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
  • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
  • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders

Definitions

• the present invention relates to the field of electrical machines. It relates to a magnet wheel according to the preamble of claim 1.
• Such a magnet wheel is e.g. known from the document DE-A1-28 52 980.
• the laminated crown of laminated cores is connected by wedging to a wheel spider ("rotor spider") which is rotatably mounted about a central axis.
• the layered wedge usually consists of a wedge carrier, a wedge and one or more counter wedges (see, for example, EP-A1-0 334 020 or US-A-4, 143,457).
• the wheel star is a rigid structure consisting of two or more disks, the radial ribs (which can also be tilted out of the radial direction or arranged "oblique") and the wedge carriers (see, for example, FIG. 2 DE-A1-28 52 980).
• the ribs are welded to the washers and the wedge supports and therefore cannot function as "oblique" elements in the area of the connection to the layered ring, even with an "oblique” arrangement.
• the wedge is rigidly connected to the counter wedge (or counter wedges) by frictional engagement with the layered ring.
• the ring plates have rectangular recesses so that the wedge and counter wedge (s) can be accommodated. There may be two or more cutouts in the crown plate. One or more wedges can also be engaged per sheet.
• the wedge and wedge carrier can move relative to each other. This is important because without the possibility of relative movement, the mechanical stress on the wheel spider and the rotor rim during operation (centrifugal force, different temperature distribution in the layer rim and wheel spider) would be too high.
• a disadvantage of the known layered wedge wedging is, on the one hand, the relatively large design and manufacturing outlay caused by the wedge supports, wedges and counter wedges. On the other hand, the sliding movements between the wedge and the wedge carrier are difficult to control in practice. Finally, it is not uncommon for the layered ring to be shrunk onto the wheel spider (see, for example, US Pat. No. 4,143,457). As a result of the shrinkage, however, high mechanical stresses are induced in the wheel star when the magnet wheel (rotor) is at a standstill, which necessitates a more rigid and expensive construction of the wheel star.
• the object is achieved by the entirety of the features of claim 1.
• the essence of the invention is to design the wedges and the ring plates in such a way that they interlock with one another to form a rigid connection. This makes complicated division into wedges and counter wedges unnecessary and the connection between the layered ring and wedges is considerably simplified.
• a preferred embodiment of the magnet wheel according to the invention is characterized in that the wedges are dovetail-shaped on the side facing the layered ring and that the ring plates have recesses into which the wedges engage with their dovetail shape to form a rigid connection.
• the ring plates preferably each have a plurality of cutouts, each of the cutouts being delimited on one side by a dovetail-shaped support flank and on the other side by a flank arranged at right angles.
• the wheel star has oblique ribs and the wedges are firmly connected to the ribs, in particular welded.
• the wheel star has radial ribs, wedge carriers are fastened to the ribs, and the wedges are slidably mounted in the wedge carriers. Further embodiments result from the dependent claims.
• FIG. 1 shows a side view of a section of a magnet wheel with oblique ribs according to a first exemplary embodiment of the invention
• FIG. 2 shows the top view of the magnet wheel according to FIG. 1
• FIG. 4 shows, in a representation comparable to FIG. 2, a second exemplary embodiment of the pole wheel according to the invention with radially oriented ribs.
• FIG. 1 and 2 show a side view and a top view of a section of a pole wheel according to a first preferred embodiment of the invention for wheel rims with obliquely running spokes (ribs).
• the magnet wheel 10 which can be rotated about an axis 15, has a wheel star 11 with a plurality of obliquely ("oblique") outwardly extending ribs 12, each of which by means of wedges 13 with a ring plate 16, 16 ', 16 "(FIG. 3 ) constructed layered ring 14.
• the layered ring 14 surrounds the Edge star 11 concentric.
• the novel layered wedge only comprises a wedge 13, which has a dovetail shape (FIG. 2).
• the ring plates 16, 16 ', 16 " have recesses 18, one side of which - as before - has a rectangular shape, but the other side of which is dovetail-shaped (FIGS. 3 (a) to (c)). Only this support flank (17a, b in FIG. 2) can be used for the connection between the crown plate 16 and the wedge 13. Two or more cutouts 18 can occur in the crown plate 16, 16 ', 16 ". One or more wedges 13 can also be engaged per ring plate.
• the crown plate is designed according to FIG. 3 (a) (crown plate 16).
• the layered ring 14 is built up by mutual layering of the ring plates 16.
• the crown plate can also be designed according to FIG. 3 (b) (crown plate 16 ').
• the crown plate is also swept when stacking (crown plate 16 "in FIG. 3 (c)). Basically, any variation (two or more recesses 18, contact flank 17a, b left or right, one or more) Wedge (s) per ring plate in engagement).
• the principle here is always that the rigid connection between the wedge 13 and the layered ring 14 is due to the shape of the ring plates and the choice of the layering both on the left and on the right support flank 17a, b of the wedge 13.
• the rim plates 16, 16 ', 16 can be both lasered and punched.
• the wheel spider 11 In the area of the connection to the layer rim 14, the wheel spider 11 consists of ribs 12 arranged" oblique ", which are rigidly connected (eg welded) to the wedge 13 1 of DE-A1-28 52 980 in the area of the connection between the layered rim and the wheel spider is omitted, only with this arrangement can the ribs 12 actually function as "oblique" elements and reduce the mechanical see Strain in the wedge 13 and layered rim 14 during operation of the magnet wheel 10 (centrifugal force, different temperature distribution in the layered rim 14 and wheel spider 11).
• the advantages of the new layered wedge according to Fig. 1-3 are:
• FIGS. 4 and 5 Another preferred embodiment is shown in FIGS. 4 and 5.
• the layered wedge between wheel star 11 'and the layered ring in this pole wheel 10' each consists of a wedge carrier 19, which has the same shape as in the e.g. wedging known from DE-A1-28 52 980, and a wedge 13, which is identical to FIG. 2.
• the rigid connection between the layered ring and the wedge 13 is analogous to FIG. 2, and the shape of the ring plates 16 (or 16 ', 16 ") is the same as in FIG. 3.
• the wheel star 11' differs from the wheel star 11 from FIG. 2 in that the ribs 12 'are radial.
• this is the conventional type of wedging (with wedge and counter wedge ( en)) replaced, on the other hand the wedge 13 and the wedge carrier 19 can move relative to one another along sliding surfaces 20a, b.
• the rigid connection is thus combined with a dovetail-shaped wedge with a sliding bearing of the wedge in a wedge carrier.
• This exemplary embodiment does not work in the case of an "oblique" connection between the layered rim and the wheel star (oblique ribs).

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Iron Core Of Rotating Electric Machines (AREA)
• Permanent Field Magnets Of Synchronous Machinery (AREA)
• Manufacture Of Motors, Generators (AREA)
• Preparation Of Compounds By Using Micro-Organisms (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)
• Treatments Of Macromolecular Shaped Articles (AREA)
• Insulation, Fastening Of Motor, Generator Windings (AREA)
• Hydraulic Motors (AREA)
• Centrifugal Separators (AREA)
• Mutual Connection Of Rods And Tubes (AREA)

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Related Child Applications (1)

Publications (1)

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Citations (5)

Family Cites Families (14)

• 2001
  • 2001-11-22 EP EP01127822A patent/EP1315270A1/de not_active Withdrawn
• 2002
  • 2002-11-12 CA CA002467108A patent/CA2467108C/en not_active Expired - Fee Related
  • 2002-11-12 EP EP02803483A patent/EP1449288B1/de not_active Expired - Lifetime
  • 2002-11-12 AU AU2002366065A patent/AU2002366065A1/en not_active Abandoned
  • 2002-11-12 AT AT02803483T patent/ATE373890T1/de active
  • 2002-11-12 ES ES02803483T patent/ES2294204T3/es not_active Expired - Lifetime
  • 2002-11-12 RU RU2004118721/09A patent/RU2336620C2/ru not_active IP Right Cessation
  • 2002-11-12 CN CNB028233123A patent/CN100525011C/zh not_active Expired - Fee Related
  • 2002-11-12 WO PCT/IB2002/004720 patent/WO2003044925A1/de not_active Ceased
  • 2002-11-12 DE DE50210941T patent/DE50210941D1/de not_active Expired - Lifetime
  • 2002-11-12 JP JP2003546457A patent/JP2005510196A/ja active Pending
  • 2002-11-12 SI SI200220039A patent/SI21483A/sl not_active IP Right Cessation
• 2004
  • 2004-05-18 US US10/847,474 patent/US6965187B2/en not_active Expired - Fee Related

Patent Citations (5)

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