TY - GEN
T1 - Three-level H-bridge flying capacitor converter voltage balance dynamics analysis
AU - Ruderman, Alex
AU - Reznikov, Boris
PY - 2009/12/1
Y1 - 2009/12/1
N2 - Flying capacitor converter is an attractive choice due to its natural voltage balance property. Voltage balance dynamics analytical research methods reported to date are essentially based on a frequency domain analysis. They require high mathematical skills and the solutions are not truly analytical and difficult to use in an everyday practice. In this paper, a straightforward time domain approach based on stitching of consecutive switching intervals analytical solutions is applied to an H-bridge three-level flying capacitor converter. Small parameter analysis yields simple accurate expressions for voltage balance time constants revealing their dependences on load parameters, carrier frequency, and normalized voltage command. Voltage balance dynamics for AC PWM is obtained by averaging DC PWM exponential term decay factors on AC fundamental period.
AB - Flying capacitor converter is an attractive choice due to its natural voltage balance property. Voltage balance dynamics analytical research methods reported to date are essentially based on a frequency domain analysis. They require high mathematical skills and the solutions are not truly analytical and difficult to use in an everyday practice. In this paper, a straightforward time domain approach based on stitching of consecutive switching intervals analytical solutions is applied to an H-bridge three-level flying capacitor converter. Small parameter analysis yields simple accurate expressions for voltage balance time constants revealing their dependences on load parameters, carrier frequency, and normalized voltage command. Voltage balance dynamics for AC PWM is obtained by averaging DC PWM exponential term decay factors on AC fundamental period.
KW - Converter circuit
KW - High voltage power converters
KW - Modulation strategy
KW - Multilevel converters
KW - Pulse Width Modulation (PWM)
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M3 - Conference contribution
AN - SCOPUS:72949083821
SN - 9781424444328
T3 - 2009 13th European Conference on Power Electronics and Applications, EPE '09
BT - 2009 13th European Conference on Power Electronics and Applications, EPE '09
T2 - 2009 13th European Conference on Power Electronics and Applications, EPE '09
Y2 - 8 September 2009 through 10 September 2009
ER -