Patent ID: 11899067
Assignee: SHANGHAI JIAO TONG UNIVERSITY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 16:
17. The current control method according to claim 11, wherein a method of eliminating the interference of the pulse voltage of the tested SM by compensating the feedforward voltage in the current controller comprises the following control procedures:, 
  
   {
   
    
     
      
       
        
         Δ
         ⁢
         
          i
          a
         
        
        =
        
         
          i
          a_ref
         
         -
         
          i
          a
         
                                                                      
        
       
      
     
     
      
       
        
         u
         a
        
        =
        
         Δ
         ⁢
         
          i
          a
         
         ×
         
          (
          
           
            K
            Pi
           
           +
           
            
             K
             Ii
            
            s
           
           +
           
            
             
              K
              
               ri
               ⁢
               1
              
             
             ⁢
             s
            
            
             
              s
              2
             
             +
             
              ω
              1
              2
             
            
           
           +
           
            
             
              K
              
               ri
               ⁢
               2
              
             
             ⁢
             s
            
            
             
              s
              2
             
             +
             
              ω
              2
              2
             
            
           
          
          )
         
        
       
      
     
     
      
       
        
         u
         m
        
        =
        
         
          u
          a
         
         +
         
          u
          
           D
           ⁢
           U
           ⁢
           T
          
          ′
         
                                                                      
        
       
      
     
    
    ,
   
  
 

wherein ia_ref is a reference value of the testing current, ia is the testing current generated by the current generator, Δia is a difference between a testing current reference value and the testing current, ua is the output of the PIR regulator, uDUT′ is the feedforward voltage for compensation, um is a modulation voltage of the current generator, ω1 is a first current frequency, ω2 is a second current frequency, KPi is a proportional coefficient of the current controller, KIi is an integral coefficient of the current controller, Kri1 and Kri2 are resonant coefficients of the current controller corresponding to the first current frequency and second current frequency, and s is a complex variable in a transfer function.