Hybrid Solar-RF Energy Harvesting Systems for Electric Operated Wheelchairs

Electronics

AnhM. Le¹  HuyP. Nguyen¹  HoaT. Nguyen¹  MinhT. Nguyen¹  ToanV. Quyen¹  HaT. Nguyen²  VinhQ. Nguyen³  CuongV. Nguyen⁴  LongD. Nguyen⁴  Antonino Masaracchia⁵ 

[1] Department of Electrical Engineering, Thai Nguyen University of Technology, Thai Nguyen 24131, Vietnam;Department of Electronics Engineering, Thai Nguyen University, Thai Nguyen 24118, Vietnam;Department of Electronics and Radio Engineering, Academy of Military Science and Technology, Hanoi 122100, Vietnam;Institute of Research and Development, Duy Tan University, Danang 550000, Vietnam;School of Electronics, Electrical Engineering and Computer Science, Queen’s University Belfast, Belfast BT3 9DT, UK;

关键词: solar cells;    RF energy harvesting;    hybrid energy harvesting;    rechargeable batteries;    electric wheelchairs;   

DOI  :  10.3390/electronics9050752

来源: DOAJ

【 摘 要 】

Over the decades, with the advancement of science and technology, wheelchairs have undergone remarkable changes, such as controlling an electrical wheelchair by using brain signals. However, existing electrical wheelchairs still need improvements in terms of energy management. This paper proposes an hybrid Solar-Radio frequency (RF) harvesting system able to supply power for the continuous and effective operation of electrically powered wheelchairs. This system can simultaneously harvest power from RF and solar source that are both available in the surrounding environment. A maximum power point tracking (MPPT) and a boost converter are exclusively employed for the standalone solar system while the standalone RF system is equipped with a 9-stage voltage multiplier (VM). The voltage level for the charging process is obtained by adding the output voltage of each source. In addition, a current booster and a stabilizer are used to reach the required level of current and pin the charging voltage to a stable level, respectively. Simulation results show how the hybrid system is better and more stable when the boost current and stabilizer are used in the charging system. Moreover, we also provide some analytic results to prove the advantages of this system.

【 授权许可】

Unknown