电路原理_skja_35

电路原理_skja_35

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三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三 三三三 三三三三三三三三 三三三 三三三三三三三三 三三三三三三 三三三三三三
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三三三三三三三三三三三 三三三三三三三三三三三三三三三三三三三三三三 120° 三三三三三三三三三三三三三三三三三三三三三三三三三三三三三三三三 N S º º I ϖ A Z B X C Y 三三三三三三三三三三
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1. 三三三三三三 ) 120 sin( 2 ) ( ) 120 sin( 2 ) ( ) sin( 2 ) ( o C o B A + + = - + = + = ψ t ω U t u ψ t ω U t u ψ t ω U t u A + X u A B + Y u B C + Z u C 2. 三三三 ϖ t O u A u B u u C
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3. 三三三三 ) 0 ( 120 120 0 o C o B o A = = - = = ψ U U U U U U A U B U C U 120° 120° 120° 4. 三三三三三三三三三 0 0 C B A C B A = + + = + + U U U u u u
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三三 ( 三三 , Positive Sequences ) 三 A—B—C—A 三三 ( 三三 , Negative Sequences ) 三 A—C—B—A A B C 三三三 实实实实 三三三三三三三三三三三三三三三三三三三三 三三三三三三三三三三三三三三三三三三三 A C B D A B C 1 2 3 D A C B 1 2 3 三三 三三 5. 三三三三三三三 三三 (Sequences) 三 三三三三三三三三三三三三三三 ( 三三三三 ) 三三三三三三
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This note was uploaded on 11/22/2011 for the course EE Ele taught by Professor Cheng during the Fall '10 term at Tsinghua University.

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电路原理_skja_35

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