Mr. Qinlin Cai Profile

Qinlin Cai

at Hong Kong Polytechnic Univ

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Proceedings Article | 27 March 2019 Paper

Vibration-based energy harvesting circuit using feed-forward control

Qinlin Cai, Songye Zhu

Proceedings Volume 10970, 109700X (2019) https://doi.org/10.1117/12.2513791

KEYWORDS: Resistance, Energy harvesting, Electromagnetism, Vibration control, Energy efficiency, Microcontrollers, Inductance, Resistors, Energy conversion efficiency

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This paper proposes an improved electromagnetic damper cum energy harvester (EMDEH), consisting of an electromagnetic damper and a specially designed energy harvesting circuit (EHC). EMDEH is intended to suppress structural vibrations by harvesting vibration energy of structures. A microcontroller unit (MCU) is applied in the EHC to control the power switch by adjusting the duty cycle appropriately through a feed-forward control. Consequently, the EHC can achieve a controllable equivalent damping coefficient. The performance of the proposed EHC was validated through a cyclic test on a universal testing machine. Although the total energy conversion is relatively low, a desirable constant resistance feature could be achieved and an electrical power with hundreds of mWs could be charged into a battery. These experimental results revealed the benefit of using MCU in a feed-forward control system in EMDEH, and the improved EMDEH could fulfill dual-functions, namely, simultaneous vibration control and energy harvesting, with an improved performance.

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