• 2022-06-17
    已知一台三相 四极异步 电动机 的额 定 数据 为[tex=14.0x1.214]HHnTh5nn7Ug1KaeZ2RDw+kpru2FbKr21LXRHtBBkH5Usm2hsQhc9G5Xnu4n7HkgI6FGxLdtcCPoCOLBaAh8apg==[/tex]定子为[tex=0.643x1.0]jDVSpgNhHe+VJmgvx3gg1Q==[/tex]接, 额定运行时, 定子铜耗[tex=5.071x1.214]R66Ot9GOMbCGB3urAQr8Wr//qRbyUDjDBBh2MMu4BaE=[/tex]转子铜耗[tex=5.071x1.214]aAnzPxP2ZJDyypgGP4DAj7qtFRtWoX4hcFMxXkmMpJM=[/tex] 铁耗 [tex=4.786x1.214]Kl56BR1JUpkkXXPElHP98kTbtwtZhl8TJySMjM2GWUw=[/tex]机械损耗[tex=4.143x1.214]kySc90s9yIQdOVdVUaTNcg==[/tex]附加损耗 [tex=4.071x1.214]8qhh3qmfyxXUkWp95zMr4A==[/tex] 。 该电动机额定负载时, 求:额定转速;
  • 解   额定转速的计算。电磁功率[tex=15.857x5.357]qeiYnKXLEhyhuGRg8yLtrxCx3XL/diK+2VvByD3SeoQ8+Lj/KzW53CRkRFnRKDkNRoRQjJn5k9ao9edjMJk8vE999n3T8uf+pCzUFLSK1pXWPK720vuVb9vAUw7j316op1PE+rVMJ4EFv0bY5XPXj4n/U4cVXVN7PXkdpt3oY4sxw90MlUT25H7Aw+ao50305Iez2ukNXc4cGz5UQPoU57WD+ezruiMH5V5Ny/UCD38=[/tex]转差率[tex=7.643x1.357]p12tXNpVaKryfCwfvIWObSXOLsCUHIKw2r1oUs7ZhsY=[/tex]额定转速[tex=10.143x1.357]yxCm+W5+VLLKMYd/AmyXPwvmuSV6a1OPo7RqGNVICuM=[/tex]

    举一反三

    内容

    • 0

      已知一台三相异步电动机的数据为[tex=10.857x1.214]5TfkKsPeDHSo9n9sveOj9nMkx3KZxNXCpfPWHsLiU3UkWZ6DlDug7ZhnWylEyagN[/tex]定子三角形联结,[tex=0.5x1.0]2IRxdDa5OUp8cccgqlpdUA==[/tex] 极, [tex=8.143x1.214]6bekuxkBDZI8ShPCAqOYpurNPQxAkS8nvgViteQd1gY=[/tex] 。 额定运行时 , 定子铜损耗[tex=5.214x1.214]3O5E5NH+By0iM4A90hfHmLG3KNwAyzajtvw+tCfn8B0=[/tex] 转子铜损耗[tex=5.214x1.214]GUjSxen6xFwadRSHNKWQxnJ39SEEeee3vqZccwHSxrI=[/tex]铁损耗 [tex=4.929x1.214]U2EueaJbHcgDJgRYc0OzVenr/AMD5S1dJ3/bInGcsQI=[/tex] 机械损耗 [tex=5.429x1.214]zFrbyRAjrtDfN4STotF7tO9thUtBQsG8XwvBr3U4Cb0=[/tex] 附加损耗[tex=4.214x1.214]s6nJEaEr430S27ihF7nQGUx/FHxkXbpz8GQi40zwSF0=[/tex] 。试求:空载转矩[tex=1.214x1.214]C87kIpP5Pd9ImwDhY7Q0dg==[/tex]

    • 1

      一台三相 4 极异步电动机, [tex=4.5x1.214]UynVslLAt0xWs1rPlUFf5g==[/tex], 定子[tex=0.643x1.0]jDVSpgNhHe+VJmgvx3gg1Q==[/tex]接法, [tex=5.286x1.214]MObqc8X9H5kxwQwogQ/q7sHvCZBLJy07y4iF5B+pu4c=[/tex] (滞后), [tex=13.143x1.429]Gvs2ocstQPONMk/zASKbIUTpiaiU4hd8KndP9ETg1rw4acQ4bnV1JfZEcoLBBQmFYun6J/NZP9QyyOIuOSq0bw==[/tex], 机械损耗和附加损耗之和为[tex=2.5x1.0]5jDgKm6bjkltVWm5hQAs1A==[/tex], 设 [tex=6.214x1.429]jqdh+qXWcF2fViNHJd8LL2GRqPl14bfLOR02xauWP7bXfaEyAdztqqnHPQ3O4t/G[/tex], 试求:额定运行时的电磁转矩和输出转矩。

    • 2

      一台三相四极异步电动机的额定输出功率为:[tex=5.714x1.286]a17Th80xqFqcRzxA2NNO4zdMwo7XXr1mZz0SsTz0t40=[/tex],Y形联结,定子额定线电压[tex=5.357x1.286]3F7H3OUZ4VQyPsGp58Ihat/RKmWTr5HL220tP/CZREw=[/tex],额定负载时测得转子铜耗[tex=6.643x1.286]BF1ClB03Teydn+idKPISaqj3VbFtiEssVj44ayI6cpg=[/tex],机械损耗[tex=5.714x1.286]aBA/XpXTuJmJISLp/E2+BllNcoHn9S4qIojUYJZ9bIQ=[/tex],附加损耗[tex=4.357x1.286]Tes0npFr0EH68PLazlBbnMB08OiIy+dKo3JphcN7his=[/tex]。其他参数为:[tex=7.286x1.286]yVRypMAnHVZWhjdvmh4JjIQUhGpTUX9Mpq8hL8vLerCVxkbeO6v9SAbE2pP0/Kg4[/tex],[tex=7.0x1.286]uTQ/dlqteBVxocHdOGEP6EwzOSlkMCp1PnsU9REfHZA=[/tex]。求:额定条件下工作时的[tex=1.714x1.286]Q3q8VfIx7QPm7ECw4JvdDA==[/tex]、[tex=1.214x1.286]bWCAuAZSCf0S8K//j6ISTQ==[/tex]、[tex=1.286x1.286]X+rmW01+265o68w2H/cgBA==[/tex]、[tex=1.286x1.286]rsZz31KjmX1wRFpxEeFg7g==[/tex]。

    • 3

      set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为? A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}

    • 4

      判断下列命题是否为真:(1)[tex=3.643x1.357]/5abqJjwKZ1qr+6hsVFF5EBvfq3ggOFNlHMClz0h9nk=[/tex](2)[tex=2.929x1.357]rGJpyjIjJpbcoBTWxP0Jiw==[/tex](3)[tex=4.5x1.357]2wycHMoqU83MyEp17iBils58bR7YLuCTI2G9NVAdlfY=[/tex](4)[tex=5.214x1.357]CTz2gu+IIm1GgNmYMGaduCRtA41wnW4WqwRWwEhq6aA=[/tex](5)[tex=4.857x1.357]1DcE2BMMOaZhTuxR/mjgsboXxfg5ET59Dp4I/jjEDuw=[/tex](6)[tex=4.643x1.357]BSryrsQYOvTP2hTWRu6t4nAuJwlSs4L9jaq70EpB+Us=[/tex](7)若[tex=6.0x1.357]y0IZLUnBO88nR8WBZYvd7QXv5S1OMINV5cQNzPyiyAc=[/tex],则[tex=3.429x1.357]1brfPwTkVVIX4GfoMIUskA==[/tex](8)若[tex=7.643x1.357]MhLfJXZnhbXiB0x3oNtFzThV4Y1mJxe1VYr7PkJE/T6hmTD3WWp+UxbNwvUQ6DHk[/tex],则[tex=4.143x1.357]LZUA94ISo1po5HWsOVeBCjo0rMvj7uw3bGw5HiZenrI=[/tex]