TY - JOUR
T1 - Charging capacitors using single crystal PMN-PT and PZN-PT energy harvesters coupled with the SSHI circuit
AU - Yang, Zhengbao
AU - Qin, Zhaoye
AU - Zu, Jean
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/10/15
Y1 - 2017/10/15
N2 - Piezoelectric energy harvesting technology is regarded as a remedy to the short-life battery issue in low-power electronic devices, and has been extensively studied in the past two decades. Although a variety of new structures and mechanisms have been proposed for piezoelectric energy harvesters (PEHs), there is not much progress made on the piezoelectric materials that play a determinant role in PEHs performance. Most energy harvesters are still constructed with lead zirconate titanate (PZT). Recently, the new-generation piezoelectric materials PMN-PT and PZN-PT single crystals are proposed and start to be used in transducers. Their electromechanical coupling factor (k33) is over 90%, and the piezoelectric coefficient (d33) can reach three times of that of PZT. This study characterizes the PMN-PT and PZN-PT single crystals used in energy harvesters, compared with the polycrystalline PZT, in terms of charging capacitors. Systematic discussions are presented on the voltage, power and energy responses, as well as the reverse coupling effect on the mechanical response and the self-discharge effect of capacitors. Furthermore, a self-powered synchronized switch harvesting on inductor (SSHI) circuit is constructed and tested with the new single-crystal based energy harvesters. Experiments indicate that PMN-PT and PZN-PT can significantly boost the charging capability of energy harvesters, and that performance can be further enhanced by the SSHI circuit.
AB - Piezoelectric energy harvesting technology is regarded as a remedy to the short-life battery issue in low-power electronic devices, and has been extensively studied in the past two decades. Although a variety of new structures and mechanisms have been proposed for piezoelectric energy harvesters (PEHs), there is not much progress made on the piezoelectric materials that play a determinant role in PEHs performance. Most energy harvesters are still constructed with lead zirconate titanate (PZT). Recently, the new-generation piezoelectric materials PMN-PT and PZN-PT single crystals are proposed and start to be used in transducers. Their electromechanical coupling factor (k33) is over 90%, and the piezoelectric coefficient (d33) can reach three times of that of PZT. This study characterizes the PMN-PT and PZN-PT single crystals used in energy harvesters, compared with the polycrystalline PZT, in terms of charging capacitors. Systematic discussions are presented on the voltage, power and energy responses, as well as the reverse coupling effect on the mechanical response and the self-discharge effect of capacitors. Furthermore, a self-powered synchronized switch harvesting on inductor (SSHI) circuit is constructed and tested with the new single-crystal based energy harvesters. Experiments indicate that PMN-PT and PZN-PT can significantly boost the charging capability of energy harvesters, and that performance can be further enhanced by the SSHI circuit.
KW - Energy harvesting
KW - Energy storage
KW - Piezoelectric
KW - SSHI
KW - Single crystal
UR - http://www.scopus.com/inward/record.url?scp=85029547909&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85029547909&partnerID=8YFLogxK
U2 - 10.1016/j.sna.2017.09.024
DO - 10.1016/j.sna.2017.09.024
M3 - Article
AN - SCOPUS:85029547909
SN - 0924-4247
VL - 266
SP - 76
EP - 84
JO - Sensors and Actuators, A: Physical
JF - Sensors and Actuators, A: Physical
ER -