Chapter 4 DC to AC Conversion (INVERTER) • General concept • Basic principles/concepts • Single-phase inverter – Square wave – Notching – PWM • Harmonics • Modulation • Three-phase inverter DC to AC Converter (Inverter) • DEFINITION: Converts DC to AC power by switching the DC input voltage (or current) in a pre-determined sequence so as to generate AC voltage (or current) output. • TYPICAL APPLICATIONS: – Un-interruptible power supply (UPS)‚ Industrial (induction motor) drives‚ Traction
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VISHWAKARMA YOJNA A Project Report Submitted by UDAY TEJANI (100070109030) In fulfillment of the award of the degree Of BACHELOR OF ENGINEERING In ELECTRICAL ENGINEERING BVM Engineering College‚ Vallabh Vidhyanagar Gujarat Technological University‚ Ahmedabad December-2013 BVM Engineering College ELECTRICAL ENGINEERING DEPARTMENT Vishwakarma Yojana: Progress Report-I CERTIFICATE Date:11/12/2013 This is to certificate that the dissertation entitled “VISHWAKARMA YOJNA
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Power Supply Regulation DC-DC voltage converters are often used to provide a regulated voltage supply from an unregulated voltage source. Unregulated voltage sources can be rectified line voltages that exhibit fluctuations due to changes in magnitude. Regulated voltage supplies provide an average DC output voltage at a desired level (3.3 V‚ 2.5 V‚ etc.)‚ despite fluctuating input voltage sources and variable output loads. Factors to consider when deciding on a regulated voltage supply solution include:
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polarity of the output voltage is reverse to that of the input voltage‚ the converter will be in inverting mode also known as an inverting regulator Among all the types of the Buck and Boost circuits ‚ Buck Boost converter has good performance as it indicate a significant improvement in performance and efficiency by reducing the switching time between buck and boost modes. The circuit diagram of the Buck Boost converter is shown in Fig.
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Buck-Converter Design Demystified Stepdown (buck) switching converters are integral to modern electronics. They can convert a voltage source (typically 8 V to 25 V) into a lower regulated voltage (typically 0.5 V to 5 V). Stepdown converters transfer small packets of energy using a switch‚ a diode‚ an inductor and several capacitors. Though substantially larger and noisier than their linear-regulator counterparts‚ buck converters offer higher efficiency in most cases. Despite their widespread use
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jewelry‚ coinage‚ fuel cells‚ oil refining‚ polyester‚ photography‚ chemical uses‚ water treatment and many more areas Auto-catalysts are by-far the largest users of Palladium Automobile Industry and Palladium: Most automobiles use catalytic converters made from palladium. It is used as a catalyst for hydrogenation/dehydrogenation reactions and for petroleum cracking. Palladium provides cost advantages over platinum and it can handle higher temperatures‚ thus most automobile manufacturers use
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ABSTRACT The United States is dependent on imports of platinum-group metals (PGMs)‚ which includes platinum‚ palladium‚ rhodium‚ ruthenium‚ osmium‚ and iridium. PGMs are used in a wide variety of applications‚ including vehicle catalysts for controlling vehicle pollution‚ chemical catalysts and coatings‚ dental alloys‚ electronic components and computer hard discs‚ fuel cells for power generation‚ glassmaking equipment‚ investment coinage‚ jewelry‚ medicines‚ and petroleum catalysts for gasoline
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Abstract— In the conventional buck converter the supply current is discontinuous which may produce electromagnetic interference (EMI). In order to minimize the EMI problems an interleaved buck converter with continuous supply current has been introduced. Also due to the advantage of improved step-down conversion ratio‚ the interleaved buck converter can be used for high step-down and high frequency applications. The main features of the converter also include lower switch stress and lower output
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hydrocarbon (UBHC)‚ oxides of nitrogen (NOx) and Lead. An aqua silencer is an attempt mainly dealing with control of emission and noise. The noise and smoke level is considerably less than the conventional silencer‚ it is cheaper‚ no need of catalytic converter and easy to install. Table of Contents Acknowledgement.................................................................................................................................i Abstract...................................................
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Ways To Reduce The Effects of Pollution Nowadays‚ pollution has become a major issue that concerns all countries worldwide. Majority of the pollution are results of the selfish behaviour of humans. There are many types of pollutions‚ examples are water pollution and air pollution. Each of this pollution can be dealt with different methods depending on the source of the error. In general‚ both air and water pollution can be reduced by utilizing the modern technology that humans have developed
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