Study on Circuit Design of Energy Harvesting System

Title
Study on Circuit Design of Energy Harvesting System
Author
문재원
Alternative Author(s)
Moon, Jae Won
Advisor(s)
성태현
Issue Date
2014-08
Publisher
한양대학교
Degree
Master
Abstract
In recent years, many piezoelectric energy harvesting studies have been researching. However, output powers of these studies have scales from only microwatt to milli-watt. The milli-watt scale is unsuitable for various power sources, so we must improve output power of piezoelectric energy harvesting system for practical use. To enhance the output power of piezoelectric energy harvesting system up to the watt level, we designed a multi-piezoelectric array (MPA) energy harvesting system that can overcome the limitations of a single-piezoelectric harvesting systems. The MPA energy harvesting system was designed using an impact-type harvester utilizing a hitting stick, as such systems can generate higher output power than vibration-type methods using a cantilever in a single-piezoelectric energy harvesting system. We investigated the effects that various connection and rectification methods had on the output power of a piezoelectric energy harvesting system consisting of four 35 × 45 × 0.2 mm^3 piezoelectric modules. We found that the output power was highest when each module was rectified before the modules were connected in parallel and that the optimal load resistance was inversely proportional to the number of modules if they were connected in parallel. To obtain watt-level power from the proposed MPA energy harvesting system, we designed a system consisting of 102 piezoelectric modules based on the derived optimized experimental conditions, from which we were able to obtain an output power of 1.99 W at 1800 hpm (hits per minute) and 500 Ω.
URI
https://repository.hanyang.ac.kr/handle/20.500.11754/129798http://hanyang.dcollection.net/common/orgView/200000424802
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > ELECTRICAL ENGINEERING(전기공학과) > Theses (Master)
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