AC and DC voltage electrowetting on ferroelectric polymer for low voltage applications

2020 ◽  
Author(s):  
Pranjali Yedewar ◽  
Sandip Wadhai ◽  
Arun Banpurkar
Keyword(s):  
Low Voltage ◽  
Dc Voltage ◽  
Ferroelectric Polymer

scholarly journals Complex Electronic Protection for Low-voltage Three-phase Induction Motors

2020 ◽  
Vol 11 ◽  
pp. 11-17
Author(s):  
Gabriel Nicolae Popa ◽  
Corina Maria Diniș
Keyword(s):  
Induction Motors ◽  
Low Voltage ◽  
Short Circuit ◽  
Electronic Devices ◽  
General Purpose ◽  
Two Phase ◽  
Dc Voltage ◽  
Electric Drives ◽  
Normal Limits ◽  
Three Phase

Low-voltage three-phase induction motors are most often used in industrial electric drives. Electric motors must be protected by electric and/or electronic devices against: short-circuit, overloads, asymmetrical currents, two-phase voltage operation, under-voltage, and over-temperature. To design the electronic protection currents, voltages and temperature must be measured to determine whether they fall within normal limits. The electronic protection was design into low capacity PLC. The paper presents the designs and analysis of complex electronic protection for general purpose low-voltage three-phase induction motors. The electronic protection has Hall transducers and conversion electronic devices for AC currents to DC voltages, AC voltages to DC voltage, temperature to DC voltage, a low capacity PLC, switches, motor’s power contactors, and signalling lamps has been developed. Experiments with complex electronic protection, for different faults are presented. The proposed protection has the advantages of incorporating all usual protections future for the low-voltage three-phase induction motors.

scholarly journals PERFORMANCE EVALUATION OF VOLTAGE RECTIFIERS FOR ENERGY HARVESTING APPLICATIONS

2021 ◽  
Vol 16 (7) ◽  
Author(s):  
Atif Sardar Khan
Keyword(s):  
Energy Harvester ◽  
Low Voltage ◽  
Electronic Device ◽  
Maximum Power ◽  
Sensor Nodes ◽  
Portable Devices ◽  
Dc Voltage ◽  
Voltage Multiplier ◽  
Optimum Load ◽  
Voltage Output

Voltage multipliers are used to convert the low AC voltage output of energy harvesters into relatively high DC voltage for portable devices and wireless sensor nodes (WSNs) applications. DC voltage conversion is required to operate an electronic device or recharge battery. In order, to convert the low AC voltage output of the energy harvester into relatively high DC voltage, a voltage multiplier circuit need to be integrated with the energy harvester. In this study, a Prototype-1 (two-stages) and Prototype-2 (three-stage) Dickson voltage multipliers and Prototype-3 (seven-stage) Cockcroft-Walton voltage multiplier circuits are developed. The device is capable of converting a low voltage of 50 mV into 350 mV. The research focuses on the development and characterization of Prototype-1, Prototype-2 and Prototype-3 circuits. Results indicate that the determination of load resistance is important for better output power. The maximum power of 11.97 μW was obtained by prototype-3 elucidating better power compared to prototype-1 and prototype-2 and the power was obtained at an optimum load of 560 kΩ. Furthermore, a rectenna tested at different distances from the source, revealed that a prototype-2 produced a maximum power of 3.01 × 10 -6 μW, at an optimum load of 560 kΩ.

Analysis of SMPS in Clinical Medical Equipment

2014 ◽  
Vol 484-485 ◽  
pp. 671-673
Author(s):  
Jun Ying Zhou ◽  
Nan Zhang ◽  
Su Fang Kong ◽  
Fu Hua Zhang ◽  
Xiu Xian Guo
Keyword(s):  
Power Supply ◽  
Medical Equipment ◽  
High Efficiency ◽  
Low Voltage ◽  
Voltage Level ◽  
Switch Mode Power Supply ◽  
Voltage Range ◽  
Dc Voltage ◽  
Off Time ◽  
Switch Circuit

There exists low voltage in circuit of domestic and imported medical equipment and it is what we call power supply. In the past, equipment mainly uses transformer to step down the voltage of power supply. With the progress of science and technology, the technique is gradually replaced by SMPW (switch mode power supply) which is extensively applied to various types of medical equipment due to the high efficiency and wide voltage range. The mains power supply is rectified and filtered into a DC high voltage and then use the switch circuit and energy storage elements to convert them into a variety of required DC voltage output, output DC voltage level can be adjusted by changing the off time (namely Mark-Space Ratio) of switching circuit.

An Educational Platform for Cascade PWM STATCOM

2015 ◽  
Vol 719-720 ◽  
pp. 470-474
Author(s):  
Yan Jie Zhang ◽  
Zhi Heng Xu ◽  
Zhuang Zhuang Zheng ◽  
Ji Xin Wang ◽  
Yu Hai Liu
Keyword(s):  
Low Voltage ◽  
Power Grid ◽  
Training System ◽  
Dc Voltage ◽  
Load Disturbance ◽  
Imaginary Power ◽  
Voltage Balance ◽  
Balance Strategy ◽  
Star Configuration

This paper presents a training system based on low-voltage cascaded PWM STATCOM.It is intended to train the employee in power grid companies.The system is characterized by load disturbance in 380-V power grid and imaginary power compensation of transformerless cascade PWM STATCOM with star-configuration. A two-hierarchy DC voltage balance strategy is adopted to stabilize the H-bridge capacitors in the compensation procedure. Simulation and experimental waveform indicate that a 380V-20kvar cascade STATCOM with star-configuration compensate the the imaginary power shortage within 20ms.

High Performance Multi-Level Non-Volatile Polymer Memory with Solution-Blended Ferroelectric Polymer/High-kInsulators for Low Voltage Operation

2013 ◽  
Vol 23 (44) ◽  
pp. 5484-5493 ◽  
Author(s):  
Sun Kak Hwang ◽  
Insung Bae ◽  
Suk Man Cho ◽  
Richard Hahnkee Kim ◽  
Hee Joon Jung ◽  
...  
Keyword(s):  
High Performance ◽  
Low Voltage ◽  
Ferroelectric Polymer ◽  
Low Voltage Operation ◽  
Multi Level ◽  
Polymer Memory

Neoteric Hybrid Multilevel Cascade Inverter Based on Low Switch Numbers Along with Low Voltage Stress: Design, Analysis, Verification

2017 ◽  
Vol 8 (1) ◽  
pp. 92
Author(s):  
Rasool Esmailzadeh ◽  
A. Ajami ◽  
M.R. Banaei
Keyword(s):  
Power Systems ◽  
Output Voltage ◽  
High Performance ◽  
High Efficiency ◽  
Low Voltage ◽  
Maximum Output ◽  
Dc Voltage ◽  
Multilevel Inverters ◽  
Voltage Stress ◽  
Multi Level

Abstract: With the purpose of rein in the high voltage of flexible power systems, renovation and amendment of multi-level structures aimed at acquisition of high quality voltage is certainly required. In this regard, robust topology must be occupied that encompass the maximum output voltage levels along with minimum of switch number, of course, with taking into account of Peak Inverse Voltage (PIV). In this paper, a neoteric high-performance multilevel cascaded inverter is suggested up to the problem of repetitive output levels to be unraveled and also number of output voltage levels to be maximized. It has been constructed by series-connected multilevel inverters blocks and three-level inverter. The simulation results along with experimental results extracted by manufactured prototype have transparently approved high efficiency of proposed inverter as well as its feasibility. Apart from above, new mathematical approach has been presented to calculate and define the DC voltage sources magnitudes in asymmetric converter.

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