Calculation of Parasitic Elements in Toroidal Core Transformers

This paper presents the design formulas for the calculation of the leakage inductance and stray capacitance of a toroidal core transformer. An analytical approach is utilized to calculate the leakage inductance and the turn-to-turn stray capacitance based on stored magnetic energy and electric energ...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2014-06, Vol.42 (6), p.1690-1696
Main Authors: Baktash, Amir, Vahedi, Abolfazl
Format: Article
Language:English
Subjects:
Capacitance
Computer simulation
Energy storage
Finite element analysis
Inductance
Leakage
Leakage inductance
Prototypes
skin effect
stray capacitance
Three dimensional imaging
toroidal core
Toroidal magnetic fields
Transformer cores
Transformers
Windings
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Summary:This paper presents the design formulas for the calculation of the leakage inductance and stray capacitance of a toroidal core transformer. An analytical approach is utilized to calculate the leakage inductance and the turn-to-turn stray capacitance based on stored magnetic energy and electric energy, respectively. In addition, the effect of frequency on the leakage inductance is studied and some modifications are applied to the calculation method to consider the skin effect. The obtained results are validated by 3-D finite element simulations. In addition, the measurements for a prototype transformer are presented as a comparison with the calculated and simulated results. The results show that the presented formulas for the toroidal core transformers have a good accuracy.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2014.2318757