Switching interface circuits employed with piezoelectric energy harvesters can increase the electrical damping considerably over that achievable with passive rectifiers. We show that a piezoelectric harvester coupled to certain types of switching circuits becomes a Coulomb-damped resonant generator. This allows analysis of such harvester systems within a well-known framework and, subject to practical constraints, allows the optimal electrical damping to be achieved. In the piezoelectric pre-biasing technique, the Coulomb damping is set by a pre-bias voltage whose optimal value is derived as a function of piezoelectric harvester parameters. © 2012 American Institute of Physics.
CITATION STYLE
Miller, L. M., Mitcheson, P. D., Halvorsen, E., & Wright, P. K. (2012). Coulomb-damped resonant generators using piezoelectric transduction. Applied Physics Letters, 100(23). https://doi.org/10.1063/1.4726108
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