Ambient Vibration Energy Converter Optimized Parameters Of The Power Conditioning Circuit

It is not convenient to change the battery or to power with wired supply for some kinds of electronic devices such as wireless sensors and portable equipments etc, the micro electrical power is needed. The micro electricity generator timelessly used is one of the micro powers being explored and developed, which can convert the ambient power to electricity. Ambient vibration energy is everywhere, so vibration power harvester becomes one of the hotspot research on self-power.For investigation and designment of magnet-electrical vibration transducer and the power conditioning circuits, this thesis converts the mechanism-electrical mix model to the circuit model with mechanism-electrical simulating, and uses the circuit simulation software to analysis theoretically and simulates the vibration power harvester without any exterior assistant power supply. The thesis fouses on the three aspects primarily: the modelling of vibration-electric energy convertor, power conditioning circuits and parameters optimization.Firstly, the configuration and principle of magnet-electrical transducer is analyzed. The system is predigested of a mass-spring-damp system, and analyzed from kinetics, and the power transfer function of the mechanism system is found, so that the output power expression of magnet-electrical transducer can be educed. With the help of electro-mechanical analogy and simulation, the physics model of mechanism system is conversed to the circuit model, so that the circuits can be analyzed with the simulation software.Secondly, power conditioning circuits of magnet-electrical transducer are designed, so that the electric energy can be storaged efficiently and power load, and satisfy the request of practical use. In the thesis two circuits to optimize the output power are designed, and the simulation results show the validity.Finally, the circuit simulation software OrCAD/Pspice9.2 is used to optimize the circuit parameters of the two power conditiong circuits, and the applicability of two circuits are analyzed on basis of the simulation results.