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Disponibilité de l'Abrégé et des Revendications

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(12) Brevet: (11) CA 2774303
(54) Titre français: FORMAGE D'AIMANTS DANS UNE MACHINE SYNCHRONE A AIMANTS PERMANENTS
(54) Titre anglais: MAGNET SHAPING IN PERMANENT MAGNET SYNCHRONOUS MACHINES
(51) Classification internationale des brevets (CIB):
  • H01F 7/02 (2006.01)
  • F03G 3/08 (2006.01)
  • H02K 1/17 (2006.01)
  • H02K 1/27 (2006.01)
  • H02K 21/02 (2006.01)
(72) Inventeurs (Pays):
  • WILKINS, MATTHEW M. (Canada)
  • MCARTHUR, JOHNATHON G. R. (Canada)
(73) Titulaires (Pays):
  • FLYWHEEL ENERGY SYSTEMS INC. (Canada)
(71) Demandeurs (Pays):
  • FLYWHEEL ENERGY SYSTEMS INC. (Canada)
(74) Agent: GOWLING WLG (CANADA) LLP
(45) Délivré: 2013-06-25
(22) Date de dépôt: 2012-04-19
(41) Mise à la disponibilité du public: 2012-06-26
Requête d’examen: 2012-04-19
(30) Licence disponible: S.O.
(30) Langue des documents déposés: Anglais

Abrégé français

Machine de synchronisation magnétique permanente dotée dun stator, dun rotor et de plusieurs aimants fixés au rotor. Chaque aimant est doté dune structure caractérisée par une surface externe radiale, une surface interne plate, une surface de premier côté située face à un pôle opposé, et une surface de deuxième côté située face à un pôle similaire, la surface de premier côté et la surface interne plate forment un angle delta 1 supérieur à 90 degrés, et la surface de deuxième côté ainsi que la surface interne plate forment un angle delta 2 qui est également supérieur à 90 degrés. La machine de synchronisation magnétique permanente peut être utilisée au sein du système de stockage dénergie dun volant dinertie ou dautres systèmes électromécaniques.


Abrégé anglais

A permanent magnet synchronous machine comprises a stator, a rotor and a plurality of permanent magnets mounted to the rotor. Each magnet has a shaped body characterized by an arcuate radially outer surface, a flat inner surface, a first side surface facing an opposite pole, and a second side surface facing a like pole, wherein the first side surface and the flat inner surface subtend an angle .delta.1 that is greater than 90 degrees and wherein the second side surface and the flat inner surface subtend an angle .delta.2 that is also greater than 90 degrees. The permanent magnet synchronous machine may be used in a flywheel energy storage system or in other electromechanical systems.


Note : Les revendications sont présentées dans la langue officielle dans laquelle elles ont été soumises.


CLAIMS:

1. A permanent magnet for use in a permanent magnet synchronous machine,
the
permanent magnet comprising:
a shaped body, the shaped body having:
an arcuate radially outer surface;
a flat inner surface;
a first side surface facing an opposite pole;
a second side surface facing a like pole;
wherein the first side surface and the flat inner surface subtend an angle
.delta.1 that
is greater than 90 degrees and wherein the second side surface and the
flat inner surface subtend an angle .delta.2 that is also greater than 90
degrees.
2. The permanent magnet as claimed in claim 1 wherein the angle .delta.1 is
greater
than the angle .delta.2.
3. The permanent magnet as claimed in claim 1 wherein .theta. ranges from
25 to 35
degrees, wherein .theta. is an angle that subtends a quadrature axis and a
centerline
orthogonal to the flat inner surface.
4. The permanent magnet as claimed in claim 1 wherein the first side
surface has
a lesser surface area than the second side surface.
5. The permanent magnet as claimed in claim 1 wherein a centerline
orthogonal to
the flat inner surface and extending through an origin of a radius of the
arcuate
radially outer surface divides the flat inner surface into a first section
facing the
opposite pole and a second section facing the like pole, wherein the first
section
is longer than the second section.
6. The permanent magnet as claimed in claim 4 wherein a centerline
orthogonal to
the flat inner surface and extending through an origin of a radius of the
arcuate
radially outer surface divides the flat inner surface into a first section
facing the

-11-

opposite pole and a second section facing the like pole, wherein the first
section
is longer than the second section.
7. The permanent magnet as claimed in claim 1 wherein the arcuate outer
surface
has a constant radius of curvature.
8. The permanent magnet as claimed in claim 1 wherein the shaped body is
axially skewed.
9. The permanent magnet as claimed in claim 1 wherein a ratio of
asymmetrical
length to total length (b1-b2)/(b1+b2) ranges between 0% and 75%.
10. The permanent magnet as claimed in claim 1 wherein .delta.1, .delta.2
and .theta. are defined
as follows:
Image
wherein n is a number of magnetic poles and wherein
Image
11. The permanent magnet as claimed in claim 10 wherein x = 2/3.
12. A permanent magnet synchronous machine comprising:
a stator;
a rotor; and
a plurality of permanent magnets mounted to the rotor, each magnet having a
shaped body characterized by:
-12-

an arcuate radially outer surface;
a flat inner surface;
a first side surface facing an opposite pole;
a second side surface facing a like pole;
wherein the first side surface and the flat inner surface subtend an angle
.delta.1 that is greater than 90 degrees and wherein the second side
surface and the flat inner surface subtend an angle .delta.2 that is also
greater than 90 degrees.
13. The machine as claimed in claim 12 wherein the angle .delta.1 is
greater than the
angle .delta.2.
14. The machine as claimed in claim 12 wherein 8 ranges from 25 to 35
degrees,
wherein .theta. is an angle that subtends a quadrature axis and a centerline
orthogonal to the flat inner surface.
15. The machine as claimed in claim 12 wherein the first side surface has a
lesser
surface area than the second side surface.
16. The machine as claimed in claim 12 wherein a centerline orthogonal to
the flat
inner surface and extending through an origin of a radius of the arcuate
radially
outer surface divides the flat inner surface into a first section facing the
opposite
pole and a second section facing the like pole, wherein the first section is
longer
than the second section.
17. The machine as claimed in claim 12 wherein the arcuate radially outer
surface
has a constant radius of curvature.
18. The machine as claimed in claim 12 wherein the permanent magnets are
surface-mounted in pairs to the rotor such that each magnet abuts adjacent
magnet of like pole and such that there is a gap between adjacent magnets of
opposite pole.
-13-


19. A flywheel energy storage system comprising:
a flywheel; and
a permanent magnet synchronous machine having:
a stator;
a rotor; and
a plurality of permanent magnets mounted to the rotor, wherein each
permanent magnet includes a shaped body characterized by:
an arcuate radially outer surface;
a flat inner surface;
a first side surface facing an opposite pole;
a second side surface facing a like pole;
wherein the first side surface and the flat inner surface subtend an angle
.delta.1 that is greater than 90 degrees and wherein the second side
surface and the flat inner surface subtend an angle .delta.2 that is also
greater than 90 degrees.
20. The system as claimed in claim 19 wherein the angle .delta.1 is greater
than the
angle .delta.2.
21. The system as claimed in claim 19 wherein .theta. ranges from 25 to 35
degrees,
wherein .theta. is an angle that subtends a quadrature axis and a centerline
orthogonal to the flat inner surface.
22. The system as claimed in claim 19 wherein the first side surface has a
lesser
surface area than the second side surface.
23. The system as claimed in claim 19 wherein a centerline orthogonal to
the flat
inner surface and extending through an origin of a radius of the arcuate
radially
outer surface divides the flat inner surface into a first section facing the
opposite

-14-


pole and a second section facing the like pole, wherein the first section is
longer
than the second section.
24. The system as claimed in claim 19 wherein the arcuate radially outer
surface
has a constant radius of curvature.
25. The system as claimed in claim 19 wherein the permanent magnets are
surface-mounted in pairs to the rotor such that each magnet abuts adjacent
magnet of like pole and such that there is a gap between adjacent magnets of
opposite pole.
26. A permanent magnet for use in a permanent magnet synchronous machine,
the
permanent magnet comprising:
a shaped body, the shaped body having:
an arcuate radially outer surface; and
an inner surface composed of two flat angled sections that are symmetrical
about a plane of symmetry defined by a d-axis.
27. The magnet as claimed in claim 26 wherein one of the flat angled
sections and
a respective side surface facing an adjacent magnet subtend an angle .delta.1
that is
greater than 90 degrees.
28. The magnet as claimed in claim 27 wherein a thickness t1 of the shaped
body
along the side surface is less than a thickness t2 along a plane of symmetry
of
the magnet.

-15-


Une figure unique qui représente un dessin illustrant l’invention.

Pour une meilleure compréhension de l’état de la demande ou brevet qui figure sur cette page, la rubrique Mise en garde , et les descriptions de Brevet , États administratifs , Taxes périodiques et Historique des paiements devraient être consultées.

États admin

Titre Date
(22) Dépôt 2012-04-19
Requête d'examen 2012-04-19
(41) Mise à la disponibilité du public 2012-06-26
(45) Délivré 2013-06-25
Périmé 2016-04-19

Historique des paiements

Type de taxes Anniversaire Échéance Montant payé Date payée
Requête d'examen 400,00 $ 2012-04-19
Enregistrement de documents 100,00 $ 2012-04-19
Dépôt 200,00 $ 2012-04-19
Final 150,00 $ 2013-04-09
Taxe périodique - brevet - nouvelle loi 2 2014-04-22 50,00 $ 2014-02-17

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Filtre Télécharger sélection en format PDF (archive Zip)
Description du
Document
Date
(yyyy-mm-dd)
Nombre de pages Taille de l’image (Ko)
Abrégé 2012-04-19 1 17
Description 2012-04-19 10 435
Revendications 2012-04-19 5 146
Dessins 2012-04-19 4 131
Page couverture 2012-06-29 1 37
Dessins représentatifs 2012-06-29 1 7
Revendications 2012-10-11 5 154
Description 2012-10-11 10 434
Page couverture 2013-06-06 2 41
Correspondance 2012-10-29 1 31
Poursuite-Amendment 2012-07-05 1 19
Poursuite-Amendment 2012-07-18 3 119
Poursuite-Amendment 2012-10-11 10 340
Correspondance 2013-04-09 2 48
Taxes 2014-02-17 1 32