Stator for a rotating electric machine and a method of manufacturing a stator

A stator according to any one of the preceding claims, characterized in that said winding is provided by means of an insulated conductor (50) which comprises at least one current-carrying conductor (51), a first layer (52) having semiconducting properties provided around said conductor, a solid insulating layer (53) provided around said first layer, and a second layer (54) having semiconducting properties provided around said insulating layer.

A stator according to any one of the preceding claims, characterized in that the stator winding (6) is arranged to be inserted between each stator tooth plank (2) before they are fitted together to form a section of a stator core or to form a complete stator core.

A stator according to any one of the preceding claims, characterized in that the stator tooth (3) comprises a forward tooth portion (4) facing inwards, towards the rotor, when mounted in the stator, and a yoke portion (5) facing outwards, that said stator tooth has two opposite lateral sides each facing the corresponding side of an adjacent stator tooth, that the lateral sides of the tooth portion (4) facing inwards are provided with slots (8) for the winding and that at least one of the lateral sides of the yoke portion (5) is provided with a lining (13) made of a resilient material.

A stator according to any one of the preceding claims, characterized in that the stator tooth comprises a forward tooth portion (4) facing inwards, towards the rotor, when mounted in the stator and a yoke portion (5) facing outwards, that said stator tooth has two opposite lateral sides each facing the corresponding side of an adjacent stator tooth, that the lateral sides of the tooth portion facing inwards is provided with slots (8) for the winding, and in that it further comprises a separate lining element (13) of a resilient material which is inserted between the lateral sides of the yoke portions (5) of two adjacent stator teeth.

A stator according to any one of the preceding claims, characterized in that at least one longitudinal axial notch (22) is arranged in the tooth (3;

• 35), along its innermost side and facing the rotor, that a key element (23;
• 44) of a non magnetic material is positioned in said notch in order to prevent lateral oscillations of said tooth and/or the adjacent tooth.

A stator according to any one of the preceding claims, characterized in that it comprises compressing means (12;

• 40, 41;
• 48) for tangentially compressing the teeth (3;
• 35) of the stator, thereby providing a prestressing at the innermost end of the teeth.

A stator according to any one of the preceding claims, characterized in that the stator core sections (1A, 1B, 1C, 1D) of the complete stator core are held in place by means of an annular stator frame (12), surrounding said core.

A stator according to any of the preceding claims, characterized in that each tooth section (7) and thus each stator tooth plank (2) is provided on both lateral sides with guiding means (9, 10) designed to fit against corresponding guiding means of corresponding shape on adjacent stator tooth planks (2).

A method according to any one of the preceding claims, characterized in providing a lining (13) of resilient material to the yoke portion (5) of at least one of two opposite lateral sides of a stator tooth (3) facing the corresponding side of an adjacent stator tooth, preferably before the fitting.

A method according to any one of the preceding claims, characterized in inserting a lining element (13) of resilient material between the lateral sides of the yoke portions (5) of two adjacent stator teeth (3), before or after the fitting.

A method according to any one of the preceding claims, characterized in inserting key elements (23;

• 44) of a non magnetic material between the tooth planks (2), at the forward end of the teeth (3;
• 35) facing the rotor, in notches (22) provided for this purpose in the stator tooth planks.

A method according to any one of the preceding claims, characterized in applying compression means (12;

• 40, 41;
• 48) for tangentially compressing the teeth (3;
• 35) of the stator, thereby providing a prestressing at the innermost end of the teeth.

A method according to any one of the preceding claims, characterized in providing a lining of a resilient material (15) to the external side of the yoke portion (5) of the stator tooth.

A method according to any one of the preceding claims, characterized in providing a lining of a resilient material (15) to the inwardly facing surface of a stator frame (12), which enters into contact with the external sides of the yoke portions (5) of the stator teeth (3).

A method according to any one of the preceding claims, characterized in assembling the stator core sections (1A, 1B, 1C, 1D) into a complete stator core within a stator frame.

A method according to any one of the preceding claims, characterized in inserting the winding (6;

• 14;
• 38) in the axial direction of the stator core.

A method according to any one of the preceding claims, characterized in manufacturing the stator on the site of installation of the rotating electric machine.