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88 articles for “Power Supply”
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Research ArticleOpen accessIn the abstractElectromagnetic Interference Mitigation for Inverter fed AC DrivesC. Karthikeyan, K. DuraiswamyProblem statement: In switched mode PWM inverter EMI noise occurs during high (dv/dt) transient period. This EMI noise is mitigated using Active Common mode EMI filter in front of the source. Approach: This study proposes a new active common mode Electromagnetic Interference (EMI) filter for switched mode PWM Inverter applications. The proposed filter is based on current sensing and compensation … …American Journal of Applied Sciences, Vol. 8, Issue 10 · 12 Sep 2011 · 7,313 accessesView PDFCite
Research ArticleOpen accessIn the abstractVoltage Swells Improvement in Low Voltage Network Using Dynamic Voltage RestorerR. Omar, N.A. Rahim, A. AhmadProblem statement: Voltage disturbances are the most common power quality problem due to the increased use of a large numbers of sophisticated electronic equipment in industrial distribution system. The voltage disturbances such as voltage sags, swells, harmonics, unbalance and flickers. High quality in the power supply is needed, since failures due to such disturbances usually have a high impact on … …American Journal of Applied Sciences, Vol. 8, Issue 1 · 31 Jan 2011 · 7,379 accessesView PDFCite
Research ArticleOpen accessIn the abstractDesign of Capacitance to Voltage Converter for Capacitive Sensor TransducerA.H.M. Zahirul Alam, Nurul Arfah, Sheroz Khan, Md. Rafiqul IslamProblem statement: The design of Capacitance to Voltage Converter (CVC) for capacitive sensor transducer was presented. The proposed design will reduce the size, power consumption and supply voltage of the circuit and can be used in high frequency band transducer. Approach: The design was implemented using the Operational amplifier (Op amp) and capacitive network. The circuit was simulated using the … …American Journal of Applied Sciences, Vol. 7, Issue 10 · 31 Oct 2010 · 8,445 accessesView PDFCite
Research ArticleOpen accessIn the abstractEnergy Option for Small Scale Cashew Nut Processing in IndiaAtul Mohod, Sudhir Jain, A.G. PowarProblem statement: Cashew (Anacardium Occidentale L.) is one of the important tropical crops. India processed about 11,80,000 metric tons of raw cashew nut seeds through 3650 cashew processing industries scattered in many states of country. The cashew nut processing industries are typically located in the rural and backward areas. The most significant difficulty in processing cashew nuts is that the … …Energy Research Journal, Vol. 1, Issue 1 · 30 Jun 2010 · 16,080 accessesView PDFCite
Research ArticleOpen accessIn the abstractIntegrating Renewable and Nonrenewable Energies in Power Plant PlanningHabib H. Al-Ali, Yousef Saif, Ali Elkamel, Ali LohiProblem statement: Electricity can be generated from different type of technologies such as fossil and non-fossil power plants. Among these technologies, coal-fired power plants have been a major route for electricity generation. Recently, environmental constraints were imposed over the coal power plant operations in order to reduce their emissions. Besides, renewable energy power plants such as hydroelectric, wind, solar and … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 2 · 30 Jun 2010 · 7,811 accessesView PDFCite
Research ArticleOpen accessIn the abstractAnalysis of Abnormal Modes of Hoisting DC Electric Drive SystemKosmas ZdrozisProblem statement: Host number of publications in which special attention was given to the behavior of the hoisting drives in abnormal modes was found. The effect of the failure of the main power supply on the electrical and mechanical parts of the hoisting drive when the motor is operating in the regenerative braking mode was not enough studied. Approach: In … …American Journal of Applied Sciences, Vol. 7, Issue 4 · 30 Apr 2010 · 7,248 accessesView PDFCite
Research ArticleOpen accessIn the abstractDevelopment of a "Programmable Logic Controller Circuitry" For Optimal Power Distribution in a Manufacturing IndustriesK. SelvarajProblem statement: In industries the powder demand/consumption is fixed by the power supply agency. However, at times, the demand/Consumption may exceed the fixed level and will result in, the industry paying heavy penalties to the supply agency. In most of the large and medium scale industries, controlling of power consumption is done by monitoring the powder demand indicator unit activated … …Journal of Computer Science, Vol. 6, Issue 3 · 31 Mar 2010 · 7,279 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Novel Low-Power CMOS Operational Amplifier with High Slew Rate and High Common-Mode Rejection RatioIsmail Nabhan, Moussa AbdallahProblem statement: High speed operational amplifier is always an on-going research topic since major high speed application are needed. Approach: A two-stage operational amplifier (op amp) is designed, simulated and fabricated using a UMC 0.5 μm 2P2M CMOS technology. Results: This chip includes a compensation technique to ensure stability and zero systematic input-offset-voltage. The fabricated chip achieves a 84 dB … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 1 · 31 Mar 2010 · 8,241 accessesView PDFCite
Research ArticleOpen accessIn the abstractLow Power Phase Locked Loop Frequency Synthesizer for 2.4 GHz Band ZigbeeNesreen Mahmoud Hammam Ismail, Masuri OthmanProblem statement: Wireless communication systems are required for many applications. There are different standards for these systems. IEEE 802.15.4 defines the communication system standard for zigbee. This study discussed designing one of the blocks of zigbee transceiver which is the Phase Locked Loop (PLL). A major target for any communication systems is saving battery power, especially for zigbee as it … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 2 · 30 Jun 2009 · 8,061 accessesView PDFCite
Research ArticleOpen accessIn the abstractAn Assessment of the Electric Power Quality and Electrical Installation Impacts on Medical Electrical Equipment Operations at Health Care FacilitiesMário César Giacco Ramos, Carlos Márcio Vieira TahanProblem statement: Medical electrical equipments at health care facilities presented malfunction and wrong medical information due to poor electric power quality and to inadequate electrical Installations. Some equipment such as X-ray, computerized axial tomography and magnetic resonance imaging are considered as polluting ones due to their high amount of harmonics and voltage transients produced on the electrical power supply when … …American Journal of Applied Sciences, Vol. 6, Issue 4 · 30 Apr 2009 · 7,517 accessesView PDFCite