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G Venchi - One of the best experts on this subject based on the ideXlab platform.

  • An Autonomous Power Supply System Supporting Low-Power Wireless Sensors
    IEEE Transactions on Power Electronics, 2012
    Co-Authors: Enrico Dallago, A. Danioni, M. Marchesi, G Venchi
    Abstract:

    This paper presents a complete autonomous power supply generation system which can find application in a wireless sensor network. Every part of the system is powered only by the energy harvested by an electromagnetic transducer. Besides the transducer, the system comprehends an integrated Electronic Interface working as step-up ac/dc converter, a high-efficiency step-down dc/dc voltage regulator, and, finally, a load which closely replicates the characteristics of the Analog Devices ADF7242 2.4-GHz low-power transceiver, Texas Instruments MSP430 16-bit microcontroller, and Analog Devices AD7814 temperature sensor with 10-bit digital output. The core of the autonomous power supply system is the transducer's dedicated Electronic Interface which is designed for transferring the harvested energy to a storage capacitor and is able to process every voltage pulse coming from the transducer, providing the supply voltage for itself and the rest of the circuitry. The system will be analyzed and experimental results demonstrating the possibility of supporting a wireless communication with the harvested energy will be presented for two situations: in the first one the transducer is driven at its mechanical resonance frequency, and in the second one the same transducer is activated through the body movements of a person.

  • Multi-cycle 0.35-µm CMOS integrated Electronic Interface circuit for energy harvesting systems
    SENSORS 2011 IEEE, 2011
    Co-Authors: Enrico Dallago, A. Danioni, Marco Grassi, Marco Marchesi, Piero Malcovati, G Venchi
    Abstract:

    This paper presents a self-powered active Electronic Interface circuit for energy harvesting system based on an electromagnetic vibration transducer. The Interface circuit has been designed to transfer the harvested energy to a storage capacitor. The circuit is a multi-cycle inductive step up AC/DC converter able to process every voltage pulse coming from the transducer; furthermore, it is supplied by the harvested energy, making the system fully autonomous. The Interface circuit has been designed in 0.35μm, 3.3V-5V CMOS process with high voltage (50V) capability. Experimental results obtained from the whole system are reported.

  • A Self-Powered Electronic Interface for Electromagnetic Energy Harvester
    IEEE Transactions on Power Electronics, 2011
    Co-Authors: Enrico Dallago, A. Danioni, M. Marchesi, V. Nucita, G Venchi
    Abstract:

    This paper presents a self-powered, active Electronic Interface for an energy harvesting system including a vibration-based electromagnetic transducer. The transducer provides a peak voltage of 3.25 V when operated close to its mechanical resonance frequency (about 10.4 Hz) and the power converter has been designed to transfer the harvested energy to a storage capacitor. The circuit is a full-cycle inductive step-up ac/dc converter able to process every voltage pulse coming from the transducer; furthermore, it is supplied by the harvested energy, making the system fully autonomous. The Interface has been designed exploiting an accurate model of the transducer in simulations. A printed circuit board version of the Interface has been simulated and built to gather experimental results and validate the idea. The system demonstrated to be able to build a voltage across the storage capacitor, which is limited only by the safe operating area of the devices.

  • ESSCIRC - Electronic Interface for Piezoelectric Energy Scavenging System
    ESSCIRC 2008 - 34th European Solid-State Circuits Conference, 2008
    Co-Authors: Enrico Dallago, G Venchi, D. Miatton, Valeria Bottarel, Giovanni Frattini, Giulio Ricotti, M. Schipani
    Abstract:

    The paper focuses on an Electronic Interface for systems, called Piezoelectric energy scavenging systems (PESS), which convert the energy of mechanical vibrations into electrical energy using a piezoelectric transducer. The output of the transducer is a strong and irregular function of time hence, to obtain a suitable supply source, an AC-DC conversion is needed. Classical rectifiers (half/full bridge or voltage doubler) with an output storage capacitor do not fit very well, since they work as peak detectors, converting only input voltages which are higher than their output voltage. The paper shows an Electronic Interface which is able to efficiently harvest the energy associated to the randomic voltage waveform delivered by a piezoelectric transducer. Its working principle is based on an inductive step-up converter; an active driving circuit is used to set the phases of the converter. The energy is stored into a capacitor which is also used to supply the active elements of the step-up converter, realizing a completely autonomous energy scavenging system. For this reason the whole circuitry has been designed with a very low-power consumptions, about 700 nA. A prototype was diffused in 5 V CMOS STMicroElectronics technology and measurements showed its effectiveness.

David Dagan Feng - One of the best experts on this subject based on the ideXlab platform.

  • ISCAS - A wearable, wireless Electronic Interface for textile sensors lin shu
    Proceedings of 2010 IEEE International Symposium on Circuits and Systems, 2010
    Co-Authors: David Dagan Feng
    Abstract:

    Electronic Interfaces for wearable sensors require wireless connection, appropriate measurement range, small size, simple and robust structure, insensitivity to noise and comfort to wearers in daily life. A novel wearable, wireless Electronic Interface for resistive textile sensors is presented, which meets the requirements and has the ability to provide real-time measurement. System configuration, accuracy and resolution have been analyzed in-depth and design rules have been defined. Experimental results show that this Electronic Interface exhibits less than 1% error in a large measurement range for wearable textile resistive sensors. It also shows a good stability to power supply interference. The Interface has been successfully applied in a foot pressure measurement syste.

  • ISCAS - A wearable, wireless Electronic Interface for textile sensors lin shu
    Proceedings of 2010 IEEE International Symposium on Circuits and Systems, 2010
    Co-Authors: Xiaoming Tao, David Dagan Feng
    Abstract:

    Electronic Interfaces for wearable sensors require wireless connection, appropriate measurement range, small size, simple and robust structure, insensitivity to noise and comfort to wearers in daily life. A novel wearable, wireless Electronic Interface for resistive textile sensors is presented, which meets the requirements and has the ability to provide real-time measurement. System configuration, accuracy and resolution have been analyzed in-depth and design rules have been defined. Experimental results show that this Electronic Interface exhibits less than 1% error in a large measurement range for wearable textile resistive sensors. It also shows a good stability to power supply interference. The Interface has been successfully applied in a foot pressure measurement syste.

Rade S Popovic - One of the best experts on this subject based on the ideXlab platform.

  • A differential relaxation oscillator as a versatile Electronic Interface for sensors
    Sensors and Actuators A-physical, 1997
    Co-Authors: Philippe A Passeraub, Pierre-andré Besse, Christina De Raad, Rade S Popovic
    Abstract:

    Abstract A simple and versatile Electronic Interface circuit for sensors is presented. The novel Interface circuit is based on a relaxation oscillator in differential configuration. In such a configuration, the sensitivity is strongly increased and compensations are made possible. It can be applied to resistive, capacitive and inductive sensors or detectors. Experimental and simulation results confirm the theory built up. High sensitivity is measured. Non-idealities of Electronic components set the limit of attainable sensitivity.

Enrico Dallago - One of the best experts on this subject based on the ideXlab platform.

  • An Autonomous Power Supply System Supporting Low-Power Wireless Sensors
    IEEE Transactions on Power Electronics, 2012
    Co-Authors: Enrico Dallago, A. Danioni, M. Marchesi, G Venchi
    Abstract:

    This paper presents a complete autonomous power supply generation system which can find application in a wireless sensor network. Every part of the system is powered only by the energy harvested by an electromagnetic transducer. Besides the transducer, the system comprehends an integrated Electronic Interface working as step-up ac/dc converter, a high-efficiency step-down dc/dc voltage regulator, and, finally, a load which closely replicates the characteristics of the Analog Devices ADF7242 2.4-GHz low-power transceiver, Texas Instruments MSP430 16-bit microcontroller, and Analog Devices AD7814 temperature sensor with 10-bit digital output. The core of the autonomous power supply system is the transducer's dedicated Electronic Interface which is designed for transferring the harvested energy to a storage capacitor and is able to process every voltage pulse coming from the transducer, providing the supply voltage for itself and the rest of the circuitry. The system will be analyzed and experimental results demonstrating the possibility of supporting a wireless communication with the harvested energy will be presented for two situations: in the first one the transducer is driven at its mechanical resonance frequency, and in the second one the same transducer is activated through the body movements of a person.

  • Multi-cycle 0.35-µm CMOS integrated Electronic Interface circuit for energy harvesting systems
    SENSORS 2011 IEEE, 2011
    Co-Authors: Enrico Dallago, A. Danioni, Marco Grassi, Marco Marchesi, Piero Malcovati, G Venchi
    Abstract:

    This paper presents a self-powered active Electronic Interface circuit for energy harvesting system based on an electromagnetic vibration transducer. The Interface circuit has been designed to transfer the harvested energy to a storage capacitor. The circuit is a multi-cycle inductive step up AC/DC converter able to process every voltage pulse coming from the transducer; furthermore, it is supplied by the harvested energy, making the system fully autonomous. The Interface circuit has been designed in 0.35μm, 3.3V-5V CMOS process with high voltage (50V) capability. Experimental results obtained from the whole system are reported.

  • A Self-Powered Electronic Interface for Electromagnetic Energy Harvester
    IEEE Transactions on Power Electronics, 2011
    Co-Authors: Enrico Dallago, A. Danioni, M. Marchesi, V. Nucita, G Venchi
    Abstract:

    This paper presents a self-powered, active Electronic Interface for an energy harvesting system including a vibration-based electromagnetic transducer. The transducer provides a peak voltage of 3.25 V when operated close to its mechanical resonance frequency (about 10.4 Hz) and the power converter has been designed to transfer the harvested energy to a storage capacitor. The circuit is a full-cycle inductive step-up ac/dc converter able to process every voltage pulse coming from the transducer; furthermore, it is supplied by the harvested energy, making the system fully autonomous. The Interface has been designed exploiting an accurate model of the transducer in simulations. A printed circuit board version of the Interface has been simulated and built to gather experimental results and validate the idea. The system demonstrated to be able to build a voltage across the storage capacitor, which is limited only by the safe operating area of the devices.

  • ESSCIRC - Electronic Interface for Piezoelectric Energy Scavenging System
    ESSCIRC 2008 - 34th European Solid-State Circuits Conference, 2008
    Co-Authors: Enrico Dallago, G Venchi, D. Miatton, Valeria Bottarel, Giovanni Frattini, Giulio Ricotti, M. Schipani
    Abstract:

    The paper focuses on an Electronic Interface for systems, called Piezoelectric energy scavenging systems (PESS), which convert the energy of mechanical vibrations into electrical energy using a piezoelectric transducer. The output of the transducer is a strong and irregular function of time hence, to obtain a suitable supply source, an AC-DC conversion is needed. Classical rectifiers (half/full bridge or voltage doubler) with an output storage capacitor do not fit very well, since they work as peak detectors, converting only input voltages which are higher than their output voltage. The paper shows an Electronic Interface which is able to efficiently harvest the energy associated to the randomic voltage waveform delivered by a piezoelectric transducer. Its working principle is based on an inductive step-up converter; an active driving circuit is used to set the phases of the converter. The energy is stored into a capacitor which is also used to supply the active elements of the step-up converter, realizing a completely autonomous energy scavenging system. For this reason the whole circuitry has been designed with a very low-power consumptions, about 700 nA. A prototype was diffused in 5 V CMOS STMicroElectronics technology and measurements showed its effectiveness.

Kaiyuan Hou - One of the best experts on this subject based on the ideXlab platform.

  • transient stability of wind turbine adopting a generic model of dfig and singularity induced instability of generators units with power Electronic Interface
    IEEE Transactions on Energy Conversion, 2015
    Co-Authors: Jiayang Ruan, Ying Qiao, Yong Min, Guanghui Shao, Kaiyuan Hou
    Abstract:

    A generic model of grid-connected doubly-fed induction generator (DFIG)-type wind turbines represented by differential-algebraic equations (DAE) is proposed for short-term transient-stability analysis. From the view of analytical research, vital simplifications are made to the complex physical model of DFIGs, whereas characteristic dynamics are still preserved. When the connection between the wind turbine and grid is weak, transient voltage collapse caused by singularity-induced instability (SII) is observed and analyzed adopting the generic model. In addition, it is shown that collapse might also occur when state variables of the dynamical system get out of control when the connection between the wind turbine and grid is stiff, where fast drop of dc-bus voltage occurs. Critical indices for evaluating transient-stability performances of the DFIG are proposed and parameter sensitivity analysis is carried out. Physical meanings of SII in generators/units with power–Electronic Interface in vector-oriented control frame are generalized. Novel interaction between the grid and these nonconventional generators/units is highlighted.