TY - GEN
T1 - Computation-Cost-Invariant Universal Space-Vector Pulse-width Modulation for Multilevel Inverters
AU - Chen, Fa
AU - Qiao, Wei
AU - Wang, Hongmei
AU - Qu, Liyan
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - This paper proposes a new universal space-vector pulse-width modulation (SVPWM) scheme with invariant computation cost for multilevel inverters. In the proposed SVPWM, the modulation triangle in Sector 1 is quickly identified in a 120 coordinate system transformed from the alpha-beta coordinate system. Then, the switching states and duty cycles of the three vertices of the modulation triangle are determined by simple computations. The switching states in the other five sectors are obtained according to their simple relationships with those in Sector 1. The proposed SVPWM is independent of the voltage level of the inverter and does not require any prestored lookup table or iterative operation. Therefore, neither the execution time, nor the memory usage of the proposed SVPWM increases as the inverter level increases. Moreover, the proposed SVPWM is universal and can be applied to any multilevel inverters with the PWM controls based on space vector diagrams. The proposed SVPWM is validated by hardware tests on a three-level, neutral-point-clamped inverter; its computation cost invariance is validated by implementations in a digital signal processor for three-phase inverters with voltage levels up to 201; and its superiority is demonstrated by a comprehensive comparison with existing SVPWM schemes.
AB - This paper proposes a new universal space-vector pulse-width modulation (SVPWM) scheme with invariant computation cost for multilevel inverters. In the proposed SVPWM, the modulation triangle in Sector 1 is quickly identified in a 120 coordinate system transformed from the alpha-beta coordinate system. Then, the switching states and duty cycles of the three vertices of the modulation triangle are determined by simple computations. The switching states in the other five sectors are obtained according to their simple relationships with those in Sector 1. The proposed SVPWM is independent of the voltage level of the inverter and does not require any prestored lookup table or iterative operation. Therefore, neither the execution time, nor the memory usage of the proposed SVPWM increases as the inverter level increases. Moreover, the proposed SVPWM is universal and can be applied to any multilevel inverters with the PWM controls based on space vector diagrams. The proposed SVPWM is validated by hardware tests on a three-level, neutral-point-clamped inverter; its computation cost invariance is validated by implementations in a digital signal processor for three-phase inverters with voltage levels up to 201; and its superiority is demonstrated by a comprehensive comparison with existing SVPWM schemes.
KW - Computation cost invariance
KW - coordinate transformation
KW - multilevel inverter
KW - space vector pulse-width modulation (SVPWM)
KW - universal PWM
UR - http://www.scopus.com/inward/record.url?scp=85123386830&partnerID=8YFLogxK
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U2 - 10.1109/ECCE47101.2021.9595923
DO - 10.1109/ECCE47101.2021.9595923
M3 - Conference contribution
AN - SCOPUS:85123386830
T3 - 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings
SP - 3460
EP - 3467
BT - 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 13th IEEE Energy Conversion Congress and Exposition, ECCE 2021
Y2 - 10 October 2021 through 14 October 2021
ER -