This thesis presents a topology for the wideband piezoelectric energy harvester from low speed wind flow and integrated power processing circuits including converters and controllers for maximum power point tracking (MPPT). The proposed wind energy harvester is useful for powering of wireless sensor nodes in smart monitoring and internet of things (IoT) applications. The suggested topology uses a single piezoelectric beam and achieves the wideband feature via the design of exerted force on the beam. An optimization method is also proposed to design the harvester with respect to the wind speed distribution model for capturing maximum available wind energy. In power processing circuit, a control method based on the voltage feedback is proposed to reduce the power losses of the circuit for maximum power point tracking. The suggested control method can be used for different interface circuits including full bridge (FB), voltage doubler (VD) and synchronized switch harvesting on inductor (SSHI) and its tracking performance is independent of piezoelectric beam parameters as well as the frequency and amplitude of the vibrating piezoelectric beam. The thesis also presents a technique to implement a high voltage integrated interface in CMOS technology with lower nominal voltage which eliminates the need for high voltage integrated process in developing the energy harvester interfaces. Key Words: Windband piezoelectric wind energy harvester, Integrated power processing circuit, Low wind speed, Maximum power transfer, Self-power wireless nodes, Internet of Things (IoT).
