Electric rotating machine for vehicle

Abstract

An electric rotating machine for a vehicle capable of reducing influence of leakage flux on a turning angle detector as much as possible and detecting a turning angle more accurately is provided. The electric rotating machine for a vehicle includes: a rotor core 12 that is fitted to a rotary shaft 7; a stator core 24 that is concentric with the rotor core 12 and disposed on the outside of the rotor core 12; and a resolver 31 acting as a turning angle detector that is disposed on one shaft end of the rotary shaft 7; in which the rotary shaft 7 itself is constituted to be magnetic flux interrupting means made of a non-magnetic material.

What is claimed is:  
     
         1 . An electric rotating machine for a vehicle comprising: a rotor core that is fitted to a rotary shaft; a stator core that is concentric with said rotor core and disposed on the outside of said rotor core; and a turning angle detector that is disposed at one shaft end of said rotary shaft; 
 wherein said rotary shaft itself is constituted to be magnetic flux interrupting means made of a non-magnetic material.    
     
     
         2 . An electric rotating machine for a vehicle comprising: a rotor core that is fitted to a rotary shaft; a stator core that is concentric with said rotor core and disposed on the outside of said rotor core; and a turning angle detector that is disposed at one shaft end of said rotary shaft; 
 wherein a portion extending from a mounting part on the rotor side to the shaft end and constituting the turning angle detector of said rotary shaft is constituted to be shaft-shaped magnetic flux interrupting means made of a non-magnetic material instead of the rotary shaft portion, and said magnetic flux interrupting means is integrally formed with the rotary shaft by press fitting or welding.    
     
     
         3 . An electric rotating machine for a vehicle comprising: a rotor core that is fitted to a rotary shaft; a stator core that is concentric with said rotor core and disposed on the outside of said rotor core; and a turning angle detector that is disposed at one shaft end of said rotary shaft; 
 wherein a part of a rotor side member constituting said turning angle detector is constituted to be magnetic flux interrupting means made of a non-magnetic material.    
     
     
         4 . The electric rotating machine for a vehicle according to  claim 1 , wherein a high-permeability magnetic bypass member is disposed between said rotor core and said turning angle detector.  
     
     
         5 . The electric rotating machine for a vehicle according to  claim 2 , wherein a high-permeability magnetic bypass member is disposed between said rotor core and said turning angle detector.  
     
     
         6 . The electric rotating machine for a vehicle according to  claim 3 , wherein a high-permeability magnetic bypass member is disposed between said rotor core and said turning angle detector.  
     
     
         7 . The electric rotating machine for a vehicle according to  claim 1 , wherein said turning angle detector is a resolver.  
     
     
         8 . The electric rotating machine for a vehicle according to  claim 2 , wherein said turning angle detector is a resolver.  
     
     
         9 . The electric rotating machine for a vehicle according to  claim 3 , wherein said turning angle detector is a resolver.