such an inner cylinder having the function of a stator of the electric motor.
  • An aspect of the present invention concerns an electrical traction system characterised in that it comprises a propeller group formed from an inner hollow cylinder inside which at least one propeller is fixedly connected coaxial to said cylinder, so that the propeller itself and the cylinder can rotate together around said axis, a cylindrical rotor of an electric motor inside which such an inner cylinder is coaxially arranged provided with a propeller and a cylindrical stator fitted onto said rotor, in such a way making an electric motor in which the rotor is hollow and cylindrical and a propeller is arranged inside it that rotates with said rotor.
  • the traction system 1 is made through substantially three parts that can be assembled together.
  • the system comprises a propeller group formed from an inner hollow cylinder inside which at least one propeller is arranged coaxial to said cylinder, so that the propeller itself and the cylinder can rotate together around said axis.
  • the system comprises a cylindrical rotor of an electric motor inside which such an inner cylinder is coaxially arranged provided with a propeller and a cylindrical stator fitted onto said rotor.
  • the unit makes an electric motor in which the rotor is hollow and cylindrical and a propeller is arranged inside of it that rotates together with said rotor.
  • Figures 1a and 1b, 2a and 2b and 3a and 3b illustrate three possible embodiments for such a propeller group and in particular in figures 1a and 1b the propeller group 2 is formed from an inner cylinder 21 and from three blades 22, which occupy at least half the available surface, arranged on three axes staggered by 120° and fixed onto the cylinder; the cylinder is in turn fixed through suitable shackles 23 to a rotor of the electric motor.
  • Figures 2a and 2b illustrate a propeller group 2' formed from three distinct propellers 22' but fixedly connected to the same shaft and the same cylinder 21'.
  • Each propeller is formed from four blades, with accentuated hydrodynamic shape, preferably with a structure that is much longer than it is wide; in total there are twelve blades and they have the purpose of optimising the yield of the overall propeller; this propeller structure could advantageously replace the propellers of maximum size currently foreseen (a size that is around eight metres and over in diameter) and that are made at this time for high powers, but with very long processing times and high costs.
  • the cylinder 21' is in turn fixed through suitable shackles 23' to a rotor of the electric motor.
  • Figures 3a and 3b represent a propeller group 2" formed from a propeller with four blades 22" that can swivel since they are hinged and equipped with rollers, on which they slide, on the central hub and they are commanded by a suitable eccentric lever 24 on the end part of the blade.
  • the cylinder 21" is in turn fixed through suitable shackles 23" to a rotor of the electric motor.
  • Figures 4a and 4b illustrate a cylindrical rotor 3 of a permanent magnet electric motor with transversal flow having a plurality of magnets 31 positioned through the help of locking sectors 32 having the poles 33 fixed onto the inner central part of the cylinder.
  • the excitation coils of the stator are arranged and the rotation of the propeller is obtained from the interaction of the two.
  • FIGs 5a and 5b illustrate the unit of the stator 4 that can be coupled with the rotor of figure 4, without the excitation coils for the sake of ease of representation.
  • the stator is made with many modules that are the same as each other, fixed by baffles 41 arranged between the two concentric locking cylinders 42, which support the excitation coils 43 with the polar expansions 44; the ferromagnetic modules are preferably made from sintered material, in order to also be able to use high frequencies to optimise the electrical yield.
  • Figures 6a and 6b illustrate a rotor 5 for a polyphase asynchronous motor, in which ring cages 51 and radial fittings 52 for them are highlighted. Moreover, on the inner surface of the rotor, shackles 54 matching those arranged on the inner cylinder of the propeller group can be seen.
  • Figures 7a and 7b illustrate the stator 6, supported by brackets 61 that are welded to a support ring 62 in turn locked onto the outer ring 63 that supports the stator, and that corresponds to the asynchronous rotor of figures 6a and 6b; in this case a rotating magnetic field is made using a polyphase system with the electrical windings distributed in the suitable recesses 64, formed in the ferromagnetic body 65.
  • Figures 8a and 8b represent the unit of the propeller of figures 1a and 1b of the rotor of figures 6a and 6b and of the stator of figures 7a and 7b according to the present invention.
  • the rotor is assembled, the propeller-holding cylinder assembled with the rotor-carrying cylinder and the two cylinders are inserted one inside the other and suitably attached to each other.
  • a single unit is thus obtained: propeller-rotor of the electric motor.
  • the propeller-rotor group is inserted into the stator of the asynchronous electric motor obtaining the ship traction system visible in figure 8.
  • the two cylinders, asynchronous motor stator and rotor-propeller, are joined together preferably through rolling bearings, which allow the rotor to slide with respect to the stator.
  • the selection of the two cylinders is not essential since, again in the field of the present invention, it is possible to use a single cylinder having fixed, in the inner wall, a propeller and, in the outer wall, the rotor of the electric motor.
  • the selection of the two cylinders shortens the overall processing times since it is possible to work simultaneously on propeller and rotor.
  • the unit of the various elements is arranged in a suitable support cover, is placed, in the case in which the system of the present invention is applied to a ship, under the hull of the ship substantially in the position foreseen for traditional traction systems.
  • the traction system 1 according to the present invention is applied to a submarine S, under the hull and in the traditional position in which the propellers are arranged.
  • the system according to the present invention has the special feature of being symmetrical in the planes perpendicular to each other quoted previously. In this way the electric motor completely circles the propeller, which is made to rotate by the rotor of the electric motor itself.
  • the propeller is located inside the electric motor so, at its rear, there is no mass that can disturb the flow of water; in this way the maximum possible thrust is obtained.
  • the structure that supports the propeller and the electric motor is made, in the front part, preferably funnel-shaped and has the task of conveying the flow of water towards the propeller; it is therefore possible to increase the number of rotations of the propeller compared to traditional systems, since the flow of liquid is not able to escape at the side of the propeller itself.
  • the liquid is thus completely expelled from the rear part, with an increase in thrust compared to a normal propeller and thus taking on the advantages of ducted propellers compared to traditional propellers.
  • the diameter of the electric motor is quite large compared to known systems since it must support the propeller inside it.
  • the increase in diameter corresponds to an increase in the circumference of the motor and therefore the possibility of increasing the number of magnetic poles that can be used for the formation of the power of the motor itself; moreover, the greater the diameter, the greater the mechanical torque applied to the propeller.
  • the diameter of the electric motor is doubled, the linear availability for arrangement of the magnetic poles is also doubled for the same number of revolutions of the motor, and since the distance travelled is also doubled, the power of the motor itself becomes four times the power of the original motor.
  • a higher linear development of the motor also allows a better dissipation of the heat produced by the Joule effect in the electrical circuits of the stator.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP07105268.2A 2006-03-31 2007-03-29 Système de traction électrique Not-in-force EP1840025B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000632A ITMI20060632A1 (it) 2006-03-31 2006-03-31 Sistema di trazione elettrica

Publications (3)

Publication Number Publication Date
EP1840025A2 true EP1840025A2 (fr) 2007-10-03
EP1840025A3 EP1840025A3 (fr) 2014-06-04
EP1840025B1 EP1840025B1 (fr) 2020-04-15

Family

ID=38226620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07105268.2A Not-in-force EP1840025B1 (fr) 2006-03-31 2007-03-29 Système de traction électrique

Country Status (2)

Country Link
EP (1) EP1840025B1 (fr)
IT (1) ITMI20060632A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8299669B2 (en) 2010-10-18 2012-10-30 Hamilton Sundstrand Corporation Rim driven thruster having transverse flux motor
EP2594477A1 (fr) * 2011-11-18 2013-05-22 Hamilton Sundstrand Corporation Propulseur à entraînement circonférentiel doté d'un moteur à flux transversal
US20160185431A1 (en) * 2014-12-24 2016-06-30 Yamaha Hatsudoki Kabushiki Kaisha Rotating electrical machine apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE443545B (sv) * 1984-01-26 1986-03-03 Philip Jochum Anordning vid tryckalstrare for vetska
DE3583078D1 (en) * 1984-07-13 1991-07-11 John Leishman Sneddon Fluidmaschine.
US5252875A (en) * 1990-08-23 1993-10-12 Westinghouse Electric Corp. Integral motor propulsor unit for water vehicles with plural electric motors driving a single propeller
EP0786402B1 (fr) * 1996-01-23 2000-08-16 Holger Kranert Unité de propulsion dans une nacelle
US5722864A (en) * 1996-06-24 1998-03-03 Andiarena; Oscar Marine propulsion system
US6952068B2 (en) * 2000-12-18 2005-10-04 Otis Elevator Company Fabricated components of transverse flux electric motors
US6692319B2 (en) * 2002-03-29 2004-02-17 Alstom Shilling Robotics Thruster for submarine vessels

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8299669B2 (en) 2010-10-18 2012-10-30 Hamilton Sundstrand Corporation Rim driven thruster having transverse flux motor
EP2594477A1 (fr) * 2011-11-18 2013-05-22 Hamilton Sundstrand Corporation Propulseur à entraînement circonférentiel doté d'un moteur à flux transversal
US20160185431A1 (en) * 2014-12-24 2016-06-30 Yamaha Hatsudoki Kabushiki Kaisha Rotating electrical machine apparatus
US10486784B2 (en) * 2014-12-24 2019-11-26 Yamaha Hatsudoki Kabushiki Kaisha Rotating electrical machine apparatus
US10840769B2 (en) 2014-12-24 2020-11-17 Yamaha Hatsudoki Kabushiki Kaisha Rotating electrical machine apparatus

Also Published As

Publication number Publication date
EP1840025A3 (fr) 2014-06-04
ITMI20060632A1 (it) 2007-10-01
EP1840025B1 (fr) 2020-04-15

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