TY - GEN
T1 - Optimal Self-Tuning Control for Data-Centers' 48V-12V ZCS-STC
AU - Sovik, Guy
AU - Urkin, Tom
AU - Masandilov, Erez Erzol
AU - Mordechai Peretz, Mor
N1 - Publisher Copyright: © 2020 IEEE.
PY - 2020/3/1
Y1 - 2020/3/1
N2 - This paper presents a zero-current-switching (ZCS) control method with self-tuning capabilities employed on a 4-to-1 switched-tank converter (STC) for Google's and associated OCP standard data-centers. The control scheme ensures ZCS operation of each of the STC's resonant tanks individually, regardless of components mismatch, and adjusts the switching period upon variations of the components' values. The switching-state of the STC's resonators is evaluated at the turn-off instance by dedicated zero-current-detection indicator. Two approaches have been developed for the sensor's data acquisition, accounting for the inherent delay between the digital-controller gating command and the actual turn-off of the switches. The operation of the control has been validated experimentally on 650W 4-to-1 STC with PCB area of 5cmX2cmX0.6cm, demonstrating exceptional self-tuning capabilities over the entire load range and for various component mismatch scenarios. Peak efficiency of 98.6% is achieved at 200W.
AB - This paper presents a zero-current-switching (ZCS) control method with self-tuning capabilities employed on a 4-to-1 switched-tank converter (STC) for Google's and associated OCP standard data-centers. The control scheme ensures ZCS operation of each of the STC's resonant tanks individually, regardless of components mismatch, and adjusts the switching period upon variations of the components' values. The switching-state of the STC's resonators is evaluated at the turn-off instance by dedicated zero-current-detection indicator. Two approaches have been developed for the sensor's data acquisition, accounting for the inherent delay between the digital-controller gating command and the actual turn-off of the switches. The operation of the control has been validated experimentally on 650W 4-to-1 STC with PCB area of 5cmX2cmX0.6cm, demonstrating exceptional self-tuning capabilities over the entire load range and for various component mismatch scenarios. Peak efficiency of 98.6% is achieved at 200W.
KW - self-tuned control
KW - soft switching
KW - switched capacitor converter
KW - switched tank converter
KW - zero-current-switching (ZCS).
UR - http://www.scopus.com/inward/record.url?scp=85087789767&partnerID=8YFLogxK
U2 - https://doi.org/10.1109/APEC39645.2020.9124129
DO - https://doi.org/10.1109/APEC39645.2020.9124129
M3 - Conference contribution
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 455
EP - 462
BT - APEC 2020 - 35th Annual IEEE Applied Power Electronics Conference and Exposition
T2 - 35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020
Y2 - 15 March 2020 through 19 March 2020
ER -