TY - GEN
T1 - An improved modulation strategy for quasi-Z-source rectifier with minimum switching frequency and high efficiency
AU - Li, Xinying
AU - Zhang, Yan
AU - Huang, Yanfei
AU - Ding, Kaicheng
AU - Liu, Jinjun
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/4/18
Y1 - 2018/4/18
N2 - Quasi-Z-Source rectifier can achieve the traditional PWM rectifier's function, as well as implement buck and boost conversion of the input voltage. Due to the unique impedance source network, the shoot through (ST) state increases the reliability of rectifier impressively. As to three-phase Quasi-Z-source rectifier, many modulation strategies are proposed to achieve low output voltage and high efficiency. This paper proposes an improved modulation strategy that can minimize the voltage stress of switches and reduce the equivalent switching frequency of rectifier stage to about 1/3f (f is the frequency corresponding to the switching time period Ts). Minimum voltage conversion ratio is also obtained. During each sextant, only one phase leg operates at a high switching frequency to achieve ST interval control and output voltage regulation, while other two phase legs maintain the fixed switching states. Finally, the proposed modulation strategy is verified by simulation and experiment.
AB - Quasi-Z-Source rectifier can achieve the traditional PWM rectifier's function, as well as implement buck and boost conversion of the input voltage. Due to the unique impedance source network, the shoot through (ST) state increases the reliability of rectifier impressively. As to three-phase Quasi-Z-source rectifier, many modulation strategies are proposed to achieve low output voltage and high efficiency. This paper proposes an improved modulation strategy that can minimize the voltage stress of switches and reduce the equivalent switching frequency of rectifier stage to about 1/3f (f is the frequency corresponding to the switching time period Ts). Minimum voltage conversion ratio is also obtained. During each sextant, only one phase leg operates at a high switching frequency to achieve ST interval control and output voltage regulation, while other two phase legs maintain the fixed switching states. Finally, the proposed modulation strategy is verified by simulation and experiment.
KW - Minimum switching frequency
KW - Minimum voltage conversion ratio
KW - Pulse-width Modulation (PWM) strategy
KW - Quasi-Z-Source rectifier
UR - https://www.scopus.com/pages/publications/85046950116
U2 - 10.1109/APEC.2018.8341545
DO - 10.1109/APEC.2018.8341545
M3 - 会议稿件
AN - SCOPUS:85046950116
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 3114
EP - 3120
BT - APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018
Y2 - 4 March 2018 through 8 March 2018
ER -