商谈
发表于 2025-4-1 02:20:44
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协定
发表于 2025-4-1 09:59:20
Erratum to: Berichtigungen zum I. Band,ly 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.
Engaged
发表于 2025-4-1 13:12:41
Wolfgang Gröbner,Nikolaus Hofreiterd-state devices depends on the way it is doped during manufacture. There are several classes of diode besides the ‘ordinary’ rectifier, but of these we shall examine only Schottky diodes, Zener diodes and light-emitting diodes. Optical signal source and detector diodes are discussed in Chapter 25.
FANG
发表于 2025-4-1 15:24:40
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我要沮丧
发表于 2025-4-1 20:25:54
https://doi.org/10.1007/978-3-642-94567-0mpared to single or two-phase AC systems.. By 1896 the Westinghouse company in the USA had settled exclusively for the three-phase system, partly because it gave smoother motor operation, and very gradually DC systems lapsed into obsolescence.