shows the implementation of a novel control scheme DC-DC converter. The converter is a phase-shifted full-bridge PWM converter that is designed to operate as a front stage of a power conversion system where the input is a variable low voltage high current source. The converter is designed to step-up the low voltage input to an acceptable level that can be inverted to a 120/240 VAC 60Hz voltage for residential power. A DSP based adaptive control model is developed‚ taking into account line variations
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31‚ 32‚ 44) 1. A proton beam in an accelerator carries a current of 125 A. If the beam is incident on a target‚ how many protons strike the target in a period of 23.0 s? 2. A copper wire has a circular cross section with a radius of 1.25 mm. (a) If the wire carries a current of 3.70 A‚ find the drift speed of the electrons in this wire. 3. An aluminum wire having a cross-sectional area equal to 4.00 10–6 m2 carries a current of 5.00 A. The density of aluminum is 2.70 g/cm3. Assume each
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Investigation Calvin Chang 8.2 Stage 1: Planning the Experiment Introduction ! By “electric current”‚ I mean by the rate at which electric charges moves through a circuit‚ the electric charges can either be ions or electrons. They are measured in ammeters and the unit that is measured in is ampere which is the number of charges that passes through per second. There are many factors which would affect the electric current‚ like the voltage of the battery‚ the type of wire you are using‚ how long the circuit
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in the direction of increased vulnerability. The first sign of such a possible transition is the emergence of a deficit on the current account of India’s balance of payments in recent times. As Chart 2 shows‚ after three consecutive years of a current account surplus‚ which exceeded $10.5 billion in 2003-04‚ the country experienced a return to a current account deficit amounting to $6.3 billion in 2004-05. That this was not a short-term tendency is reflected in the balance of payments
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story about Nikola Tesla is the story of a genius who was largely disrespected and abused by other scientists and inventors. Through my research I have managed to find out about the forgotten genius‚ his creation‚ the competition against direct current‚ and his true predictions. Furthermore‚ I talk about why this unfortunate futurist did not receive the prestige for his work; yet‚ considered the best scientist of all times. WORKS OF NIKOLA TESLA The astonishing inventor‚ Nikola Tesla
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supply is a device that supplies electric power to an electrical load. The term is most commonly applied to electric power converters that convert one form of electrical energy to another. An AC-DC power supply converts alternating current (AC) into the direct current (DC). In general most consumer electronic devices such as desktop computer‚ mobile phone require a low DC power source. In practical field DC power for electronic devices is most conveniently obtained from commercial AC lines by using
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1. What can the historical income statements (case Exhibit 1) and balance sheets (case Exhibit 2) tell you about the financial health and current condition of Krispy Kreme Doughnuts‚ Inc.? In Exhibit 1‚ the income statement it is easiest to examine the financial health of Krispy Kreme Doughnuts‚ Inc. by using their net income. Net income is the most commonly used indicator to show a company’s profitability. In January of 2000‚ their net income was 5‚956 (thousands) and in August of 2004 it was
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electrical current‚ which is measured in a unit called amperes (also called amps for short). Electrical current cannot just flow on its own; it needs something to "push" it. Voltage (also referred to as electric potential) is what pushes electrical current through wires. Voltage is measured in volts‚ and the symbol for volts is V. The general purpose is to determine the voltage of a potato; with this experiment we intend to answer the following questions: 1. How much voltage and/or current does it
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capacity utilization system of the firm. 1.3 CONCEPT OF STUDY Introduction : Working capital is concerned with the problems that arise in attempting to manage the current assets‚ the current liabilities and the interrelationship that exists between them. Every firm tries to achieve financial stability. It can be repay its current outstanding debts from the income currently collected from its customer and meet future debts from future income. In addition‚ it must
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1. INTRODUCTION Energy plays an important role in human activities. The utilization of fossil fuel based energy resources has increased the impact on the global environmental issues such as CO2 emissions that contribute to global warming and a drastic climate changing. The need of exploitation of new sources such as renewable energy (RE) becomes crucial. The combination of multi-source renewable energies at the distribution stage and the proper energy management will definitely reducing the cost
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