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US 2014/0175933 A1Published application
Stator of an axial flow electric machine and the process for making it
AssigneeLucchi R. Elettromeccanica S.R.L.
InventorFABIO LUCCHI
Life of this patent
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Abstract
Described is a stator for an axial flow electric machine comprising a toroidal core (2) made from ferromagnetic material and a plurality of windings (3) and teeth (4) angularly distributed on the core (2) in an alternating configuration. The teeth have, on at least one relative lateral surface, a shaped profile defining at least one gripping surface (12) such as to act in conjunction with a matrix of resin designed to stably press the teeth (4) on the core (2).
Claims20
A stator of an axial flow electric machine, comprising:
- a toroidal core (2) extending around an axis (X) and comprising at least one annular receiving surface (5);
- a plurality of teeth (4), positioned in contact on the receiving surface (5) and extending away from the receiving surface (5) along said axis (X), each of the teeth (4) comprising a first tangential surface (4c) facing towards the axis (X) and a second tangential surface (4d) which is opposite to the first tangential surface (4c);
- a plurality of windings (3), angularly distributed around the axis (X) and operating in conjunction with the core (2) and the teeth (4) for linking a magnetic flow passing through the core (2) and the teeth (4),
- wherein at least one of the teeth (4) comprises, on at least one of the tangential surfaces (4c, 4d), a shaped profile forming at least one gripping surface (12) facing in the opposite direction to the toroidal core (2), and wherein the stator (1) comprises a resin matrix binding together at least the toroidal core (2) and the teeth (4).
1 more element
A method for making a stator for an axial flow electric machine, comprising the following steps:
- preparing a core (2) made of ferromagnetic material and extending along a circular line, comprising at least one receiving surface (5) lying on said circular line;
- preparing a plurality of teeth (4) made of ferromagnetic material, each tooth (4) comprising a base wall (4a) which can engage with the receiving surface (5), a top wall (4b) opposite to the base wall (4a) and at least two tangential walls (4c, 4d) which are opposite to one another and are located between the base wall (4a) and the top wall (4b), and wherein each one of the teeth (4) comprises, on at least one of the tangential surfaces (4c, 4d), a shaped profile forming at least one gripping surface (12) facing in the opposite direction to the base wall (4a);
- preparing a plurality of windings (3);
- applying teeth (4) on the core (2) in such a way that the base wall (4a) of each tooth (4) is resting on the receiving surface (5);
- applying windings (3) on the core (2) in such a way that the windings (3) operate in conjunction with the core (2) and with the teeth (4) for linking with a magnetic flow passing through the core (2) and the teeth (4);
- after applying the teeth (4) on the core (2), impregnating the core (2) and the teeth (4) with a resin matrix in such a way that the resin sticks on the gripping surface (12), holding the tooth (4) on the core (2).
3 more elements
Dependencies are inferred from the claim text.