Stator system for an electric motor

Patent metadata

Field	Value
Publication number	US-9787155-B2
Application number	US-201414549678-A
Country	US
Kind code	B2
Filing date	Nov 21, 2014
Priority date	May 24, 2012
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A stator system for an electric motor has multiple coil formers and stator windings that are wound on the coil formers. The stator windings are distributed over the circumference of the stator system and are arranged to form a substantially circular stator star. A number of the stator windings are electrically insulated in the axial direction in each case by way of a phase separator. The stator windings in each case of two coil formers are electrically connected as a coil pair in an electrically conductive manner by a conductor track. The conductor track is retained by a separating web that is arranged in the axial direction above the allocated phase separator and that extends in a radial direction.

First claim

The invention claimed is:

1. A stator system for an electric motor, comprising:
a plurality of coil formers;
stator windings wound on said coil formers, said stator windings being distributed over a circumference of the stator system and disposed to form a substantially circular stator star having an axis extending substantially coaxially with an axis of the electric motor;
a plurality of conductor tracks, each said conductor track electrically connecting said stator windings of at least two respective said coil formers to form a coil pair;
a plurality of phase separators disposed to electrically insulate respective said stator windings in an axial direction, each said phase separator being disposed between at least one of said conductor tracks and a respective said stator winding; and
a plurality of separating webs, each said separating web assembled to a respective said coil former and retaining at least one of said conductor tracks, each said separating web being disposed in an axial direction above a respective said phase separator, and each said separating web having at least one recess formed therein that is open towards the respective said phase separator and is configured to receive said at least one of said conductor tracks.

2. The stator system according to claim 1 , wherein each said separating web is oriented to extend radially.

3. The stator system according to claim 1 , wherein each said separating web is latched to the respective said coil former.

4. The stator system according to claim 1 , wherein each said phase separator extends substantially over an entire axial length and a radial width of the respective said coil former.

5. The stator system according to claim 1 , wherein each said separating web, in an assembled state, extends substantially over an entire radial width of the respective said coil former of said stator star.

6. The stator system according to claim 1 , wherein said at least one recess, in cross section, is a circular segment greater than 180°.

7. The stator system according to claim 1 , wherein said recess in each said separating web is an inclined recess.

8. The stator system according to claim 1 , wherein said at least one recess is one of a plurality of recesses that are spaced apart from one another in a radial direction.

9. The stator system according to claim 1 , wherein each said separating web is latched to the respective said coil former by way of a latching connection comprising a latching contour formed in the respective said coil former and provided with latching hooks, and wherein said separating web lies in said latching contour.

10. The stator system according to claim 1 , which comprises a securing element formed onto each said separating web and lying radially against a corresponding stop surface of the respective said coil former.

11. The stator system according to claim 1 , wherein each said separating web is articulated to the respective said coil former via a film hinge.

12. An electric motor, comprising a stator system according to claim 1 .

13. The electric motor according to claim 12 , configured as a servo drive of a motor vehicle steering system.

Assignees

• Brose Fahrzeugteile
• Brose Fahrzeugteile Gmbh & Co Kg

Inventors

• Portner Stefan
• Steegmueller Horst
• Wust Stefan

Classifications

• H02K3/34

  between conductors or between conductor and core, e.g. slot insulation · CPC title

• H02K3/38 Primary

  around winding heads, equalising connectors, or connections thereto · CPC title

• H02K3/46

  Fastening of windings on the stator or rotor structure · CPC title

• H02K3/28 Primary

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H02K3/522 Primary

  for generally annular cores with salient poles · CPC title