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当前学科:高级维修电工
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一台他励直流电动机,UN=110V,IN=234A,电枢回路总电阻R=0.04Ω,忽略电枢反应的影响,计算①采用直接起动时,起动电流Ist是额定电流IN的多少倍?②如限制起动电流为2IN,则电枢回路应串入多大的起动电阻Rs?
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