标准
发表于 2025-3-28 15:31:39
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现晕光
发表于 2025-3-28 20:06:56
Three-phase systems,milar 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
HUMP
发表于 2025-3-29 02:51:33
Transformers,ing 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
神圣在玷污
发表于 2025-3-29 03:06:10
Induction motors,motors 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
audiologist
发表于 2025-3-29 07:41:56
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heterodox
发表于 2025-3-29 11:32:54
Power electronics,devices such as SCRs became common in high-voltage traction motors as long as thirty years ago, it is only in the last ten years that the marriage of microprocessors and power devices has brought about a revolution in the control of electrical power. This revolution is especially noteworthy in elect
膝盖
发表于 2025-3-29 18:08:38
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生气的边缘
发表于 2025-3-29 22:57:41
pplications, which are emphasised throughout. Suitable for HND and undergraduate students, the coverage and approach is relevant for specialist and non-specialist engineers. Important topics include electromagnetic compatibility in view of recent EU legislation. Solutions to Problems book available
bromide
发表于 2025-3-30 00:15:34
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详细目录
发表于 2025-3-30 07:00:12
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