TY - JOUR
T1 - Unified Models for Coupled Inductors Applied to Multiphase PWM Converters
AU - Chen, Minjie
AU - Sullivan, Charles
N1 - Funding Information:
Manuscript received December 6, 2020; revised April 12, 2021; accepted May 28, 2021. Date of publication June 9, 2021; date of current version August 16, 2021. This work was supported in part by the National Science Foundation under CAREER Award No. 1847365 and in part by the Princeton SEAS Innovation Fund. Recommended for publication by Associate Editor M. Duffy. (Corresponding author: Minjie Chen).
Publisher Copyright:
© 1986-2012 IEEE.
PY - 2021/12
Y1 - 2021/12
N2 - Circuit models for multiphase coupled inductors are summarized, compared, and unified. Multiwinding magnetic structures are classified into parallel-coupled structures and series-coupled structures. For parallel-coupled structures used for multiphase inductors, the relationships between: 1) inductance-matrix models, 2) extended cantilever models, 3) magnetic-circuit models, 4) multiwinding transformer models, 5) gyrator-capacitor models, and 6) inductance-dual models are examined and discussed. These models represent identical physical relationships in the multiphase coupled inductors, but emphasize different physical aspects and offer distinct design insights. The circuit duality between the series-coupled structure and the parallel-coupled structure is explored. Design equations for interleaved multiphase buck converters based on these models are streamlined and summarized, and a simplified equation showing the relationships between current ripple with and without coupling is presented. The models and design equations are verified through theoretical derivation, SPICE simulation, and experimental measurements.
AB - Circuit models for multiphase coupled inductors are summarized, compared, and unified. Multiwinding magnetic structures are classified into parallel-coupled structures and series-coupled structures. For parallel-coupled structures used for multiphase inductors, the relationships between: 1) inductance-matrix models, 2) extended cantilever models, 3) magnetic-circuit models, 4) multiwinding transformer models, 5) gyrator-capacitor models, and 6) inductance-dual models are examined and discussed. These models represent identical physical relationships in the multiphase coupled inductors, but emphasize different physical aspects and offer distinct design insights. The circuit duality between the series-coupled structure and the parallel-coupled structure is explored. Design equations for interleaved multiphase buck converters based on these models are streamlined and summarized, and a simplified equation showing the relationships between current ripple with and without coupling is presented. The models and design equations are verified through theoretical derivation, SPICE simulation, and experimental measurements.
KW - Coupled inductor
KW - inductance-dual model
KW - interphase transformer
KW - lumped circuit model
KW - magnetic-circuit model
KW - multiphase buck converter
KW - multiwinding transformer
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U2 - 10.1109/TPEL.2021.3088083
DO - 10.1109/TPEL.2021.3088083
M3 - Article
AN - SCOPUS:85111013663
SN - 0885-8993
VL - 36
SP - 14155
EP - 14174
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 12
M1 - 9449968
ER -