scholarly journals The Analysis and Design of a High Efficiency Piezoelectric Harvesting Floor with Impacting Force Mechanism

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 380
Author(s):  
Sheng-He Wang ◽  
Mi-Ching Tsai ◽  
Tsung-His Wu
Keyword(s):  
Theoretical Model ◽  
Free Vibration ◽  
High Efficiency ◽  
Electric Energy ◽  
Voltage Source ◽  
Storage Capacitor ◽  
Analysis And Design ◽  
Wireless Transmitter ◽  
Potential Development ◽  
Compact Size

In renewable energy technology development, piezoelectric material has electro-mechanical converted capability and the advantages of simple construction and compact size, it has potential development since the environment vibration can be transferred into an electrical energy in daily harvesting applications. To improve the electro-mechanical converted efficiency of a piezoelectric harvester at low-frequency environment, a free vibration type of piezoelectric cantilever harvesting structure was proposed, which can generate a resonant oscillation by releasing an initial deformed displacement, and was uninfluenced from the effects of external environment. To analyze the harvesting behaviors, an equivalent circuit with voltage source was provided, and the parameters in theoretical model can be determined by the dimensions of the piezoelectric unimorph plate and its initial deformation. From the comparison of measurement and simulation, it reveals a significant efficient theoretical model where 8% error occurrence for storage energy was found. Finally, the proposed free-vibration generation method was developed in a piezoelectric harvesting floor design, which can transfer human walking motion into electric energy, and store in an external storage capacitor. From the testing result, one time of footstep motion can cause the charging energy in a 33 μF of storage capacitor achieve to 0.278 mJ, which was larger than the driven power of the wireless transmitter module, and then the wireless transmitter can be driven to send a RF signal without external power supply. Therefore, the designed piezoelectric harvesting floor has potential development to locate the user’s current position, which can provide users with future appropriate service for intelligent building application.

A Piezoelectric Regenerative Damper for Low-Frequency Application

2014 ◽  
Author(s):  
Arata Masuda ◽  
Yasuhiro Hiraki ◽  
Koki Yamane ◽  
Akira Sone
Keyword(s):  
Free Vibration ◽  
High Efficiency ◽  
Vibration Suppression ◽  
Mechanical Energy ◽  
Electric Energy ◽  
Low Frequency ◽  
Offshore Structures ◽  
Circuit Switching ◽  
Piezoelectric Cantilever ◽  
Input Motion

In this study, a design of a regenerative damper for low-frequency applications, such as vibration suppression of long period infrastructures, tanks and pipings, and maritime and offshore structures, is presented. In this design, the low-frequency input motion to the damper is transformed to a high-frequency motion of piezoelectric cantilever oscillators by mechanical switching, so that the input work into the damper during the loading phase induces the free vibration of the oscillator. The mechanical energy of the free vibration is converted to the electric energy by a high efficiency interfacing circuit. In this paper, a conceptual model is mathematically formulated and tested to evaluate the potential performance of the proposed idea. It is shown that the combination of the mechanical switching with a circuit switching interface technique can expect the enhancement of the energy regeneration efficiency up to 30%.

scholarly journals Analysis of Efficient FPGA Based Pid Controller For Dc-Dc Buck Boost Converter Using Hardware Co-Simulation Setup

2021 ◽  
Vol 4 (2) ◽  
pp. 33-39
Author(s):  
Waqar Ahmed ◽  
Shafquat Hussain ◽  
Ahmed Muddassir Khan ◽  
Rizwan Ali
Keyword(s):  
Response Time ◽  
Pid Controller ◽  
High Efficiency ◽  
Fast Response ◽  
Poor Quality ◽  
Boost Converter ◽  
Voltage Source ◽  
Compact Size ◽  
Power Stage ◽  
Low Efficiency

Converters are widely used in smart grid applications where multilevel dc voltage source are required in a system. There are few critical challenges in existing converters such as low efficiency, slow response time, large circuit size due to more number of switches subsequently poor quality of PWM signal. Moreover, a separate converter is required for each source used in the circuit. In this work, we proposed and analyse an efficient FPGA based PID controller using Hardware Co-simulation for DC-DC Buck Boost Converter. We have successfully integrated two different sources of energy which are being fed to the power stage. The control of this converter topology is implemented by using FPGA kits Virtex5 and Virtex7. Furthermore, efficiency of both kits is compared and analysed. The proposed converter has high efficiency, fast response time and compact size due to least number of switches as compared to conventional topology of such converters.

A 20-mV Input DC/DC Converter for Energy Harvesting Applications

2015 ◽  
Vol 24 (05) ◽  
pp. 1550070 ◽  
Author(s):  
Zheng Yang ◽  
Jingmin Wang ◽  
Yani Li ◽  
Yintang Yang
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Power Management ◽  
High Efficiency ◽  
Low Power Design ◽  
Input Voltage ◽  
Voltage Source ◽  
Storage Capacitor ◽  
Cmos Process ◽  
Low Input

A low input step-up DC/DC converter and power manager in 0.18-μm CMOS process is presented. The proposed converter can work with the input voltage as low as 20 mV. The extremely low input voltage makes it suitable for energy harvesting and power management. Four logic controlled outputs provide the best voltage for various applications to accommodate low power design requirements. A low current low dropout regulator (LDO) is utilized to provide a regulated 2.2 V output for powering low power processors or other low power integrated circuit (ICs). Reserve energy on the storage capacitor CSTORE provides power when the input voltage source is unavailable, thus prolongs the life of the system and expands the application range. Extremely low quiescent current (6 μA) and high efficiency design (64%@300 μA load current) ensure the fastest possible charge times of the output reservoir capacitor. This work provides a complete power management solution for wireless sensing and data acquisition.

ENERGY FLOW CONTROL BETWEEN STATIC SERIES COMPENSATOR AND DISTRIBUTION SYSTEMS

2004 ◽  
Vol 13 (04) ◽  
pp. 901-918 ◽  
Author(s):  
HILMY AWAD ◽  
JAN SVENSSON ◽  
MATH H. J. BOLLEN
Keyword(s):  
Distribution System ◽  
Energy Flow ◽  
Distribution Systems ◽  
Electric Energy ◽  
Voltage Source ◽  
Storage Capacitor ◽  
Voltage Source Converter ◽  
Control Techniques ◽  
Design Guide ◽  
Grid Side

By proper control algorithms, the energy flow between the static series compensator (SSC) and the distribution system can be fully controlled. This paper proposes and describes two control techniques to exchange electric energy between the energy storage capacitor (ESC) of the SSC and the utility. The first is based on using a shunt diode rectifier, which is placed either on the load side or the grid side (both configurations are studied). The other exploits the voltage source converter of the SSC to charge its the ESC. A design guide for the dc-capacitor is given. The proposed techniques are validated by PSCAD/EMTDC simulation.

Smart DRA for beam width and orientation control

Frequenz ◽  
2020 ◽  
Vol 74 (11-12) ◽  
pp. 383-392
Author(s):  
Rajveer S. Yaduvanshi ◽  
Richa Gupta ◽  
Saurabh Katiyar
Keyword(s):  
Radiation Pattern ◽  
High Efficiency ◽  
Beam Width ◽  
Beam Control ◽  
Design Flexibility ◽  
Compact Size ◽  
Close Proximity ◽  
Cellular Communication Network ◽  
Arc Shape ◽  
Broadside Radiation

AbstractSmartdielectric resonator antenna (DRA) having beam control mechanism is anew area to be explored by antenna researchers. Proposed new geometry DRA has low loss, design flexibility, high efficiency, compact size and desired radiated beam control. Developing beam control in new geometry DRAs is investigated for the first time in this letter. Unique technique for beam control and beam width control is proposed using pit top and mount top DRA. Gain is controlled from 5.0 to 9.98 dBi and beam is controlled from ±30° to ±70° in broadside radiation pattern. U shape pit DRA has maximum directive gain of 9.98 dBi and efficiency 98% at 5.8 GHz frequency. Measured and simulated results of radiation pattern and reflection coefficient are found to be in close proximity. Hardware of U shape pit top DRA, mount top DRA, left side arc top DRA, right side arc shape top DRA is developed and investigated. Mobile and cellular communication network need wide coverage, hence large beam width is required. Narrowing of beam width at higher order mode is also achieved.

The Analysis and Design of Electric Cooker

2014 ◽  
Vol 1052 ◽  
pp. 543-546
Author(s):  
Hong Yan Jin ◽  
Zhi Wei Zhu
Keyword(s):  
High Efficiency ◽  
Analysis And Design ◽  
New Material ◽  
User Friendly

Electric rice cooker is now almost each family essential kitchen supplies, so using the combination of the traditional materials with modern new material in the material, which is more safe and reliable, high efficiency; in view of novel, unique, broke dull and monotonous traditional electric rice cooker, can meet the needs of different groups; in the structure is also improved the humanized design, two gap next to the inside of the aluminum easier extraction. This design in a safe, practical, personalized, user-friendly products experience.

Analysis and design of a microstrip patch antenna for harmonic tuning in a high-efficiency integrated microwave transmitter

2007 ◽  
Author(s):  
Paolo Baccarelli ◽  
Paolo Burghignoli ◽  
Fabrizio Frezza ◽  
Alessandro Galli ◽  
Paolo Lampariello ◽  
...  
Keyword(s):  
Patch Antenna ◽  
High Efficiency ◽  
Microstrip Patch Antenna ◽  
Analysis And Design ◽  
Microstrip Patch
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