Reluctance motor

Patent metadata

Field	Value
Publication number	US-9520719-B2
Application number	US-201313964349-A
Country	US
Kind code	B2
Filing date	Aug 12, 2013
Priority date	Feb 10, 2011
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

A reluctance motor having a rotor and a stator that has a wound core, around which a stator coil is wound and which is open on one side and has legs, said legs being arranged around the periphery and forming spaced-apart pairs of legs. Multiple rotor teeth which are distributed around the periphery and periodically establish a magnetic flux between the legs radially engage between the legs. In order to positively change the characteristic curve of the magnetic flux of the legs and teeth, the teeth continuously form an area overlap with the legs in the direction of rotation of the rotor in accordance with the angle of rotation.

First claim

The invention claimed is:

1. A reluctance motor comprising:
a rotor including a plurality of teeth distributed over a periphery of the rotor; and
a stator including at least one wound core open at one side and wound by a stator coil, and a plurality of legs arranged over a periphery of the stator and forming pairs of legs spaced apart from each other in an axial direction,
wherein the plurality of teeth of the rotor are arranged between the pairs of legs in the axial direction,
the plurality of teeth of the rotor periodically generating a magnetic flux between the pairs of legs, and
the plurality of teeth being wedge-shaped when viewed in the axial direction such that leading edges of the teeth gradually overlap with the pairs of legs as the plurality of teeth move in a traveling direction of the rotor, and
the leading edges of the teeth are angled relative to trailing edges of the pairs of legs such that an acute angle is formed between a leading edge and a trailing edge when the leading edge begins to overlap with the trailing edge.

2. The reluctance motor according to claim 1 , wherein the motor comprises a transverse flux machine.

3. The reluctance motor according to claim 2 , wherein the plurality of teeth each include a pair of flux deflectors mounted at sides of the teeth and forming a part of the wedge shape.

4. The reluctance motor according to claim 1 , wherein the rotor is an external rotor.

5. The reluctance motor according to claim 1 , wherein the motor is formed from several phases arranged along an axis of rotation (A) of the rotor with respectively one of the stator coils and the legs distributed over the periphery and forming leg levels, which limit the stator coils from each other, forming the wound core.

6. The reluctance motor according to claim 5 , wherein the legs of the phases are off-set in a circumferential direction along the axis of rotation (A).

7. The reluctance motor according to claim 1 , wherein the plurality of teeth are positioned such that the leading edge begins to overlap with the trailing edge at a first radial portion of the trailing edge prior to overlapping with a second radial portion of the trailing edge.

8. The reluctance motor according to claim 7 , wherein the first radial portion is distal and the second radial portion is proximal with respect to the stator coil.

9. The reluctance motor of claim 1 , wherein the plurality of teeth each include a rectangular base and a pair of wedge-shaped flux deflectors at opposing sides of the rectangular base.

10. A reluctance motor comprising:
a rotor including a plurality of teeth distributed over a periphery of the rotor; and
a stator including at least one wound core open at one side and wound by a stator coil, and a plurality of legs arranged over a periphery of the stator and forming pairs of legs spaced apart from each other in an axial direction,
wherein the plurality of teeth of the rotor are arranged between the pairs of legs in the axial direction,
the plurality of teeth of the rotor periodically generating a magnetic flux between the pairs of legs, and
the plurality of teeth including leading edges that are angled relative to trailing edges of the pairs of legs and respectively begin to overlap with the trailing edges of the pairs of legs at first radial portions of the trailing edges prior to overlapping with second radial portions of the trailing edges as the plurality of teeth move in a traveling direction of the rotor, such that an acute angle is formed between a leading edge and a trailing edge when the leading edge begins to overlap with the trailing edge.

11. The reluctance motor according to claim 10 , wherein the first radial portions are distal and the second radial portions are proximal with respect to the stator coil.

12. The reluctance motor of claim 10 , wherein the plurality of teeth each include a rectangular base and a pair of wedge-shaped flux deflectors at opposing sides of the rectangular base.

Assignees

• Schaeffler Technologies Ag

Inventors

• Gramann Matthias

Classifications

• H02J3/36 Primary

  Arrangements for transfer of electric power between AC networks via high-voltage DC [HVDC] links; Arrangements for transfer of electric power between generators and networks via HVDC links · CPC title

• H02K2201/12

  Transversal flux machines · CPC title

• H02K19/103 Primary

  Motors having windings on the stator and a variable reluctance soft-iron rotor without windings · CPC title