Titlebook: Electronic and Electrical Engineering; Principles and Pract L. A. A. Warnes Textbook 1994Latest edition Macmillan Publishers Limited 1994 a

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https://doi.org/10.1007/978-3-662-07924-9 do the converse. Usually a DC machine can serve either purpose. AC machines are more widely used than DC machines, but in certain applications DC machines used to be preferred, especially in traction and whenever speed control over a wide range was desired. With the development of high-power semico

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Nachfrage und Bedarfsvorhersagemilar systems were soon installed all over the world. AC generators began to be used for the same purpose and the two varieties of electricity supply coexisted for a time, with the advantage perhaps lying with DC generation. The invention by Tesla of the induction motor in 1887 altered the balance d

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Deterministisches Materialmanagementing voltages and also for matching loads. They range in size from multi-tonne, multi-MVA transformers in electricity distribution systems to IVA, PCB-mounted transformers for portable instruments. Besides their high efficiencies, they are also notable for their reliability and freedom from the need

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Nachfrage und Bedarfsvorhersagemotors running from the 240V supply are among the commonest in domestic use. All induction motors are cheap, reliable, rugged, lightweight and reasonably efficient; in fact large (> 1 MW) induction motors have efficiencies of up to 98%. Their biggest drawback hitherto has been their small range of o

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Konzepte für die Prozessindustrie, so that more complex logical expressions may be implemented, to enable us to control, say, a lift, a traffic light, or a computer. The devices have inputs and outputs each of which can only be in one of two states. Electrically, these states are usually a high-voltage state (often +5 V) and a low-

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Macmillan Publishers Limited 1994

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Circuit analysis, be modelled by simple elements that, when assembled into a circuit in the right way, can be analysed and so predict the machine’s behaviour. Accordingly, circuits are the foundation of any study of electrical or electronic engineering. We begin by defining simple circuit elements, then we shall inc

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