Patent ID: 11929693
Assignee: MAVEL EDT S.P.A.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The control method according to claim 3, wherein, if the electric machine is a synchronous motor with rotor permanent magnets, the fourth step further comprises a second sub-step of the fourth step, wherein the estimation of the torque supplied by the electric machine is performed by using a second formula, in a reference rotary system, T
   estimated
  
  =
  
   
    3
    2
   
   ·
   p
   ·
   
    i
    q
   
   ·
   
    (
    
     λ
     +
     
      
       (
       
        
         L
         d
        
        -
        
         L
         q
        
       
       )
      
      ·
      
       i
       d
      
     
    
    ), synchronous with the rotor, the second formula being:, T
   estimated
  
  =
  
   
    3
    2
   
   ·
   p
   ·
   
    i
    q
   
   ·
   
    (
    
     λ
     +
     
      
       (
       
        
         L
         d
        
        -
        
         L
         q
        
       
       )
      
      ·
      
       i
       d
      
     
    
    ), wherein p is a number of polar torques of the motor, id and iq are respectively the direct current and the quadrature current computed in the first sub-step of the fourth step, Ld is a direct inductance in which the direct current id passes, and Lq is a quadrature inductance in which the quadrature current iq passes, λ is a concatenated flow produced by the rotor permanent magnets and concatenated by stator windings.