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Accurate Evaluation of Leakage Inductance in High Frequency Transformers Using an Improved Frequency-Dependent Expression

Mohammad Amin Bahmani (Institutionen för energi och miljö, Elteknik) ; Torbjörn Thiringer (Institutionen för energi och miljö, Elteknik)
IEEE transactions on power electronics (0885-8993). Vol. 30 (2015), 10, p. 5738-5745.
[Artikel, refereegranskad vetenskaplig]

Moving towards higher power density in magnetic components, which is often realized by increasing the operating frequency, leads to the need for development of more accurate design tools, for example more accurate expressions for core losses, winding losses and leakage inductance calculations. This paper presents a new analytical expression intended to accurately evaluate the leakage inductance of transformers in the high frequency range in which the behavior of the magnetic field within the windings is altered. Unlike conventional expressions, which usually overestimate the leakage inductance at higher frequencies, this expression accounts for high frequency behavior of the magnetic field and provides high accuracy when operating at high frequencies. These high accuracy and applicability makes the derived expression of interest for designers to avoid time consuming finite element simulations without compromising with accuracy. The expression is validated by 2-D FEM simulation, as well as by measurements.

Nyckelord: High frequency transformer, leakage inductance

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Denna post skapades 2014-11-22. Senast ändrad 2016-04-11.
CPL Pubid: 206303


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Institutioner (Chalmers)

Institutionen för energi och miljö, Elteknik



Chalmers infrastruktur