TY - GEN
T1 - Voltage balancing method for the multilevel flying capacitor converter using phase-shifted PWM
AU - Ghias, Amer M.Y.M.
AU - Pou, Josep
AU - Ciobotaru, Mihai
AU - Agelidis, Vassilios G.
PY - 2012
Y1 - 2012
N2 - In flying capacitor (FC) converters, phase-shifted pulse-width modulation (PS-PWM) provides natural voltage balancing. However, for a practical application, a more robust balancing mechanism of maintaining the FC voltages at the desired values is required. This paper proposes a new closed-loop voltage balancing method for multilevel FC converters using PS-PWM. The proposed method balances the voltages of the FCs by modifying the duty cycle of each switch of the FC converter using a proportional (P) controller. The crossed effect between FC currents and duty cycles is considered and is used for FC voltage balancing. The Simulation results verify that the proposed voltage balancing method is very robust to different operating conditions, such as load transients and non-linear loads.
AB - In flying capacitor (FC) converters, phase-shifted pulse-width modulation (PS-PWM) provides natural voltage balancing. However, for a practical application, a more robust balancing mechanism of maintaining the FC voltages at the desired values is required. This paper proposes a new closed-loop voltage balancing method for multilevel FC converters using PS-PWM. The proposed method balances the voltages of the FCs by modifying the duty cycle of each switch of the FC converter using a proportional (P) controller. The crossed effect between FC currents and duty cycles is considered and is used for FC voltage balancing. The Simulation results verify that the proposed voltage balancing method is very robust to different operating conditions, such as load transients and non-linear loads.
KW - Capacitor voltage balancing
KW - Flying capacitor (FC) converter
KW - Multilevel converter
KW - Phase-shifted pulse width modulation (PS-PWM)
UR - http://www.scopus.com/inward/record.url?scp=84874480763&partnerID=8YFLogxK
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U2 - 10.1109/PECon.2012.6450221
DO - 10.1109/PECon.2012.6450221
M3 - Conference contribution
AN - SCOPUS:84874480763
SN - 9781467350198
T3 - PECon 2012 - 2012 IEEE International Conference on Power and Energy
SP - 274
EP - 279
BT - PECon 2012 - 2012 IEEE International Conference on Power and Energy
T2 - 2012 IEEE International Conference on Power and Energy, PECon 2012
Y2 - 2 December 2012 through 5 December 2012
ER -