Diode-Assisted Buck-Boost Voltage-Source Inverters

被引:56
作者
Gao, Feng [1 ]
Loh, Poh Chiang
Teodorescu, Remus [2 ]
Blaabjerg, Frede [2 ]
机构
[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Power Syst Lab, S-639798 Singapore, Singapore
[2] Univ Aalborg, Inst Energy Technol, DK-9220 Aalborg, Denmark
关键词
Buck-boost; dc-ac converters; emerging topologies;
D O I
10.1109/TPEL.2009.2020551
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper proposes a number of diode-assisted buck-boost voltage-source inverters with a unique X-shaped diode-capacitor network inserted between the inverter circuitry and dc source for producing a voltage gain that is comparatively higher than those of other buck-boost conversion techniques. Using the diode-assisted network, the proposed inverters can naturally configure themselves to perform capacitive charging in parallel and discharging in series to give a higher voltage multiplication factor without compromising waveform quality. In addition, by adopting different front-end circuitries, a number of diode-assisted inverter variants can be designed with each having its own operational principle and voltage gain expression. For controlling them, a generic modulation scheme that can be used for controlling all diode-assisted variants with minimized harmonic distortion and component stress is first designed, before proceeding on to design a second scheme with minimized commutation count for complement. All theoretical findings discussed in the paper were verified experimentally using a number of scale-down laboratory prototypes with relevant results presented in a later section for visual confirmation.
引用
收藏
页码:2057 / 2064
页数:8
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