Basic Elec. Engr Basic Elec. Engr. Lab . Lab ECS 204 ECS 204 - - PowerPoint PPT Presentation

• Asst. Prof. Dr. Prapun Suksompong

prapun@siit.tu.ac.th

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Basic Elec. Engr Basic Elec. Engr. Lab . Lab

ECS 204 ECS 204

Lab 3

• Superposition Theorem (Part A)
• Maximum Power Transfer (Part B)

Part A

2 ps1 1 3 2 ps2 1 2 3

ps1 1 3 2 1 2 3

A.(a) A.(b) A.(c)

A.(b)

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A

 

 

           

2 3 1 1 2 3 1 1 2 3 1 1 1 2 2 2 3 3 3

/ / / /

b A ps b ps A b A b A b b b

R R V V R R R V V V V V V V V I R V I R V I R         

Voltage divider

A.(c)

5

A

 

  



   

 

       

1 3 2 2 1 3 1 2 2 3 1 1 1 2 2 2 3 3 3

/ / / /

c A ps c A c A ps c A c c b

R R V V R R R V V V V V V V V I R V I R V I R             

These two nodes are not the same. Resistor R2 and R3 are not in parallel. Voltage divider

A.a

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                                   

1 1 1 2 2 2 1 1 1 2 2 2 3 3 3 3 3 3 a b c a b c a b c a b c a a b c b c

I I I I I I I I I V V V V V V V V V             Remark: Some of these values will be negative!!

1 3 2 1 2 3

Multiple voltage sources

8

1 3 2 1 2 3

This connection can use the small connector.

Vps1 Vps2

Note that it is the “-” (black) terminal of Vps1 that is connected to the “+” (red) terminal of Vps2.

Multiple voltage sources

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1 3 2 1 2 3

This connection can use the small connector.

Vps1 Vps2

Note that it is the “-” (black) terminal of Vps1 that is connected to the “+” (red) terminal of Vps2.

Part B

10

2 L L L

V P R 

2 max

4

TH TH

V P R  + VL _

You may have to combine the potentiometer (in series) with some regular resistor to produce the desired resistance value.