EP1840025B1 - Elektrisches Antriebssystem - Google Patents

Elektrisches Antriebssystem Download PDF

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Publication number
EP1840025B1
EP1840025B1 EP07105268.2A EP07105268A EP1840025B1 EP 1840025 B1 EP1840025 B1 EP 1840025B1 EP 07105268 A EP07105268 A EP 07105268A EP 1840025 B1 EP1840025 B1 EP 1840025B1
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EP
European Patent Office
Prior art keywords
propeller
rotor
cylinder
electric motor
group
Prior art date
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Active
Application number
EP07105268.2A
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English (en)
French (fr)
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EP1840025A3 (de
EP1840025A2 (de
Inventor
Flavio Novelli
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Goriziane Group SpA
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Goriziane Group SpA
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Publication date
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Publication of EP1840025A2 publication Critical patent/EP1840025A2/de
Publication of EP1840025A3 publication Critical patent/EP1840025A3/de
Application granted granted Critical
Publication of EP1840025B1 publication Critical patent/EP1840025B1/de
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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:
  • the ship With the traditional propulsion method, the ship is only able to change its course with the rudder. With the propeller-electric motor system it is possible to make the ship rotate upon itself even without it being in motion, since it is sufficient to rotate the propeller with respect to the axis of the ship and thus perform the necessary thrust making the propeller itself move.
  • the Applicant has tackled the problem of reducing the bulk for the electrical moving systems of propellers or Archimedean screws, for example in the field of shipping but not only here.
  • the Applicant has made an electrical traction system using a propeller or Archimedean screw in which the propeller or the Archimedean screw 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 having the features according to claim 1.
  • the documents US5252875 and US2003/186601 disclose a submersible propulsion unit having the features according to the preamble of claim 1. Further purposes and advantages of the system according to the present invention shall become clearer from the following description and from the attached drawings, provided purely as a non-limiting example, in which:
  • 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 1 a and 1 b, 2 a and 2 b and 3 a and 3 b illustrate three possible embodiments for such a propeller group and in particular in figures 1 a and 1 b 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 2 a and 2 b 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 3 a and 3 b 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 4 a and 4 b 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.
  • shackles 34 matching those arranged on the inner cylinder of the propeller group can be seen.
  • FIGs 5 a and 5 b 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 6 a and 6 b 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 7 a and 7 b 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 6 a and 6 b; 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 8 a and 8 b represent the unit of the propeller of figures 1 a and 1 b of the rotor of figures 6 a and 6 b and of the stator of figures 7 a and 7 b 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.
  • 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.

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)

Claims (8)

  1. Elektrisches Antriebssystem, Folgendes umfassend:
    - eine Propellergruppe (2, 2', 2''), die aus einem inneren Hohlzylinder (21, 21', 21'') gebildet ist, in dem mindestens ein Propeller oder eine archimedische Schraube koaxial zu dem Zylinder fest angebracht ist, so dass sich sowohl der Propeller oder die archimedische Schraube selbst als auch der Zylinder gemeinsam um die Achse drehen können,
    - einen zylindrischen Rotor (3, 5) eines Elektromotors, in dessen Innerem eine solche Propellergruppe koaxial angeordnet ist,
    - und einen zylindrischen Stator (4, 6), der auf dem Rotor montiert ist, so dass ein Elektromotor gebildet wird, bei dem der Rotor hohl und zylindrisch ist und der Propeller oder die archimedische Schraube in seinem Inneren angeordnet ist und sich mit dem Rotor dreht, dadurch gekennzeichnet, dass:
    - der Rotor ein zylindrischer Rotor (3) eines Transversalfluss- und Permanentmagnet-Elektromotors ist, der mit einer Vielzahl von Magneten (31) versehen ist, die mit Hilfe von Verriegelungsabschnitten (32) positioniert sind und wobei die Pole (33) an dem inneren Mittelteil des Zylinders befestigt sind; wobei
    - der Elektromotor mit Permanentmagneten aus seltenen Erden versehen ist;
    - der zylindrische Stator (4, 6) eine Vielzahl von gesinterten ferromagnetischen Modulen umfasst.
  2. System gemäß Anspruch 1, wobei eine solche Propellergruppe (2) einen inneren Zylinder (21) und drei Flügel (22) umfasst, die mindestens die Hälfte der verfügbaren Fläche ausmachen, die auf drei um 120° versetzte Achsen angeordnet und an einem solchen Zylinder befestigt sind.
  3. System gemäß Anspruch 1, wobei eine solche Propellergruppe (2') drei verschiedene Propeller (22') umfasst, die fest an derselben Welle und demselben Zylinder (21') befestigt sind, wobei jeder Propeller aus vier Flügeln gebildet ist.
  4. System gemäß Anspruch 1, wobei eine solche Propellergruppe (2'') einen Propeller mit vier Flügeln (22'') umfasst, die schwenkbar sind, da sie gelenkig und mit Rollen ausgestattet sind, auf denen sie auf einer Zentralnabe gleiten, und die durch einen geeigneten Exzenterhebel (24) am Endteil des Flügels angesteuert werden.
  5. System gemäß Anspruch 1, wobei der Zylinder (21, 21', 21'') durch geeignete Schäkel (23, 23', 23'') an zusammenpassenden Schäkeln befestigt ist, die an der Innenfläche des Rotors des Elektromotors angeordnet sind.
  6. System gemäß Anspruch 1, wobei ein solcher Stator (4) aus vielen untereinander gleichen Modulen besteht, die durch Schikanen (41) befestigt sind, die zwischen zwei konzentrischen Verriegelungszylindern (42) angeordnet sind, welche die Erregerspulen (43) mit den Polerweiterungen (44) tragen.
  7. System gemäß Anspruch 1, wobei die Propellergruppe, der Rotor und die Statorgruppe in einer geeigneten Tragabdeckung angeordnet sind und in dem Fall, in dem das System auf ein Schiff angewendet wird, unter dem Schiffsrumpf selbst platziert werden.
  8. System gemäß Anspruch 7, wobei die Struktur, die den Propeller und den Elektromotor trägt, im vorderen Teil trichterförmig ausgebildet ist und die Aufgabe hat, den Wasserstrom zum Propeller zu leiten.
EP07105268.2A 2006-03-31 2007-03-29 Elektrisches Antriebssystem Active EP1840025B1 (de)

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 EP1840025A2 (de) 2007-10-03
EP1840025A3 EP1840025A3 (de) 2014-06-04
EP1840025B1 true EP1840025B1 (de) 2020-04-15

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EP07105268.2A Active EP1840025B1 (de) 2006-03-31 2007-03-29 Elektrisches Antriebssystem

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IT (1) ITMI20060632A1 (de)

Families Citing this family (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 (de) * 2011-11-18 2013-05-22 Hamilton Sundstrand Corporation Felgenbetriebenes Strahlruder mit Transversalflussmotoren
JP2016117457A (ja) 2014-12-24 2016-06-30 ヤマハ発動機株式会社 回転電機装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020074891A1 (en) * 2000-12-18 2002-06-20 Otis Elevator Company Fabricated components of transverse flux electric motors

Family Cites Families (6)

* 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
EP0169682B1 (de) * 1984-07-13 1991-06-05 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
DE59702169D1 (de) * 1996-01-23 2000-09-21 Holger Kranert Gondelpropelleranlage
US5722864A (en) * 1996-06-24 1998-03-03 Andiarena; Oscar Marine propulsion system
US6692319B2 (en) * 2002-03-29 2004-02-17 Alstom Shilling Robotics Thruster for submarine vessels

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020074891A1 (en) * 2000-12-18 2002-06-20 Otis Elevator Company Fabricated components of transverse flux electric motors

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KASTINGER G: "DESIGN OF A NOVEL TRANSVERSE FLUX MACHINE", INTERNET CITATION, 29 July 2004 (2004-07-29), XP002673681, Retrieved from the Internet <URL:http://web.archive.org/web/20040729060046/http://www.ansoft.com/news/articles/Design_of_Tranverse_Flux_Machine.pdf> [retrieved on 20120411] *

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Publication number Publication date
ITMI20060632A1 (it) 2007-10-01
EP1840025A3 (de) 2014-06-04
EP1840025A2 (de) 2007-10-03

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