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Design and Implementation of an Automatic Over/Undervoltage Protection System for Single-Phase Low Voltage Power Lines
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作者 Derek Ajesam Asoh Lizette Nange Chia 《Journal of Power and Energy Engineering》 2022年第8期12-25,共14页
Today, many industrial and domestic electronic appliances and equipment (devices) are exposed to power disturbances such as voltage variations of the AC mains supply which often lead to damage of the electronic device... Today, many industrial and domestic electronic appliances and equipment (devices) are exposed to power disturbances such as voltage variations of the AC mains supply which often lead to damage of the electronic devices. As these devices are quite sensitive to power disturbances, there is a need for a tripping system that can help avoid any damage to devices in use. The objective of this work is to build a system that monitors line voltage and protects appliances from unacceptable voltage variations. The system consists of a tripping mechanism that monitors the input voltage and trips according to the limits provided. An Arduino Uno microcontroller is used to determine the voltage level through a voltage divider circuit. The system’s novelty and innovation lie in its flexibility. It offers the user the ability to define different overvoltage and undervoltage threshold values depending on the specific appliances used in the household. In operation, the system displays the voltage state (overvoltage, normal voltage, overvoltage) and alerts the user by sending an SMS via a GSM modem. The system is valuable for industrial and domestic applications, especially in developing economies such as those of Sub-Saharan Africa, where overvoltage and undervoltage are acute problems. 展开更多
关键词 OVERVOLTAGE undervoltage Simulation Arduino Microcontroller Tripping Mechanism Sub-Saharan Africa
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Integration of GaN analog building blocks on p-GaN wafers for GaN ICs 被引量:1
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作者 Xiangdong Li Karen Geens +6 位作者 Nooshin Amirifar Ming Zhao Shuzhen You Niels Posthuma Hu Liang Guido Groeseneken Stefaan Decoutere 《Journal of Semiconductors》 EI CAS CSCD 2021年第2期113-116,共4页
We demonstrate the key module of comparators in GaN ICs,based on resistor-transistor logic(RTL)on E-mode wafers in this work.The fundamental inverters in the comparator consist of a p-GaN gate HEMT and a 2DEG resistor... We demonstrate the key module of comparators in GaN ICs,based on resistor-transistor logic(RTL)on E-mode wafers in this work.The fundamental inverters in the comparator consist of a p-GaN gate HEMT and a 2DEG resistor as the load.The function of the RTL comparators is finally verified by a undervoltage lockout(UVLO)circuit.The compatibility of this circuit with the current p-GaN technology paves the way for integrating logic ICs together with the power devices. 展开更多
关键词 P-GAN resistor-transistor logic(RTL) comparator undervoltage lockout(UVLO) GaN ICs
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