Patent ID: 11948735
Assignee: TRAFAG AG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 7:
8. A method for producing a planar coil assembly (32) which has n planar coil units (10) arranged one on top of the other, wherein n is a natural number greater than 1, the method comprising:
(i) creating an i-th planar coil unit (10) by producing, with the aid of a computer, at least one planar coil (12) made of an electric conductor and having a planar coil thickness di,PS on an insulating material layer (14) made of electric insulating material having a layer thickness di,IM, for I equal to 1 to n;
(ii) arranging the planar coil units (10) in layers, with the interposition of the insulating material layer (14) between the planar coils (12), wherein the thicknesses dos and dom, are selected such that, 0
  ,
  
   6
   ≤
   
    
     D
     PS
    
    
     
      D
      IM
     
     +
     
      D
      PS
     
    
   
   ≤
   0
  
  ,
  9
  ,, applies, where, D
   
    P
    ⁢
    S
   
  
  =
  
   
    
     ∑
      
    
    
     i
     =
     1
    
    n
   
   ⁢
   
    d
    
     i
     ,
     
      P
      ⁢
      S, is the sum of the thicknesses di,PS of the planar coils and, D
   IM
  
  =
  
   
    
     ∑
      
    
    
     i
     =
     1
    
    n
   
   ⁢
   
    d
    
     i
     ,
     IM, is the sum of the thicknesses of the insulating material layers; and
(iii) forming at least one through-opening (26) through a center of superimposed planar coils (12) of the planar coil units (10), wherein the method further comprises at least one of following steps:
electrically connecting superimposed planar coils (12) by means of at least one through-connection (24) at the at least one through-opening (26);
inserting a flux concentrator into said at least one through-opening (26); or
performing step (iii) in such a way that the insulating material layers (14) are provided with the respective region of the through-opening (26).