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A Novel Space Vector Modulation Strategy for Three-Phase Quasi Switched Boost Inverter
Tan-Tai Tran,Minh-Khai Nguyen,Young-Cheol Lim,Joon-Ho Choi 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
The three phase quasi-switched boost inverter (qSBI) topology has one less LC pair than three phase Zsource/quasi-Z-source inverters. So, the qSBI is suitable for low-power applications. This paper presents a novel spacevector modulation (SVM) strategy for the three-phase qSBI topology to generate high-quality output waveforms with low THD of the output current and voltage. With introduced SVM strategy, according to sector number, the shootthrough phase is selected. Furthermore, the shoot-through state into the inverter’s switches and the switching-on state of an extra switch are controlled individually to boost the low input voltage up to a desired voltage level. Besides that, by using high modulation index, voltage stress across semiconductors and capacitor are significantly reduced. As a result, the inductor current ripple is reduced significantly. Simulation and experimental results of the qSBI with introduced SVM strategy are shown to verify the theoretical analysis.
Cascaded Single-Phase Boost Inverter Using High Frequency Transformer
( Van Thuan Tran ),( Tan Tai Tran ),( Minh Khai Nguyen ),( Hong Woo Lim ),( Won Bae Kim ) 조선대학교 공학기술연구원 2016 공학기술논문지 Vol.9 No.1
Quasi-switched boost inverter was investigated to replace Z-source inverter and switched-boost inverter in the field of low power applications because it uses one-LC-pair less than Z-source inverter. In this paper, we suggest the configuration of H-bridge quasi-switched boost inverter based on high frequency transformer (H-qSBI) to improve voltage gain factor. The proposed topology contains the same devices like switched boost inverter, where the active switch is replaced by an H-bridge inverter. This paper focuses on analyzing quasi-switched boost inverter (qSBI) implementation and simulating the performing results of cascaded single-phase dual-inverter using high frequency transformer by PSIM simulation software. The results are tested by an input DC voltage of 36 V to generate an AC voltage of 220Vrms/50Hz.
A Single-Phase Single-Stage Switched-Boost Inverter With Four Switches
Nguyen, Minh-Khai,Tran, Tan-Tai Institute of Electrical and Electronics Engineers 2018 IEEE transactions on power electronics Vol.33 No.8
<P>This paper proposes a new single-phase single-stage switched-boost inverter with four switches. Like the quasi-Z-source inverter and quasi-switched boost inverter (qSBI), the proposed inverter has the main features as continuous input current, buck/boost voltage with single-stage conversion, and shoot-through immunity. Compared to the qSBI, the proposed inverter uses one more capacitor and one less switch. This paper presents the operating principles, pulse-width modulation control strategy, parameter design guidelines, and simulation results for the proposed inverter. To verify the performance of the proposed inverter, an 800-W prototype was built with an 110 V/50 Hz output voltage in stand-alone and grid-connected modes. The simulation and experimental results matched those of the theoretical analysis.</P>
A Family of PWM Control Strategies for Single-Phase Quasi-Switched-Boost Inverter
Nguyen, Minh-Khai,Tran, Tan-Tai,Lim, Young-Cheol Institute of Electrical and Electronics Engineers 2019 IEEE transactions on power electronics Vol.34 No.2
<P>This paper proposed a novel family of pulsewidth modulation (PWM) strategies for single-phase quasi-switched boost inverter (qSBI). By combining shoot-through (ST) mode in the inverter's switches and the turning-<SMALL>on</SMALL> state of an additional switch, the qSBI produced a high voltage gain without adding any passive components. Compared to the conventional PWM strategy for the same input and output voltage gain, the introduced PWM strategies for qSBI could reduce voltage stress across semiconductors and capacitor with the following additional merits: having smaller high-frequency inductor current and capacitor voltage ripples, using high modulation index with low ST duty cycle, and having higher efficiency. Circuit analysis, operating theories, and simulation results of the single-phase qSBI with the introduced PWM5 strategy are shown. A 500-W laboratory prototype was constructed and the effectiveness of the introduced PWM strategy was validated. The qSBI with the proposed PWM strategies is suitable for applications where the required voltage gain lies between 2 and 3.</P>