Song, Hyun-Cheol Kumar, Prashant Sriramdas, Rammohan Lee, Hyeon Sharpes, Nathan Kang, Min-Gyu Maurya, Deepam Sanghadasa, Mohan Kang, Hyung-Won Ryu, Jungho Reynolds, William T., Jr. Priya, Shashank 2024-01-19T22:00:53Z 2024-01-19T22:00:53Z 2021-09-03 2018-09-01 0306-2619 https://pubs.kist.re.kr/handle/201004/120935 Broadband mechanical energy harvesting implies stable output power over a wide range of source frequency. Here we present a cost-effective solution towards achieving broadband response by designing a magnetically coupled piezoelectric energy harvester array that exhibits a large power density of 243 mu W/cm(3) g(2) at natural frequency and bandwidth of more than 30 Hz under 1 g acceleration. The magnetically coupled piezoelectric energy harvester array exhibits dual modes of energy harvesting, responding to both stray magnetic field as well as ambient vibrations, and is found to exhibit the output power density of 36.5 mu W/cm(3) Oe(2) at 79.5 Hz under the ambient magnetic field while maintaining the broadband nature. The magnetically coupled piezoelectric energy harvester array was demonstrated to harvest continuous power from a rotary pump vibration, an automobile engine vibration and a parasitic magnetic field surrounding a cable of an electric kettle. These demonstrations suggest that the magnetically coupled piezoelectric energy harvester array could serve the role of a standalone power source for wireless sensor nodes and small electronic devices. English ELSEVIER SCI LTD DESIGN GENERATOR Broadband dual phase energy harvester: Vibration and magnetic field Article 10.1016/j.apenergy.2018.04.054 1 APPLIED ENERGY, v.225, pp.1132 - 1142 APPLIED ENERGY 225 1132 1142 scie scopus 000438181000087 2-s2.0-85047765534 Energy & Fuels Engineering, Chemical Energy & Fuels Engineering Article DESIGN GENERATOR Piezoelectric energy harvesting Magnetic field energy harvesting Broadband resonance Dual phase Magnetic coupling