External rotor of a device for the contactless transmission of rotary movements

Patent metadata

Field	Value
Publication number	US-10411538-B2
Application number	US-201615062033-A
Country	US
Kind code	B2
Filing date	Mar 4, 2016
Priority date	Mar 5, 2015
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

An external rotor of a device for contactless transmission of rotary movements, for example of an electric motor, a magnetic transmission, a generator or a magnetic coupling, may include a plurality of different permanent magnet segments configured ring segment-like that are alternatingly arranged in a closed permanent magnet segment ring. At least one lateral surface of at least one permanent magnet segment of the plurality of permanent magnet segments may deviate from a radial direction. The at least one permanent magnet segment via the at least one lateral surface may be in contact with another permanent magnet segment of the plurality of permanent magnet segments.

First claim

The invention claimed is:

1. An external rotor of a device for contactless transmission of rotary movements, comprising:
a plurality of different permanent magnet segments configured ring segment-like and alternatingly arranged to define a closed permanent magnet segment ring, wherein the plurality of permanent magnet segments are wedge shaped and have an arc-shaped radially inner side, an arc-shaped radially outer side, opposing axial face ends, and at least one lateral surface deviating from a radial direction, and wherein the at least one lateral surface of adjacent permanent magnet segments of the plurality of permanent magnet segments contact one another;
wherein the closed permanent magnet segment ring is arranged completely within a pocket of the external rotor such that each of the plurality of permanent magnet segments on the outer radial side and on the opposing axial face ends engage the external rotor.

2. The external rotor according to claim 1 ,
wherein the plurality of permanent magnet segments includes a number of first permanent magnet segments configured ring segment-like and a complementary number of second permanent magnet segments configured ring segment-like, which are alternatingly arranged to define the closed permanent magnet segment ring;
wherein the number of first permanent magnet segments have two lateral surfaces conically tapering towards an inside of the closed permanent magnet segment ring; and
wherein the number of second permanent magnet segments have two lateral surfaces conically tapering towards an outside of the closed permanent magnet segment ring.

3. The external rotor according to claim 1 ,
wherein the plurality of permanent magnet segments includes a number of third permanent magnet segments configured ring segment-like, a complementary number of fourth permanent magnet segments configured ring segment-like, and a number of fifth permanent magnet segments configured ring segment-like, the number of third permanent magnet segments and the number of forth permanent magnet segments alternatingly arranged with respect to one another with the number of fifth permanent magnet segments respectively arranged therebetween to define the closed permanent magnet segment ring,
the number of third permanent magnet segments and the number of fourth permanent magnet segments have two lateral surfaces which conically taper towards an inside of the closed permanent magnet segment ring, and
the number of fifth permanent magnet segments have two lateral surfaces which conically taper towards an outside of the closed permanent magnet segment ring.

4. The external rotor according to claim 3 , wherein the number of third permanent magnet segments and the number of fourth permanent magnet segments are configured identical in shape.

5. The external rotor according to claim 3 , wherein the number of fifth permanent magnet segments are configured as transverse magnets having magnetic field lines running in a circumferential direction between two adjacent permanent magnet segments.

6. The external rotor according to claim 1 ,
wherein the plurality of permanent magnet segments includes a number of sixth permanent magnet segments configured ring segment-like, a number of seventh permanent magnet segments configured ring segment-like, and a number of eighth permanent magnet segments configured ring segment-like, the number of sixth permanent magnet segments and the number of seventh permanent magnet segments alternatingly arranged with respect to one another with the number of eighth permanent magnet segments respectively arranged therebetween to define the closed permanent magnet segment ring,
the number of sixth permanent magnet segments and the number of seventh permanent magnet segments have two lateral surfaces which conically taper towards an outside of the closed permanent magnet segment ring, and
the number of eighth permanent magnet segments have two lateral surfaces that conically taper towards an inside of the closed permanent magnet segment ring.

7. The external rotor according to claim 6 , wherein the number of sixth permanent magnet segments and the number of seventh permanent magnet segments are configured identical in shape.

8. The external rotor according to claim 6 , wherein the number of sixth permanent magnet segments includes at least three sixth permanent magnet segments and the number of seventh permanent magnet segments includes at least three seventh permanent magnet segments, and wherein the number of eighth permanent magnet segments includes at least six eighth permanent magnet segments.

9. The external rotor according to the claim 6 , wherein the number of eighth permanent magnet segments are configured as transverse magnets having magnetic field lines running in a circumferential direction between two adjacent permanent magnet segments.

10. The external rotor according to claim 1 , wherein the at least one lateral surface includes a first lateral surface and a second lateral surface that deviate from the radial direction such that a plane extending along the first lateral surface intersects a plane extending along the second lateral surface at a point other than a center of the closed permanent magnet segment ring.

11. The external rotor according to claim 10 , wherein the plane extending along the first lateral surface intersects the plane extending along the second lateral surface one of i) radially inside the closed permanent magnet segment ring other than at the center and ii) radially outside of the closed permanent magnet segment ring.

12. A device configured as an electric motor, a generator or a magnetic coupling, comprising:
an external rotor including a plurality of different permanent magnet segments each configured as a ring segment having a wedge shape with an arc-shaped radially inner side, an arc-shaped radially outer side, opposing axial face ends, and two lateral surfaces deviating from a radial direction such that respective planes of the two lateral surfaces intersect, the plurality of permanent magnet segments alternately arranged to define a closed permanent magnet segment ring;
wherein the two lateral surfaces of adjacent permanent magnet segments of the plurality of permanent magnet segments deviate from the radial direction differently; and
wherein the plurality of permanent magnet segments are arranged completely within a tubular-shaped pocket of the external rotor and form the closed permanent magnet segment ring therein such that external rotor engages an outer radial face and opposing axial face ends of the closed permanent magnet segment ring.

13. The device according to claim 12 , wherein the external rotor engages about each of the plurality of permanent magnet segments on the outer radial side and on the opposing axial face ends.

14. The device according to claim 12 , wherein the plurality of permanent magnet segments includes a number of first permanent magnet segments alternately arranged with a complementary number of second permanent magnet segments to define the closed permanent magnet segment ring; and
wherein the number of first permanent magnet segments have a lateral surface conically tapering towards a radial inside of the closed permanent magnet segment ring and the number of second permanent magnet segments have a lateral surface conically tapering towards a radial outside of the closed permanent magnet segment ring.

15. The device according to claim 14 , wherein the number of first permanent magnet segments includes at least three first permanent magnet segments and the number of second permanent magnet segments includes at leas

Assignees

• Mahle Int Gmbh

Inventors

• Neubauer Andreas
• Riemay Thomas

Classifications

• H02K49/102

  Magnetic gearings, i.e. assembly of gears, linear or rotary, by which motion is magnetically transferred without physical contact (magnetized gearings with physical contact F16H13/12, F16H49/005) · CPC title

• H02K1/2786 Primary

  Outer rotors · CPC title

• H02K1/2791 Primary

  Surface mounted magnets; Inset magnets · CPC title