論文ID: 20-00349
Vibration power generators that generate electricity using environmental vibrations are attracting attention as independent power sources for IoT sensors and the like. We are paying attention to the electromagnetic induction method, which can be composed of general-purpose and easily available materials and is less likely to cause aging deterioration of the members related to power generation. In the past, we reported that the effect of the magnetic parameters of the electromagnetic induction vibration generator on the generated power when the environmental vibration is a sine wave, and validated the model. We also discussed the design guidelines for improving the generated power when the angular frequency of environmental vibration matches the natural angular frequency. It is suggested that this guideline improves the frequency characteristics of generated power. On the other hand, there are many experimental reports in an actual vibration environment as an evaluation example of a vibration power generator, but it is difficult to make a general discussion because the frequency characteristics of environmental vibration differ depending on the application. In addition, although there are experimental reports and theoretical studies when the environmental vibration is white noise, there are no reports that experimentally verified the theory of average generated power for an electromagnetic induction type vibration power generator using a one-degree-of-freedom oscillator as far as we investigated. In the paper, we constructed a mathematical model for the time average of generated power against white noise vibration containing various frequency components and clarified the effect of magnetic parameters on generated power. Furthermore, the effectiveness of the model was verified by comparing the results of evaluating the power generation performance of the prototype using white noise as the excitation signal and the calculations.
