Patent ID: 11863065
Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The method for controlling a power module according to claim 1, wherein the cells operating in the modulation mode further adopt a current closed-loop and voltage feedforward control, wherein a calculating formula of a feedforward voltage is as follows:, V
    ff
   
   =
   
    
     
      V
      g
     
     -
     
      
       sign
       ⁡
       (
       
        i
        g
       
       )
      
      ⁢
      
       
        ∑
         
       
       
        h
        =
        1
       
       
        m
        2
       
      
      ⁢
      
       V
       dch
      
     
    
    
     N
     -
     
      m
      1
     
     -
     
      m
      2
     
    
   
  
  ,
 

wherein Vg is a grid voltage, ig is a grid current, sign is a sign function, and Vdch represents an output voltage of the h-th cell in the non-controlled rectifying mode.