Delta-y impedance circuit transformation – Sharp EL-5230 User Manual
Page 101
99
Delta-Y impedance circuit transformation
Transformation of a Y impedance circuit to an equivalent Delta impedance
circuit and vice versa.
1.
Press b 2 1 0 to open a window for creating a NEW
program.
2.
Type DELTAY for the title then press e.
• A NEW program called ‘DELTAY’ will be created.
3.
Enter the program as follows.
Program code
Key operations
Print”(1)DELTA TO Y
i 1 ( 1 ) @ a
DELTA
s TO s Y ; e
Print”(2)Y TO DELTA
i 1 ( 2 ) @ a Y
s TO s DELTA ; e
Input X
i 2 ; X e
If X=1 Goto DTOY
i 8 ; X ; = 1 ;
s i 9 @ a DTOY
; e
If X=2 Goto YTOD
i 8 ; X ; = 2 ;
s i 9 @ a YTOD
; e
Label DTOY
i 6 @ a DTOY ;
e
R
1
Z
1
R
2
Z
2
R
3
Z
3
The Delta-Y transformation is defined by the following formula:
R
1
= ———
R
2
= ———
R
3
= ———
where Z = Z
1
+ Z
2
+ Z
3
Z
1
Z
2
Z
Z
2
Z
3
Z
Z
3
Z
1
Z
Z
1
= —
Z
2
= —
Z
3
= —
where R = R
1
R
2
+ R
2
R
3
+ R
3
R
1
R
R
2
R
R
3
R
R
1
Chapter 8: Application Examples