The Experts below are selected from a list of 6072 Experts worldwide ranked by ideXlab platform

Ali Ghaffarinejad - One of the best experts on this subject based on the ideXlab platform.

  • a Conditioning Circuit with exponential enhancement of output energy for triboelectric nanogenerator
    Nano Energy, 2018
    Co-Authors: Dimitri Galayko, Armine Karami, Ali Ghaffarinejad, Javad Yavand Hasani, Ronan Hinchet, Yingxian Lu, Hemin Zhang, Philippe Basset
    Abstract:

    Abstract Triboelectric-electret nanogenerators (T-ENG) are characterized by their high output voltage and small current and therefore a relatively low output power, making them limited to small power consuming electronics. Here we report a self-enhancing Conditioning Circuit (CC) that exponentially amplifies the output electrical energy converted from the mechanical domain of a T-ENG, in orders of magnitude compared to traditional CC. The Circuit, working on the principles of Bennet’s doubler device, is inductorless and uses only diodes as automatic switches to reconfigure the charge storing capacitors between series and parallel modes. We previously reported this Circuit in saturation and stable mode for T-ENG and compared the performances with half-wave rectifier. Here we investigate the Circuit performance in exponential and unstable mode in comparison with half-wave and full-wave rectifiers. Theoretical analysis is presented to study the operation of the Circuit and to find out the required conditions for the Bennet’s doubler to work in exponential boosting mode. Output performance of half and full wave rectifiers are compared theoretically. Simulations and experiments are performed to verify the theoretical discussions and to present the effect of non-ideal Circuit elements on the output performance of the T-ENG.

Philippe Basset - One of the best experts on this subject based on the ideXlab platform.

  • Design of a MEMS Electrostatic Kinetic Energy Harvester and its Bennet Conditioning Circuit in Integrated Technologies
    2019 Symposium on Design Test Integration & Packaging of MEMS and MOEMS (DTIP), 2019
    Co-Authors: M. Ben A. Hassana, Philippe Basset, A. Bessaad, P. Carulli, S. Karmakar, H. Samaali, F. Najar, Dimitri Galayko
    Abstract:

    This abstract presents the design of a MEMS vibration energy harvester and its Conditioning Circuit intended to be fully fabricated using commercial integrated processes. The system includes an electrostatic transducer for the energy conversion and a Bennet's doubler Conditioning Circuit. The MEMS is designed in the technology (XMB10) and the integrated Circuit (IC) in the technology 350 nm High Voltage (XH035), both from XFab, using the new Coventor/Cadence environment. For design validation of the system, the complete layout of the system has been simulated, including the electromechanical device, the parasitic components of the IC and the bonding pads. We successfully generated an average power of 195 nW on an integrate storage capacitance of 1 nF under a voltage of 9 V for an external mechanical excitation of 3 g at 431 Hz.

  • a Conditioning Circuit with exponential enhancement of output energy for triboelectric nanogenerator
    Nano Energy, 2018
    Co-Authors: Dimitri Galayko, Armine Karami, Ali Ghaffarinejad, Javad Yavand Hasani, Ronan Hinchet, Yingxian Lu, Hemin Zhang, Philippe Basset
    Abstract:

    Abstract Triboelectric-electret nanogenerators (T-ENG) are characterized by their high output voltage and small current and therefore a relatively low output power, making them limited to small power consuming electronics. Here we report a self-enhancing Conditioning Circuit (CC) that exponentially amplifies the output electrical energy converted from the mechanical domain of a T-ENG, in orders of magnitude compared to traditional CC. The Circuit, working on the principles of Bennet’s doubler device, is inductorless and uses only diodes as automatic switches to reconfigure the charge storing capacitors between series and parallel modes. We previously reported this Circuit in saturation and stable mode for T-ENG and compared the performances with half-wave rectifier. Here we investigate the Circuit performance in exponential and unstable mode in comparison with half-wave and full-wave rectifiers. Theoretical analysis is presented to study the operation of the Circuit and to find out the required conditions for the Bennet’s doubler to work in exponential boosting mode. Output performance of half and full wave rectifiers are compared theoretically. Simulations and experiments are performed to verify the theoretical discussions and to present the effect of non-ideal Circuit elements on the output performance of the T-ENG.

  • electrostatic vibration energy harvester using an electret charged mems transducer with an unstable auto synchronous Conditioning Circuit
    The 15th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS 2015), 2015
    Co-Authors: Armine Karami, Philippe Basset, Dimitri Galayko
    Abstract:

    This paper reports for the first time experiments using an electrostatic vibration energy harvester comprised of a low voltage electret-charged MEMS transducer joined to an unstable autosynchronous Conditioning Circuit with rectangular charge-voltage characteristic, also known as the Bennet's doubler Conditioning Circuit. The experimental results show that the electret voltage, even if of low value, can be used as the necessary pre-charge for these type of electrostatic vibration energy harvesters. Also, the use of such a Conditioning Circuit with a low-voltage electret capacitive MEMS tranducer instead of the previously-reported Conditioning Circuits with direct connection to load or through a rectifier, can be advantageous in terms of maximal harvested power for a low-voltage electret, showing up to 95% higher converted power.

  • Design of controller IC for asynchronous Conditioning Circuit of an electrostatic vibration energy harvester
    Proceedings - 2012 IEEE Int. Conf. on Green Computing and Communications GreenCom 2012 Conf. on Internet of Things iThings 2012 and Conf. on Cyber Phy, 2012
    Co-Authors: Andrii Dudka, Dimitri Galayko, Philippe Basset
    Abstract:

    This paper presents a transistor-level design of a power management electrical Circuit for asynchronous electrostatic energy harvester. The Conditioning Circuit of the harvester is based on a charge pump and a fly back Circuits. The designed power management block implements the concept of adaptive behaviour of energy harvester, allowing it to operate in an optimal mode in environment where the magnitude of the vibrations may change in time. For the first time, such a system is designed to operate at high voltage (up to 30 V). However, this paper does not concern the design of electromechanical transducer. The IC design has been carried out in 0.35um high-voltage CMOS technology, and has been validated by a coupled VHDL-AMS/SPICE simulation. The control system average power consumption is less then 0.9uW, whereas the average harvested power is approximately 1.1uW for 14V operation voltage.

Dimitri Galayko - One of the best experts on this subject based on the ideXlab platform.

  • Design of a MEMS Electrostatic Kinetic Energy Harvester and its Bennet Conditioning Circuit in Integrated Technologies
    2019 Symposium on Design Test Integration & Packaging of MEMS and MOEMS (DTIP), 2019
    Co-Authors: M. Ben A. Hassana, Philippe Basset, A. Bessaad, P. Carulli, S. Karmakar, H. Samaali, F. Najar, Dimitri Galayko
    Abstract:

    This abstract presents the design of a MEMS vibration energy harvester and its Conditioning Circuit intended to be fully fabricated using commercial integrated processes. The system includes an electrostatic transducer for the energy conversion and a Bennet's doubler Conditioning Circuit. The MEMS is designed in the technology (XMB10) and the integrated Circuit (IC) in the technology 350 nm High Voltage (XH035), both from XFab, using the new Coventor/Cadence environment. For design validation of the system, the complete layout of the system has been simulated, including the electromechanical device, the parasitic components of the IC and the bonding pads. We successfully generated an average power of 195 nW on an integrate storage capacitance of 1 nF under a voltage of 9 V for an external mechanical excitation of 3 g at 431 Hz.

  • a Conditioning Circuit with exponential enhancement of output energy for triboelectric nanogenerator
    Nano Energy, 2018
    Co-Authors: Dimitri Galayko, Armine Karami, Ali Ghaffarinejad, Javad Yavand Hasani, Ronan Hinchet, Yingxian Lu, Hemin Zhang, Philippe Basset
    Abstract:

    Abstract Triboelectric-electret nanogenerators (T-ENG) are characterized by their high output voltage and small current and therefore a relatively low output power, making them limited to small power consuming electronics. Here we report a self-enhancing Conditioning Circuit (CC) that exponentially amplifies the output electrical energy converted from the mechanical domain of a T-ENG, in orders of magnitude compared to traditional CC. The Circuit, working on the principles of Bennet’s doubler device, is inductorless and uses only diodes as automatic switches to reconfigure the charge storing capacitors between series and parallel modes. We previously reported this Circuit in saturation and stable mode for T-ENG and compared the performances with half-wave rectifier. Here we investigate the Circuit performance in exponential and unstable mode in comparison with half-wave and full-wave rectifiers. Theoretical analysis is presented to study the operation of the Circuit and to find out the required conditions for the Bennet’s doubler to work in exponential boosting mode. Output performance of half and full wave rectifiers are compared theoretically. Simulations and experiments are performed to verify the theoretical discussions and to present the effect of non-ideal Circuit elements on the output performance of the T-ENG.

  • electrostatic vibration energy harvester using an electret charged mems transducer with an unstable auto synchronous Conditioning Circuit
    The 15th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS 2015), 2015
    Co-Authors: Armine Karami, Philippe Basset, Dimitri Galayko
    Abstract:

    This paper reports for the first time experiments using an electrostatic vibration energy harvester comprised of a low voltage electret-charged MEMS transducer joined to an unstable autosynchronous Conditioning Circuit with rectangular charge-voltage characteristic, also known as the Bennet's doubler Conditioning Circuit. The experimental results show that the electret voltage, even if of low value, can be used as the necessary pre-charge for these type of electrostatic vibration energy harvesters. Also, the use of such a Conditioning Circuit with a low-voltage electret capacitive MEMS tranducer instead of the previously-reported Conditioning Circuits with direct connection to load or through a rectifier, can be advantageous in terms of maximal harvested power for a low-voltage electret, showing up to 95% higher converted power.

  • Nonlinearities in electrostatic vibration energy harvesters: A review using the example of a charge pump Conditioning Circuit
    2014 IEEE International Symposium on Circuits and Systems (ISCAS), 2014
    Co-Authors: Elena Blokhina, Eoghan O'riordan, Orla Feely, Dimitri Galayko
    Abstract:

    In this paper, we overview the sources of nonlinearities and the methods of analysis for electrostatic (capacitive) vibration energy harvesters by the example of an energy harvester employing a charge pump base Conditioning Circuit. Electrostatic vibration energy harvesters are devices that contain mechanical resonators driven by ambient vibrations and coupled with Conditioning electronic Circuits through a capacitive transducer. These devices are characterised by internal and external nonlinearity and complexity and can display irregular behaviour. We give an overview of the capacitive conversion mechanisms and discuss the nonlinear techniques that can be employed for the analysis of nonlinear vibration energy harvesters.

  • Design of controller IC for asynchronous Conditioning Circuit of an electrostatic vibration energy harvester
    Proceedings - 2012 IEEE Int. Conf. on Green Computing and Communications GreenCom 2012 Conf. on Internet of Things iThings 2012 and Conf. on Cyber Phy, 2012
    Co-Authors: Andrii Dudka, Dimitri Galayko, Philippe Basset
    Abstract:

    This paper presents a transistor-level design of a power management electrical Circuit for asynchronous electrostatic energy harvester. The Conditioning Circuit of the harvester is based on a charge pump and a fly back Circuits. The designed power management block implements the concept of adaptive behaviour of energy harvester, allowing it to operate in an optimal mode in environment where the magnitude of the vibrations may change in time. For the first time, such a system is designed to operate at high voltage (up to 30 V). However, this paper does not concern the design of electromechanical transducer. The IC design has been carried out in 0.35um high-voltage CMOS technology, and has been validated by a coupled VHDL-AMS/SPICE simulation. The control system average power consumption is less then 0.9uW, whereas the average harvested power is approximately 1.1uW for 14V operation voltage.

Hua Yu - One of the best experts on this subject based on the ideXlab platform.

  • An Adaptable Interface Conditioning Circuit Based on Triboelectric Nanogenerators for Self-Powered Sensors
    Micromachines, 2018
    Co-Authors: Yongshan Hu, Shan Lu, Dongchen Yang, Xiaokun Zhang, Hua Yu
    Abstract:

    In order to solve the limited life problem of typical battery power supply, a self-powered method that is based on the environmental energy harvesting has emerged as an amazing power supply approach. The Tribo-electric-Nano-generator (TENG) has been widely studied because of its high efficiency, low fabrication cost, and high output voltage. However, low output power conversion efficiency has restricted its practical application because of its own extremely high output impedance. In order to match the high output impedance of TENG and increase the output power, this paper presents an adaptable interface Conditioning Circuit, which is composed of an impedance matching Circuit, a synchronous rectifier bridge, a control Circuit, and an energy storage device. In the impedance matching Circuit, the energy loss of coupling inductance could be reduced by using the bi-directional switch to increase the frequency, and impedance matching Circuit can be used to increase the output efficiency of TENG. Experimental results show that, in about 3.6 s, the storing capacitor voltage was basically stable at 5.5 V by using the proposed adapted interface Conditioning Circuit in this paper. The charging efficiency has increased by 50%.

  • A vibration-based MEMS piezoelectric energy harvester and power Conditioning Circuit
    Sensors (Switzerland), 2014
    Co-Authors: Hua Yu, Licheng Deng, Jielin Zhou, Zhiyu Wen
    Abstract:

    This paper presents a micro-electro-mechanical system (MEMS) piezoelectric power generator array for vibration energy harvesting. A complete design flow of the vibration-based energy harvester using the finite element method (FEM) is proposed. The modal analysis is selected to calculate the resonant frequency of the harvester, and harmonic analysis is performed to investigate the influence of the geometric parameters on the output voltage. Based on simulation results, a MEMS Pb(Zr,Ti)O3 (PZT) cantilever array with an integrated large Si proof mass is designed and fabricated to improve output voltage and power. Test results show that the fabricated generator, with five cantilever beams (with unit dimensions of about 3 × 2.4 × 0.05 mm3) and an individual integrated Si mass dimension of about 8 × 12.4 × 0.5 mm3, produces a output power of 66.75 μW, or a power density of 5.19 μW∙mm-3∙g-2 with an optimal resistive load of 220 kΩ from 5 m/s2 vibration acceleration at its resonant frequency of 234.5 Hz. In view of high internal impedance characteristic of the PZT generator, an efficient autonomous power Conditioning Circuit, with the function of impedance matching, energy storage and voltage regulation, is then presented, finding that the efficiency of the energy storage is greatly improved and up to 64.95%. The proposed self-supplied energy generator with power Conditioning Circuit could provide a very promising complete power supply solution for wireless sensor node loads.

E. Charry - One of the best experts on this subject based on the ideXlab platform.

  • A CMOS signal Conditioning Circuit for piezoresistive pressure sensors
    2002 IEEE International Symposium on Circuits and Systems. Proceedings (Cat. No.02CH37353), 2002
    Co-Authors: J. Ramirez, E. Charry
    Abstract:

    This work presents a signal Conditioning Circuit for piezoresistive pressure sensors to be used in telemetry systems The architecture of the Circuit is based on a voltage-to-time converter and it will be used with an IMEMS. The architecture includes the zero adjustment stage and temperature compensation necessary for piezoresistive pressure sensors and fulfills the requirements of systems implanted inside the human body (small size, high precision, long-term stability and low power consumption).