Second order approximation lumped parameter model for planar integrated L-L-C-T module [power conversion]

• Published in: Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344) Vol. 4; pp. 2419 - 2424 vol.4
• Main Authors: Rengang Chen, Strydom, J.T., van Wyk, J.D.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 2002
• Subjects: Equivalent circuits; Geometry; Integrated circuit technology; Power conversion; Power electronics; Power system analysis computing; Power system modeling; Resonant frequency; Solid modeling; Voltage
• ISBN: 0780374207; 9780780374201
• ISSN: 0197-2618
• DOI: 10.1109/IAS.2002.1042784

Planar integrated L-L-C-T (inductor-inductor-capacitor-transformer) technology has been the subject of intensive research over the last few years. Research of modeling and explaining its behavior in different power electronic circuits has been conducted. However, most of the previous models are based on first order approximation. High frequency characteristics of L-L-C-T cannot be modeled by those models. A second order approximation lumped parameter equivalent circuit of L-L-C-T is proposed in this paper. This model can describe the characteristics of L-L-C-T up to the third resonant frequency. The parameters of the model can be either extracted from small signal measurement or calculated from the L-L-C-T geometry structure. The proposed model is used to analyze the secondary voltage ringing of an asymmetrical half-bridge converter (AHBC) in distributed power system (DPS) applications. The predicted result matches the measurement result well.