TY  - JOUR
VL  - 403-40
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-83255181982&doi=10.4028%2fwww.scientific.net%2fAMR.403-408.4231&partnerID=40&md5=94538d4d6054ac64594bc6ca59a09a6a
A1  - Ashraf, K.
A1  - Md Khir, M.H.
A1  - Dennis, J.O.
JF  - Advanced Materials Research
Y1  - 2012///
KW  - Absorbed energy; Ambient vibrations; Average power; Electrical domains; Electro-magnetic frequencies; Electromagnetic vibrations; Energy scavenging; Excitation frequency; Frequency up-conversion; High frequency oscillations; Low frequency oscillations; Low-frequency environment; Mechanical impacts; Peak power; Peak voltage; Power MEMS; Proof mass; Vibration energies
KW  -  Electromagnetic induction; Frequency converters; Magnetic flux; Magnets; Scavenging
KW  -  Energy harvesting
ID  - scholars3218
N2  - This paper presents an impact-based frequency increased electromagnetic vibration energy harvester to scavenge energy in a low frequency environment. To realize the novel impact based frequency up-conversion mechanism, a coil has been elastically anchored with a platform on which four permanent magnets are arranged in such a way that a strong closed magnetic flux path, linking the coil, is formed. The proposed scavenger has two dynamics of motion. The first phase is a low frequency oscillation to absorb energy from ambient vibration during which both the coil and magnet act as proof mass and move collectively. The increased proof mass ensures maximization of absorbed energy. After crossing a certain clearance, the platform containing magnetic setup rigidly and supporting the coil elastically, collides with a rigid stopper and bounces back. As a result of this mechanical impact a high frequency oscillation is setup in the coil relative to the magnets during which energy is transferred to electrical domain by electromagnetic induction. A macro-prototype has been build to prove the proposed concept. Initial test results show that the proposed harvester generates a peak voltage of 1 volt across a load of 220 Ω at an excitation frequency of 5 Hz which corresponds to a peak power of 4.5 mW and average power of 660 μW. © (2012) Trans Tech Publications, Switzerland.
CY  - Kuala Lumpur
EP  - 4234
SN  - 10226680
SP  - 4231
TI  - An electromagnetic frequency increased vibration energy harvester
N1  - cited By 1; Conference of 2011 7th International Conference on MEMS, NANO and Smart Systems, ICMENS 2011 ; Conference Date: 4 November 2011 Through 6 November 2011; Conference Code:87709
AV  - none
ER  -