Patent ID: 11881796
Assignee: ROLLS-ROYCE PLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 5:
6. The method of claim 3, in which the estimate of the inductance (Ls) of the PMSM is determined according to the equations:, L
     s
    
    =
    
     
      
       L
       ˆ
      
      s
     
     +
     
      
       r
       
        1
        -
        r
       
      
      ·
      
       
        L
        ˆ
       
       s
      
     
    
   
     
  
  ⁢
  

  
   
    r
    =
    
     
      
       (
       
        
         i
         q
         *
        
        -
        
         i
         q
        
       
       )
      
      /
      Δ
     
     ⁢
     
      i
      q
      *
     
    
   
     
  
  ⁢
  

  
   
    Δ
    ⁢
    
     i
     q
     *
    
   
   =
   
    
     i
     q
     *
    
    -
    
     
      i
      q
      *
     
     ·
     
      z
      
       -
       1
      
     
    
   
  
 

wherein {circumflex over (L)}s is a previous estimate of the inductance of the PMSM and z is is the Laplace operator in discrete form.