Piezoelectric energy harvester impedance matching using a piezoelectric transformer
- Authors
- Jabbar, Hamid; Jung, Hyun Jun; Chen, Nan; Cho, Dae Heung; Sung, Tae Hyun
- Issue Date
- Sep-2017
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Piezoelectric; Energy harvesting; Piezoelectric transformer; Impedance matching; Harvesting circuit
- Citation
- SENSORS AND ACTUATORS A-PHYSICAL, v.264, pp.141 - 150
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS A-PHYSICAL
- Volume
- 264
- Start Page
- 141
- End Page
- 150
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/151708
- DOI
- 10.1016/j.sna.2017.07.036
- ISSN
- 0924-4247
- Abstract
- To harvest maximum power from a piezoelectric energy harvester requires conjugate impedance matching, consisting of both resistive and inductive load. In practical circuits, dc-dc converters working in discontinuous conduction mode are used for emulated resistive impedance matching. These converters contain a large and expensive electromagnetic component to reduce the wire conduction losses. A new approach toward piezoelectric energy harvester resistive impedance matching is presented by using a step-down piezoelectric transformer with a bi-directional inductor-less half-bridge circuit working under zero voltage switching conditions. The large and expensive magnetic transformer and inductor in previous works are replaced with a ceramic component with no electromagnetic interference. The presented technique can reduce the circuit size and the ceramic transformer can be manufactured on the harvester cantilever.
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