Bas Basic ic El Elec. ec. En Engr gr. . Lab Lab EC ECS S - PowerPoint PPT Presentation

Bas Basic ic El Elec. ec. En Engr gr. . Lab Lab EC ECS S 204 04/2 /210 Dr. Prapun Suksompong prapun@siit.tu.ac.th Office Hours: BKD 3601-7 Tuesday 9:30-10:30 Friday 14:00-16:00 1

Lab 3  Superposition Theorem  Maximum Power Transfer 2

Part A I 1 I 3 R1 _ + V 1 I 2 (b) + + V 2 V 3 V ps1 R2 R3 I 1 I 3 _ _ R1 _ + V 1 I 2 + + V 2 V 3 V ps1 R2 R3 I 1 I 3 _ _ R1 _ + V 1 I 2 V ps2 + + V 2 V 3 R2 R3 _ _ (a) V ps2 (c) 3

A.b R / / R    b 2 3 V V    A ps 1 R R / / R I 1 I 3 1 2 3 R1 A     b V V V 1 ps 1 A _ + V 1    I 2 b V V 2 A    b V V + + 3 A V 2 V 3 R2 R3 V ps1 V    b _ 1 _ I 1 R 1 V    b 2 I 2 R 2 V    b 3 I 3 R 3 4

A.c    R / / R      c 1 3 V V   A ps 2 R R / / R 2 1 3     c V V I 1 I 3 R1 1 A A        c V V V _ 2 A ps 2 + V 1 I 2    c V V 3 A V   + +  c 1 I 1 V 2 V 3 R R2 R3 1 _ _ V    c 2 I 2 R 2 V ps2 V    b 3 I 3 R 3 5

A.a I 1 I 3 I 1 I 3 R1 R1 _ _ + V 1 + V 1 I 2 I 2 + + + + V 3 V ps1 V 2 R2 R3 V 2 V 3 R2 R3 _ _ _ _ V ps2 I 1 I 3 R1 _         + a b c V 1 V V V I 2 1 1 1         a b c V V V 2 2 2 + +         a b c V 2 V 3 V V V V ps1 R2 R3 3 3 3 _ _         a b c I I I 1 1 1         a b c I I I V ps2 2 2 2         a b c I I I 3 3 3 Remark: Some of these values will be negative!! 6

Part B 2 V  L P L R L + V L _ 2 V  TH P max 4 R TH 7