جستجوی مقالات مرتبط با کلیدواژه "driver" در نشریات گروه "برق"

In recent years, the Internet of Things (IoT) has emerged as a significant technology in the industrial and academic sectors, particularly in the context of the fourth-generation industry. Encouraging industries, including oil, gas, and electric power sectors to adopt IoT technology expeditiously is crucial due to its numerous advantages. This article focuses on the oil and gas and electric power industry, which is a vital sector in any country, and emphasizes the need for the accelerated implementation of IoT to unlock its potential benefits. Despite the potential of IoT to achieve important and innovative changes in oil, gas, and electric power industries, surveys indicate a slow adoption trend in Iran. Thus, this research aims to identify and model the drivers that influence the implementation of IoT in Iran's oil, gas, and electric power industry supply chain. The research consists of two stages: the identification of drivers through literature review and assessment using the Delphi method and the presentation of a model of drivers using fuzzy total interpretive structural modeling. The results, comprising 75 drivers categorized into 14 general categories, highlight "government regulations" as the most fundamental driver in Iran's oil, gas, and electric power industry supply chain.

Conventional Off-Line (50-60Hz) light emitting diode (LED) drivers usually need an electrolytic capacitor to reduce power imbalance between ac input and dc output, and to decrease the low-frequency component of the output ripple. However, electrolytic capacitor is the key component which limits the lifespan of LED driver. If a driver uses a pulsating output current, the electrolytic capacitor can be omitted. This paper proposes a high power factor LED driver with high frequency pulsating driving current, in which electrolytic capacitor has omitted from the topology. The driver has two outputs that allow the number of driving LEDs to increase, an LED string will be connected to each output and a single switch is used in series with each LED string, thus the number of switches is equal to the number of outputs. Output and Storage capacitor voltages are sensed and used to implement the control method to regulate the output current. Low cost and high efficiency can be obtained due to the power structure and the proposed control method. Simulations, calculations and experimental results are provided for the proposed circuit.