TY - GEN
T1 - Bus-voltage ripple optimization method for automotive multiphase DC/DC-converters
AU - Reiter, Tomas
AU - Polenov, Dieter
AU - Pröbstle, Hartmut
AU - Herzog, Hans Georg
PY - 2009
Y1 - 2009
N2 - Phase interleaving is a well known technique to increase output power, power density, and efficiency of DC/DC-converters. If the n-phase converter is ideal (symmetrical), the first n-1 harmonics of the ripple are canceled in the bus-capacitors and the cut-off frequency of the EMI-filters can be increased. But tolerances of real components and control circuit can seriously limit this theoretical benefit. Tolerances of phase-shift, storage inductors and phase-current sensors are investigated to determine the causes of an unsymmetrical converter system. In order to ensure near ideal ripple cancellation despite high phase-current sensor tolerances, an approach using closed-loop control of the 1st harmonic is introduced and tested experimentally. This approach significantly improves the current balancing performance of an automotive two-phase converter.
AB - Phase interleaving is a well known technique to increase output power, power density, and efficiency of DC/DC-converters. If the n-phase converter is ideal (symmetrical), the first n-1 harmonics of the ripple are canceled in the bus-capacitors and the cut-off frequency of the EMI-filters can be increased. But tolerances of real components and control circuit can seriously limit this theoretical benefit. Tolerances of phase-shift, storage inductors and phase-current sensors are investigated to determine the causes of an unsymmetrical converter system. In order to ensure near ideal ripple cancellation despite high phase-current sensor tolerances, an approach using closed-loop control of the 1st harmonic is introduced and tested experimentally. This approach significantly improves the current balancing performance of an automotive two-phase converter.
KW - 1 harmonic
KW - Automotive
KW - DC/DC-converter
KW - Multiphase-converter
KW - Phase-current balancing
KW - Ripple
UR - http://www.scopus.com/inward/record.url?scp=72449147197&partnerID=8YFLogxK
U2 - 10.1109/ECCE.2009.5315979
DO - 10.1109/ECCE.2009.5315979
M3 - Conference contribution
AN - SCOPUS:72449147197
SN - 9781424428939
T3 - 2009 IEEE Energy Conversion Congress and Exposition, ECCE 2009
SP - 2854
EP - 2861
BT - 2009 IEEE Energy Conversion Congress and Exposition, ECCE 2009
T2 - 2009 IEEE Energy Conversion Congress and Exposition, ECCE 2009
Y2 - 20 September 2009 through 24 September 2009
ER -