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

Claim 0:
1. A control method of an electric machine comprising the following steps:
a first step of detecting an angular position of a rotor of the electric machine;
a second step, simultaneous with the first step, of detecting values of alternate current next to at least two phases of an input current to the electric machine electrically connected to an inverter;
a third step, simultaneous with the first step and the second step, of detecting values of voltage and direct current supplied as input to the inverter by electric supply means;
a fourth step of estimating an estimated torque supplied by the electric machine performed by processing data detected by position sensors, and the values of alternate current in the first step and in the second step, and data obtained by means of simulations of the electric machine;
a fifth step of computing a check torque supplied by the electric machine performed by using the following formula:, T
   
    c
    ⁢
    h
    ⁢
    e
    ⁢
    c
    ⁢
    k
   
  
  =
  
   
    
     P
     
      D
      ⁢
      C
     
    
    ·
    n
   
   ω
  
 

wherein ω is the speed of the rotor of the electric machine computed in a first sub-step starting from the angular position of the rotor of the electric machine detected by the position sensor, PDC is the value of the power supplied to the electric machine by the electric supply means, and n is the efficiency of the electric machine; and

a sixth step of comparing the value of the check torque computed in the fifth step and the value of the estimated torque estimated in the fourth step.