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【单选题】
If the three-phase symmetric current of
,
,
and is entered into the three-phase symmetric winding, the amplitude of the three-phase fundamental wave resultant magneto motive force is located at () when The three-phase symmetric winding is
.
A.
U-phase winding axis
B.
V-phase winding axis
C.
W-phase winding axis
D.
A location away from the axis of the three-phase winding
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参考解析：
刷刷题刷刷变学霸
举一反三
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A.
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B.
F
C.
3/2F
D.
3F
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A.
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B.
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C.
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D.
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E.
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【单选题】If the three-phase symmetrical winding is connected with the three-phase three-phase current iA=Im ,iB=Im ,iC=Im , when wt = 210°, the amplitude of the three-phase fundamental wave resultant magnetomo...
A.
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【单选题】Beat 5 of the Waist-twining 180-degree-turn Beating: Step the left foot（ ）to form a bow stance.
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【单选题】The magnetic force generated by ac single-phase winding is a function of both time and space, which refers to ().
A.
The current is A function of time and the magnetomotive force is A function of space;
B.
The magnetomotive force is a function of time and the current is a function of space;
C.
The magnetic force is distributed cosine in space and rotates with time;
D.
The amplitude of the magnetomotive force is pulsating with time, and the magnetomotive force is distributed cosine in space.