Stator For A Permanent-Excited Electric Motor/Induction Machine

Abstract

A permanent-excited electric motor/induction machine has a laminated core (1) made of stator laminations (11) and a yoke winding (2). The yoke winding (2) has an inner winding part (21) and an outer winding port 22. The inner winding part 21 is arranged radially inside the stator lamination (11) in at least one winding receptacle (3). The outer winding part (22) is arranged radially outside the stator lamination (11) on an outer surface (4) of the laminated core (1). A soft-magnetic shield (5) is formed on the entire circumference around the outer winding part (22). At least one nonmagnetic connecting element (6), that contacts the stator lamination (11) and the soft-magnetic shield ring (5), is arranged between the stator lamination (11) and the soft-magnetic shield (5).

Claims

1. A stator for a permanent-excited electric motor/induction machine with a laminated core made of stator laminations and a yoke winding, the yoke winding comprises: an inner winding part and an outer winding part, the inner winding part is arranged radially inside the stator lamination in at least one winding receptacle, the outer winding part is arranged radially outside the stator lamination on an outer surface of the laminated core; a soft-magnetic shield is formed on the entire circumference around the outer winding part; and at least one nonmagnetic connecting element, that contacts the stator lamination and the soft-magnetic shield ring, is arranged between the stator lamination and the soft-magnetic shield.

2. The stator as claimed in claim 1, wherein the laminated core is integrally formed.

3. The stator as claimed in claim 1, wherein the at least one nonmagnetic connecting element is made of plastic and a nonmagnetic connecting element is arranged in each case between adjacent winding poles of the yoke winding.

4. The stator as claimed in claim 3, wherein the respective nonmagnetic connecting element is arranged spaced apart from the respective adjacent winding poles of the yoke winding.

5. The stator as claimed in claim 1, wherein the at least one nonmagnetic connecting element is a potting that is formed over the outer winding part.

6. The stator as claimed in claim 1, wherein the at least one winding receptacle is formed as a groove.

7. The stator as claimed in claim 1, wherein the yoke winding is formed 6-poled or 6-grooved.

8. The stator as claimed in claim 1, wherein the yoke winding is formed 12-poled or 12-grooved.

9. An induction machine/permanent-excited electric motor with a stator as claimed in claim 1, wherein a rotor with permanent magnets is arranged inside the stator lamination.

10. The induction machine/permanent-excited electric motor as claimed in claim 9, wherein it is connected directly to a 2-stage inverter.

Description

DRAWINGS

[0020] Other advantageous refinements of the disclosure are characterized in the dependent claims or are described in more detail hereinafter together with the description of the preferred embodiment of the disclosure on the basis of the figures. In the figures:

[0021] FIG. 1 is a schematic sectional view of an induction machine/permanent-excited electric motor with a rotor and a 6-pole or 6-groove stator with a soft-magnetic shield and a nonmagnetic connecting element.

[0022] FIG. 2 is a further schematic sectional view of an induction machine/permanent-excited electric motor having a rotor and a 6-pole or 6-groove stator with a soft-magnetic shield and a nonmagnetic connecting element.

[0023] FIG. 3 is a schematic sectional view of an induction machine/permanent-excited electric motor with a rotor and a 12-pole or 12-groove stator with a soft-magnetic shield and a nonmagnetic connecting element.

[0024] FIG. 4 is a further schematic sectional view of an induction machine/permanent-excited electric motor with a rotor and a 6-pole or 6-groove stator with a soft-magnetic shield and a nonmagnetic connecting element.

[0025] FIG. 5 is a further schematic sectional view of an induction machine/permanent-excited electric motor with a rotor and a 12-pole or 12-groove stator with a soft-magnetic shield and a nonmagnetic connecting element.

DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0027] The figures are exemplary and schematic. The same reference numerals in the figures indicate the same functional and/or structural features.

[0028] FIG. 1 discloses a schematic sectional view of an induction machine/permanent-excited electric motor with a rotor 8 and a 6-pole or 6-groove stator that includes a soft-magnetic shield 5 and a nonmagnetic connecting element 6. The stator of the permanent-excited electric motor/induction machine comprises a laminated core 1 made of stator laminations 11 and a 6-pole or 6-groove yoke winding 2. In addition, the laminated core 1 is integrally formed.

[0029] Furthermore, the rotor 8 includes permanent magnets and is arranged inside the stator lamination 11. In addition, the induction machine/permanent-excited electric motor is directly connected to a 2-stage inverter (not shown).

[0030] Furthermore, the yoke winding 2 made 6-poled or 6-grooved includes, in each case, an inner winding part 21 and an outer winding part 22. The inner winding part 21 is arranged radially inside the stator lamination 11 in a winding receptacle 3. The outer winding part 22 is arranged radially outside the stator lamination 11 on an outer surface 4 of the laminated core 1.

[0031] The inner winding part 21 and the outer winding part 22 are connected to one another via a stator yoke. The respective winding receptacle 3 is formed as a groove. In addition, a soft-magnetic shield 5 is formed on the entire circumference around the outer winding part 22.

[0032] Six nonmagnetic connecting elements 6, which contact the stator lamination 11 and the soft-magnetic shield ring 5, are arranged between the stator lamination 11 and the soft-magnetic shield ring 5. The nonmagnetic connecting elements 6 are made of plastic. One of the nonmagnetic connecting element 6 is arranged in each case between adjacent winding poles 7 of the winding 2. In addition, the respective nonmagnetic connecting element 6 is arranged spaced apart from the respective adjacent winding poles 7 of the winding 2.

[0033] Because the following embodiments essentially have the same functional and/or structural features, only different features are discussed.

[0034] FIG. 2 shows a further schematic sectional view of an induction machine/permanent-excited electric motor with a rotor 8 and a 6-pole or 6-groove stator that includes a soft-magnetic shield 5 and a nonmagnetic connecting element 6. The yoke winding 2 of the stator is 6-poled or 6-grooved. The nonmagnetic connecting element 6 is a potting formed over the respective outer winding part 22. Furthermore, the respective winding receptacle 3 is formed as a groove.

[0035] FIG. 3 shows a schematic sectional view of an induction machine/permanent-excited electric motor with a rotor 8 and a 12-pole or 12-groove stator that includes a soft-magnetic shield 5 and a nonmagnetic connecting element 6. The respective winding receptacle 3 is formed here as a groove. The yoke winding 2 of the stator is formed 12-poled or 12-grooved.

[0036] FIG. 4 shows a further schematic sectional view of an induction machine/permanent-excited electric motor with a rotor 8 and a 6-pole or 6-groove stator with a soft-magnetic shield 5 and a nonmagnetic connecting element 6. In the illustrated embodiment variant, the yoke winding 2 of the stator is made 6-poled or 6-grooved. The nonmagnetic connecting element 6 is a potting that is formed over the respective outer winding part 22. In addition, the respective winding receptacle 3 is formed without a groove.

[0037] FIG. 5 shows a further schematic sectional view of an induction machine/permanent-excited electric motor with a rotor 8 and a 12-pole or 12-groove stator with a soft-magnetic shield 5 and a nonmagnetic connecting element 6. The yoke winding 2 of the stator is formed 12-poled or 6-grooved. The nonmagnetic connecting element 6 is a potting that is formed over the respective outer winding part 22. In addition, the respective winding receptacle 3 is formed without a groove.

[0038] The disclosure is not restricted in its embodiment to the preferred exemplary embodiments specified above. Rather, a number of variants is conceivable make use of the described solution even in fundamentally differently designed embodiments

[0039] The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.