Energy transmission device

Patent metadata

Field	Value
Publication number	US-2016372991-A1
Application number	US-201615183295-A
Country	US
Kind code	A1
Filing date	Jun 15, 2016
Priority date	Jun 16, 2015
Publication date	Dec 22, 2016
Grant date	—

Abstract

An energy transmission device for contactless transmission of electric energy includes a primary coil device and a secondary coil device, the secondary coil device being supported for rotation relative to the primary coil device about a rotation axis. The primary coil device has a primary yoke element, multiple primary leg elements and a primary winding, the secondary coil device having a secondary yoke element, multiple secondary leg elements and a secondary winding, said primary yoke element and/or the secondary yoke element being made of a laminated core. When viewed in longitudinal section of the rotation axis, the primary yoke element rests against at least one of the primary leg elements and/or the secondary yoke element rests against at least one of the secondary leg elements along a respective joint edge, said respective joint edge and/or a longitudinal center axis of the respective joint edge being slanted relative to the rotation axis.

First claim

What is claimed is:

1 . An energy transmission device for contactless transmission of electric energy, comprising:
a primary coil device and a secondary coil device, said secondary coil device being supported for rotation relative to the primary coil device about a rotation axis, said primary coil device having a primary yoke element, multiple primary leg elements and a primary winding, said secondary coil device having a secondary yoke element, multiple secondary leg elements and a secondary winding, said primary yoke element and/or said secondary yoke element being made of a laminated core, wherein, when viewed in longitudinal section relative to the rotation axis, the primary yoke element rests against at least one of the primary leg elements and/or the secondary yoke element rests against at least one of the secondary leg elements along a respective joint edge, said respective joint edge and/or a longitudinal center axis of the respective joint edge being slanted relative to the rotation axis.

2 . The energy transmission device of claim 1 , wherein the primary leg elements and/or the secondary leg elements are each made of a laminated core, which rests against the primary yoke element or the secondary yoke element along the respective joint edge.

3 . The energy transmission device of claim 1 , wherein when viewed in longitudinal section, the joint edge extends continuously straight or is stepped.

4 . The energy transmission device of claim 1 , wherein the primary yoke element and/or the secondary yoke element are curved in circumferential direction.

5 . The energy transmission device of claim 4 , wherein the primary yoke element and/or the secondary yoke element have a constant radius in circumferential direction relative to the rotation axis.

6 . The energy transmission device of claim 1 , wherein the primary leg elements and/or the secondary leg elements are circular.

7 . The energy transmission device of claim 1 , wherein the primary leg elements and/or the secondary leg elements have at least one radial slot and/or a comb structure, which traverses the primary leg elements or the secondary leg elements in radial direction.

8 . The energy transmission device of claim 1 , wherein the primary winding and/or the secondary winding have a flat ribbon conductor or a flat ribbon cable.

9 . The energy transmission device of claim 1 , further comprising a plate arranged on a front face of the secondary coil device, said plate having a rectifier circuit connected to the secondary winding.

10 . The energy transmission device of claim 9 , wherein components of the rectifier circuit are supported on the secondary coil device.

11 . The energy transmission device of claim 10 , wherein the components of the rectifier circuit are supported in the secondary yoke element and/or in radial direction.

12 . An electric machine comprising:
a stator; a rotor supported for rotation relative to the stator about a rotation axis; and an energy transmission device comprising a primary coil device and a secondary coil device, said secondary coil device being supported for rotation relative to the primary coil device about a rotation axis, said primary coil device having a primary yoke element, multiple primary leg elements and a primary winding, said secondary coil device having a secondary yoke element, multiple secondary leg elements and a secondary winding, said primary yoke element and/or said secondary yoke element being made of a laminated core, wherein, when viewed in longitudinal section relative to the rotation axis, the primary yoke element rests against at least one of the primary leg elements and/or the secondary yoke element rests against at least one of the secondary leg elements along a respective joint edge, said respective joint edge and/or a longitudinal center axis of the respective joint edge being slanted relative to the rotation axis.

Assignees

• Audi Ag

Inventors

• Brune Kai
• Possen Max
• Brune Andre
• Steinbrink Jörn
• Weber Jan-Niklas
• Selke Carsten
• Ponick Bernd

Classifications

• H02K11/33 Primary

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title

• H01F27/24

  Magnetic cores · CPC title

• H02K47/18 Primary

  AC/AC converters · CPC title

• H01F27/245

  made from sheets, e.g. grain-oriented (H01F27/26 takes precedence) · CPC title

• H01F38/18

  Rotary transformers · CPC title