TY - GEN
T1 - Modeling and design of vertical multiphase coupled inductors with inductance dual model
AU - Elasser, Youssef
AU - Baek, Jaeil
AU - Sullivan, Charles R.
AU - Chen, Minjie
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/6/14
Y1 - 2021/6/14
N2 - This paper presents the modeling and design of multiphase coupled inductors with an inductance dual model. Existing models for multiwinding coupled magnetics are reviewed and compared. These models represent identical physical relationships, but reveal different fundamentals and offer distinct design insights. The inductance dual model is particularly suited to the design of high-density, low-loss coupled inductors for multiphase buck converters. A step-by-step procedure for designing coupled inductors based on the inductance dual model is introduced. This procedure is used to design a baseline coupled inductor for a multiphase buck converter. Starting from the baseline design, an optimal procedure is conducted targeting a revised design with improved performance and reduced size. The two designs are compared by experimental measurements. The optimal design procedure reduces the inductor height from 11.5 mm to 5.25 mm, reduces the core loss from 490 mW to 240 mW, and improves the output current slew rate from 1.04 A/ns to 2.08 A/ns.
AB - This paper presents the modeling and design of multiphase coupled inductors with an inductance dual model. Existing models for multiwinding coupled magnetics are reviewed and compared. These models represent identical physical relationships, but reveal different fundamentals and offer distinct design insights. The inductance dual model is particularly suited to the design of high-density, low-loss coupled inductors for multiphase buck converters. A step-by-step procedure for designing coupled inductors based on the inductance dual model is introduced. This procedure is used to design a baseline coupled inductor for a multiphase buck converter. Starting from the baseline design, an optimal procedure is conducted targeting a revised design with improved performance and reduced size. The two designs are compared by experimental measurements. The optimal design procedure reduces the inductor height from 11.5 mm to 5.25 mm, reduces the core loss from 490 mW to 240 mW, and improves the output current slew rate from 1.04 A/ns to 2.08 A/ns.
KW - Coupled inductor
KW - Inductance dual model
KW - Lumped circuit model
KW - Magnetic circuit model
KW - Multiphase buck converter
KW - Multiwinding transformer
UR - http://www.scopus.com/inward/record.url?scp=85115688704&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85115688704&partnerID=8YFLogxK
U2 - 10.1109/APEC42165.2021.9487344
DO - 10.1109/APEC42165.2021.9487344
M3 - Conference contribution
AN - SCOPUS:85115688704
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 1717
EP - 1724
BT - 2021 IEEE Applied Power Electronics Conference and Exposition, APEC 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 36th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2021
Y2 - 14 June 2021 through 17 June 2021
ER -