TY - JOUR
T1 - Voltage-Controlled Capacitor - Feasibility Demonstration in DC-DC Converters
AU - Zhang, Lujie
AU - Ritter, Andrew
AU - Nies, Craig
AU - Dwari, Suman
AU - Guo, Ben
AU - Priya, Shashank
AU - Burgos, Rolando
AU - Ngo, Khai
N1 - Funding Information:
This work was supported by the Defense Advanced Research Projects Agency under Grant 11874492.
Publisher Copyright:
© 2016 IEEE.
PY - 2017/8
Y1 - 2017/8
N2 - This letter presents a voltage-controlled capacitor that varies from 20% to 100% of the rated capacitance (1 μF) with a control voltage from half of the voltage rating to 0 V. Capacitance, self-resonant frequency, and equivalent series resistance were measured with respect to the control voltage. An equivalent circuit and a nonlinear model derived from relationship between permittivity and electric field were created and implemented in SPICE. A buck converter with input of 12 V, output of 5 V, and switching frequency of 500 kHz was built to demonstrate the change from 85% to 40% of the rated capacitance of the voltage-controlled capacitor. The error between the simulation and experiment was limited within 10%, which verifies the model.
AB - This letter presents a voltage-controlled capacitor that varies from 20% to 100% of the rated capacitance (1 μF) with a control voltage from half of the voltage rating to 0 V. Capacitance, self-resonant frequency, and equivalent series resistance were measured with respect to the control voltage. An equivalent circuit and a nonlinear model derived from relationship between permittivity and electric field were created and implemented in SPICE. A buck converter with input of 12 V, output of 5 V, and switching frequency of 500 kHz was built to demonstrate the change from 85% to 40% of the rated capacitance of the voltage-controlled capacitor. The error between the simulation and experiment was limited within 10%, which verifies the model.
UR - http://www.scopus.com/inward/record.url?scp=85017609576&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85017609576&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2017.2666478
DO - 10.1109/TPEL.2017.2666478
M3 - Article
AN - SCOPUS:85017609576
SN - 0885-8993
VL - 32
SP - 5889
EP - 5892
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 8
M1 - 7847426
ER -