Architecture-independent power bound for vibration energy harvesters

13th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Halvorsen, E.^1 ; Le, C.P.^1 ; Mitcheson, P.D.^2 ; Yeatman, E.M.^2

Department of Micro and Nano Systems Technology, Vestfold University College, Raveien 197, N-3184 Borre, Norway^1

Department of Electrical and Electronic Engineering, Imperial College, London SW7 2AZ, United Kingdom^2

关键词: Harmonic vibration;    Maximum output power;    Mechanical damping;    Mechanical degrees;    Mechanical input power;    Power electronic interface;    Theoretical bounds;    Vibration energy harvesters;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/476/1/012026/pdf
DOI  :  10.1088/1742-6596/476/1/012026

来源: IOP

【 摘 要 】

The maximum output power of energy harvesters driven by harmonic vibrations is well known for a range of specific harvester architectures. An architecture-independent bound based on the mechanical input-power also exists and gives a strict limit on achievable power with one mechanical degree of freedom, but is a least upper bound only for lossless devices. We report a new theoretical bound on the output power of vibration energy harvesters that includes parasitic, linear mechanical damping while still being architecture independent. This bound greatly improves the previous bound at moderate force amplitudes and is compared to the performance of established harvester architectures which are shown to agree with it in limiting cases. The bound is a hard limit on achievable power with one mechanical degree of freedom and can not be circumvented by transducer or power-electronic-interface design.