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【简答题】
A 440-V 50-Hz two-pole Y-connected induction motor is rated at 85 kW. The equivalent circuit parameters are R 1 = 0.105 Ω R 2 = 0.065 Ω X m = 7.9 Ω X 1 = 0.17 Ω X 2 = 0.17 Ω P F&W = 1.6 kW P misc = 150 kW P core = 1.1 kW For a slip of 0.05, find (a) The line current |I L | = ( 1 ) A (b) The stator power factor is ( 2 ) (c) The rotor power factor is ( 3 ) ( d) The stator copper losses P SCL = ( 4 ) W (e) The air-gap power P AG = ( 5 ) W (f) The power converted from electrical to mechanical form P conv = ( 6 ) W (g) The induced torque τ ind = ( 7 ) N.m (h ) The load torque τ load = ( 8 ) N.m ( i ) The overall machine efficiency η= ( 9 ) %
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举一反三
【单选题】下斜肌的拮抗肌是
A.
外直肌
B.
内直肌
C.
上斜肌
D.
下斜肌
【单选题】上斜肌的拮抗肌是
A.
外直肌
B.
内直肌
C.
上斜肌
D.
下斜肌
【单选题】内直肌的拮抗肌是:
A.
上直肌
B.
下直肌
C.
上斜肌
D.
外直肌
【单选题】外直肌的拮抗肌是:
A.
上直肌
B.
下直肌
C.
上斜肌
D.
内直肌
【单选题】上直肌的拮抗肌是:
A.
上直肌
B.
下直肌
C.
上斜肌
D.
外直肌
【多选题】常规器械训练的原则有哪些?
A.
大负荷原则
B.
循序渐进
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先固定后自由
D.
先大后小
【单选题】It was at this shop ___ I bought my skirt. How abut coming to my home to have a look tonight?
A.
that
B.
where
C.
which
D.
what
【单选题】下斜肌的拮抗肌是:
A.
上直肌
B.
下直肌
C.
上斜肌
D.
外直肌
【判断题】(3)(是非题)基本医疗卫生制度作为保障全民健康的“社会安全网”,是保证社会公平的重要途径。( )
A.
正确
B.
错误
【单选题】上斜肌的拮抗肌是:
A.
上直肌
B.
下直肌
C.
下斜肌
D.
外直肌