Hybrid Electromagnetic and Triboelectric Nanogenerators with Multi-Impact for Wideband Frequency Energy Harvesting

Abstract

Abstract:We present a hybrid electromagnetic generator (EMG) and triboelectric nanogenerator (TENG) using a multi-impact approach for broad-bandwidth-frequency (10-45 Hz) energy harvesting. The TENG and the EMG were located at the middle and the free end of the cantilever beam, respectively. When the system was subjected to an external vibration, the cantilever beam would be in a nonlinear response with multiple impacts from a low frequency oscillator. The mathematical model included a TENG oscillator which can have multiple impacts on the cantilever, and the nonlinear Lorenz force which comes from the motion of the coil in the electromagnetic field. Due to the strong nonlinearity of the impacts from the TENG oscillator and the limited space for the free tip of the cantilever, the dynamic response of the cantilever presented a much broader bandwidth, with a frequency range from 10-45 Hz. We also found that the average generated power from TENG and EMG can reach up to 30 µW/m 2 and 53 µW, respectively. Moreover, the dynamic responses of the hybrid EMG and TENG were carefully analyzed, and we found that the measured experimental results and the numerical simulations results were in good agreement.

Study of a Piezoelectric Energy Harvesting Floor Structure with Force Amplification Mechanism

“…Alternatively, kinetic energy is ubiquitous in our daily activities, thus harvesting kinetic energy from the ambient environment to provide sustainable power to these devices is highly desirable. Many kinetic energy harvesters have been developed using different conversion methods, including electromagnetic [4], triboelectric [5], electrostatic [6], and piezoelectric [7] conversions. Among these methods, piezoelectric convertors have attracted much attention due to the fact of their simple structure and high efficiency in energy conversion [8].…”

Development Trends and Perspectives of Future Sensors and MEMS/NEMS

“…The prototype generator had a measurement performance of 3.98 mW of effective electrical power. The other method for the broadband frequency energy harvesting was the constraint of the space resulting in a dramatically nonlinear in the system [140][141][142][143]. As shown in Figure 9b [143], the piezoelectric MEMS energy harvesters were mounted on the carrier which has limited downward space and can act as a stopper to widen the operational bandwidth for this energy harvester.…”

Energy Harvesting Technologies for Achieving Self-Powered Wireless Sensor Networks in Machine Condition Monitoring: A Review

“…Additionally, Guo et al [173] designed a waterproof generator based on triboelectric and electromagnetic mechanisms which can be applied in harsh environments. A hybrid triboelectric and electromagnetic generator fabricated by Zhu et al [174] can generate microlevel power density when it operates within a broad bandwidth (10-45 Hz). Similarly, for harvesting automobile rotational energy from the brake, Han et al [175] has explored a generator with a six blade structure which uses triboelectric and electrostatic induction under the disc contact during the braking action and non-contact modes, respectively.…”