A high speed switch reluctance motor on a turbocharger

Patent metadata

Field	Value
Publication number	US-2016153459-A1
Application number	US-201414889956-A
Country	US
Kind code	A1
Filing date	May 12, 2014
Priority date	May 22, 2013
Publication date	Jun 2, 2016
Grant date	—

Abstract

A rotor assembly ( 164 ) is provided for a switched reluctance motor ( 160 ) in which nonmetallic, nonconductive pins ( 5 ) pass through a stack ( 2 ) of magnetic laminate plates ( 3 ).

First claim

What is claimed:

1 . A rotor assembly ( 164 ) of a switched reluctance motor ( 160 ) comprising:
a shaft ( 142 ); a stack ( 2 ) of magnetic laminated plates ( 3 ) mounted on the shaft ( 142 ); a first collar ( 6 ) mounted on the shaft ( 142 ) at one end of the stack ( 2 ); a second collar ( 8 ) mounted on the shaft ( 142 ) at an opposed end of the stack ( 2 ); and nonconductive, nonmetallic pins ( 5 ) that are configured to transmit rotational force of the stack ( 2 ) to the shaft ( 142 ) via the first collar ( 6 ) and the second collar ( 8 ).

2 . The rotor assembly ( 164 ) of claim 1 , wherein the pins ( 5 ) extend through the stack ( 2 ) of magnetic laminated plates ( 3 ) such that respective ends ( 5 a, 5 b ) of the pins ( 5 ) are connected to each of the first collar ( 6 ) and the second collar ( 8 );
the pins ( 5 ) are parallel to the shaft ( 2 ); and the first collar ( 6 ) is not in contact with the stack ( 2 ) of magnetic laminated plates ( 3 ), and the second collar ( 8 ) is in contact with the stack of magnetic laminated plates ( 3 ).

3 . The rotor assembly ( 164 ) according to claim 2 further comprising a spring washer ( 7 ) placed between the first collar ( 6 ) and the stack of magnetic laminated plates ( 3 ).

4 . The rotor assembly ( 164 ) according to claim 3 comprising two to four pins ( 5 ).

5 . The rotor assembly ( 164 ) according to claim 2 comprising two to four pins ( 5 ).

6 . The rotor assembly ( 164 ) according to claim 1 wherein the pins ( 5 ) are formed of a material selected from the group consisting of polyetherketones, polyimide resins, and phenolic resins.

7 . The rotor assembly ( 164 ) according to claim 2 wherein the pins ( 5 ) are formed of a material selected from the group consisting of polyetherketones, polyimide resins, and phenolic resins.

8 . The rotor assembly ( 164 ) according to claim 1 , wherein the pins ( 5 ) are arranged symmetrically about a rotational axis (R) of the shaft ( 142 ).

9 . The rotor assembly ( 164 ) according to claim 1 , wherein the first collar ( 6 ) and the second collar ( 8 ) are fixed relative to the shaft ( 142 ).

10 . The rotor assembly ( 164 ) of claim 2 , wherein the respective ends ( 5 a, 5 b ) of the pins ( 5 ) are tightly fitted within openings ( 9 ) in each of the first collar ( 6 ) and the second collar ( 8 ).

11 . An exhaust gas turbocharger ( 100 ) that includes
a compressor section ( 12 ) including a compressor wheel ( 130 ), a turbine section ( 102 ) including a turbine wheel ( 112 ), a bearing housing ( 140 ) that supports a shaft ( 142 ) that connects the compressor wheel ( 130 ) to the turbine wheel ( 112 ), and a switched reluctance motor ( 160 ) disposed in the bearing housing ( 140 ), the motor ( 160 ) comprising: a rotor assembly ( 164 ) that includes
a stack ( 2 ) of magnetic laminated plates ( 3 ) mounted on the shaft ( 142 );
a first collar ( 6 ) mounted on the shaft ( 142 ) at one end of the stack ( 2 );
a second collar ( 8 ) mounted on the shaft ( 142 ) at an opposed end of the stack ( 2 ); and
nonconductive, nonmetallic pins ( 5 ) that are configured to transmit rotational force of the stack ( 2 ) to the shaft ( 142 ) via the first collar ( 6 ) and the second collar ( 8 ).

12 . The turbocharger ( 100 ) of claim 11 , wherein the pins ( 5 ) extend through the stack ( 2 ) of magnetic laminated plates ( 3 ) such that respective ends ( 5 a, 5 b ) of the pins ( 5 ) are connected to each of the first collar ( 6 ) and the second collar ( 8 );
the pins ( 5 ) are parallel to the shaft ( 2 ); and the first collar ( 6 ) is not in contact with the stack ( 2 ) of magnetic laminated plates ( 3 ), and the second collar ( 8 ) is in contact with the stack of magnetic laminated plates ( 3 ).

13 . The turbocharger ( 100 ) according to claim 11 further comprising a spring washer ( 7 ) placed between the first collar ( 6 ) and the stack of magnetic laminated plates ( 3 ).

14 . The turbocharger ( 100 ) according to claim 11 , wherein the pins ( 5 ) are arranged symmetrically about a rotational axis (R) of the shaft ( 142 ).

15 . The turbocharger ( 100 ) according to claim 11 , wherein the first collar ( 6 ) and the second collar ( 8 ) are fixed relative to the shaft ( 142 ).

16 . The turbocharger ( 100 ) according to claim 11 , wherein the respective ends ( 5 a, 5 b ) of the pins ( 5 ) are tightly fitted within openings ( 9 ) in each of the first collar ( 6 ) and the second collar ( 8 ).

Assignees

• Borgwarner Inc

Inventors

• Cavagnaro Augustine
• Chekansky Jason W
• Race Robert T

Classifications

• H02K1/30

  using intermediate parts, e.g. spiders · CPC title

• F01D15/10

  Adaptations for driving, or combinations with, electric generators · CPC title

• F04D25/06 Primary

  the pump being electrically driven (F04D25/08 takes precedence) · CPC title

• F05D2220/40

  in turbochargers · CPC title

• F02C6/12

  Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure · CPC title