Sharp EL-5230, Руководство по эксплуатации

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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