CN212969228U

CN212969228U - Motor stator core and axial flux motor

Info

Publication number: CN212969228U
Application number: CN202021268443.6U
Authority: CN
Inventors: 陈拯民
Original assignee: Tongling Hardcore Technology Co ltd
Current assignee: Huzhou Hardcore Pai Technology Co ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2021-04-13
Anticipated expiration: 2030-07-02

Abstract

The utility model relates to a motor stator core and axial flux motor, wherein, motor stator core, including the iron core main part with set up in the insulating chamfer part in the iron core main part outside, the iron core main part has a pair of step-like lateral wall, step-like lateral wall has the step that forms along motor stator core's outer ring side to inner ring side direction; the insulating chamfering component has a certain thickness and is at least arranged near the side corner of the end face of the inner ring side and the outer ring side of the iron core main body, so that the winding wound on the stator iron core of the motor can be spaced from the iron core main body. The embodiment of the utility model provides a motor stator core and axial flux motor adopts the modularized design, and processing, manufacturing, assembly are simple, have the insulating chamfer part of certain thickness through the setting, have increased part strength, have guaranteed the insulating effect between winding and the iron core for the edges and corners and the burr of iron core can not damage the winding.

Description

Motor stator core and axial flux motor

Technical Field

The utility model belongs to the technical field of the motor, concretely relates to motor stator core and axial flux motor.

Background

The stator of the motor is an important component of the motor such as a generator, a starter and the like, and consists of a stator core, a stator winding and a machine base. The stator core and the rotor core, and the air gaps between the stator and the rotor form a complete magnetic circuit of the motor, and the structure and the arrangement of the stator core are related to the overall performance of the motor.

The prior art iron core generally performs insulation treatment on the surface, but when the machining precision of the iron core is poor and more burrs or edges and corners exist, the iron core directly contacts with the winding, so that the insulation layer is abraded or the winding is damaged.

In the prior art, a stator core of an axial flux motor is mostly formed by winding a silicon steel strip with stator slots, and a stator tooth part and a stator yoke part of the axial flux motor are of an integral structure. Because the magnetic force lines of the tooth part and the yoke part are different in trend, the magnetic force lines of the tooth part are parallel to the axial direction, the magnetic force lines of the yoke part are perpendicular to the axial direction, the stator iron core is made of non-oriented silicon steel coils, and compared with the oriented silicon steel coils, the loss of the iron core is high in the tooth part of the stator, the magnetic density saturation point is low, and the overall efficiency and the maximum output torque of the motor are influenced.

Although the situation that a plurality of silicon steel sheets are stacked along the thickness direction of the iron core to manufacture the iron core exists in the prior art, the iron core is required to have a section shape which is trapezoidal and has smooth side edges as far as possible, so that the sizes of the stacked silicon steel sheets are gradually changed and different, different punching and grinding tools are required to be used for respectively punching and forming, the machining process is complex, the assembly difficulty is high, and the manufacturing cost is high. The side wall of the manufactured iron core is provided with a convex edge, and when the iron core is contacted with the winding, the insulating layer is easy to abrade or damage the winding.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that above-mentioned motor core processing is complicated, the equipment degree of difficulty is high and there is insulating defect, the utility model provides a motor stator core and axial flux motor.

According to one aspect of the utility model, the motor stator iron core comprises an iron core main body and an insulating chamfer component arranged outside the iron core main body,

the iron core main body is provided with a pair of step-shaped side walls, and the step-shaped side walls are provided with steps formed along the direction from the outer ring side to the inner ring side of the motor stator iron core;

the insulating chamfering component has a certain thickness and is at least arranged near the side corner of the end face of the inner ring side and the outer ring side of the iron core main body, so that the winding wound on the stator iron core of the motor can be spaced from the iron core main body.

In an embodiment of the present invention, the insulating chamfering unit is a chamfering bar, the chamfering bar is longitudinally disposed at a side corner position of end faces of an inner ring side and an outer ring side of the core main body, and a part of the chamfering bar extends out of a fixing portion thereof with the core main body.

In an embodiment of the present invention, the chamfer strip is fixed on the inner ring side wall, the outer ring side wall or the step-shaped side wall of the iron core main body.

In an embodiment of the present invention, the insulating chamfering unit is a pair of first chamfering plates, the first chamfering plates are fixedly covered on the step-shaped side wall of the core body, and both ends of the first chamfering plates protrude from the inner ring side wall and the outer ring side wall of the core body, respectively.

In an embodiment of the present invention, the first chamfer plate is matched with a shape of the step-like side wall of the core main body, and the first chamfer plate has an inner wall matched with the shape of the step-like side wall of the core main body.

In an embodiment of the present invention, the insulating chamfering unit is a pair of second chamfering plates, the second chamfering plates are respectively fixedly covered on the inner ring side wall and the outer ring side wall of the core body, and both ends of the second chamfering plates respectively protrude from the step-shaped side wall of the core body.

In one embodiment of the present invention, the insulating chamfer part is an annular member fixed to and covering the outer side of the core main body.

In one embodiment of the present invention, the annular member has an inner wall matching the shape of the outer surface of the core body; the annular member is a split structure, or the annular member is integrally injection-molded on the iron core main body.

In an embodiment of the present invention, a chamfer bar is disposed on the step-shaped side wall of the iron core main body of the motor stator iron core.

In an embodiment of the present invention, a winding guide groove is provided on an outer surface of the insulating chamfer member.

In one embodiment of the present invention, the stator core of the motor further includes pole shoes respectively disposed at both ends of the core body,

the motor stator iron core comprises a plurality of silicon steel bar members, and each silicon steel bar member comprises an iron core main body part and pole shoe parts respectively arranged at two ends of the iron core main body part;

the lengths of the core body portions of the plurality of silicon-steel strip members are the same, the widths of at least two core body portions of the plurality of silicon-steel strip members are different, and the widths of at least two pole shoe portions of the plurality of silicon-steel strip members are different;

the plurality of silicon steel bar members are stacked and fixed in a manner that the center lines of the core main portions are aligned and in the order of the width dimension of the core main portions, and constitute the core main portion having stepped side portions and/or the pole shoe having stepped side portions.

In an embodiment of the present invention, the plurality of silicon steel strip members at least include a first silicon steel strip member and a second silicon steel strip member, and the relationship between the width size formed by the core main body portion of the first silicon steel strip member and the core main body portion of the second silicon steel strip member is not opposite to the relationship between the width size formed by the pole shoe portion of the first silicon steel strip member and the pole shoe portion of the second silicon steel strip member.

In one embodiment of the present invention, the plurality of step beads of the step-like side portion of the core main body are substantially located in one plane, and/or the plurality of step beads of the step-like side portion of the pole shoe are substantially located in one plane.

In one embodiment of the present invention, the ratio of the width of the core body portion of the first silicon steel strip member to the width of the pole shoe portion of the first silicon steel strip member is the same as the ratio of the width of the core body portion of the second silicon steel strip member to the width of the pole shoe portion of the second silicon steel strip member.

In an embodiment of the utility model, one or more silicon steel strip component among a plurality of silicon steel strip components comprises the polylith silicon steel sheet that stacks up, the silicon steel sheet is oriented silicon steel sheet, and the orientation direction of silicon steel sheet is the same with iron core magnetic flow direction.

In an embodiment of the present invention, the silicon steel strip member is a symmetrical i-shape, and the side wall of the silicon steel strip member is a smooth side wall.

According to another aspect of the present invention, an axial flux machine includes a motor stator core as described above.

The utility model has the advantages that: the embodiment of the utility model provides a motor stator core and axial flux motor adopts the modularized design, and processing, manufacturing, assembly are simple, have the insulating chamfer part of certain thickness through the setting, have increased part strength, have guaranteed the insulating effect between winding and the iron core for the edges and corners and the burr of iron core can not damage the winding.

Drawings

Fig. 1 is a schematic view of a stator core of an electrical machine according to a first aspect of the present invention;

fig. 2 is yet another schematic view of a stator core of an electrical machine according to a first aspect of the present invention;

fig. 3 and 4 are respectively an assembly schematic view and a structural schematic view of a stator core of an electric machine according to a first embodiment of the first aspect of the present invention;

fig. 5 and 6 are an assembly schematic view and a structural schematic view, respectively, of a stator core of an electrical machine according to a second embodiment of the first aspect of the present invention;

fig. 7 and 8 are an assembly schematic view and a structural schematic view, respectively, of a stator core of an electric machine according to a third embodiment of the first aspect of the present invention;

fig. 9 and 10 are an assembly schematic diagram and a structural schematic diagram of a stator core of a motor according to a fourth embodiment of the first aspect of the present invention, respectively.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the present invention is not limited to the drawings and the following embodiments.

As used herein, the term "include" and its various variants are to be understood as open-ended terms, which mean "including, but not limited to. The terms "upper", "lower" and the like are used only to indicate a positional relationship between relative objects. The terms "first", "second" and the like are used merely to indicate different technical features and have no essential meaning.

According to the utility model discloses a first aspect, the embodiment of the utility model provides a motor stator core 1 is provided, is particularly useful for axial flux motor, motor stator core 1 includes iron core main part 11 and insulating chamfer part. The core body 11 has a pair of stepped side walls 113, and the stepped side walls 113 have steps formed in a direction from an outer ring side to an inner ring side of the motor stator core 1. The insulating chamfer member has a thickness provided at least in the vicinity of a side corner 135 of end faces of an inner ring side (a side having a smallest width dimension) and an outer ring side (a side having a largest width dimension) of the core main body 11, and enables a winding wound around the motor stator core 1 to be spaced apart from the core main body 11. Wherein, the insulating chamfer part is preferably an injection molding part.

Specifically, as shown in fig. 1 and 2, the stator core 1 of the motor includes a core body 11 and pole shoes 12 respectively disposed at two ends of the core body 11. Of course, the stator core 1 of the electrical machine may not include the pole shoes 12.

The core body 11 has an inner ring side wall 111, an outer ring side wall 112, and a pair of stepped side walls 113. The stepped sidewall 113 has a step formed in a direction from the outer ring sidewall 112 to the inner ring sidewall 111 of the motor stator core 1.

The motor stator core 1 comprises a plurality of silicon steel bar members 13, wherein each silicon steel bar member 13 comprises a core main body part 131 and pole shoe parts 132 respectively arranged at two ends of the core main body part 131; the side walls of the silicon steel strip member 13 are smooth side walls.

The lengths of the core body portions 131 of the plurality of silicon steel bar members 13 are the same, the widths of at least two core body portions 131 of the plurality of silicon steel bar members 13 are different, and the widths of at least two pole shoe portions 132 of the plurality of silicon steel bar members 13 are different. Wherein the lengths of the core body portions 131 of the plurality of silicon steel strip members 13 are the same, the widths of at least two core body portions 131 of the plurality of silicon steel strip members 13 are different, and the widths of at least two pole shoe portions 132 of the plurality of silicon steel strip members 13 are different. Wherein the plurality of silicon steel strip members 13 at least include a first silicon steel strip member and a second silicon steel strip member, and the width size relationship formed based on the core body portion of the first silicon steel strip member and the core body portion of the second silicon steel strip member is not opposite to the width size relationship formed based on the pole shoe portion of the first silicon steel strip member and the pole shoe portion of the second silicon steel strip member, that is, if the width of the core body portion 131 of the first silicon steel strip member 13 is greater than the width of the core body portion 131 of the second silicon steel strip member 13, the width of the pole shoe portion 132 of the first silicon steel strip member 13 is also greater than or equal to the width of the pole shoe portion 132 of the second silicon steel strip member 13 but not less than the width of the pole shoe portion 132 of the second silicon steel strip member 13, and vice versa. Preferably, the ratio of the width of the core body portion of the first silicon steel strip member to the width of the pole shoe portion of the first silicon steel strip member is the same as the ratio of the width of the core body portion of the second silicon steel strip member to the width of the pole shoe portion of the second silicon steel strip member. More preferably, the ratio of the widths of the core body portions 131 and the pole shoe portions 132 of the plurality of silicon steel strip members 13 is the same.

The plurality of silicon steel bar members 13 are stacked and fixed, for example, adhered, in a manner that the center lines of the core main portions 131 are aligned and in order of the width dimension of the core main portions 131, to form the core main portion 11 having stepped side portions and/or the pole shoe 12 having stepped side portions. Preferably, the plurality of stepped ribs 133 of the stepped side portion of the core main body 11 of the motor stator core 1 are substantially located in one plane, and/or the plurality of stepped ribs 134 of the stepped side portion of the pole shoe 12 of the motor stator core 1 are substantially located in one plane. The two planes are parallel to each other when the ratio of the widths of the core body portions 131 to the pole shoe portions 132 of the plurality of silicon steel strip members 13 is the same.

In the present embodiment, as shown in fig. 2, the silicon steel strip member 13 has a symmetrical i-shape, and includes a rectangular parallelepiped core main portion 131 and rectangular parallelepiped pole shoe portions 132 respectively transversely disposed at both ends of the core main portion 131. The side walls of the silicon steel strip member 13 are perpendicular to the upper and lower surfaces of the silicon steel strip member 13, and to the front and rear walls of the silicon steel strip member 13. Those skilled in the art will appreciate that the shape of the core body portion 131 and the pole shoe portion 132 shown in fig. 1 is merely an example, and particularly, the shape of the pole shoe portion 132 may be modified in various ways, such as a crescent shape. The central lines of the four silicon steel bar members 13 shown in fig. 1 coincide and are stacked in order from wide to narrow, one silicon steel bar member 13 on the outer ring side (the side with the largest width dimension) of the stator core 1 of the motor has a first thickness, the other silicon steel bar members 13 have the same second thickness, and the widths of the four silicon steel bar members 13 are increased or decreased in equal proportion, such as 1:0.8:0.64:0.512, wherein the first thickness is larger than the second thickness, so as to adjust the thickness of the increased core, and the rotor magnetic steel of the axial flux motor does not exceed the thickness range of the stator core. Those skilled in the art will appreciate that the width and thickness of the plurality of silicon steel strip members 13 constituting the motor stator core 1 may be configured according to the cross-sectional shape of the preformed motor stator core 1 (the core body 11 and the pole pieces 12).

According to the first embodiment of the present invention, as shown in fig. 3 and 4, the insulating chamfering unit is a chamfering bar 141 which is vertically provided at a position of a side corner 135 of the end surface of the inner ring side and the outer ring side of the core body 11. The chamfer strip 141 is fixed on the inner ring side wall 111, the outer ring side wall 112 or the step-shaped side wall 113 of the iron core main body 11, and a part of the chamfer strip 141 extends out of a fixing part of the chamfer strip and the iron core main body 11 and is in a suspension shape.

Because the chamfered bars 141 have a certain thickness and are arranged near the side corners 135 of the end surfaces of the inner ring side and the outer ring side of the core body 11, and are in a suspended state, when winding the winding on the core body 11, the suspended size of the part of the chamfered bars 141 extending out of the fixing part of the core body 11 can be adjusted, or the chamfered bars are additionally arranged on the step-shaped side wall 113 of the core body 11, so that the winding wound on the motor stator core 1 can be separated from the step-shaped side wall 113 of the core body 11, and thus, the step-shaped convex ridges 133 of the step-shaped side wall 113 cannot directly contact and damage the winding on the step-shaped side wall 113. Meanwhile, since the chamfer strip 141 has a certain thickness and a portion of the chamfer strip 141 protrudes out of its fixing portion with the core body 11, the windings wound on the inner ring side wall 111 and the outer ring side wall 112 of the core body 11 are also spaced apart from the inner ring side wall 111 and the outer ring side wall 112 of the core body 11, respectively.

According to the second embodiment of the present invention, as shown in fig. 5 and 6, the insulating chamfering unit is a pair of first chamfering boards 142, the first chamfering boards 142 are fixedly covered on the step-shaped side wall 113 of the core body 11, the first chamfering boards 142 are preferably matched with the shape of the step-shaped side wall 113 of the core body 11, especially, the first chamfering boards 142 have inner walls matched with the shape of the step-shaped side wall 113 of the core body 11, and both ends of the first chamfering boards 142 protrude from the inner ring side wall 111 and the outer ring side wall 112 of the core body 11 respectively, and are suspended.

After winding the winding, since the stepped side wall 113 of the core main body 11 is entirely covered with the first chamfer plate 142, the winding does not contact the stepped side wall 113 of the core main body 11. Meanwhile, since both ends of the first chamfering plate 142 protrude from the inner ring sidewall 111 and the outer ring sidewall 112 of the core body 11, respectively, and are suspended, the windings wound around the inner ring sidewall 111 and the outer ring sidewall 112 of the core body 11 are also spaced apart from the inner ring sidewall 111 and the outer ring sidewall 112 of the core body 11, respectively.

According to the third embodiment of the present invention, as shown in fig. 7 and 8, the insulating chamfering unit is a pair of second chamfering plates 143, the second chamfering plates 143 are respectively fixed to cover the inner ring side wall 111 and the outer ring side wall 112 of the core body 11, and both ends of the second chamfering plates 143 protrude from the step-shaped side wall 113 of the core body 11, respectively, and are suspended.

Since both ends of the second chamfering plate 143 protrude from the step-shaped sidewall 113 of the core body 11, respectively, and are suspended, when winding the winding on the core body 11, the winding wound on the stator core 1 of the motor can be spaced apart from the step-shaped sidewall 113 of the core body 11 by adjusting the suspended size of the both ends of the second chamfering plate 143 protruding from the step-shaped sidewall 113 of the core body 11, or a chamfering bar is additionally disposed on the step-shaped sidewall 113 of the core body 11, so that the step-shaped rib 133 of the step-shaped sidewall 113 does not directly contact and damage the winding on the step-shaped sidewall 113. Meanwhile, since the second chamfer plate 143 is integrally covered on the inner ring side wall 111 and the outer ring side wall 112 of the core main body 11, the winding does not contact the inner ring side wall 111 and the outer ring side wall 112 of the core main body 11, so that the winding wound on the inner ring side wall 111 and the outer ring side wall 112 of the core main body 11 is also spaced apart from the inner ring side wall 111 and the outer ring side wall 112 of the core main body 11, respectively.

According to the fourth embodiment of the present invention, as shown in fig. 9 and 10, the insulating chamfering unit is a ring member 144, the ring member 144 is fixed to and covers the outer side of the core main body 11, and the ring member 144 preferably has an inner wall matching the shape of the outer surface of the core main body 11. The annular member 144 has a separate structure, and is, for example, fastened to the core body 11, or the annular member 144 is integrally injection-molded to the core body 11.

In the present embodiment, the winding is wound on the annular member 144 without contacting the core body 11.

Further, in the first to fourth embodiments described above, it is preferable that a winding guide groove is provided on the outer surface of the insulating chamfer member to facilitate winding of the winding on the motor stator core 1.

According to the utility model discloses a second aspect, the embodiment of the utility model provides an axial flux motor is provided, include as above motor stator core 1.

The embodiment of the utility model provides a motor stator core and axial flux motor adopts the modularized design, and processing, manufacturing, assembly are simple, have the insulating chamfer part of certain thickness through the setting, have increased part strength, have guaranteed the insulating effect between winding and the iron core for the edges and corners and the burr of iron core can not damage the winding.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A motor stator core (1) is characterized by comprising a core main body (11) and an insulating chamfer component arranged on the outer side of the core main body (11),

the iron core main body (11) is provided with a pair of step-shaped side walls (113), and the step-shaped side walls (113) are provided with steps formed along the direction from the outer ring side to the inner ring side of the motor stator iron core (1);

the insulating chamfer component has a certain thickness and is arranged at least near a side corner (135) of the end face of the inner ring side and the outer ring side of the iron core main body (11) so as to enable a winding wound on the stator iron core (1) of the motor to be spaced from the iron core main body (11).

2. The stator core (1) of an electric machine according to claim 1, wherein the insulation chamfering member is a chamfering bar (141) which is longitudinally provided at a position of a side corner (135) of end faces of an inner ring side and an outer ring side of a core main body (11), and a part of the chamfering bar (141) protrudes out of a fixing portion thereof with the core main body (11).

3. The electric machine stator core (1) according to claim 2, characterized in that the chamfer bars (141) are fixed on the inner ring side wall (111), the outer ring side wall (112) or the stepped side wall (113) of the core body (11).

4. The stator core (1) of an electric machine according to claim 1, wherein the insulation chamfering member is a pair of first chamfering plates (142), the first chamfering plates (142) are fixedly covered on the stepped side wall (113) of the core main body (11), and both ends of the first chamfering plates (142) protrude from the inner ring side wall (111) and the outer ring side wall (112) of the core main body (11), respectively.

5. The stator core (1) of an electric machine according to claim 4, characterized in that the first chamfer (142) matches the shape of the stepped side wall (113) of the core body (11), the first chamfer (142) having an inner wall matching the shape of the stepped side wall (113) of the core body (11).

6. The stator core (1) of an electric machine according to claim 1, wherein the insulation chamfering member is a pair of second chamfering plates (143), the second chamfering plates (143) are respectively fixedly covered on the inner ring side wall (111) and the outer ring side wall (112) of the core main body (11), and both ends of the second chamfering plates (143) respectively protrude from the stepped side wall (113) of the core main body (11).

7. The stator core (1) of an electric machine according to claim 1, wherein the insulation chamfering unit is an annular member (144), and the annular member (144) is fixed to and covers the outside of the core body (11).

8. The electric machine stator core (1) according to claim 7, characterized in that the annular member (144) has an inner wall matching the shape of the outer surface of the core body (11); the annular member (144) is of a separate structure, or the annular member (144) is integrally injection-molded on the core body (11).

9. Motor stator core (1) according to claim 2, 3 or 6, characterized in that chamfered bars are provided on the stepped side walls (113) of the core body (11) of the motor stator core (1).

10. An electric machine stator core (1) according to claim 1, characterized in that the outer surface of the insulating chamfer member is provided with winding guide slots.

11. Motor stator core (1) according to claim 1, wherein the motor stator core (1) further comprises pole shoes (12) respectively arranged at both ends of the core body (11),

the motor stator core (1) comprises a plurality of silicon steel strip members (13), wherein each silicon steel strip member (13) comprises a core main body part (131) and pole shoe parts (132) respectively arranged at two ends of the core main body part (131);

the lengths of the core body portions (131) of the plurality of silicon steel strip members (13) are the same, the widths of at least two core body portions (131) of the plurality of silicon steel strip members (13) are different, and the widths of at least two pole shoe portions (132) of the plurality of silicon steel strip members (13) are different;

the silicon steel strip members (13) are stacked and fixed in a mode that the center lines of the core main body parts (131) are aligned and according to the width size sequence of the core main body parts (131) to form the core main body (11) with step-shaped side edge parts and/or the pole shoe (12) with step-shaped side edge parts.

12. The electric machine stator core (1) according to claim 11, wherein the plurality of silicon steel strip members (13) comprises at least a first silicon steel strip member and a second silicon steel strip member, and a width dimension relationship based on a core body portion of the first silicon steel strip member and a core body portion of the second silicon steel strip member is not opposite to a width dimension relationship based on a pole shoe portion of the first silicon steel strip member and a pole shoe portion of the second silicon steel strip member.

13. Stator core (1) for an electrical machine according to claim 12, characterized in that the stepped ridges (133) of the stepped side portions of the core body (11) lie substantially in one plane and/or the stepped ridges (134) of the stepped side portions of the pole shoes (12) lie substantially in one plane.

14. The electric machine stator core (1) according to claim 12, wherein the ratio of the width of the core body portion of the first silicon steel strip member to the width of the pole shoe portion of the first silicon steel strip member is the same as the ratio of the width of the core body portion of the second silicon steel strip member to the width of the pole shoe portion of the second silicon steel strip member.

15. The stator core (1) of an electric machine according to claim 11, wherein one or more silicon steel strip members (13) of the plurality of silicon steel strip members (13) are formed by laminating a plurality of silicon steel sheets, the silicon steel sheets are oriented silicon steel sheets, and the orientation direction of the silicon steel sheets is the same as the magnetic flux direction of the core.

16. Stator core (1) for an electrical machine according to claim 11, wherein said silicon steel strip element (13) is of symmetrical i-shape, the side walls of said silicon steel strip element (13) being smooth side walls.

17. An axial flux machine, characterized in that it comprises a stator core (1) of an electrical machine according to any one of claims 1-16.