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Titlebook: Electronic and Electrical Engineering, Solutions Manual(S/M) second edition.; Lionel Warnes Textbook 1998Latest edition Macmillan Publishe

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21#
發(fā)表于 2025-3-25 07:14:06 | 只看該作者
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發(fā)表于 2025-3-25 15:41:50 | 只看該作者
Integrated Circuit Authenticationmounted transformers for portable instruments. Besides their high efficiencies, they are also notable for their reliability and freedom from the need for maintenance — virtues stemming from their lack of moving parts. AC became standard partly because transformers have these attractive properties, relegating DC to special purposes.
24#
發(fā)表于 2025-3-25 17:53:28 | 只看該作者
Alan F. Murray,H. Martin Reekiely efficient; in fact large (> 1 MW) induction motors have efficiencies of up to 98%. Their biggest drawback hitherto has been their small range of operating speeds, though this is changing with the introduction of solid-state, variable-frequency drives. Table 17.1 shows typical characteristics for a small and a large squirrel-cage motor.
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Stuart A. Anfang M.D.,Benjamin Liptzin M.D.gardless of the mode of excitation, what is indispensable in all electrical machines is relative motion of an electrical conductor and a magnetic field and we shall start by looking at a very simple example.
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