title: Note: A cubic electromagnetic harvester that convert vibration energy from all directions.
abstract: We investigate the output performance of a cubic harvester which can scavenge low-frequency vibration energy from all directions. By adjusting the size and shape of the inside magnets, higher induced voltages and output power can be achieved. The optimal magnet is found to be cubic shape with the length of 6.35 mm (25.6% volume ratio), which can generate 4.27 mV root mean square voltage and 2.45 μW average power at the frequency of 28.86 Hz and acceleration of 1.17 g. The device is also demonstrated as a self-powered tilt sensor by measuring induced voltages at different tilt angles.
authors.affiliation: National Key Lab of Nano/Micro Fabrication Technology, Institute of Microelectronics, Peking University, Beijing 100871, China.
authors.forename: Mengdi
authors.initials: M
authors.lastname: Han
authors.affiliation: National Key Lab of Nano/Micro Fabrication Technology, Institute of Microelectronics, Peking University, Beijing 100871, China.
authors.forename: Guolin
authors.initials: G
authors.lastname: Qiu
authors.affiliation: National Key Lab of Nano/Micro Fabrication Technology, Institute of Microelectronics, Peking University, Beijing 100871, China.
authors.forename: Wen
authors.initials: W
authors.lastname: Liu
authors.affiliation: National Key Lab of Nano/Micro Fabrication Technology, Institute of Microelectronics, Peking University, Beijing 100871, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Meng
authors.affiliation: National Key Lab of Nano/Micro Fabrication Technology, Institute of Microelectronics, Peking University, Beijing 100871, China.
authors.forename: Xiao-Sheng
authors.initials: XS
authors.lastname: Zhang
authors.affiliation: National Key Lab of Nano/Micro Fabrication Technology, Institute of Microelectronics, Peking University, Beijing 100871, China.
authors.forename: Haixia
authors.initials: H
authors.lastname: Zhang