A study of electromagnetic vibration energy harvesters with different interface circuits

Wang, Xu; Liang, Xinlan; Wei, Haiqiao

doi:10.1016/j.ymssp.2014.10.004

Cited by 22 publications

(22 citation statements)

References 46 publications

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“…Dimensionless harvested voltage and power ratios for the nonlinear oscillator as shown in Equations (17) and (18) are comparable to those for the linear electromagnetic and piezoelectric [66][67][68]. For the nonlinear oscillator, in addition to the dimensionless control variables of R N and α N , the mechanical damping ratio ξ and dimensionless relative displacement of the oscillator M are also control variables of the dimensionless harvested voltage and power ratios, which is different from that of the linear oscillator.…”

Section: Dimensionless Analysis Of the Nonlinear Cylindrical Tube Elementioning

confidence: 79%

A Dimensionless Parameter Analysis of a Cylindrical Tube Electromagnetic Vibration Energy Harvester and Its Oscillator Nonlinearity Effect

et al. 2018

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This paper investigates a single degree of freedom oscillator in a cylindrical tube vibration energy harvester which is applicable in a low-frequency range. A duffing-type nonlinear dynamic differential equation of the oscillator was developed for the nonlinear analysis and solved by using the harmonic balance method in order to widen energy harvesting frequency bandwidth. The exploitation of nonlinear spring force interactions of the oscillator to enhance the generator's performance is also presented in this paper. The dimensionless harvested power formula of the nonlinear mass-spring-damper system was derived, and a parameter study was conducted for the design optimization of the harvester. The main contribution of this paper is to establish a dimensionless performance analysis method of a nonlinear electromagnetic vibration energy harvester system and to disclose the effects of the parameters and nonlinearity of the system on the harvesting performance.

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Section: Dimensionless Analysis Of the Nonlinear Cylindrical Tube Elementioning

confidence: 79%

A Dimensionless Parameter Analysis of a Cylindrical Tube Electromagnetic Vibration Energy Harvester and Its Oscillator Nonlinearity Effect

et al. 2018

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“…For a linear regenerative suspension system, its natural resonant frequencies can be targeted to maximize power output and the harvesting efficiency. According to Wang, Liang [121], given the input excitation frequency, the power input and output can be calculated to give system energy harvesting efficiency. With the sinusoidal road displacement excitation input, the voltage output appears to be sinusoidal, which can be rectified into DC voltage.…”

Section: Sinusoidal Displacement Excitation Inputmentioning

confidence: 99%

“…Our group has started the research work of the electromagnetic vibration energy harvesters since 2014 [140]. The time domain and frequency analysis approaches have been applied to solve the system equations [121,140,141]. The performance of electromagnetic vibration energy harvesters have been analyzed and optimized in dimensionless forms and compared with that of the piezoelectric vibration energy harvesters for different interface circuits [140,[142][143][144].…”

Section: Our Contributionsmentioning

confidence: 99%

A Comprehensive Review of the Techniques on Regenerative Shock Absorber Systems

2018

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In this paper, the current technologies of the regenerative shock absorber systems have been categorized and evaluated. Three drive modes of the regenerative shock absorber systems, namely the direct drive mode, the indirect drive mode and hybrid drive mode are reviewed for their readiness to be implemented. The damping performances of the three different modes are listed and compared. Electrical circuit and control algorithms have also been evaluated to maximize the power output and to deliver the premium ride comfort and handling performance. Different types of parameterized road excitations have been applied to vehicle suspension systems to investigate the performance of the regenerative shock absorbers. The potential of incorporating nonlinearity into the regenerative shock absorber design analysis is discussed. The research gaps for the comparison of the different drive modes and the nonlinearity analysis of the regenerative shock absorbers are identified and, the corresponding research questions have been proposed for future work.

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“…Wang et al. 16 discussed power management system for an electromagnetic device and evaluated efficiency for different load circuits. Dimensionless analysis indicates that the electromagnetic device can operate with maximum efficiency of 50%.…”

Section: Introductionmentioning

confidence: 99%

“…Further, use of an accumulator between the damper cylinder and hydraulic motor ensured lesser frequency fluctuations in the harvested electric power. Wang et al 16 discussed power management system for an electromagnetic device and evaluated efficiency for different load circuits. Dimensionless analysis indicates that the electromagnetic device can operate with maximum efficiency of 50%.…”

Section: Introductionmentioning

confidence: 99%

Hybrid electromagnetic shock absorber for energy harvesting in a vehicle suspension

Satpute¹,

Satpute²,

Jugulkar

2016

Proceedings of the Institution of Mechanical Engineers, Part C:

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Electromagnetic harvesters need to be designed with a mechanism to amplify the coil relative velocity to ensure compact size and lower weight. This paper discusses a novel technique to use fluid link for velocity amplification in an electromagnetic shock absorber. Incorporation of the fluid amplification significantly improves harvested power, without affecting the system dynamics. Numerical modelling and experimentation of a prototype shock absorber comprising of high energy rare earth magnets have been presented. Peak coil voltage of 0.60–24.2 V was recorded during experimentation on the prototype. Experimental and simulation results validate that incorporation of the fluid amplification link improves the harvested electric power by 9702%. Comprehensive design procedure for better harvesting efficiency and vibration isolation has been discussed. Lastly incorporation of the shock absorber in McPherson strut suspension is illustrated. The real size version will be able to harvest peak power of 18–227 W for the suspension velocities of 0.15–0.4 m/s.

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A study of electromagnetic vibration energy harvesters with different interface circuits

Cited by 22 publications

References 46 publications

A Dimensionless Parameter Analysis of a Cylindrical Tube Electromagnetic Vibration Energy Harvester and Its Oscillator Nonlinearity Effect

A Dimensionless Parameter Analysis of a Cylindrical Tube Electromagnetic Vibration Energy Harvester and Its Oscillator Nonlinearity Effect

A Comprehensive Review of the Techniques on Regenerative Shock Absorber Systems

Hybrid electromagnetic shock absorber for energy harvesting in a vehicle suspension

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