Piezoelectric energy harvesting and ultra-low-power management circuits for medical devices

Almarri, Noora; Chang, Jinke; Song, Wenhui; Jiang, Dai; Demosthenous, Andreas

doi:10.1016/j.nanoen.2024.110196

Nano Energy

2024

DOI: 10.1016/j.nanoen.2024.110196

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Piezoelectric energy harvesting and ultra-low-power management circuits for medical devices

Noora Almarri,

Jinke Chang,

Wenhui Song

et al.

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Cited by 2 publications

References 136 publications

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Piezoelectric Energy Harvesting: From Fundamentals to Advanced Applications

Bhatnagar,

Yadav,

Kumar

et al. 2024

Energy Tech

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Piezoelectric energy harvesting (PEH) has surfaced as an innovative technology for supplying power to low‐power electronic devices by converting mechanical energy into electrical energy. This technology utilizes the piezoelectric effect, in which specific materials produce an electric charge when they experience mechanical stress. Piezoelectric materials can be categorized into three main types: single crystal, composite, and polymeric. Single‐crystal materials exhibit elevated piezoelectric coefficients and stability; however, they tend to be costly and fragile. Composite materials integrate piezoelectric ceramics with polymer matrices, enhancing flexibility and lowering costs. Polymeric materials exhibit lightweight, flexible, and biocompatibility characteristics, rendering them ideal for wearable and implantable applications. Although PEH presents considerable promise, it is essential to tackle challenges, including low power output, material constraints, and environmental influences. Future investigations will focus on creating innovative materials that exhibit improved piezoelectric characteristics, refining device architecture for optimal energy conversion, and incorporating piezoelectric harvesting technology into intelligent systems. By addressing these challenges and investigating creative solutions, PEH can significantly advance sustainable and self‐powered electronic devices.

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Piezoelectric Energy Harvesting: From Fundamentals to Advanced Applications

Bhatnagar,

Yadav,

Kumar

et al. 2024

Energy Tech

View full text Add to dashboard Cite

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Research on operating characteristics of V-shaped ultrasonic motor based on improved electromechanical coupling model

Jin,

Yao,

et al. 2024

Smart Mater. Struct.

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As a complex electromechanical coupling system, evaluating the motion characteristics of an ultrasonic motor via an accurate theoretical model is challenging due to the strong coupling between its electrical and mechanical properties. To address this issue, the paper first establishes a complete dynamic model of the V-shaped ultrasonic motor (VUSM). In contrast to the traditional dynamic model, the proposed model incorporates the centroid vibration of the stator and applies the weighted residual method to reduce the computational complexity by simplifying the dynamic model from infinite-dimensional degrees of freedom to two degrees of freedom. Subsequently, the finite element method is employed to determine the vibration mode of the stator structure and derive the two-phase operational mode of the motor. Using these two-phase working modes, the model is then solved to predict the motor's output characteristics under any operational condition. Furthermore, an electrical model accounting for preload nonlinearity was developed based on the dynamic model and compared with the model without considering preload nonlinearity, supported by experimental verification. The findings demonstrate that the established dynamic model and electrical model can accurately simulate the changing laws of the input and output characteristics of the motor, which provides assistance for the subsequent operation status evaluation of the motor and fault diagnosis during operation.

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Piezoelectric energy harvesting and ultra-low-power management circuits for medical devices

Cited by 2 publications

References 136 publications

Piezoelectric Energy Harvesting: From Fundamentals to Advanced Applications

Piezoelectric Energy Harvesting: From Fundamentals to Advanced Applications

Research on operating characteristics of V-shaped ultrasonic motor based on improved electromechanical coupling model

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