Interface circuit analysis of wind-induced vibration power generation with piezoelectric bimorph

Abstract

Wind-induced vibration energy recovery has been widely used in wireless sensor nodes as well as portable electronic devices. Because of the high energy density, simple structure and easy system integration, it is particularly suitable for micro systems with independent power supply. A circuit equivalent model of piezoelectric bimorph was developed with the basic structure of piezoelectric energy recovery device. Standard, SECE, and SCEI interface circuit and their control process was simulated via LT-spice software. Both SECE and SCEI performed stable output power over a large load range, while the remaining three interface circuits are somewhat deficient in output power or stability. The control of SECE interface circuit is simpler than SCEI, and the SECE interface circuit is more suitable for wind-induced vibration power generation with piezoelectric bimorph.