TY - JOUR
T1 - On the Practical Design of a Two-terminal Active Capacitor
AU - Wang, Haoran
AU - Liu, Yang
AU - Wang, Huai
PY - 2019/10
Y1 - 2019/10
N2 - A two-terminal active capacitor concept has been proposed recently based on an active power electronic circuit with a voltage control method and self-power scheme. It retains the convenience of use as a passive capacitor with two power terminals only without any additional required connections and has the potential to either increase power density or reduce design cost depending on the applications. Based on the previously proof-of-concept study, this paper addresses the design constraints, impedance modeling, and start-up solutions of two-terminal active capacitors. A design method for functionality, efficiency, lifetime, and cost-constraint applications is applied to size the active components and passive elements. A voltage feedforward control scheme is implemented to improve its dynamic response. Two start-up solutions are proposed to overcome the issues brought by the self-power scheme. A case study of an active capacitor for the dc link of a single-phase full-bridge rectifier is presented to demonstrate the theoretical analyses.
AB - A two-terminal active capacitor concept has been proposed recently based on an active power electronic circuit with a voltage control method and self-power scheme. It retains the convenience of use as a passive capacitor with two power terminals only without any additional required connections and has the potential to either increase power density or reduce design cost depending on the applications. Based on the previously proof-of-concept study, this paper addresses the design constraints, impedance modeling, and start-up solutions of two-terminal active capacitors. A design method for functionality, efficiency, lifetime, and cost-constraint applications is applied to size the active components and passive elements. A voltage feedforward control scheme is implemented to improve its dynamic response. Two start-up solutions are proposed to overcome the issues brought by the self-power scheme. A case study of an active capacitor for the dc link of a single-phase full-bridge rectifier is presented to demonstrate the theoretical analyses.
KW - Capacitors
KW - Power converter
KW - Active circuits
KW - Reliability
UR - http://www.scopus.com/inward/record.url?scp=85068665986&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2019.2893156
DO - 10.1109/TPEL.2019.2893156
M3 - Journal article
SN - 0885-8993
VL - 34
SP - 10006
EP - 10020
JO - I E E E Transactions on Power Electronics
JF - I E E E Transactions on Power Electronics
IS - 10
M1 - 8612976
ER -