Charging apparatus for a combustion engine

Patent metadata

Field	Value
Publication number	US-2016123336-A1
Application number	US-201414898200-A
Country	US
Kind code	A1
Filing date	Jun 23, 2014
Priority date	Jun 28, 2013
Publication date	May 5, 2016
Grant date	—

Abstract

A charging apparatus ( 20 ) for a combustion engine, having a compressor ( 1 ) which has a compressor housing ( 2 ) in which a compressor wheel ( 3 ) is arranged, the compressor wheel being mounted on one end ( 4 ) of a rotor shaft ( 5 ), and which has a compressor housing rear wall ( 6 ); and having an electric motor ( 7 ) which has a stator winding ( 12 ) which surrounds a magnet ( 11 ), which is arranged on the rotor shaft ( 5 ), on the outside. The stator winding ( 12 ) is an iron-free stator winding, and the electric motor ( 7 ) is a brushless DC motor.

First claim

1 . A charging apparatus ( 20 ) for a combustion engine, comprising
a compressor ( 1 ) which has a compressor housing ( 2 )
in which a compressor wheel ( 3 ) is arranged, said compressor wheel being mounted on one end ( 4 ) of a rotor shaft ( 5 ), and
which has a compressor housing rear wall ( 6 ) which is adjacent to a compressor wheel rear side ( 36 ); and
an electric motor ( 7 )
which has a stator winding ( 12 ) which surrounds a magnet ( 11 ), wherein the magnet is arranged on the outside of a shaft ( 8 ,

wherein
the stator winding ( 12 ) is arranged on a slot-free, cylindrical inner surface ( 37 ) of a laminated core ( 18 ), and
the electric motor ( 7 ) is a brushless motor.

2 . The charging apparatus as claimed in claim 1 , wherein the laminated core ( 18 ) is annular.

3 . The charging apparatus as claimed in claim 2 , wherein the laminated core ( 18 ) is arranged in a receiving recess ( 19 ) in the stator winding ( 12 ).

4 . The charging apparatus as claimed in claim 2 , wherein the laminated core ( 18 ) projects radially beyond the outer circumferential surface ( 31 ) of the stator winding ( 12 ) by way of its outer circumferential surface ( 32 ).

5 . The charging apparatus as claimed in claim 3 , further comprising a stator housing ( 13 ) which surrounds the stator winding ( 12 ) on the outside.

6 . The charging apparatus as claimed in claim 1 , comprising a dirt-protection cover ( 14 ) arranged on the compressor housing rear wall ( 6 ).

7 . The charging apparatus as claimed in claim 1 , wherein the shaft ( 8 ) and the rotor shaft ( 5 ) are an integral component.

8 . The charging apparatus as claimed in claim 1 , wherein the compressor housing rear wall ( 6 ) of the compressor housing ( 2 ) has a cooling jacket ( 10 ).

9 . The charging apparatus as claimed in claim 1 , wherein winding taps ( 34 , 35 ) are provided on an end surface ( 33 ) of the stator winding ( 12 ).

10 . The charging apparatus as claimed in claim 1 , wherein the combustion engine is an internal combustion engine or a fuel cell.

11 . A method for improving the starting behavior of an electrically driven compressor of a charging apparatus for a combustion engine, comprising the following method steps:
applying a voltage to a coil of an electric motor of the compressor of the charging apparatus for orienting a rotor of the electric motor in a defined rotor position; and accelerating the rotor from this defined rotor position.

12 . The method as claimed in claim 11 , wherein the voltage is applied before an immediately imminent compression process.

Assignees

• Borgwarner Inc

Inventors

• Spinner Gerd
• Metz Dietmar
• Bleil Andreas
• Ritzhaupt Victor

Classifications

• H02K3/04

  Windings characterised by the conductor shape, form or construction, e.g. with bar conductors · CPC title

• F04D25/068

  Mechanical details of the pump control unit (pump control details F04D27/00) · CPC title

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• F02B39/005

  Cooling of pump drives · CPC title

• H02K3/47

  Air-gap windings, i.e. iron-free windings · CPC title