A DC motor is a mechanically commutated electric motor powered from direct current (DC). The stator is stationary in space by definition and therefore so is its current. The current in the rotor is switched by the commutator to also be stationary in space. This is how the relative angle between the stator and rotor magnetic flux is maintained near 90 degrees‚ which generates the maximum torque. DC motors have a rotating armature winding but non-rotating armature magnetic field and a static field
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DC to AC Inverter Assignment # 2/ Spring 2013 CE721 Ahmad Ghaffari‚ 1203840 Submit Date: Tuesday 19‚ 2013 Abstract DC-AC inverter is a device that converts a direct current (DC) into an alternating current (AC). When there is no AC main power for applications in caravans‚ remote area and etc.‚ this tool is very suitable to use. It mainly converts a DC source (like a car’s battery) to an AC source (230V) to use for power application like
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5th February 2nd‚ 2015 2013 Q1 Monument Synthesis Throughout time monuments serve to provide a physical representation of emotional events or a person in order to unify the citizens. When devising a monument‚ one must regard three critical factors; the location‚ the materials‚ and the size. All three of these must be implemented to obtain optimum success in its commemoration. The first element to consider stands as the location. The place of the monument establishes the impact to the people
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Maurice Aguirre Washington DC: Lobbying active in the United States Lobbying in America refers to paid activity on which distinctive interests retain the services of well-connected experienced advocates‚ typically lawyers‚ to argue for focused regulations in decision making bodies for example the United States Congress. It’s just a highly provocative phenomenon‚ usually seen in a negative light by reporters and the US public. Even while lobbying is certainly theme to thorough plus typically
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Slavic 151 Herscher 12/17/12 Nick Rakic Term Paper Pride and Inat Form a Counter Monument What is the first thing you think of when you see a skull? It is usually not a happy thought. The usual thoughts are scary. The connotations usually associated with skulls are death‚ gloom‚ and despair. If a person were to see a skull they would most likely get freaked out. Seeing a skull means that someone has died. If someone were to go outside on Halloween while children are
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Red Fort‚ Delhi The Red Fort‚ with a circumference of over 2.2 kilometers‚ was laid out by the banks of the Yamuna river in the 17th century. The Mughal emperor Shajahan built it with the ambition of concentrating the Mughal power in one monument. Monument is perhaps not the right word. A mini-city is more like it. Unfortunately for the emperor‚ before he could move his capital from Agra to Shahjahanabad in Delhi‚ he was taken a political prisoner by his son Aurangazeb. The fort is a delight
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Historical Monuments When thinking about architecture‚ many visual images come to mind. The works of many are seen everywhere we go‚ from the average home to a New York skyscraper. As these buildings are fairly common to most of us‚ we forget to incorporate the work of our prehistoric man that gave us the foundation of early architecture. Pre-historic monuments provide us with numerous amounts information about our past and how life existed in these prehistoric times. When comparing two great
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| | | | | | | DC Motors | | | | | | | | | | | | | The direct current (DC) motor is one of the first machines devised to convert electrical power into mechanical power. Permanent magnet (PM) direct current converts electrical energy into mechanical energy through the interaction of two magnetic fields. One field is produced by a permanent magnet assembly; the other field is produced by an electrical current flowing in the motor windings. These two fields result in a torque
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Types of DC Motors and DC Generators MOTORS – convert electrical energy to mechanical energy Motors and generators are the most frequent used electrical machines. ❖ Generators action can take place when and only when‚ there is a relative motion between conducting wires and magnetic lines of force. ❖ Electric motor is in operation when it is supplied with electrical energy and develops torque‚ that is‚ a tendency to produce rotation. ❖ In DC generator‚ the armature winding is mechanically
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Discussion 1: Tombs and Monuments Question: Compare an aspect of the tomb of Emperor Shihuangdi with the burial tombs of other cultures‚ such as Egypt or Mesopotamia. Answer: The Tomb of Emperor Shihuangdi The tomb of Qin Shihuangdi‚ who died 210 B.C.E.‚ lies about 30 kilometers from modern Xian in China. There is a pyramid shaped tumulus over the actual burial chamber which originally was 400 feet high and now stands 165 feet and has a circumference of about one mile. The mausoleum
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