Method and apparatus for a resilient rotor core assembly

Abstract

A rotor mount assembly, located between a rotor shaft and a plurality of magnetic elements, resiliently damps vibrations induced from the plurality of magnetic elements. The rotor mount assembly includes a first resilient ring, a second resilient ring, and a laminated spacer. The laminated spacer includes laminates from a stator core center punch. Both resilient rings include an inner metal insert which, in one embodiment, comprises laminates.

1 . a method of constructing a rotor mount assembly to facilitate damping vibration of a rotor shaft, said method comprising the steps of: 
 coupling a first resilient ring on the rotor shaft;    coupling a second resilient ring on the rotor shaft;    attaching a laminated spacer to the first resilient ring and the second resilient ring; and    attaching a plurality of magnetic elements to the spacer.    
     
     
         2 . A method according to  claim 1  wherein said step of attaching a laminated spacer comprises the step of interlocking the laminated spacer to the first resilient ring and the second resilient ring.  
     
     
         3 . A method according to  claim 1  wherein said step of attaching a laminated spacer comprises the step of press fitting the spacer circumferentially onto the first resilient ring and the second resilient ring.  
     
     
         4 . A method according to  claim 1  wherein said step of attaching a plurality of magnetic elements comprises the step of attaching a plurality of arc magnets to the spacer.  
     
     
         5 . A method according to  claim 1  wherein said step of attaching a laminated spacer further comprises the step of: 
 punching a plurality of ring laminations from a plurality of stator laminate elements; and  
 interlocking the plurality of ring laminations to form a substantially cylindrical hollow spacer.  
 
     
     
         6 . A rotor mount assembly configured to damp vibrations at a rotor shaft of an electric motor having a plurality of magnetic elements, said assembly comprising: 
 a first resilient ring;    a second resilient ring; and    a laminated spacer, said rotor mount assembly positioned between said rotor shaft and said plurality of magnetic elements.    
     
     
         7 . A rotor mount assembly according to  claim 6  wherein said spacer circumferentially encloses said first resilient ring and said second resilient ring.  
     
     
         8 . A rotor mount assembly according to  claim 7  wherein each said resilient ring includes an inner metal insert and a resilient insert.  
     
     
         9 . A rotor mount assembly according to  claim 8  wherein each said inner metal insert includes a periphery including a plurality of scallops.  
     
     
         10 . A rotor mount assembly according to  claim 8  wherein each said inner metal insert comprises laminations.  
     
     
         11 . A rotor mount assembly according to  claim 6  wherein said plurality of magnetic elements comprises arc magnets.  
     
     
         12 . A rotor mount assembly according to  claim 11  wherein said spacer receives said arc magnets.  
     
     
         13 . A rotor mount assembly according to  claim 6  wherein each said resilient ring includes an inner metal insert, a resilient insert and an outer annular ring.  
     
     
         14 . A rotor mount assembly according to  claim 13  wherein said outer annular ring comprises laminations.  
     
     
         15 . A rotor mount assembly according to  claim 13  wherein said outer annular ring interlocks with said spacer.  
     
     
         16 . A motor comprising: 
 a motor housing comprising a pair of end shields and a shell, said end shields connected to said shell and at least one of said end shields comprising an opening, said shell comprising an opening;    a stator assembly positioned within said motor housing and comprising a stator core and a stator bore extending therethrough, said stator core comprising a plurality of stator windings; and    a rotor assembly positioned within said stator bore, said rotor assembly comprising a rotor mounting assembly, a plurality of magnetic elements attached to said rotor mounting assembly, and a rotor shaft extending through said rotor mounting assembly, said end shield opening, and said shell opening, said rotor mount assembly comprising a first resilient ring, a second resilient ring and a laminated spacer, said rotor mount assembly positioned between said rotor shaft and said plurality of magnetic elements and configured to damp vibrations induced from said plurality of magnetic elements.    
     
     
         17 . A motor according to  claim 16  wherein said spacer circumferentially encloses said first resilient ring and said second resilient ring.  
     
     
         18 . A motor according to  claim 17  wherein each said resilient ring includes an inner metal insert and a resilient insert.  
     
     
         19 . A motor according to  claim 18  wherein said inner metal insert includes a periphery including a plurality of scallops.  
     
     
         20 . A motor according to  claim 18  wherein said inner metal insert comprises laminations.  
     
     
         21 . A motor according to  claim 16  wherein said spacer receives said plurality of magnetic elements.  
     
     
         22 . A motor according to  claim 16  wherein each said resilient ring includes an inner metal insert, a resilient insert and an outer annular ring.  
     
     
         23 . A motor according to  claim 22  wherein said outer annular ring comprises laminations.  
     
     
         24 . A motor according to  claim 23  wherein said outer annular ring interlocks with said spacer.