TY - GEN
T1 - Steady-state analysis of dead-time effect on bidirectional buck converters
AU - Bidoggia, Benoit
AU - Maheshwari, Ram Krishan
AU - Nielsen, Rasmus Ørndrup
AU - Munk-Nielsen, Stig
AU - Blaabjerg, Frede
PY - 2012
Y1 - 2012
N2 - Half-bridge inverters, full-bridge inverters and bidirectional buck converters share a common topological structure, in which two switches and two diodes are present. In such a topology, a dead time between the two signals controlling the switches is inserted. This influences the relationship between output voltage, input voltage and duty cycle as a function of the output current. In the literature, the dead-time effect has been studied in relation with inverters, active filters, voltage regulated modules and high-precision power amplifiers, and dead-time compensation techniques have been proposed. However, the measurement of the current is normally required for all dead-time compensation strategies, which can be a problem when the current approaches or crosses zero. In this paper, the operation of a bidirectional buck converter in the region around zero current has been analytically analyzed. It has been shown that in a region around zero there is no dead-time effect. The analytical expression of the borders between the areas where the dead-time effect is positive, zero or negative has been given. Moreover it has been shown that between these three areas, there are four other transitional areas. The analytical analysis has been confirmed by simulation and experimental results.
AB - Half-bridge inverters, full-bridge inverters and bidirectional buck converters share a common topological structure, in which two switches and two diodes are present. In such a topology, a dead time between the two signals controlling the switches is inserted. This influences the relationship between output voltage, input voltage and duty cycle as a function of the output current. In the literature, the dead-time effect has been studied in relation with inverters, active filters, voltage regulated modules and high-precision power amplifiers, and dead-time compensation techniques have been proposed. However, the measurement of the current is normally required for all dead-time compensation strategies, which can be a problem when the current approaches or crosses zero. In this paper, the operation of a bidirectional buck converter in the region around zero current has been analytically analyzed. It has been shown that in a region around zero there is no dead-time effect. The analytical expression of the borders between the areas where the dead-time effect is positive, zero or negative has been given. Moreover it has been shown that between these three areas, there are four other transitional areas. The analytical analysis has been confirmed by simulation and experimental results.
UR - http://www.scopus.com/inward/record.url?scp=84872916962&partnerID=8YFLogxK
U2 - 10.1109/IECON.2012.6388650
DO - 10.1109/IECON.2012.6388650
M3 - Article in proceeding
SN - 978-1-4673-2419-9
T3 - Proceedings of the Annual Conference of the IEEE Industrial Electronics Society
SP - 792
EP - 797
BT - Proceedings of the IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society
PB - IEEE Press
T2 - the 38th Annual Conference of the IEEE Industrial Electronics Society, IECON 2012
Y2 - 25 October 2012 through 28 October 2012
ER -