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Modelling and estimation of leakage phenomena in magnetic circuits

TLDR
In this article, a new modeling method for magnetic circuits with any number of windings is presented, which incorporates adequate information about the correct distribution of leakage energy, the presence of gaps throughout the core, the arrangement of the windings, and the type of core used.
Abstract
A new modelling method for magnetic circuits is presented. The method can be used to model magnetic circuits with any number of windings. The models incorporate adequate information about the correct distribution of leakage energy, the presence of gaps throughout the core, the arrangement of the windings, and the type of core used. Several commonly used arrangements such as toroids with uniformly distributed turns, and bobbin core structures with multiple windings were modelled with the new technique. The measured electric circuit model values always compared favorably with the predicted physical values derived with the new method.

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   
    
  
  
   

     
        
      
    
     
      
       
       
     
     
      
     
      
      



      
     
      
      

      
   
  
      
     
     
      
       
      

      
        
       
     
       
      
       
     
    
    

      
      
      
       
     
      
    
   
     
     
     
    
        
      
    

    

     
       
       
       
    
     
     
    
  
      
    
    



    
         
      
     

   
      
     
       

     
      
    
     
     
     
      
   
       
       
    
     
       
       
 

    
      
         
    
     

      
     
     
    
     
        
       
      
   

  
 



     
     
     
     
        
      
        
       
   
    
 
     
      
     
      
       
      
     
     
      
       
     
     






       
       
        
      
    
        
   
       
      
      
 

   
      
 
        
      
      
     
        
      
        
      



 















 
 



 




   
    
 


 

    
   
     
    


 
    


    
      
          
     
     
        
     
 
    
    
    
      
        
     
       

     
    
     
    
     
       
     
       
      

 
  
   









      
      

    


         
       
        

      
       



      
    
        
     
        
 

  
      
 

  


        
      
          
 



 

   


     

        
 
t 


      
        
       
        
       
     




       
       
      
        
 


        
   


    
      
      
        
        
        
       
        
        
       
       
    
     
     
        
       
        
       
   
       
        

        
      
       
      
     
   






          
     
  




 



  















 
 












 
 





 
     
    
   
     


       

     
       
       
       
        
      
       
         
  
    
 
       
       
       
         
 

 
       
     
    
      

    


 
        
        
     
       
      
       
       
  

 



    


     
       
         
      
 











       
      
        
 

     
    


  
   


    
      
       
        
       
       
    
   
        
       
       
   
     
      
      
     
       
    
      
     
      
    
      
     
       
       
     



 


    
      
       

     
        
     
    
 




     
  
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Citations
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Journal ArticleDOI

A Novel ZVZCS Full-Bridge DC/DC Converter Used for Electric Vehicles

TL;DR: In this article, a ZVZCS full-bridge DC/DC converter is proposed to process and deliver power efficiently over very wide load variations, where the voltage across the output diode bridge is clamped to avoid any adverse voltage overshoots arising during turn-off of the output diodes as commonly found in regular full bridge converters.
Journal ArticleDOI

Air-gap reluctance and inductance calculations for magnetic circuits using a Schwarz-Christoffel transformation

TL;DR: In this paper, a method for calculating reluctance of air gaps in magnetic circuits making use of a Schwarz-Christoffel transformation is described, applied to the calculation of the inductance of example inductor and transformer configurations and its validity established through comparisons with calculations based on the finite element method of numerical analysis.
Proceedings ArticleDOI

A multiple-winding magnetics model having directly measurable parameters

TL;DR: In this paper, a general model of the multiple-winding transformer and coupled inductor is presented, in which all parameters can be directly measured, and it is shown that the model correctly predicts small-signal dynamics.
Proceedings ArticleDOI

Modelling and estimation of leakage phenomena in magnetic circuits

TL;DR: In this article, a new modeling method for magnetic circuits with any number of windings is presented, which incorporates adequate information about the correct distribution of leakage energy, the presence of gaps throughout the core, the arrangement of the windings, and the type of core used.
References
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Journal ArticleDOI

A new zero-ripple switching DC-to-DC converter and integrated magnetics

TL;DR: In this article, a new switching dc-to-dc converter is synthesized which consist of the least number of storage elements (inductive and capacitive) and switches, and yet truly emulates the ideally desired dc to dc transformer having both input and output currents as pure dc quantities with no ripple.
Proceedings ArticleDOI

Modelling and estimation of leakage phenomena in magnetic circuits

TL;DR: In this article, a new modeling method for magnetic circuits with any number of windings is presented, which incorporates adequate information about the correct distribution of leakage energy, the presence of gaps throughout the core, the arrangement of the windings, and the type of core used.
Proceedings ArticleDOI

Isolation and multiple output extensions of a new optimum topology switching DC-to-DC converter

TL;DR: In this paper, the authors extended the dc-todc converter to provide dc isolation and multiple outputs, and compared the sinle-transistor isolated forward and flyback converters operated under the same conditions.
DissertationDOI

Problems in analysis and design of switching regulators : I. Pole placement technique for DC-to-DC switching regulators. II. Transformer modelling. III. Cross-regulation of the two-output Cuk converter

Shi-Ping Hsu
TL;DR: In this paper, a simple [pi]-model is used to model two-winding, three-witching and under some special cases, fourwinding transformers, and the unique effect of unequal discharge of the coupling capacitances on the cross-regulation of a Cuk converter is first discussed.
DissertationDOI

Applications of Magnetics to Problems in Switched-Mode Power Conversion

TL;DR: In this article, the authors present a method for detecting impending saturation of magnetic materials. The technique exploits the interaction of perpendicular magnetic fields to provide a simple, direct and continuous measure of the increasing nonlinearity of the material without any elaborate unconventional devices or complex electronic circuitry.
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