TY - GEN
T1 - Trade-Offs between Efficiency and Output Voltage of a Single Boost DC-DC Converter for Photo-Voltaic Low Power Harvesting Applications
AU - Rastmanesh, Maziar
AU - El-Masry, Ezz
AU - El-Sankary, Kamal
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/10
Y1 - 2019/10
N2 - Solar power harvesting is one of the most effective ways of providing clean energy. However, the power transfer is a major issue due to the shading effect. Besides; the photo voltaic (PV) output impedance is non-constant and it changes in a nonlinear fashion. This creates a challenge to ensure a maximum power transfer and hence, degrades the efficiency. A recent trend to regulate the efficiency has employed a boost DC- DC converter through adjusting its duty cycle. This paper presents an impedance matrix and analytical study on a single boost converter in continuous current mode (CCM) for low power harvesting application with its limitations to adapt PV's impedance change. It establishes the relationship between efficiency and output voltage by analyzing the dynamics between load, duty cycle, constantly changing impedance of the PV's cell and the impact of optimal duty cycle on the efficiency and output voltage as well. It further sheds some light into the over-sensitivity of efficiency with respect to duty cycle. To verify the analysis, an example simulation of 1.4V/17.1mW single boost converter for wearable electronics has been simulated and the result confirms the proposed model and analysis. Furthermore, the paper highlights the trade-off between the efficiency and its impact on the voltage regulation as well.
AB - Solar power harvesting is one of the most effective ways of providing clean energy. However, the power transfer is a major issue due to the shading effect. Besides; the photo voltaic (PV) output impedance is non-constant and it changes in a nonlinear fashion. This creates a challenge to ensure a maximum power transfer and hence, degrades the efficiency. A recent trend to regulate the efficiency has employed a boost DC- DC converter through adjusting its duty cycle. This paper presents an impedance matrix and analytical study on a single boost converter in continuous current mode (CCM) for low power harvesting application with its limitations to adapt PV's impedance change. It establishes the relationship between efficiency and output voltage by analyzing the dynamics between load, duty cycle, constantly changing impedance of the PV's cell and the impact of optimal duty cycle on the efficiency and output voltage as well. It further sheds some light into the over-sensitivity of efficiency with respect to duty cycle. To verify the analysis, an example simulation of 1.4V/17.1mW single boost converter for wearable electronics has been simulated and the result confirms the proposed model and analysis. Furthermore, the paper highlights the trade-off between the efficiency and its impact on the voltage regulation as well.
UR - http://www.scopus.com/inward/record.url?scp=85077963006&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85077963006&partnerID=8YFLogxK
U2 - 10.1109/IEMCON.2019.8936146
DO - 10.1109/IEMCON.2019.8936146
M3 - Conference contribution
AN - SCOPUS:85077963006
T3 - 2019 IEEE 10th Annual Information Technology, Electronics and Mobile Communication Conference, IEMCON 2019
SP - 839
EP - 842
BT - 2019 IEEE 10th Annual Information Technology, Electronics and Mobile Communication Conference, IEMCON 2019
A2 - Chakrabarti, Satyajit
A2 - Saha, Himadri Nath
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 10th IEEE Annual Information Technology, Electronics and Mobile Communication Conference, IEMCON 2019
Y2 - 17 October 2019 through 19 October 2019
ER -