Patent ID: 11967907
Assignee: ZHEJIANG UNIVERSITY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The SVPWM method for the any level cascaded H-bridge inverter according to claim 1, wherein: in the step 4), the coordinates of the NTVs in the Cartesian coordinates are obtained according to the position of the reference vector according to the correspondence in the following table:, v1
v2
v3

AI

  (
  
    
      
        
          1
          2
        
        ⁢
        
          q
          α
        
      
      +
      1
    
    ,
    
      
        
          3
        
        2
      
      ⁢
      
        q
        β
      
    
  
  )

  (
  
    
      
        1
        2
      
      ⁢
      
        (
        
          
            q
            α
          
          +
          1
        
        )
      
    
    ,
    
      
        
          3
        
        2
      
      ⁢
      
        (
        
          
            q
            β
          
          +
          1
        
        )
      
    
  
  )

  (
  
    
      
        1
        2
      
      ⁢
      
        q
        α
      
    
    ,
    
      
        
          3
        
        2
      
      ⁢
      
        q
        β
      
    
  
  )

 

AII

  (
  
    
      
        1
        2
      
      ⁢
      
        (
        
          
            q
            α
          
          +
          1
        
        )
      
    
    ,
    
      
        
          3
        
        2
      
      ⁢
      
        (
        
          
            q
            β
          
          +
          1
        
        )
      
    
  
  )

  (
  
    
      
        1
        2
      
      ⁢
      
        (
        
          
            q
            α
          
          -
          1
        
        )
      
    
    ,
    
      
        
          3
        
        2
      
      ⁢
      
        (
        
          
            q
            β
          
          +
          1
        
        )
      
    
  
  )

  (
  
    
      
        1
        2
      
      ⁢
      
        q
        α
      
    
    ,
    
      
        
          3
        
        2
      
      ⁢
      
        q
        β
      
    
  
  )

 

BI

  (
  
    
      
        1
        2
      
      ⁢
      
        (
        
          
            q
            α
          
          +
          1
        
        )
      
    
    ,
    
      
        
          3
        
        2
      
      ⁢
      
        q
        β
      
    
  
  )

  (
  
    
      
        1
        2
      
      ⁢
      
        q
        α
      
    
    ,
    
      
        
          3
        
        2
      
      ⁢
      
        (
        
          
            q
            β
          
          +
          1
        
        )
      
    
  
  )

  (
  
    
      
        1
        2
      
      ⁢
      
        (
        
          
            q
            α
          
          -
          1
        
        )
      
    
    ,
    
      
        
          3
        
        2
      
      ⁢
      
        q
        β
      
    
  
  )

 

BII

  (
  
    
      
        1
        2
      
      ⁢
      
        (
        
          
            q
            α
          
          +
          2
        
        )
      
    
    ,
    
      
        
          3
        
        2
      
      ⁢
      
        (
        
          
            q
            β
          
          +
          1
        
        )
      
    
  
  )

  (
  
    
      
        1
        2
      
      ⁢
      
        q
        α
      
    
    ,
    
      
        
          3
        
        2
      
      ⁢
      
        (
        
          
            q
            β
          
          +
          1
        
        )
      
    
  
  )

  (
  
    
      
        1
        2
      
      ⁢
      
        (
        
          
            q
            α
          
          +
          1
        
        )
      
    
    ,
    
      
        
          3
        
        2
      
      ⁢
      
        q
        β
      
    
  
  )

where, v1, v2 and v3 represent the NTVs, qα is a quantization factor of the α-axis, and qβ is a quantization factor of the β-axis.