Improved quadratic boost converter using switching coupled-inductor and voltage-doubler

ABSTRACT

A novel high voltage gain non-isolated boost converter based on the normal quadratic boost converter topology is introduced. In the referenced circuit, a powerful charging capacitor can power the switched inductor. In the proposed topology, this inductor is improved using a coupled-inductor. The primary part of the coupled-inductor takes the place of the switched inductor and the secondary part is laid in the output side. A voltage-doubler is combined with the secondary part to increase the voltage gain and reduce oscillations during operations. The main advantage of this topology is that it has a high voltage gain and it can be controlled by both the duty cycle of the switch and the turns ratio of the coupled-inductor. The voltage stress on the switch and capacitors is relatively low, while the efficiency is high, over 90%, which is quite necessary in practical situations. This converter is designed to operate in the continuous-current mode and the boundary condition mode is also analysed. Mathematical derivations of operations and power losses and software-based simulation results can provide main features of this topology. Hardware test results can demonstrate the potential utility in both industrial and domestic areas.

KEYWORDS:

• Quadratic boost converter
• coupled-inductor
• voltage-doubler
• single switch
• high voltage gain

Additional information

Notes on contributors

Yiyang Li

Yiyang Li received the B.Eng. degree in Food science and technology (Sugar technology) from South China University of Technology, Guangzhou, China in 2014. He then received the Master of Professional Engineering degree in electrical engineering from the University of Sydney, Sydney, Australia in 2016. Then he has been engaged in Mphil. degree in the University of Sydney in 2017 and upgraded to be a Ph.D. student in 2018. Now he is working toward the Ph.D. degree in electrical engineering in the School of EIE, the University of Sydney, Australia.His research interests include developing DC-DC boost converter topologies and their applications, renewable energy resources, power converters for solar power applications and the control of DC-AC applications.

Swamidoss Sathiakumar

S. Sathiakumar received the B.E., M.E., and Ph.D. degrees in electrical engineering from the Indian Institute of Science, Bangalore, India.His industrial experience includes graduate apprentice training for a period of one year, followed by employment, from 1978 to 1981, as Assistant Development engineer at the English Electric Company of India Ltd. He then worked as a Project Assistant/Research Associate at the Indian Institute of Science on a project sponsored by the Electronics Commission of India to develop medium- power inverters for different indigenous applications. He then served as a Lecturer at the University of Newcastle, Australia till 1991. During his limited tenure in the University, he worked on adaptive control of rotating machines and published a number of papers in international journals and conferences. Currently, he is a Senior Lecturer at the University of Sydney, Sydney, Australia. His fields of interest are adaptive control of electric machines, application of microprocessors and power converters for real-time control, harmonic pollutionless PWM switching techniques for power conversion, renewable energy resources, power converters for solar power applications and smart grid technologies.

John Long Soon

John Long Soon received the M.Sc and PhD Degrees in electrical engineering from The University of Sydney, Sydney, NSW, in 2014 and 2019, respectively.In 2010, he joined the Mitsuho Electronics SDN BHD as a R&D electrical engineer where he was responsible for software/hardware development design including LED ballast, motor drive applications, switch mode power supply and transceiver wireless modules. He was a school of EIE faculty member with The University of Sydney in 2019 as a technical officer to support the laboratory course teaching and design the educational learning kits. His current research interest includes fault-tolerant converters, reliability of power electronics analysis and converter topologies.He was a recipient of the Best Paper Award in the category of Emerging Power Electronic Technique at the IEEE PEDS 2015 in Sydney conference.