DE102020109388A1 - Stator tooth for an axial flux machine and method of production - Google Patents

Abstract

The invention relates to a stator tooth (2) for a stator (1) of an axial flux machine, the stator tooth (2) comprising a soft magnetic composite material and electrical sheet material, the stator tooth (2) comprising a core (3) made of grain-oriented electrical sheet material, the core ( 3) is surrounded by a shell area (4) which consists of a sintered soft magnetic composite material.

Description

The invention relates to a stator tooth for a stator of an axial flux machine according to claim 1 and a method for its production according to claim 5.

Metal powder materials, in particular soft magnetic composite materials (SMC - soft magnetic composite), are often used in the stator of an axial flux machine in the double rotor concept. These offer the advantage of low processing costs and a reduction in weight. However, due to the properties of the material and the lack of alignment of the material grains, targeted flow guidance is not possible.

the DE 10 2016 203 739 A1 discloses a package system for an electrical machine, in particular a motor or transformer, the package system having at least one magnetic fiber material, the fibers of which are provided with an electrically insulating coating.

The invention is based on the object of specifying an improved stator tooth for a stator of an axial flux machine and a method for its production.

The object is achieved according to the invention by a stator tooth according to claim 1 and by a method according to claim 5.

Advantageous refinements of the invention are the subject matter of the subclaims.

A stator tooth according to the invention for a stator of an axial flux machine comprises a soft magnetic composite material and electrical sheet material. According to the invention, the stator tooth comprises a core made of grain-oriented electrical sheet material, the core being surrounded by an envelope area made of a sintered soft magnetic composite material.

The invention combines the advantages of soft magnetic composite materials (SMC) and electrical steel, in which the stator tooth of the axial flux machine consists of electrical steel and the outer part of SMC. The core can be manufactured using the conventional methods for electrical steel and the outer part of the stator tooth can be manufactured by sintering. The two parts can be connected, for example, by gluing.

The advantages of the soft magnetic composite material (SMC) are retained, while the disadvantage of the non-existent flux guidance / flux reinforcement through the core of the stator tooth made of electrical steel is solved.

Embodiments of the invention are explained in more detail below with reference to drawings.

• 1 eine schematische Ansicht eines Stators einer Axialflussmaschine,
• 2 eine schematische Ansicht eines Statorzahns der Axialflussmaschine, und
• 3 eine schematische Schnittansicht des Statorzahns.

Show:

• 1 a schematic view of a stator of an axial flux machine,
• 2 a schematic view of a stator tooth of the axial flow machine, and
• 3 a schematic sectional view of the stator tooth.

Corresponding parts are provided with the same reference symbols in all figures.

1 Fig. 3 is a schematic view of a stator 1 an axial flux machine, the stator 1 a number of stator teeth 2 includes.

2 Fig. 3 is a schematic view of a stator tooth 2 the axial flow machine.

3 Fig. 3 is a schematic sectional view of the stator tooth 2 . The stator tooth 2 has a core 3 which consists of electrical steel, that is, of a grain-oriented electrical steel. The core 3 is surrounded by an envelope area 4th made of a soft magnetic composite (SMC).

The core 3 can be manufactured using a process commonly used for electrical steel. The envelope area 4th can be made by sintering. The connection of the core 3 with the envelope area 4th can be done by gluing.

By using a core 3 made of electrical steel in the stator tooth 2 a flow enhancement is achieved.

List of reference symbols

1

stator

2

Stator tooth

3

core

4th

Envelope area

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102016203739 A1 [0003]

Claims (6)

Stator tooth (2) for a stator (1) of an axial flux machine, the stator tooth (2) comprising a soft magnetic composite material and electrical sheet material, characterized in that the stator tooth (2) comprises a core (3) made of grain-oriented electrical sheet material, the core (3 ) is surrounded by a shell area (4) which consists of a sintered soft magnetic composite material. Stator tooth (2) Claim 1 , characterized in that the core (3) and the envelope area (4) are glued to one another. Stator (1) for an axial flux machine, comprising a plurality of stator teeth (2) according to Claim 1 or 2 . Axial flux machine, comprising a stator (1) according to Claim 3 . Method for manufacturing a stator tooth (2) for a stator (1) of an axial flux machine, the stator tooth (2) being manufactured from a soft magnetic composite material and from electrical sheet material, characterized in that a core (3) of the stator tooth (2) is made from grain-oriented electrical sheet material is manufactured, a shell region (4) surrounding the core (3) being produced by sintering from a soft magnetic composite material. Procedure according to Claim 5 , characterized in that the core (3) and the envelope area (4) are glued to one another.

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