Date post: | 21-Aug-2015 |
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Upgrade of the existing transmission line in P402
Supervisor : Andrew Chalmers
Development project 115.715
1
Outlines
①The objectives of the project②Design of the transmission line③Impedance matching system④Laboratory instruction ⑤The project management
2
Objectives
1
• To have a meaningful lab experiment on transmission line
2 • To redesign the existing transmission line
3 • To product the line impedance
4 • To design an impedance matching system
5• To design an instruction sheet
3
Introduction
Full diagram of the project
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The design of the line
The aspect to look at:
The material of the conductor
The sending end boxThe receiving end The strength of the lineThe holders of the both ends
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Line impedance
How to calculate the line impedance?Zo=(276/ε)*log(D/a)
1 2 3 4 5 6 7 8 9 100
100
200
300
400
500
600
700
D=60mmD=50mmD=40mmD=30mm
Diameter in (mm)
Imp
ed
an
ce (
oh
m)
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Impedance matching system
The impedance matching system is called Balun transformer
490 ohms
7
The laboratory instruction
It consists ofThe full diagram of the projectThe description of the componentsThe set up of the generator The set up of the oscilloscope The measurement of the standing wave Compare the measured and the calculated standing
wave
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The modification
The turnbackles
Receiving end
Matching system9
The involvements
Power
Electronics
Drawing Transformers
Radio frequency
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Time plan
design boxes8%
set up conduc-
tors2%
matching system
25%
testing10%modifing
16%
instruction sheet3%
final report25%
final presenta-tion10%
Second semester
research55%
proposal10%
presenta-tion2%
calculation9%
progress25%
First semester
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Conclusion
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The material of the line is steel The line impedance is 490 ohms Impedance matching is balun
transformer The instruction sheet
The end
Any questions?
13