Design and Power Output Characteristics of an EYE-type Piezoelectric Energy Harvester

Department of Electrical Engineering, Gyeongnam Provincial Namhae College, Namhae 52422, Korea(Received January 8, 2016; Revised January 18, 2016; Accepted January 24, 2016)Abstract: We present the results of a study of a piezoelectric generator that generates electricity by the application of tension to an element. A device is named “EYE-type generator”. The EYE-type generator consists of a rectangular ceramic and two elastic body plates that are attached to upper and lower surfaces of a ceramic. If tension is applied to both ends of the elastic body, that tension is transformed to pressure on the ceramic through a change in the form of the elastic body, causing a piezoelectric effect whereby electricity is generated by the ceramic. This generator is relatively durable because a forces are not applied directly to the ceramic. We examined dependencies of the generator’s output characteristics on the size of the ceramic and elastic body. A resonance and output characteristics were analyzed by using a finite element method. The generator was fabricated based on results of the analysis, and this was attached to a frequency-controllable vibrator to measure the output characteristics. The measured results were compared with results of the simulation, and the results pointed to the practicality of the design.Keywords: Energy harvester, Piezoelectric, EYE type, FEM #$%십 수 년 전부터 기존자원의 고갈로 인한 에너지난이 예상되어 왔다. 과학기술의 발달로 인한 전자기기의 보급으로 전력 수요량이 증가하였으며, 이에 자원 고갈이 가속화 되어 전기수요량에 대한 공급이 부족하여