Batteryless DCM Boost Converter for Kinetic Energy Harvesting Applications

In this paper, a bidirectional boost converter operated
in Discontinuous Conduction Mode (DCM) is presented as a suitable
power conditioning circuit for tuning of kinetic energy harvesters
without the need of a battery. A nonlinear control scheme, composed
by two linear controllers, is used to control the average value of
the input current, enabling the synthesization of complex loads. The
converter, along with the control system, is validated through SPICE
simulations using the LTspice tool. The converter model and the
controller transfer functions are derived. From the simulation results,
it was found that the input current distortion increases with the
introduced phase shift and that, such distortion, is almost entirely
present at the zero-crossing point of the input voltage.




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