EP0506660A1 - Machine electrique a excitation par aimants permanents, en particulier a grande vitesse de rotation - Google Patents

Machine electrique a excitation par aimants permanents, en particulier a grande vitesse de rotation

Info

Publication number
EP0506660A1
EP0506660A1 EP90913400A EP90913400A EP0506660A1 EP 0506660 A1 EP0506660 A1 EP 0506660A1 EP 90913400 A EP90913400 A EP 90913400A EP 90913400 A EP90913400 A EP 90913400A EP 0506660 A1 EP0506660 A1 EP 0506660A1
Authority
EP
European Patent Office
Prior art keywords
bale
rotor
recesses
permanent magnet
electrical machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP90913400A
Other languages
German (de)
English (en)
Inventor
Horst KÜMMLEE
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP0506660A1 publication Critical patent/EP0506660A1/fr
Ceased legal-status Critical Current

Links

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
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets

Definitions

  • the permanent magnets (5) arranged on the Stator body (3) of the rot and spacers (6) of non-magnetic material are held by a facing (7) of sturdy, fiber-reinforced plastic in the air gap (9).
  • this facing (7) expands to a greater extent than the Stator body (3) of the rotor (1), even if it is prestresse and hence imbalances may arise.
  • the outer surface (4) of t Stator body (3) is divided up over its entire axial length by recesses (11) and the radial elasticity of the stator body (3) is approx mately matched to that of the facing (7) with the permanent magnets (5) by Special structural measures.
  • F smaller radii further rounded recesses (16) may also be provided.
  • Such a rotor of a permanent-magnet-excited electric machine especially suitable for high rotation speeds.
  • the outer surface (4) of the rotor bale (3) is divided over the entire axial length by recesses (11) and the tensile stiffness of the rotor bale (3) in the radial direction is approximated by special structural measures Rigidity of the bandage (7) adjusted with the permanent magnets (5).
  • the recess (11) form radially outer slots (12) and have rounded extensions (14, 1) on the radially inner side for the purpose of notch-freeness. Additional rounded recesses (16) can also be provided on a smaller radius.
  • Such a gate of a permanent magnet excited electrical machine is especially suitable for high-speed machines.
  • the invention relates to a permanent magnet-excited electrical machine, in particular high speed, in which the permanent magnets and filler pieces made of non-magnetic material arranged on the rotor bale of the rotor are held by a bandage made of high-strength, fiber-reinforced, in particular carbon-reinforced, plastic located in the air gap.
  • Such a permanent magnet-excited electrical machine is known from DE-OS-32 24 904. Since highly permanent permanent magnets cannot be used as load-bearing material due to their internal structure, but are sensitive to shock loads and tensile stresses, the permanent magnets used to excite the known electrical machine and the filler pieces made of non-magnetic material for the pole gaps on the rotor bale of the rotor are either included a jacket made of high-strength, non-magnetic metals or held together by a bandage made of fiber-reinforced, in particular carbon-reinforced plastic (CFRP) under tension.
  • CFRP carbon-reinforced plastic
  • the pretensioning of the jacket or the bandage is produced either by wedging or by the thread pull during the winding of the bandage. Wedging is complex and an increase in the bandage thickness is limited by the electrically prescribed maximum dimensions of the air gap between the stator and the rotor of the electrical machine in which the bandage is located.
  • the outer surface of the rotor bale facing the bandage is divided in the circumferential direction by a plurality of cutouts which extend over the entire axial length, and the expansion stiffness is achieved by special design measures speed of the sub-areas of the runner bale in the radial direction is approximately adapted to the elastic stiffness of the bandage with the permanent magnets.
  • the adjustment of the radial stiffness of the partial areas of the runner bale can be achieved in that the radially outer part of the recesses each form a slot which opens onto the surface of the runner bale facing the bandage, while the radially inner part of the The recess is widened and has a rounded contour with a sufficiently large notch radius.
  • the outer surface 3 of the runner bale is thus interrupted by the slots and the remaining webs between the recesses can yield to the stresses caused by the centrifugal force by bending and thus follow the deformation path of the bandage with the permanent magnets without play, without causing excessive stresses in the runner bale.
  • the rounded contour of the radially inner extensions of the cutouts also results in a low notch stress transition from the interrupted area to the undivided area of the bale.
  • the number and shape of the cutouts and in particular the length and shape of the slots are selected such that the partial areas of the rotor bale are slightly softer than the bandage, so that there is always a residual contact pressure of the permanent magnets on the rotor bale at all operating speeds or circumferential speeds is guaranteed. It is recommended that the slots open into the area of the pole gap.
  • the slots in the radial plane can advantageously have a curved curve shape which is approximately tangentially directed at the junction with the surface of the rotor bale.
  • the partial areas of the runner bale lying between the slots can then, like a spoke, cause the outer diameter of the runner bale to expand when the centrifugal force is slightly turned relative to the inside diameter, without excessive tangential stresses occurring in the process.
  • the runner bale in the case of slits shaped in this way as a laminated body, which is therefore composed of dynamo sheets which can be punched and / or cut.
  • This not only simplifies the production of the recesses with the complicated shapes of the enlargement and the slots (e.g. by erosion), but also enables the deformation energy in the centrifugal force to be absorbed simply by bending over the high one Edge of the sheet metal web between the slots.
  • the radially inner part of the sheet of the bale is therefore not as highly stressed as that of a closed disc.
  • the number of recesses and their curve shape will be selected so that the rotor bale is subjected to the same stress in all cross-sections and that the guidance of the magnetic excitation field is not impaired.
  • the sheets of the runner bale should open just as much under the centrifugal force as the bandage with the permanent magnets.
  • the slot widths over the radius can also be selected in connection with the pretensioning of the bandage so that when the bandage is at a standstill, the slits are compressed by the pretensioning of the bandage, so that the stress on the nominal speed is reduced.
  • radially acting spring elements which are located between the rotor bale and the permanent magnets, can also be arranged in the recesses open to the outer surface, which form the partial regions of the rotor bale or filling Support 5 pieces. The occurrence of imbalances is then avoided by the spring force.
  • FIGS. 1 to 4 of the drawing show a part of a radial section through the rotor, designed according to the invention, of a high-speed permanent magnet-excited electrical machine.
  • the same reference numerals are used for the same parts.
  • the rotor 1 of a permanent-magnet high-speed electrical machine consists of a rotor bale 3 arranged on the shaft 2 and made of magnetic material, which is used to conduct the magnetic flux.
  • the rotor bale 3 can be of solid construction, made of steel or composed of dynamo sheets.
  • ring sector-shaped permanent magnets 5 are arranged on the outer surface 4 of the rotor bale 3, between which also ring sector-shaped filler pieces 6 made of non-magnetic material, such as. As aluminum, are arranged, which form the pole gaps.
  • These permanent magnets 5 and filler pieces 6 are held on the surface 4 of the runner bale 3 by a bandage 7 which consists of plastic which is reinforced with carbon fibers (CFRP) and, in the hardened state, a high-strength bandage which is under tension 7 forms, which presses the permanent magnets 5 and filler 6 firmly against the surface 4 of the bale 3.
  • CFRP carbon fibers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

Dans le cas de machines à excitation par aimants permanents, les aimants permanents (5) et pièces intercalaires (6) en métal amagnétique disposés sur le corps (3) du rotor sont retenus par une frette (7) située dans l'entrefer (9), laquelle est en matière plastique renforcée par fibres de résistance élevée. Lorsque la machine tourne, cette frette (7) s'élargit plus fortement que le corps (3) du rotor (1), même si elle est précontrainte, de telle façon qu'il peut y avoir des défauts d'équilibre. Pour maintenir le centrage, la surface externe (4) du corps de rotor (3) est subdivisée, selon l'invention, sur toute la longueur axiale par des évidements (11) et la rigidité d'extension du corps de rotor (3) en sens radial est adaptée, par des mesures de construction particulières, de manière approximative à la rigidité de la frette (7) avec les aimants permanents (5). Les évidements (11) forment des fentes (12) radialement extérieures et ont radialement à l'intérieur des extensions (14, 15) arrondies pour éviter l'effet d'entaille. Sur un rayon plus petit, on peut encore prévoir des évidements arrondis (16) supplémentaires. Un tel rotor d'une machine électrique à aimants permanents convient en particulier à des machines à grande vitesse de rotation.
EP90913400A 1989-12-22 1990-09-13 Machine electrique a excitation par aimants permanents, en particulier a grande vitesse de rotation Ceased EP0506660A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3943237 1989-12-22
DE3943237A DE3943237A1 (de) 1989-12-22 1989-12-22 Permanentmagneterregte elektrische maschine, insbesondere hoher drehzahl

Publications (1)

Publication Number Publication Date
EP0506660A1 true EP0506660A1 (fr) 1992-10-07

Family

ID=6396571

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90913400A Ceased EP0506660A1 (fr) 1989-12-22 1990-09-13 Machine electrique a excitation par aimants permanents, en particulier a grande vitesse de rotation

Country Status (3)

Country Link
EP (1) EP0506660A1 (fr)
DE (1) DE3943237A1 (fr)
WO (1) WO1991010277A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142461C2 (de) * 1991-12-20 1997-06-05 Piller Gmbh Co Kg Anton Rotor für permanentmagneterregte elektrische Maschinen hoher Drehzahl sowie mit diesem Rotor konfektionierte elektrische Maschine
US5402024A (en) * 1992-04-06 1995-03-28 Matsushita Electric Industrial Co., Ltd. Rotor for a permanent-magnet motor
DE4320894C2 (de) * 1993-06-24 1995-09-07 Piller Gmbh Co Kg Anton Rotor für elektrische Maschinen und Verfahren zur Herstellung desselben
WO1996012336A1 (fr) * 1994-10-14 1996-04-25 Honda Giken Kogyo Kabushiki Kaisha Rotor pour machine rotative, son procede de fabrication et unite a aimant
DE19643791A1 (de) * 1996-10-30 1998-04-23 Manfred Dr Ing Kuchenbecker Stellmotor
DE10153433A1 (de) * 2001-10-30 2003-05-22 Siemens Ag Anordnung eines Ringmagneten
DE10203272A1 (de) * 2002-01-29 2003-07-31 Bosch Gmbh Robert Rotor für eine elektrische Maschine
DE10224776A1 (de) * 2002-06-04 2004-03-11 Magnet-Motor Gesellschaft Für Magnetmotorische Technik Mbh Elektrische Maschine
DE102004002326A1 (de) * 2004-01-16 2005-08-04 Forschungszentrum Jülich GmbH Rotor
DE102004042927A1 (de) * 2004-09-02 2006-03-09 Heinz Leiber Läufer für eine elektrische Maschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242610A (en) * 1978-12-26 1980-12-30 The Garrett Corporation Wedge-shaped permanent magnet rotor assembly
DE3224904C2 (de) * 1982-07-03 1986-11-06 Dornier System Gmbh, 7990 Friedrichshafen Gepanzerter Rotor für permanentmagnetisch erregte Drehfeldmaschinen
DE8427704U1 (de) * 1984-09-20 1986-01-23 Robert Bosch Gmbh, 7000 Stuttgart Rotor für eine elektrische Maschine
DE3510985A1 (de) * 1985-03-22 1986-09-25 Siemens AG, 1000 Berlin und 8000 München Elektrische maschine synchroner bauart mit dauermagneterregung
US4742259A (en) * 1987-05-11 1988-05-03 Franklin Electric Co., Inc. Permanent magnet rotor for electric motor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9110277A1 *

Also Published As

Publication number Publication date
WO1991010277A1 (fr) 1991-07-11
DE3943237A1 (de) 1991-06-27

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