A Novel Integrated Single-Phase Inverter With Auxiliary Step-Up Circuit for Low-Voltage Alternative Energy Source Applications

This paper presents a novel integrated single-phase inverter with both high step-up ratio and buck-boost capabilities for low-voltage alternative energy source applications. An auxiliary step-up circuit is integrated with an isolated Ćuk-derived voltage-source inverter to achieve a much higher volt...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2010-09, Vol.25 (9), p.2234-2241
Main Authors: PAN, Ching-Tsai, LAI, Ching-Ming, CHENG, Ming-Chieh
Format: Article
Language:English
Subjects:
Alternative energy sources
Applied sciences
Capacitors
Charging
Circuit properties
Circuits
Circuits of signal characteristics conditioning (including delay circuits)
Connection and protection apparatus
Convertors
Electric currents
Electric potential
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electrical machines
Electronic circuits
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Energy exchange
Exact sciences and technology
High step-up ratio
Integrated circuits
Inverters
Low voltage
low-voltage alternative energy sources
Performance analysis
Semiconductors
single-phase inverter
Steady-state
Stress
Switched capacitor circuits
Switches
Switching circuits
Switching converters
Voltage
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Summary:This paper presents a novel integrated single-phase inverter with both high step-up ratio and buck-boost capabilities for low-voltage alternative energy source applications. An auxiliary step-up circuit is integrated with an isolated Ćuk-derived voltage-source inverter to achieve a much higher voltage-conversion ratio while avoiding using extreme duty ratios in both dc-side and ac-side switches. In addition, the proposed circuit possesses the automatic energy-transfer characteristic between parallel charging and series discharging of two capacitors to achieve a much higher voltage level. Moreover, the voltage stress of dc-side active switches can be reduced to below one half as compared with that of a traditional isolated Ćuk converter. Finally, steady-state characteristics, performance analyses, and representative experimental results are also made to show the merits of the proposed inverter.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2010.2049123