Introduction to  Seminar Topic on Adaptive Piezoelectric Energy Harvesting Circuit :

The first thing that comes to our mind when we say electricity is the wires. Wires have led to many fatal accidents due to various factors and are considered unsafe. There is a need of a wireless electric source which provides all the functionality of a proper wired circuit. Piezo electricity can be generated from piezoelectric objects; it is basically materials such as ceramics, crystals, bones, proteins etc. These materials when subjected to mechanical force or stress, a charge get accumulated inside it. The one difference these type of generated power sources show is the capacitive nature rather than the inductive nature.

The thought of creating a harvesting circuit with this adaptive piezoelectric energy is a futuristic one. The device under fluctuating frequency and amplitude maximized power transfer almost four times than the normal charging sans a converter.

This device mainly aimed to increase the power transfer efficiency from such piezoelectric transducer to a battery which is electro chemical in nature, the whole process is done through an adaptive circuit. The other main goal is to achieve an optimum power transfer flow and also to maximize the storage of power in the battery. The whole result is analyzed and subjected to experimentation. 

The concept of an adaptive circuit has a major advantage as it is flexible than normal circuits. The rectifier’s output voltage can be tweaked accordingly in order to maximize the power transfer and in turn an increase of storage on energy inside the battery.

 A controller board is used to implement the adaptive controller, this board contains

  • Texas instruments (TMS320C31)
  • Digital Signal Processor (Floating Point)
  • Analog to Digital Converter
  • Pulse width modulator

The piezoelectric devices are subjected to constant change in amplitude and frequency in order to maximize the energy harvesting. One of the main applications of this system is embedding a RFID system and the piezoelectric device inside a shoe which contains an electronic system.

Download  ECE Seminar Topic on Adaptive Piezoelectric Energy Harvesting Circuit .