What does the man think of the last surprise party?A.Satisfactory．B.Unusual．###S

一台三相4极异步电动机PN=10 kW，UN=380 V，IN=19．8 A。定子绕组为星形接法，R1=0．5Ω。空载试验数据为：U0=380 V，I0=5．4 A，机械损耗pmec=80 W；堵转试验数据为：Uk=120 V，Ik=18．1A。忽略空载附加损耗，认为Xσ1=Xσ2，求该电动机的参数R、X、X、Rm和Xm。电动机的转速； 点击查看答案

Why is the woman in London?A.She is on holiday．B.She is on a business trip．###S

A.She
B.She
C.
C.She
D.She
E.

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