Patent ID: 11936324
Assignee: AKTIEBOLAGET SKF
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 6:
7. A method for positioning a magnetic device comprising:
providing an impulse ring forming a coder and exactly three magnetic detection cells forming a magnetic sensor, the impulse ring having a target comprising pairs of magnetic poles, and
positioning the magnetic detection cells around the target of the impulse ring according to a number of pairs of magnetic poles and according to the number of detection cells,
wherein when the number of pairs of magnetic poles is not equal to a multiple of the number of magnetic detection cells, the determination of the angular position of the detection cells further comprises the steps of:
determining a first remainder, the first remainder being equal to, 120
   ⁢
      
   modulo
   ⁢
      
   
    (
    
     
      3
      ⁢
      6
      ⁢
      0
     
     
      2
      ·
      
       N
       
        P
        ⁢
        P
        ⁢
        1
       
      
     
    
    )
   
  
  ,
 

Npp1 being the number of pairs of magnetic poles,
determining a second remainder, the second remainder being equal to, 240
   ⁢
      
   modulo
   ⁢
      
   
    (
    
     
      3
      ⁢
      6
      ⁢
      0
     
     
      2
      ·
      
       N
       
        P
        ⁢
        P
        ⁢
        1
       
      
     
    
    )
   
  
  ,
 

comparing the first remainder and the second remainder, and
determining the angular position of the magnetic detection cells according to the result of the comparison.