한국전기전자재료학회:학술대회논문집 (Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference)
- 한국전기전자재료학회 2007년도 추계학술대회 논문집
- /
- Pages.261-261
- /
- 2007
적층형 압전 소자를 이용한 미소 에너지발생장치
Small Energy Generator Using Multilayer Piezoelectric Devices
-
Jeong, Soon-Jong
(Korea Electrotechnology Research Institute) ;
-
Kim, Min-Soo
(Korea Electrotechnology Research Institute) ;
-
Kim, In-Sung
(Korea Electrotechnology Research Institute) ;
-
Song, Jae-Sung
(Korea Electrotechnology Research Institute)
- 발행 : 2007.11.01
초록
Wearable and ubiquitous micro systems will be greatly growing and their related devices should be self-powered in order to avoid the replacement of finite power sources, for example, by scavenging energy from the environment. With ever reducing power requirements of both analog and digital circuits, power scavenging approaches are becoming increasingly realistic. One approach is to drive an electromechanical converter from ambient motion or vibration. Vibration-driven generators based on electromagnetic, electrostatic and piezoelectric technologies have been demonstrated. Among various generator types proposed so far, piezoelectric generator possesses considerable potential in micro system. To overcome low mechanical-to- electric energy conversion, the piezoelectric device should activate in resonance mode in response to external vibration. Normally, the external vibration excretes at low frequency ranging 0.1 to 200 Hz, whereas the resonant frequencies of the devices are fixed as constant. Therefore, keeping their resonant mode in varying external vibration can be one of important points in enhancing the conversion efficiency. We investigated the possibility of use of multi-bender type piezoelectric devices. To match the external vibration frequency with the device resonant frequency, the various devices with different resonant frequency were chosen. Under an external vibration acceleration of 0.1G at 120 Hz, the device exhibited a peak-to-peak voltage of 2.8 V and a power of 0.5 mw in resonance mode.
키워드