Articoli di riviste: "Piezoelectric DC-DC converter"

1

Dallago, E., e A. Danioni. "Resonance frequency tracking control for piezoelectric transformer DC-DC converter". Electronics Letters 37, n. 22 (2001): 1317. http://dx.doi.org/10.1049/el:20010898.

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Issa, Adel Issa Ben, Salem Alarabi Shufat, Jamal Mohamed Ahmed e Hasan Abunouara. "A bridgeless AC-DC step up regulator circuit for piezoelectric energy harvester". Journal of Pure & Applied Sciences 22, n. 1 (21 febbraio 2023): 12–17. http://dx.doi.org/10.51984/jopas.v22i1.2339.

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Various applications of the piezoelectric energy in the modern world require an efficient AC-DC low power converter. As the two stages converter with bridge rectifiers may not be used because the diodes would not be suitable for low volt ranging between 100 to 200mv, these are considered an efficient element in the low volt circuits because of their entire losses. In this paper, a small and efficient AC-DC low power converter is presented. It directly converts low AC voltage to the required output DC voltage using one stage instead of bridge rectification. The proposed converter combines both boost and buck boost converters which are parallel constructed to condition the positive and negative half cycle of the input AC volt respectively. Two inductors and one capacitor are used for booth circuits in terms of reducing the size. The circuit is tested at 50 kHz switching frequency with two different duty cycles to rectify a 0.5 AC volt to about 3 DC volts with an estimated efficiency of 65%. The simulation result was 3.7 DC V from 0.5 ACV. The circuit analysis and the design guide line are explained. The circuit is designed and tested using Matlab (Simulink) software.

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Almgotir, Hasan Ma, Enaam A. Khaliq Ali, Wedian H. Abd al ameer e Mustafa A. Fadel Al-Qaisi. "Harmonics elimination for DC/DC power supply based on piezoelectric filters". International Journal of Power Electronics and Drive Systems (IJPEDS) 12, n. 1 (1 marzo 2021): 356. http://dx.doi.org/10.11591/ijpeds.v12.i1.pp356-363.

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This research presents a study, modelling and simulation of the piezoelectric material work as filters (piezoelectric filter) used to eliminate the harmonics in power electronic circuits, high order harmonics are generating due to the high switching frequencies and circuit equipment, detailed simulation is achieved for the piezoelectric filter tested in full-bridge DC/DC converter circuit with resistive load works as dc power supply (12 to 48 volt). As a result, the uses of piezoelectric filters have a great impact on harmonics elimination, which leads to reduce the overall total harmonic distortion leads to increase the efficiency, as well as the output voltage from the dc power supply remain constant by varying the load resistance over a wide range. The dc power supply circuit including the piezoelectric filter has been simulated using PSIM (V9.1) power electronic circuit simulation software.

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4

Hwang, Lark-Hoon, Seung-Kwon Na e Gi-Ho Choi. "A study on High Frequency DC-DC Converter Drive using a Piezoelectric Transformer". Journal of the Korea Academia-Industrial cooperation Society 11, n. 2 (28 febbraio 2010): 476–84. http://dx.doi.org/10.5762/kais.2010.11.2.476.

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Roshandel, Emad, Amin Mahmoudi, Solmaz Kahourzade e Hamid Davazdah-Emami. "DC-DC High-Step-Up Quasi-Resonant Converter to Drive Acoustic Transmitters". Energies 15, n. 15 (8 agosto 2022): 5745. http://dx.doi.org/10.3390/en15155745.

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This paper proposes a quasi-resonant step-up DC-DC converter to provide the DC-link voltage for piezoelectric transmitters (PZETs). The resonance not only provides a soft-switching condition for the converter switches, but also helps to decrease the converter element sizes for marine applications. Operation modes of the proposed converter are discussed. The current and voltage of the converter components are derived analytically, and hence the converter gain is obtained. The performance of the proposed high-step-up, high-power density converter is examined through a comprehensive simulation study. The simulation results demonstrate the soft-switching operation and short transient time required for the converter to reach the reference output voltage. The converter output voltage remains unchanged when an inverter with a passive filter is placed at its output while supplying the PZET. The proposed DC-DC converter is prototyped to validate the converter gain and soft-switching operation experimentally. The converter gain and soft-switching results in simulation are well matched with those of the experimental tests. The converter efficiency in three different switching frequencies is obtained experimentally. The power density of the proposed topology is determined via the designing of a printed circuit board. The experimental results demonstrate the appropriate gain and efficiency of the converter in the tested power range.

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Srinivasan, Raghavendran, Umapathy Mangalanathan e Uma Gandhi. "A three-port integrated DC–DC converter for piezoelectric energy harvesting". Ferroelectrics 583, n. 1 (26 ottobre 2021): 212–29. http://dx.doi.org/10.1080/00150193.2021.1980333.

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Touhami, Mustapha, Ghislain Despesse e Francois Costa. "A New Topology of DC–DC Converter Based on Piezoelectric Resonator". IEEE Transactions on Power Electronics 37, n. 6 (giugno 2022): 6986–7000. http://dx.doi.org/10.1109/tpel.2022.3142997.

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KIM, HWASOO, EUNSUNG JANG, DOHYUNG KIM, LARKHOON HWANG e JUHYUN YOO. "THICKNESS–VIBRATION-MODE MULTILAYER PIEZOELECTRIC TRANSFORMER FOR DC-DC CONVERTER APPLICATION". Integrated Ferroelectrics 107, n. 1 (20 ottobre 2009): 12–23. http://dx.doi.org/10.1080/10584580903324071.

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9

Pollet, Benjamin, Ghislain Despesse e Francois Costa. "A New Non-Isolated Low-Power Inductorless Piezoelectric DC–DC Converter". IEEE Transactions on Power Electronics 34, n. 11 (novembre 2019): 11002–13. http://dx.doi.org/10.1109/tpel.2019.2900526.

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Abidin, Nik Ahmad Kamil Zainal, Norkharziana Mohd Nayan, M. M. Azizan, Nursabirah Jamel, Azuwa Ali, N. A. Azli e N. M. Nordin. "Performances of Multi-Configuration Piezoelectric Connection with AC-DC Converter in Low Frequency Energy Harvesting System". Journal of Physics: Conference Series 2550, n. 1 (1 agosto 2023): 012001. http://dx.doi.org/10.1088/1742-6596/2550/1/012001.

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Abstract Harvesting energy by capturing vibration from low frequency energy have been explored extensively. In essence, a single piezoelectric transducer or an array of piezoelectric connections are used to convert kinetic energy into electrical energy in order to produce low frequency energy. In this paper, multi-configuration array piezoelectric connections are used to investigate the performances of different converter circuit types in low energy harvesting applications. This research utilized three pieces of circular piezoelectric sensor to test the combinations of array connection. There are four options for the piezoelectric sensor configuration: parallel (P), series (S), parallel-series (PS), and series-parallel (SP) while the full wave bridge rectifier (FWBR), parallel voltage multiplier (PVM), and parallel Synchronized Switch Harvesting on Inductor (P-SSHI) converter circuit are chosen AC-DC converter circuits. The system is assessed using a variety of load configurations, including 10 kΩ and 1 MΩ with a 3 Hz input frequency. In order to produce the highest possible output of collected power, the observation focuses on identifying the ideal combination of array piezoelectric connections with AC-DC converter. The result shows that 3-Parallel (3P) piezoelectric connection obtained a higher power output among the other types of array piezoelectric which was 5.97μW. The FWBR circuit generated the highest output power with 2.42μW for a combination of piezoelectric sensors array of 3P connection with the AC-DC converter.

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Vasic, Dejan, Yuan-Ping Liu, Denis Schwander, François Costa e Wen-Jong Wu. "Improvement of burst-mode control of piezoelectric transformer based DC/DC converter". Smart Materials and Structures 22, n. 5 (10 aprile 2013): 055020. http://dx.doi.org/10.1088/0964-1726/22/5/055020.

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Boles, Jessica D., Joshua J. Piel e David J. Perreault. "Enumeration and Analysis of DC–DC Converter Implementations Based on Piezoelectric Resonators". IEEE Transactions on Power Electronics 36, n. 1 (gennaio 2021): 129–45. http://dx.doi.org/10.1109/tpel.2020.3004147.

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13

Sarker, Mahidur R., Azah Mohamed e Ramizi Mohamed. "Modelling and Simulation an AC-DC Rectifier Circuit Based on Piezoelectric Vibration Sensor for Energy Harvesting System". Applied Mechanics and Materials 785 (agosto 2015): 131–35. http://dx.doi.org/10.4028/www.scientific.net/amm.785.131.

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This paper presents the modeling of a full-wave rectifier circuit based on piezoelectric vibration transducer for energy-harvester system. Piezoelectric vibration crystals are a viable means of harvesting energy for low-power embedded systems e.g. wireless sensor network. Distinct power handling circuits are assessed with the presence of piezoelectric vibration based energy harvesting transducer. Inside the interface circuit, the voltage should be started up when the AC input voltage is very low to supply a regulated DC voltage up to 2V. An active technique is chosen to design an ultra-low power circuit from a piezoelectric vibration transducer. MOSFET bride ac–dc rectifier, energy storage device e.g. capacitor and boost converter with regulator are the common components of the energy harvesting circuits. An integrated promoter ac-dc rectifier circuit and boost converter that accept a maximum input voltage of 0.3V and provide a regulated output voltage of 2V serve as the supply. The MOSFET and thyristor are considered to develop the proposed circuit replacing conventional ac-dc rectifier due to low input voltage at which diode does not work.

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Haseeb, Abdul, Mahesh Edla, Ahmed Mostafa Thabet, Mikio Deguchi e Muhammad Kamran. "A Self-Powered Dual-Stage Boost Converter Circuit for Piezoelectric Energy Harvesting Systems". Energies 16, n. 5 (6 marzo 2023): 2490. http://dx.doi.org/10.3390/en16052490.

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Miniaturised piezoelectric devices are emerging energy harvesting sources that are appropriate for various implantable and wearable applications. However, these piezoelectric devices exhibit considerable internal resistance due to their internal impedance, which leads to self-start and low-energy conversion failures. This paper describes a dual-stage boost converter circuit by facilitating self-powering features and boosting the low voltage harvested by the piezoelectric devices into dc. The proposed circuit comprises conversion stages of ac-dc and dc-dc in Stages I and II, respectively. In addition, the proposed circuit does not require employing the auxiliary circuits to generate the train pulses by triggering the bidirectional switches to envelop the current being stored in Stage II and kick-start the self-powered circuit for piezoelectric energy harvesting systems. Theoretical assumptions and control strategies were tested and verified with ideal and impedance input sources. The proposed circuit could convert a low voltage of 3 Vac into 19 Vdc. The maximum attained output power by the proposed circuit was 3.61 mW. The outcome depicted that the proposed circuit boosted the low voltage and outperformed the existing literature circuits in terms of output voltage and power.

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Mbele Ndzana, Nicolas Daniel, Claude Bernard Lekini Nkodo, Aristide Tolok Nelem, Mathieu Jean Pierre Pesdjock, Yannick Antoine Abanda, Achille Melingui, Odile Fernande Zeh e Pierre Ele. "Contribution to the Development of a Smart Ultrasound Scanner: Design and Analysis of the High-Voltage Power Supply of the Transmitter". Inventions 8, n. 5 (3 settembre 2023): 113. http://dx.doi.org/10.3390/inventions8050113.

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A smart ultrasound scanner plays an important role in the transition to point-of-care imaging. DC–DC bipolar converters are essential in the generation of the ultrasound burst signal as they power the piezoelectric transducer. The conventional bipolar converter has minimal output gain and high-voltage stress, and the longer duty cycle on the semiconductors produces high conduction losses and reduces the efficiency of the system. The transmitter supply voltage is minimal, necessitating the use of high-gain bipolar converters. This proposed study is concerned with the development of an improved high-output voltage gain symmetric bipolar DC–DC converter topology which may be suitable for applications such as powering a smart ultrasound scanner transmitter. The proposed converter combines the conventional single-ended primary inductor converter (SEPIC) with a voltage multiplier cell (VMC) to improve voltage gain, transistor duty cycle, efficiency, and reliability. The present study describes the working principle of the proposed converter. The analysis of the voltage gain is carried out in continuous current mode (CCM) and discontinuous current mode (DCM), taking into account the nonidealities of the device. The simulation of the proposed system is carried out in the numerical environment Matlab/Simulink in order to verify its characteristics. A prototype model is realized and the experimental study presented validates the theoretical arguments and simulations. Due to the advantages of continuous input current, self-balancing bipolar outputs, and small component size, the proposed converter is a suitable choice for smart ultrasound transmitters.

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Kang, Jinhee, Yongjin Kim, Juhyun Yoo e Larkhoon Hwang. "Piezoelectric Energy Harvesting Using PMW-PNN-PZT Ceramics for DC-DC Converter Application". Ferroelectrics Letters Section 42, n. 4-6 (2 novembre 2015): 87–96. http://dx.doi.org/10.1080/07315171.2015.1068505.

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17

Hossain, Md Alamgir, Md Abdulla-Al-Mamun e Adhir Chandra Paul. "Energy Harvesting from Close Type Footwear: A Smart Design Approach". Textile & Leather Review 5 (2 luglio 2022): 253–67. http://dx.doi.org/10.31881/tlr.2022.18.

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The mechanical energy harvesting from human body, particularly from the feet, is an alternative process for acquiring potential electricity. Human body weight-pressure produces mechanical energy during walking and running. In this study, a special type of footwear was designed by inserting piezoelectric transducer (PZT) under the heel area to convert the mechanical energy into electrical energy. The experiment has been conducted with a circuit comprising of bridge rectifier, capacitor, and a DC-DC converter with an external output connection. It has been found that the AC voltage maximum is 43 V. When the AC voltage was converted to continuous DC, it was found the voltage decreased drastically. The highest generated energy has been found to be 317.52 mJ for two hours (8000 steps per day). Our special type of shoe and circuit design have demonstrated the feasibility of harvesting the mechanical energy into the electrical energy from piezoelectric materials.

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S. Dhayabarasivam, S., K. Jayanthi e Gouthame Pragatheeswaran. "Design and Analysis of Modified Diode Rectifier Circuit Suitable for Piezoelectric Energy Harvester for Biomedical Applications". International Journal of Engineering & Technology 7, n. 3.16 (26 luglio 2018): 67. http://dx.doi.org/10.14419/ijet.v7i3.16.16185.

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Nowadays renewable energy sources play a significant role in the energy harvesting. For the past decade various energy harvesting methods have been discussed by researchers for capturing the energy from different sources. From the survey, one of the most prominent methods is the use of piezoelectric transducers for harvesting the energy. It is known that piezoelectric energy harvesting is the easiest method of energy harvesting from the various sources available such as human walking, dancing etc. Therefore this method can be implemented in system for wide variety of applications. The piezoelectric transducer AC output is of very low voltage and power and hence insufficient to drive any electrical application. Most of the small scale electrical application generally runs on the DC voltage, therefore the AC voltage obtained from the piezo transducer vibration is rectified using rectifiers to generate DC voltage. Thus in this paper, a modified rectifier AC/DC converter with the combination of an inductor is placed in the rectifier, which enhances the voltage and power from the rectifier output. In order to enhance the voltage rating, a DC/DC converter has been added at the end of a rectifier circuit. From the simulation results the proposed circuit modified rectifier has improved the output voltage as well as output current by 10.19 volts and 0.1019 amps respectively for input voltage of 5V. When compared with conventional rectifier circuit.

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Halim, Md Abdul, Md Momin Hossain e Mst Jesmin Nahar. "Development of a Nonlinear Harvesting Mechanism from Wide Band Vibrations". International Journal of Robotics and Control Systems 2, n. 3 (13 luglio 2022): 467–76. http://dx.doi.org/10.31763/ijrcs.v2i3.524.

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The main objective of this study is to present an energy harvesting approach to scavenge electrical energy from mechanically vibrated piezoelectric materials.A mechanical energy harvester device has been developed and tested. The fundamental benefit of this mechanical device is that it can function effectively in a wide range of ambient vibration frequencies, whereas traditional harvesters are limited. A suitable conditioning circuit for energy scavenging has been proposed which can achieve optimal power stream. For controlling the power flow into the battery a circuit has been designed consisting of an AC to DC rectifier, an output capacitor, a switch mode DC to DC converter, and an electromechanical battery. An adaptive control system has been described for switching any electronics devices and maximizing battery storage capacity. Experimental results reveal that the power transfer rate can be enhanced by approximately 400% by utilizing the adaptive DC to DC converter. Various investigations on the piezoelectric harvester have revealed that the energy generated by the mechanical device can exceed the 1.4-volt barrier, which is suitable for charging capacitors in electronics devices. The findings of this study will be crucial in mitigating society's energy crisis.

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Hwang, L. H., S. H. Oh, J. H. Kang, D. I. Kwon, S. K. Na e M. T. Cho. "A Study on the Driving of High Frequency DC–DC Converter Using Piezoelectric Transformer". Advanced Science Letters 24, n. 3 (1 marzo 2018): 1991–95. http://dx.doi.org/10.1166/asl.2018.11828.

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Wang, Chua-Chin, Lean Karlo S. Tolentino, Pin-Chuan Chen, John Richard E. Hizon, Chung-Kun Yen, Cheng-Tang Pan e Ya-Hsin Hsueh. "A 40-nm CMOS Piezoelectric Energy Harvesting IC for Wearable Biomedical Applications". Electronics 10, n. 6 (11 marzo 2021): 649. http://dx.doi.org/10.3390/electronics10060649.

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This investigation presents an energy harvesting IC (integrated circuit) for piezoelectric materials as a substitute for battery of a wearable biomedical device. It employs a voltage multiplier as first stage which uses water bucket fountain approach to boost the very low voltage generated by the piezoelectric. The boosted voltage was further improved by the boost DC/DC converter which follows a predefined timing control directed by the digital logic for the said converter to be operated efficiently. TSMC 40-nm CMOS process was used for implementation and fabrication of the energy harvesting IC. The chip’s core has an area of 0.013 mm2. With an output of 1 V which is enough to supply the wearable biomedical devices, it exhibited the highest pump gain and accommodated the lowest piezoelectric generated voltage among recent related works.

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Hong, Jianfeng, Fu Chen, Ming He, Sheng Wang, Wenxiang Chen e Mingjie Guan. "Study of a Low-Power-Consumption Piezoelectric Energy Harvesting Circuit Based on Synchronized Switching Technology". Energies 12, n. 16 (17 agosto 2019): 3166. http://dx.doi.org/10.3390/en12163166.

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This paper presents a study of a piezoelectric energy harvesting circuit based on low-power-consumption synchronized switch technology. The proposed circuit includes a parallel synchronized switch harvesting on inductor interface circuit (P-SSHI) and a step-down DC-DC converter. The synchronized switch technology is applied to increase the conversion efficiency of the circuit. The DC-DC converter is used to accomplish the impedance matching for different loads. A low-power-consumption microcontroller and discrete components are used to build the P-SSHI interface circuit. The study starts with theoretical analysis and simulations of the P-SSHI interface circuit. Simulations and experiments were conducted to validate the theoretical analysis. The experimental results show that the maximum energy harvested by the system with a P-SSHI interface circuit is 231 μW, which is 2.89 times that of a system without the P-SSHI scheme. The power consumption of the P-SSHI interface circuit can be as low as 10.6 μW.

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Han, Shousheng, Hanjun Jiang, Jingzhong Ma, Xiaoming Wu e Tianling Ren. "Ultrahigh Step-Up Coupled-Inductor DC-DC Converter With Soft-Switching for Driving Piezoelectric Actuators". IEEE Transactions on Circuits and Systems II: Express Briefs 68, n. 8 (agosto 2021): 2902–6. http://dx.doi.org/10.1109/tcsii.2021.3072206.

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Ping Lin, Yuan, Dejan Vasic, François Costa, Denis Schwander e Marc Marmouget. "Piezoelectric transformer 28 V/15 V-10 W DC/DC converter with fixed switching frequency". European Journal of Electrical Engineering 14, n. 5 (30 ottobre 2011): 601–16. http://dx.doi.org/10.3166/ejee.14.601-616.

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Diaz, Juan, Fernando Nuno, Miguel J. Prieto, Juan A. Martin-Ramos e Pedro JosÉ Villegas Saiz. "Closing a Second Feedback Loop in a DC–DC Converter Based on a Piezoelectric Transformer". IEEE Transactions on Power Electronics 22, n. 6 (novembre 2007): 2195–201. http://dx.doi.org/10.1109/tpel.2007.909240.

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Dong, P., K. W. E. Cheng, K. W. Kwok, S. L. Ho, Y. Lu e J. M. Yang. "Singular perturbation modelling technique and analysis for class-E DC–DC converter using piezoelectric transformer". IET Power Electronics 1, n. 4 (2008): 518. http://dx.doi.org/10.1049/iet-pel:20060476.

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Teuschel, Marco, Paul Heyes, Samu Horvath, Christian Novotny e Andrea Rusconi Clerici. "Temperature Stable Piezoelectric Imprint of Epitaxial Grown PZT for Zero-Bias Driving MEMS Actuator Operation". Micromachines 13, n. 10 (10 ottobre 2022): 1705. http://dx.doi.org/10.3390/mi13101705.

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In piezoelectric transducer applications, it is common to use a unipolar operation signal to avoid switching of the polarisation and the resulting nonlinearities of micro-electromechanical systems. However, semi-bipolar or bipolar operation signals have the advantages of less leakage current, lower power consumption and no additional need of a DC−DC converter for low AC driving voltages. This study investigates the potential of using piezoelectric layers with an imprint for stable bipolar operation on the basis of epitaxially grown lead zirconate titanate cantilevers with electrodes made of a metal and metal oxide stack. Due to the manufacturing process, the samples exhibit high crystallinity, rectangular shaped hysteresis and a high piezoelectric response. Furthermore, the piezoelectric layers have an imprint, indicating a strong built-in field, which shifts the polarisation versus electric field hysteresis. To obtain the stability of the imprint, laser doppler vibrometry and switching current measurements were performed at different temperatures, yielding a stable imprinted electric field of −1.83 MV/m up to at least 100 °C. The deflection of the cantilevers was measured with a constant AC driving voltage while varying the DC bias voltage to examine the influence of the imprint under operation, revealing that the same high deflection and low nonlinearities, quantified by the total harmonic distortion, can be maintained down to low bias voltages compared to unipolar operation. These findings demonstrate that a piezoelectric layer with a strong imprint makes it possible to operate with low DC or even zero DC bias, while still providing strong piezoelectric response and linear behaviour.

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Kong, Guoli, e Yu Su. "A dual-stage low-power converter driving for piezoelectric actuator applied in flapping-wing micro aerial vehicles". International Journal of Advanced Robotic Systems 16, n. 3 (1 maggio 2019): 172988141985171. http://dx.doi.org/10.1177/1729881419851710.

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It is essential for flapping-wing micro aerial vehicles to have a driver with compact size, low mass, and high conversion efficiency in low-power application. In this article, a dual-stage low-power converter driving for piezoelectric actuator was designed and implemented, which can be applied in flapping-wing micro aerial vehicles. Using the “simultaneous drive” method, an Residual Current Devices (RCD) passive snubber flyback DC/DC step-up converter cascaded with a bidirectional active half-bridge drive stage is designed. The flyback converter is controlled by pulse width modulation in discontinuous conduction mode to ensure the stability of the output high voltage. The half-bridge drive stage takes the approach of comparing the output voltage signal with an ideal waveform lookup table to generate arbitrary unipolar signals. The proposed converter has a weight of 345 mg, a size of 285 mm2 (19 × 15 mm2), a maximum output power of 500 mW, and a maximum conversion efficiency of 64.5%. An experiment driving for piezoelectric actuator was performed to observe the displacement generated by the converter. According to the experimental results, this converter can be applied in flapping-wing micro aerial vehicles.

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Jeong, Se Yeong, Jae Yong Cho, Seong Do Hong, Wonseop Hwang, Hamid Jabbar, Jung Hwan Ahn, Jeong Pil Jhun e Tae Hyun Sung. "Self-Powered Operational Amplifying System with a Bipolar Voltage Generator Using a Piezoelectric Energy Harvester". Electronics 9, n. 1 (27 dicembre 2019): 41. http://dx.doi.org/10.3390/electronics9010041.

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Piezoelectric devices previously studied usually generated a single voltage to power an electronic device. However, depending on the user’s purpose, the electronic device may need dual power supply. Here, we report a self-powered bipolar voltage generator using a piezoelectric energy harvester with two piezoelectric devices. When a force is applied to the piezoelectric energy harvester, the two piezoelectric devices separately supply positive and negative voltages to the operational amplifier that requires dual power supply to amplify an AC signal that have positive and negative polarity. At the same time, the harvester supplies additional power to an electronic device through a DC-to-DC converter with an output voltage of 3.3 V. This technique proves the feasibility of applying the piezoelectric energy harvester to operational amplifying systems in the field of sound, earthquake, and sonar that require both bipolar and single voltages without external power sources.

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Su, Y. H., Y. P. Liu, D. Vasic, F. Costa, W. J. Wu e C. K. Lee. "Design of piezoelectric transformer-based DC/DC converter to improve power by using heat transfer equipment". International Journal of Applied Electromagnetics and Mechanics 46, n. 4 (1 ottobre 2014): 845–57. http://dx.doi.org/10.3233/jae-140093.

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Cheng, Chun-An, Hung-Liang Cheng, Chien-Hsuan Chang, En-Chih Chang, Chih-Yang Tsai e Long-Fu Lan. "A Novel and Cost-Effective Drive Circuit for Supplying a Piezoelectric Ceramic Actuator with Power-Factor-Correction and Soft-Switching Features". Micromachines 12, n. 10 (9 ottobre 2021): 1229. http://dx.doi.org/10.3390/mi12101229.

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This paper proposes a novel and cost-effective drive circuit for supplying a piezoelectric ceramic actuator, which combines a dual boost AC-DC converter with a coupled inductor and a half-bridge resonant DC-AC inverter into a single-stage architecture with power-factor-correction (PFC) and soft-switching characteristics. The coupled inductor of the dual boost AC-DC converter sub-circuit is designed to work in discontinuous conduction mode (DCM), so the PFC function can be realized in the proposed drive circuit. The resonant tank of the half-bridge resonant inverter sub-circuit is designed as an inductive load, so that the two power switches in the presented drive circuit can achieve zero-voltage switching (ZVS) characteristics. A 50 W-rated prototype drive circuit providing a piezoelectric ceramic actuator has been successfully implemented in this paper. From the experimental results at 110 V input utility-line voltage, the drive circuit has the characteristics of high power factor and low input current total-harmonic-distortion factor, and two power switches have ZVS characteristics. Therefore, satisfactory outcomes from measured results prove the function of the proposed drive circuit.

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Cheng, Chun-An, Hung-Liang Cheng, Chien-Hsuan Chang, En-Chih Chang, Long-Fu Lan e Hao-Fang Hsu. "An Input-Current Shaping and Soft-Switching Drive Circuit Applied to a Piezoelectric Ceramic Actuator". Micromachines 14, n. 10 (5 ottobre 2023): 1906. http://dx.doi.org/10.3390/mi14101906.

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Piezoelectric ceramic actuators utilize an inverse piezoelectric effect to generate high-frequency vibration energy and are widely used in ultrasonic energy conversion circuits. This paper presents a novel drive circuit with input-current shaping (ICS) and soft-switching features which consists of a front AC-DC full-wave bridge rectifier and a rear DC-AC circuit combining a stacked boost converter and a half-bridge resonant inverter for driving a piezoelectric ceramic actuator. To enable ICS functionality in the proposed drive circuit, the inductor of the stacked boost converter sub-circuit is designed to operate in boundary-conduction mode (BCM). In order to allow the two power switches in the proposed drive circuit to achieve zero-voltage switching (ZVS) characteristics, the resonant circuit of the half-bridge resonant inverter sub-circuit is designed as an inductive load. In this paper, a prototype drive circuit for providing piezoelectric ceramic actuators was successfully implemented. Experimental results tested at 110 V input utility voltage show that high power factor (PF > 0.97), low input current total harmonic distortion (THD < 16%), and ZVS characteristics of the power switch were achieved in the prototype drive circuit.

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Chen, I. Chou, Che-Wei Liang e Tsung-Heng Tsai. "A Single-Inductor Dual-Input Dual-Output DC–DC Converter for Photovoltaic and Piezoelectric Energy Harvesting Systems". IEEE Transactions on Circuits and Systems II: Express Briefs 66, n. 10 (ottobre 2019): 1763–67. http://dx.doi.org/10.1109/tcsii.2019.2921349.

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Liu, Yuan-Ping, Dejan Vasic, François Costa, Wen-Jong Wu e Chih-Kung Lee. "Design of fixed frequency controlled radial-mode stacked disk-type piezoelectric transformers for DC/DC converter applications". Smart Materials and Structures 18, n. 8 (23 luglio 2009): 085025. http://dx.doi.org/10.1088/0964-1726/18/8/085025.

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35

Su, Yu-Hao, Yuan-Ping Liu, Dejan Vasic, Francois Costa, Wen-Jong Wu e Chih-Kung Lee. "Study of a piezoelectric transformer-based DC/DC converter with a cooling system and current-doubler rectifier". Smart Materials and Structures 22, n. 9 (1 agosto 2013): 095005. http://dx.doi.org/10.1088/0964-1726/22/9/095005.

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36

Park, Yong Wook. "Electrical Properties of a Piezoelectric Transformer for an AC-DC Converter". Journal of the Korean Physical Society 57, n. 4(1) (15 ottobre 2010): 1131–33. http://dx.doi.org/10.3938/jkps.57.1131.

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37

Inoue, Takeshi, Sunao Hamamura, Mitsuru Yamamoto, Atsushi Ochi e Yasuhiro Sasaki. "AC–DC Converter Based on Parallel Drive of Two Piezoelectric Transformers". Japanese Journal of Applied Physics 47, n. 5 (23 maggio 2008): 4011–14. http://dx.doi.org/10.1143/jjap.47.4011.

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38

Almobaied, Moayed, e Ahmed Mosa Musleh. "Comparative Study Between Sliding Mode Controller and PI Controller for AC/DC Bridgeless Converter Under Uncertain Parameters". Acta Electrotechnica et Informatica 22, n. 4 (1 dicembre 2022): 3–11. http://dx.doi.org/10.2478/aei-2022-0016.

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Abstract In this paper, a comparative study between nonlinear sliding mode controller (SMC) and standard PI controller for stabilizing bridgeless AC/DC converter under uncertain parameters is presented. This type of converters is widely used in harvesting low energy systems as in wind turbine, piezoelectric transducers and heat exchange transducers. Designing robust controllers to enhance the efficiency and accuracy of these converters has become a promising track in control engineering field. The traditional bridge rectifier is widely used in the majority types of AC/DC conventional converters to gain the rectified DC voltage from the low AC input voltage source. However, these traditional converters are not effective for the low output voltage of renewable sources due to the voltage drops across rectifier’s diodes. The proposed SMC-PI controller is used to enhance the stability and the response of these converters under uncertain parameters comparing with the standard PI controller. The proposed approach consists of both Boost and Buck-Boost converters with two controllers in order to maximize the useful output energy from the source. The graphical method has been used to obtain the limitation of the coefficients of the standard PI controller. A parameter space approach is used to find all robust stabilization PI coefficients and the stability regions. A comparative study using simulations in MATLAB is presented to ensure the effectiveness and robustness of the proposed SMC-PI controller under some external disturbances.

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39

Dannier, Adolfo, Gianluca Brando e Francesca Ruggiero. "The Piezoelectric Phenomenon in Energy Harvesting Scenarios: A Theoretical Study of Viable Applications in Unbalanced Rotor Systems". Energies 12, n. 4 (21 febbraio 2019): 708. http://dx.doi.org/10.3390/en12040708.

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The present paper deals with the promising energy harvesting applications of a composite piezoelectric metal support that is properly designed for the rotor of a mechanical system. The aim is to determine whether the vibrational power coming from the static residual imbalance, which is generally considered to be an undesired and useless side-effect of the rotation, can be converted into electric power and then stored to be used in other applications. The analysis, starting from the Jeffcott rotor model and the piezoelectric constitutive equations, has been carried out by developing an approximated linear model of a piezoelectric support, in order to theoretically evaluate the performance and the feasibility of the proposed system. The accuracy of the exploited analytical model has been validated for both static and dynamic operations by 3D Ansys® Mechanical APDL. Finally, a MatLab®/Simulink® model has been built to simulate the electric behavior of the piezoelectric material, and to estimate the power that it is possible to extract via an alternative/direct current converter (AC/DC converter). The numerical results achieved confirm the effectiveness of the proposed energy-harvesting system.

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Quattrocchi, Antonino, Roberto Montanini, Salvatore De Caro, Saverio Panarello, Tommaso Scimone, Salvatore Foti e Antonio Testa. "A New Approach for Impedance Tracking of Piezoelectric Vibration Energy Harvesters Based on a Zeta Converter". Sensors 20, n. 20 (16 ottobre 2020): 5862. http://dx.doi.org/10.3390/s20205862.

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Piezoelectric energy harvesters (PEHs) are a reduced, but fundamental, source of power for embedded, remote, and no-grid connected electrical systems. Some key limits, such as low power density, poor conversion efficiency, high internal impedance, and AC output, can be partially overcome by matching their internal electrical impedance to that of the applied resistance load. However, the applied resistance load can vary significantly in time, since it depends on the vibration frequency and the working temperature. Hence, a real-time tracking of the applied impedance load should be done to always harvest the maximum energy from the PEH. This paper faces the above problem by presenting an active control able to track and follow in time the optimal working point of a PEH. It exploits a non-conventional AC–DC converter, which integrates a single-stage DC–DC Zeta converter and a full-bridge active rectifier, controlled by a dedicated algorithm based on pulse-width modulation (PWM) with maximum power point tracking (MPPT). A prototype of the proposed converter, based on discrete components, was created and experimentally tested by applying a sudden variation of the resistance load, aimed to emulate a change in the excitation frequency from 30 to 70 Hz and a change in the operating temperature from 25 to 50 °C. Results showed the effectiveness of the proposed approach, which allowed to match the optimal load after 0.38 s for a ΔR of 47 kΩ and after 0.15 s for a ΔR of 18 kΩ.

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Kamran, Muhammad, Mahesh Edla, Ahmed Mostafa Thabet, Mustafa Ucgul, Deguchi Mikio e Vinh Bui. "A Self-Powered VDJT AC–DC Conversion Circuit for Piezoelectric Energy Harvesting Systems". Designs 7, n. 4 (20 luglio 2023): 94. http://dx.doi.org/10.3390/designs7040094.

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A comprehensive model for micro-powered piezoelectric generator (PG), analysis of operation, and control of voltage doubler joule thief (VDJT) circuit to find the piezoelectric devices (PD’s) optimum functioning points are discussed in the present article. The proposed model demonstrates the power dependence of the PG on mechanical excitation, frequency, and acceleration, as well as outlines the load behaviour for optimal operation. The proposed VDJT circuit integrates the combination of voltage doubler (VD) and joule thief circuit, whereas the VD circuit works in Stage 1 for AC (alternating current)–DC (direct current) conversion, while a joule thief circuit works in Stage 2 for DC–DC conversion. The proposed circuit functions as an efficient power converter, which converts power from AC–DC and boosts the voltage from low to high without employing any additional electronic components and generating duty cycles. The electrical nature of the input (i.e., PD) of a VDJT circuit is in perfect arrangement with the investigated optimisation needs when using the proposed control circuit. The effectiveness of the proposed VDJT circuit is examined in terms of both simulation and experiment, and the results are presented. The proposed circuit’s performance was validated with available results of power electronics interfaces in the literature. The proposed circuit’s flexibility and controllability can be used for various applications, including mobile battery charging and power harvesting.

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42

Liu, Wei, Yunlai Shi, Zhijun Sun, Li Zhang e Qian Zhang. "High Step-Up Ratio DC-AC Converter Using Fourth-Order LCLC Resonant Circuit for Ultrasonic Fingerprint-Sensor Drivers". Micromachines 14, n. 2 (4 febbraio 2023): 393. http://dx.doi.org/10.3390/mi14020393.

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Ultrasonic fingerprint sensors are becoming more widely used in thick or flexible displays. In order to better identify fingerprint information, ultrasonic sensors need to generate more ultrasonic energy, which can be transmitted to the display surface through media with higher acoustic impedance. In this paper, a DC-AC converter with a high lift ratio was proposed to enhance the transmission energy of the ultrasonic fingerprint sensor, thus helping to improve the identification. The converter comprises a full-bridge inverter and two LC resonant circuits. The introduction of an additional LC resonant circuit into the traditional Class-D LC resonant converter effectively increases the boost ratio of the proposed converter from 5 to 22. When used as a part of the ultrasonic fingerprint sensing system, the proposed converter can amplify the 20-V low-voltage DC required to drive the piezoelectric organic film to 376 V high-voltage AC. The voltage of the wave received from this new driver is equal to 970 mV, which greatly exceeds the 376 mV achieved by using the Class-D converter alone. In this paper, the topology proposed by the ultrasonic fingerprint sensor converter driver was experimentally verified, which greatly improved the boost ratio and can be considered suitable for wider applications.

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43

Kamran, Muhammad, Mahesh Edla, Ahmed Mostafa Thabet, Abdul Haseeb, Deguchi Mikio e Vinh Bui. "A Self-Powered FBRJT AC-DC Conversion Circuit for Piezoelectric Energy Harvesting Systems". Energies 16, n. 4 (9 febbraio 2023): 1734. http://dx.doi.org/10.3390/en16041734.

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In this study, a complete model for a miniature excitation-powered piezoelectric generator (PG), analysis modes of operation and control of a full-bridge joule thief (FBRJT) circuit to identify the optimal points were investigated. The proposed model revealed the PG’s power dependency on mechanical excitation, acceleration, and frequency and defined the load behaviour for power optimisation. The proposed circuit, namely FBRJT, was integrated with the conventional full-bridge rectifier (FBR) in Stage 1 for AC-DC conversion and with the joule thief circuit in Stage 2 for DC-DC conversion. This integration acted as a boost converter without utilising the duty cycles and additional switching components. The electrical nature of the input of FBRJT with a simple structure, sensor-less control and auxiliary circuits showed a consistent agreement with the investigated testing scenarios using both ideal and impedance power sources. Additionally, the performance of the proposed circuit was also verified against the published results of power electronics circuits. The developed versatile circuit and control system can be utilised for many applications, such as mobile battery charging and energy harvesting.

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44

Wu, Liao, Chenrui Guo, Peng Liu e Wei Wang. "A direct AC-DC converter integrated with SSHI circuit for piezoelectric energy harvesting". IEICE Electronics Express 14, n. 11 (2017): 20170431. http://dx.doi.org/10.1587/elex.14.20170431.

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45

Engleitner, Raffael, José Renes Pinheiro, Fábio Ecke Bisogno, Matthias Radecker e Yujia Yangy. "Normalized statical analysis with frequency and load variation for the class-E converter based on piezoelectric transformers". Sba: Controle & Automação Sociedade Brasileira de Automatica 22, n. 6 (dicembre 2011): 573–84. http://dx.doi.org/10.1590/s0103-17592011000600003.

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Piezoelectric transformers (PTs) allow the design of promising power supply applications, increasing efficiency, reducing size, facilitating the achievement of high transformation ratio, besides providing high immunity against electromagnetic noise. Due to the electrical equivalent model having resonant characteristics, some resonant topologies are used to build these power supplies, i.e. the Class-E converter. In order to make easier the analysis of high order converters, it's possible to use a normalized analysis method. The control of the Class-E converter using PTs is implemented through the switching frequency and duty cycle variation. The static gain is achieved though the switching frequency variation, while the duty cycle is adjusted with the purpose of achieving soft switching for different frequencies and loads. This paper shows a normalized analysis of this process, including a normalized frequency and load variation, without the need of design parameters. Experimental results for a 3W step-down converter are shown for a universal 85-260VAC input and out put voltage 6 V DC, to validate the proposed method.

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46

Fedulov, Fedor, e Leonid Fetisov. "Vibrational energy harvesting device with magnetic tip mass". MATEC Web of Conferences 211 (2018): 05001. http://dx.doi.org/10.1051/matecconf/201821105001.

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In this paper, the energy-harvesting device based on vibrational piezoelectric transducer for AC magnetic field conversion is presented. The harvester consists of the transducer and an AC/DC-converter. The load dependencies of the transducer showed that the maximal rms power reached a peak of Prms = 37 μW at f = 50 Hz and Prms = 200 μW at f = 48 Hz. If the harvester is placed into an external AC magnetic field h(t) of the frequency f = 48 Hz and constant amplitude of h = 5 Oe, DC voltage of fixed level (1.8 V, 2.5 V, 3.3 V or 3.6 V) is available on the output. Charging time depends on the voltage level and has a maximum value of t ≈ 11 s for 3.6 V and minimum value t ≈ 6 s for 1.8 V.

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Haseeb, Abdul, Mahesh Edla, Mustafa Ucgul, Fendy Santoso e Mikio Deguchi. "A Voltage Doubler Boost Converter Circuit for Piezoelectric Energy Harvesting Systems". Energies 16, n. 4 (6 febbraio 2023): 1631. http://dx.doi.org/10.3390/en16041631.

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This paper describes the detailed modelling of a vibration-based miniature piezoelectric device (PD) and the analysis modes of operation and control of a voltage doubler boost converter (VDBC) circuit to find the PD’s optimal operating conditions. The proposed VDBC circuit integrates a conventional voltage doubler (VD) circuit with a step-up DC-DC converter circuit in modes 1–4, while a non-linear synchronisation procedure of a conventional boost converter circuit is employed in modes 5–6. This integration acted as the voltage boost circuit without utilising duty cycles and complex auxiliary switching components. In addition, the circuit does not require external trigger signals to turn on the bidirectional switches. This facilitates the operation of VDBC circuit at very low AC voltage (Vac ≥ 0.5 V). Besides this, the electrical characteristics of VDBC circuit’s input (i.e., PD) perfectly concurs with the studied testing scenarios using impedance power sources (mechanical shaker). Firstly, the proposed circuit which can rectify the PD’s output was tested at both constant input voltage with varying excitation frequency and constant excitation frequency with varying input voltage. Next, a small-scale solar battery was charged to validate the feasibility of the performance of the proposed VDBC circuit. The proposed circuit achieved a maximum output voltage of 11.7 Vdc with an output power of 1.37 mW. In addition, the rectified voltage waveform is stable due to the sminimisation of the ripples. In addition, the performance of VDBC circuit was verified by comparing the achieved results with previously published circuits in the literature. The results show that the proposed VDBC circuit outperformed existing units as described in the literature regarding output voltage and power. The developed rectifier circuit is suitable for various real-life applications such as energy harvesting and battery charging.

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Diaz, J., F. Nuno, J. M. Lopera e J. A. martinramos. "A New Control Strategy for an AC/DC Converter Based on a Piezoelectric Transformer". IEEE Transactions on Industrial Electronics 51, n. 4 (agosto 2004): 850–56. http://dx.doi.org/10.1109/tie.2004.831739.

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49

Hermawati, Hermawati, Caroline, Ike Bayusari, Rahmawati e Destri Mutiara. "Rancang Bangun Prototipe Speed Bump (Polisi Tidur) Memanfaatkan Piezoelectric PZT (Publum Zirconat Titanate) Dengan Mengaplikasikan Boost Converter". Jurnal Rekayasa Elektro Sriwijaya 5, n. 1 (9 novembre 2023): 49–57. http://dx.doi.org/10.36706/jres.v5i1.94.

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Energi listrik adalah hal yang paling dibutuhkan dalam kehidupan sehari-hari, sehingga manusia mencoba menemukan solusi dengan menciptakan alat penghasil energi listrik alternatif selain dari sumber bahan bakar. Salah satu contohnya ialah dengan memanfaatkan pijakan atau tekanan sepeda motor pada speed bump (polisi tidur) yang dapat diubah menjadi energi listrik dengan menggunakan tranduser berupa piezoelectric PZT. Piezoelectric menghasilkan daya yang rendah, maka dari itu penulis menambahkan atau mengaplikasikan boost converter yang berfungsi sebagai step up atau penaik tegangan dengan rangkaian prototipe dirangkai secara seri kemudian membandingkan keluaran berupa tegangan, arus dan daya tanpa boost converter dan menggunakan boost converter. Keluaran dari prototipe berupa tegangan dan arus AC yang akan dikonversikan menjadi tegangan dan arus DC dengan menggunakan dioda bridge. Berdasarkan hasil pengukuran dan perhitungan menggunakan 6 jenis berat total berupa gabungan berat sepeda motor dan berat badan pengendara menghasilkan keluaran terbesar yang berasal dari rangkaian menggunakan boost converter pada berat total 170 Kg dengan tegangan 5,31 V dan arus 0,32 mA, sehingga daya yang dihasilkan sebesar 13,535×10-4 Watt. Dan dapat disimpulkan bahwa keluaran yang dihasilkan berbanding lurus dengan berat dari sepeda motor dan berat pengendara.

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Kurt, Erol, Davut Özhan, Nicu Bizon e Jose Manuel Lopez-Guede. "Design and Implementation of a Maximum Power Point Tracking System for a Piezoelectric Wind Energy Harvester Generating High Harmonicity". Sustainability 13, n. 14 (9 luglio 2021): 7709. http://dx.doi.org/10.3390/su13147709.

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In this work, a maximum power point tracking (MPPT) system for its application to a new piezoelectric wind energy harvester (PWEH) has been designed and implemented. The motivation for such MPPT unit comes from the power scales of the piezoelectric layers being in the order of μW. In addition, the output generates highly disturbed voltage waveforms with high total harmonic distortion (THD), thereby high THD values cause a certain power loss at the output of the PWEH system and an intense motivation is given to design and implement the system. The proposed MPPT system is widely used for many different harvesting studies, however, in this paper it has been used at the first time for such a distorted waveform to our best knowledge. The MPPT consists of a rectifier unit storing the rectified energy into a capacitor with a certain voltage called VOC (i.e., the open circuit voltage of the harvester), then a dc-dc converter is used with the help of the MPPT unit using the half of VOC as the critical value for the performance of the control. It has been demonstrated that the power loss is nearly half of the power for the MPPT-free system, the efficiency has been increased with a rate of 98% and power consumption is measured as low as 5.29 μW.

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