TY - GEN
T1 - Extended T-type boost inverter for capacitance reduction
AU - Sugimoto, Tomoya
AU - Nozaki, Takahiro
AU - Murakami, Toshiyuki
N1 - Funding Information:
This research was supported in part by the Ministry of Education, Culture, Sports, Science and Technology of Japan under Grant-in-Aid for Encouragement of Young Scientists (A), 16H06079, 2016.
Publisher Copyright:
© 2020 IEEE.
PY - 2020/2
Y1 - 2020/2
N2 - In these days, multilevel inverters are focused thanks to their advantages, such as small voltage stress, low electromagnetic interferences, and harmonics reduction. Generally, renewable energy sources output a low DC voltage. From the viewpoint of efficiency, a single-stage conversion system which can directly change the lower DC-link voltage to higher AC voltage is required. Some single-stage conversion systems have been proposed before. However, these systems have large energy storage such as an inductor and a capacitor. This paper proposes a multilevel boost inverter stepping up the AC output peak voltage at any boost ratio by changing the number of switched capacitors. To reduce the capacitance, the proposed inverter has multiple conduction patterns when the output voltage is boosted. This characteristic distributes the discharging time to multiple capacitors. This inverter can set any maximum boost ratio and apply to the multiphase applications. The operation principle and the boost ability with multiple boost ratios were confirmed by simulations and experiments. The capacitance reduction was also confirmed by simulations.
AB - In these days, multilevel inverters are focused thanks to their advantages, such as small voltage stress, low electromagnetic interferences, and harmonics reduction. Generally, renewable energy sources output a low DC voltage. From the viewpoint of efficiency, a single-stage conversion system which can directly change the lower DC-link voltage to higher AC voltage is required. Some single-stage conversion systems have been proposed before. However, these systems have large energy storage such as an inductor and a capacitor. This paper proposes a multilevel boost inverter stepping up the AC output peak voltage at any boost ratio by changing the number of switched capacitors. To reduce the capacitance, the proposed inverter has multiple conduction patterns when the output voltage is boosted. This characteristic distributes the discharging time to multiple capacitors. This inverter can set any maximum boost ratio and apply to the multiphase applications. The operation principle and the boost ability with multiple boost ratios were confirmed by simulations and experiments. The capacitance reduction was also confirmed by simulations.
KW - Boost converter
KW - Multilevel inverter
KW - Pulse Width Modulation (PWM)
KW - Switched capacitor
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U2 - 10.1109/ICIT45562.2020.9067103
DO - 10.1109/ICIT45562.2020.9067103
M3 - Conference contribution
AN - SCOPUS:85084157664
T3 - Proceedings of the IEEE International Conference on Industrial Technology
SP - 474
EP - 479
BT - Proceedings - 2020 IEEE International Conference on Industrial Technology, ICIT 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 21st IEEE International Conference on Industrial Technology, ICIT 2020
Y2 - 26 February 2020 through 28 February 2020
ER -
