| Abstract |
Pyroelectric effect, a phenomenon that converts temperature variation into electricity, has been recently regarded as a promising solution in thermal energy harvesting due to its high thermal-to-electric efficiency and large power density. However, the current limitation lies in the lack of efficient systems that can both achieve the thermodynamic requirements and convert the harvested energy into useable electricity. Here, a power conditioning circuit specific to pyroelectric conversion cycles has been developed, which generates an 18-25 V triangle bias while extracting energy from an optimized cycle at 1 kHz. The proposed system is comprehensively analyzed, simulated, and validated experimentally on a pseudo pyroelectric material emulator. Both the circuit and a surrogate pyroelectric device are tested at 14 mW pyroelectric power with a harvesting efficiency of 24.3\%. |
