WO1999059232A1 - Moteur electrique avec rotor excite par des bobines - Google Patents

Moteur electrique avec rotor excite par des bobines Download PDF

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Publication number
WO1999059232A1
WO1999059232A1 PCT/DE1999/001339 DE9901339W WO9959232A1 WO 1999059232 A1 WO1999059232 A1 WO 1999059232A1 DE 9901339 W DE9901339 W DE 9901339W WO 9959232 A1 WO9959232 A1 WO 9959232A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil
pole
electrical machine
machine according
rotor
Prior art date
Application number
PCT/DE1999/001339
Other languages
German (de)
English (en)
Inventor
Oskar Schneider
Norbert Keyssner
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1999059232A1 publication Critical patent/WO1999059232A1/fr

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
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors

Definitions

  • the invention relates to an electrical machine with a stator and with a rotating rotor arranged therein, which has a number of pronounced poles and electrical coils for generating magnetic field vortices acting between the rotor and the stander.
  • the machine is particularly suitable for use with a highly polar rotor arrangement. Such is usually done in a low peripheral speed generator, e.g. used in a wind turbine.
  • Another disadvantage of the known electrical machine is the high amount of material required for winding the coil. This is based on the comparatively large cross 2 cut the pole coil, which requires a correspondingly large wire length per turn. In addition, the average length of wire required per turn increases with the number of winding layers, since an external winding layer spans an area that is larger than the coil cross-section. Especially since the number of coils corresponds to the number of poles, the material used for the coils makes a decisive contribution to the overall mass of the rotor, particularly in the case of a multi-pole rotor arrangement. A high material rate for the winding of the coils thus leads to a heavy and thus lossy runner. Furthermore, a high cost of materials for winding the coil also leads to high production costs for the electrical machine.
  • the invention is therefore based on the object of specifying an electronic machine having a rotor with a pronounced pole, in which the material used for the rotor coils is particularly low.
  • the effective cooling surface of each coil should be particularly large.
  • each coil is wound between two poles as a yoke coil around the yoke of the rotor.
  • the invention is based on the consideration that a conductor loop or coil generating a magnetic field vortex can be arranged at any point along the magnetic field vortex.
  • a coil with a large coil cross section and a length that is short in comparison is unfavorably h ⁇ ns ⁇ chtl ⁇ c n the amount of material required for winding the coil and with regard to the effective cooling surface on the outside of the coil. Rather, it would be preferable to use a thin and long coil which can be produced with the same number of turns with a comparatively small amount of material and which has a large effective cooling surface.
  • the area of the yoke between two poles is a large yoke compared to the pole height 3 and also has a comparatively small cross-sectional area compared to the pole shaft, a coil that is thin and long compared to a pole coil is produced when a coil is wound around this yoke region.
  • a coil preferably extends over the entire insulated yoke width. This is the distance between the two poles left along the yoke minus the distance taken up by coil insulation. This creates a particularly long coil. The number of superimposed winding layers is thus kept particularly low. This enables effective cooling of the coil. In addition, the average turn length is kept particularly small in this way. Particularly good cooling properties result when the coil length exceeds the winding width.
  • the pole shaft of each pole is advantageously provided with a convex end face. In this way, a particularly favorable induction distribution is achieved between the air gap formed between a pole and the inner surface of the stand. This in turn favors the coupling of the magnetic field vortex from the pole into the area of the stand above it.
  • Poldacher are provided on the pole shaft for this purpose, which protrude beyond the end face of the pole shaft and thereby simultaneously hold the pole coil on the pole shaft.
  • Such a pole roof can now be dispensed with in a cost-saving manner.
  • the shape of the pole roof adapted to the stand can rather be applied directly to the pole shaft.
  • the pole shaft preferably has a constant cross-sectional area. This is particularly easy to manufacture in terms of production technology and facilitates the insertion of the coil onto the yoke.
  • the rotor magnetic circuit carrying the poles is preferably listed as a closed ring. This ensures a high 4
  • the rotor magnetic circuit can also be composed of individual circle segments. Two adjacent segments each meet in one pole. In large systems in particular, a rotor magnetic circuit composed of segments is comparatively easy to implement.
  • the coils are expediently designed as directly wound coils.
  • the number of poles provided on a rotor is e.g. between 30 and 60.
  • FIG. 1 shows a perspective view of a partial view of a rotor of an electrical machine wound with yoke coils
  • FIG. 2 shows a schematically simplified cross section through a rotor according to FIG. 1
  • FIG. 3 shows the diagram according to FIG. 2 with a representation of the coil geometry
  • FIG. 4 shows a partial view of a multi-pole rotor n a plan view along the rotor axis.
  • FIG. 1 shows a partial view of the magnetic circuit 1 of a rotor 2 with pronounced poles 3.
  • the poles 3 are arranged distributed over the circumference of a hollow cylindrical yoke 4 which coaxially surrounds a rotor axis 5.
  • Each pole 3 is with its approximately cuboidal pole shaft 6 on the man- 5 telflache 7 of the yoke 4 placed.
  • the circumferentially extending width A of the pole shaft 6 and the length C of the pole shaft 6 extending parallel to the rotor axis 5 are large compared to the radial pole shaft height D.
  • the length C of the pole shaft 6 is identical to the length C of the yoke 4, so that the yoke 4 forms a common end face 8 with each pole 3.
  • the distance of the yoke 4 left free in the circumferential direction between two adjacent poles 3 corresponds to the yoke width E.
  • This yoke width E is again large compared to the radial yoke height B.
  • the cross-sectional area of the pole shaft 6 is the area spanned by the width A and the length C, while the cross-sectional area of the yoke 4 is determined by the length C and the yoke height B.
  • Each area of the yoke 4 with the yoke width E lying between two poles 3 is wound with a coil 9.
  • FIG. 1 The magnetic interaction of a runner 2 with a stator 10 coaxially surrounding the runner 2 is illustrated schematically in FIG.
  • the circular geometry of both the runner 2 and the stand 10 is neglected.
  • the coils 9 are shown schematically as conductor loops and are marked in accordance with the direction of the current flowing through the coils 9.
  • the coils 9 (yoke coils) wound around the yoke 4 have an alternating sense of turn. Magnetic field vortices H are generated in this way.
  • the field lines of each magnetic field wire H pass in a pole 3 from the rotor 2 into the stander 10 and from there via an adjacent pole 3 into the rotor 2.
  • the end face 12 of each pole 3 is provided with a convex curvature. 6
  • the coils 9, which are electrically shielded from the rotor 2 by insulation 13, have a comparatively elongated coil geometry.
  • the ratio of the coil length L to the coil cross section M is particularly large.
  • the coil cross section M here means the cross section of the passage of the coil 9.
  • the winding cross-section N has approximately the shape of a rectangle spanned by the coil length L and the winding width 0, the coil length L exceeding the winding width 0.
  • the advantage of the coil 9 over a pole coil wound around the pole shaft 6 in accordance with Bodefeld / sequence is in particular that the yoke height B is approximately half the width of the pole shaft A. The one needed for a turn
  • the length of the wire in the coil 9 is thus smaller by the amount of the pole shaft width A than in the case of a pole coil. Since the coil length L of the coil 9 is determined by the yoke width E which is comparatively large compared to the yoke shaft height B, the coil 9 has a comparatively large effective cooling surface 14 which is in contact with a cooling air flow 15.
  • the magnetic circuit 1 is attached to a rotor shaft 17 rotating about the rotor axis 5 by means of two mutually parallel support stars 16.
  • the two supporting stars 16 are arranged offset to one another in the circumferential direction.
  • the mechanical coupling of the magnetic circuit 1 to the support stars 16 always takes place in the region of a pole 3.
  • Each support star 16 is in turn attached to the rotor shaft 17 by means of a flange 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

L'invention concerne un moteur électrique présentant un rotor (2) excité par des bobines avec des pôles saillants (3). L'invention vise à accroître, dans ce moteur électrique, la surface de refroidissement active (14) des bobines (9) et à minimiser les besoins en matériau pour l'enroulement des bobines (9). A cet effet, le circuit magnétique (1) du rotor (2) présente, à chaque fois entre deux pôles, une bobine (9) enroulée autour de la culasse (4).
PCT/DE1999/001339 1998-05-07 1999-05-05 Moteur electrique avec rotor excite par des bobines WO1999059232A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998120475 DE19820475A1 (de) 1998-05-07 1998-05-07 Elektrische Maschine mit einem spulenerregten Läufer
DE19820475.2 1998-05-07

Publications (1)

Publication Number Publication Date
WO1999059232A1 true WO1999059232A1 (fr) 1999-11-18

Family

ID=7867001

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/001339 WO1999059232A1 (fr) 1998-05-07 1999-05-05 Moteur electrique avec rotor excite par des bobines

Country Status (2)

Country Link
DE (1) DE19820475A1 (fr)
WO (1) WO1999059232A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE23000C (de) * E. LUMLEY in New-York, V. St. A Neuerungen an den Armaturen von magnet-elektrischen Maschinen
FR2535924A1 (fr) * 1982-11-05 1984-05-11 Thomson Csf Procede de bobinage de machines electriques tournantes et machines ainsi bobinees
DE4404585A1 (de) * 1994-02-12 1995-08-17 Sen Rainer Born Stator mit Ringkernspulen für elektrische Maschinen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE708948C (de) * 1939-05-12 1941-08-01 Mix & Genest Akt Ges Statorwicklung
DE3411895A1 (de) * 1984-03-30 1985-10-10 Thyssen Industrie Ag, 4300 Essen Magnetausbildung fuer einen langstatorantrieb
DE4415224A1 (de) * 1994-04-27 1995-11-02 Siemens Ag Elektrische Maschine mit einem Polrad

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE23000C (de) * E. LUMLEY in New-York, V. St. A Neuerungen an den Armaturen von magnet-elektrischen Maschinen
FR2535924A1 (fr) * 1982-11-05 1984-05-11 Thomson Csf Procede de bobinage de machines electriques tournantes et machines ainsi bobinees
DE4404585A1 (de) * 1994-02-12 1995-08-17 Sen Rainer Born Stator mit Ringkernspulen für elektrische Maschinen

Also Published As

Publication number Publication date
DE19820475A1 (de) 1999-11-18

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