Methods of assembling an electrical machine

Patent metadata

Field	Value
Publication number	US-2016190901-A1
Application number	US-201514971741-A
Country	US
Kind code	A1
Filing date	Dec 16, 2015
Priority date	Dec 24, 2014
Publication date	Jun 30, 2016
Grant date	—

Abstract

A method of constructing an electrical machine by assembling a first structure (one of a rotor and stator structure) and a second structure (the other of the rotor and stator structure), along with a plurality of first elements (one of a plurality of permanent magnet elements and a plurality of winding elements) and a plurality of second elements (the other plurality of the permanent magnet elements and winding elements). The first elements are attached to a rim of the first structure, and the second elements are attached to the first elements, this attachment being caused by a magnetic attraction. The first structure is assembled with the second structure such that the second elements are positioned for a posterior attachment to a rim of the second structure, and the second elements are attached to the rim of the second structure.

First claim

1 . A method of constructing an electrical machine by assembling a first structure and a second structure along with a plurality of first elements and a plurality of second elements, wherein
the first structure is one of a rotor structure and a stator structure; the second structure is the other of the rotor structure and the stator structure; the plurality of first elements is one of a plurality of permanent magnet elements and a plurality of winding elements; and the plurality of second elements is the other of the plurality of permanent magnet elements and the plurality of winding elements; and wherein the method comprises: attaching the first elements to a rim of the first structure; attaching the second elements to the first elements, the attachment being caused by a magnetic attraction between the first and second elements; assembling the first structure with the second structure such that the second elements are positioned for a posterior attachment to a rim of the second structure; and attaching the second elements to the rim of the second structure, such that the second elements are moved away from the first elements.

2 . A method according to claim 1 , wherein attaching the second elements to the first elements comprises
attaching the second elements to the first elements with one or more first non-magnetic separators sandwiched between the first elements and the second elements.

3 . A method according to claim 2 , further comprising
removing the one or more first non-magnetic separators which have been previously released as a result of the attachment of the second elements to the rim of the second structure.

4 . A method according to claim 2 , wherein a shape of a rotor side surface of the first non-magnetic separators is adapted to mate with a shape of a perimeter of the rotor.

5 . A method according to claim 2 , wherein a shape of a stator side surface of the first non-magnetic separators is adapted to mate with a shape of a perimeter of the stator.

6 . A method according to claim 2 , wherein the one or more first non-magnetic separators have a thickness between approximately 2 mm and approximately 4 mm smaller than a nominal air-gap value.

7 . A method according to claim 2 , wherein attaching the second elements to the first elements comprises
attaching at least one pair of the second elements to corresponding first elements with a second non-magnetic separator sandwiched between the pair of second elements.

8 . A method according to claim 7 , wherein the second non-magnetic separator has a thickness in a range of approximately 0.3 mm to approximately 0.7 mm.

9 . A method according to claim 7 , wherein the second non-magnetic separator and a corresponding one of the first non-magnetic separators are formed as a single piece.

10 . A method according to claim 1 , wherein the attachment of one or more of the second elements to corresponding one or more first elements is performed before the attachment of the one or more first elements to the rim of the first structure.

11 . A method according to claim 1 , wherein attaching the second elements to the rim of the second structure comprises screwing the second elements to the second structure.

12 . A method according to claim 1 , wherein the first elements or the second elements are permanent magnet elements, and at least one of the permanent magnet elements is a single permanent magnet attached directly to the rim of the corresponding first or second structure.

13 . A method according to claim 1 , wherein the first elements or the second elements are permanent magnet elements, and at least one of the permanent magnet elements is a permanent magnet module that comprises a module base and a plurality of permanent magnets coupled to the module base, such that the permanent magnets are attached together to the rim of the corresponding first or second structure through the module base.

14 . A method according to claim 1 , wherein the first elements or the second elements are winding elements, and at least one of the winding elements is a single tooth and coil attached directly to the rim of the corresponding first or second structure.

15 . A method according to claim 1 , wherein the first elements or the second elements are winding elements, and at least one of the winding elements is a coil module that comprises one or more teeth and a plurality of coils coupled to the teeth, such that the coils are attached together to the rim of the corresponding first or second structure through the teeth.

16 . A method according to claim 1 , wherein at least one of the winding elements includes bars forming part of a distributed winding.

17 . A method according to claim 3 , wherein attaching the second elements to the first elements comprises
attaching at least one pair of the second elements to corresponding first elements with a second non-magnetic separator sandwiched between the pair of second elements.

18 . A method according to claim 4 , wherein attaching the second elements to the first elements comprises
attaching at least one pair of the second elements to corresponding first elements with a second non-magnetic separator sandwiched between the pair of second elements.

19 . A method according to claim 5 , wherein attaching the second elements to the first elements comprises
attaching at least one pair of the second elements to corresponding first elements with a second non-magnetic separator sandwiched between the pair of second elements.

20 . A method according to claim 7 , wherein the attachment of one or more of the second elements to corresponding one or more first elements is performed before the attachment of the one or more first elements to the rim of the first structure.

Assignees

• Alstom Renewable Technologies

Inventors

• Keller Stefan

Classifications

• H02K15/028 Primary

  Fastening stator or rotor bodies to casings, supports, shafts or hubs · CPC title

• H02K15/03

  having permanent magnets · CPC title

• H02K2213/12

  Machines characterised by the modularity of some components · CPC title

• Y10T29/49012

  Rotor · CPC title

• Y10T29/49069

  Data storage inductor or core · CPC title