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

Claim 0:
1. A method for positioning a magnetic device comprising:
providing an impulse ring forming a coder and at least 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
    ⁢
    
      
    
    ⁢
    
      (
      
        360
        
          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.