STAR-DELTA TRANSFORMATION IN MATLAB AND C PROGRAMMING

Here is a simple a program written in MatLab and C programming to transform Resistance from Delta to Star and vice versa.
The C program can also find the equivalent resistance of resistors in series and parallel.

MATLAB

.m file for delta2star

function[soln]=delta2star(R_ab,R_bc,R_ac)
R_a=(R_ab*R_ac)/(R_ab+R_bc+R_ac);
R_b=(R_ab*R_bc)/(R_ab+R_bc+R_ac);
R_c=(R_bc*R_ac)/(R_ab+R_bc+R_ac);
fprintf('delta values \t Star values\n ')
fprintf('R_ab=%.2f \t R_a=%.2f \n',R_ab,R_a);
fprintf('R_bc=%.2f \t R_b=%.2f \n',R_bc,R_b);
fprintf('R_ac=%.2f \t R_c=%.2f \n',R_ac,R_c);
soln=[R_a;R_b;R_c];
end

.m file for star2delta

function [Soln] = star2delta(R_a,R_b,R_c)
R_ab = R_a + R_b + (R_a*R_b)/R_c;
R_bc = R_b + R_c + (R_b*R_c)/R_a;
R_ac = R_a + R_c + (R_a*R_c)/R_b;
fprintf('delta values \t Star values \n')
fprintf('R_a=%.2f \t R_ab=%.2f \n',R_a,R_ab)
fprintf('R_b=%.2f \t R_bc=%.2f \n',R_b,R_bc)
fprintf('R_c=%.2f \t R_ac=%.2f \n',R_c,R_ac)
Soln=[R_ab;R_bc;R_ac];
end


output


Browse to where your m files are located in the current directory you can use cd command, in my case it was saved at the directory "c:\users\Zakaria\Documents\Matlab\blog" .

C PROGRAM

Also included in the c program, can  calculate Resistors in series and parallel

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void Parallel_Series();     //declare series and parallel conversion function
void Star_Delta_xform();    //declare series and parallel conversion function
int input;
int main()
{
    do
    {
        printf("__________________________\n");
        printf("Select Conversion:\n");
        printf("__________________________\n");
        printf("1. Equivalent resistance of Parallel connection\n");
        printf("2. Equivalent resistance of Series connection\n");
        printf("3. Star Delta Transformation\n");
        printf("4. Exit\n");
        printf("Select: ");
        scanf("%d",&input);

        if (input == 1 || input == 2)
        {
            Parallel_Series();
        }

        else if(input == 3)
        {
            Star_Delta_xform();
        }

        else
        {
            printf("Wrong Selection! Try Again\n");
        }

    }
    while(input != 4);

    return 0;
}
void Parallel_Series()
{
    int num,cnt;
    float R[100],R_t,result=0;
    char str1[9]="Parallel";
    char str2[8]="Series";
    if (input==2)
    {
        //copy string 2 to 1 to display series instead of parallel
        strcpy(str1,str2);
    }
    printf("How many number of Resistors are in %s: ",str1);
    scanf("%d",&num);
    printf("Enter Value for: \n");
    for(cnt=0; cnt!=num; cnt++)
    {

        printf("%s R_%d=",str1,cnt+1);
        scanf("%f",&R[cnt]);
        //for parallel
        if (input==1)
        {
            result +=  1/R[cnt];
            R_t = 1/result;
        }
        else
        {
            R_t +=  R[cnt];
        }
    }

    printf("Equivalent resistance of %d resistors in %s is %.2f Ohms\n",num,str1,R_t);
}

void Star_Delta_xform()
{
    float R_a=0,R_b=0,R_c=0,R_ab,R_bc,R_ac;
    int select;
    printf("Select transformation\n----------------------\n");
    printf("1. Star --> Delta\n");
    printf("2. Delta --> Star\n");
    printf("Select: ");
    scanf("%d",&select);
    switch(select)
    {
    case 1:
    {

        printf("1. enter the value of the Star connected resistors:\n");
        printf("R_a = ");
        scanf("%f",&R_a);
        printf("R_b = ");
        scanf("%f",&R_b);
        printf("R_c = ");
        scanf("%f",&R_c);

        R_ab=R_a+R_b+(R_a*R_b)/R_c;
        R_bc=R_b+R_c+(R_b*R_c)/R_a;
        R_ac=R_a+R_c+(R_a*R_c)/R_b;

        printf("the equivalent Delta config. is: \n");
        printf("R_ab = %.2f Ohms\n",R_ab);
        printf("R_bc = %.2f Ohms\n",R_bc);
        printf("R_ac = %.2f Ohms\n",R_ac);
        break;

    }

    case 2:
    {
        printf("1. enter the values of the Delta connected resistors:\n");
        printf("R_ab = ");
        scanf("%f",&R_ab);
        printf("R_bc = ");
        scanf("%f",&R_bc);
        printf("R_ac = ");
        scanf("%f",&R_ac);

        R_a = (R_ab*R_ac)/(R_ab + R_bc + R_ac);
        R_b = (R_ab*R_bc)/(R_ab + R_bc + R_ac);
        R_c = (R_ac*R_bc)/(R_ab + R_bc + R_ac);

        printf("the equivalent Star config. is: \n");
        printf("R_a = %.2f Ohms\n",R_a);
        printf("R_b = %.2f Ohms\n",R_b);
        printf("R_c = %.2f Ohms\n",R_c);
        break;

    }
    }
}


output


STAR-DELTA TRANSFORMATION IN MATLAB AND C PROGRAMMING STAR-DELTA TRANSFORMATION  IN MATLAB AND C PROGRAMMING Reviewed by Zakaria Mohammed on October 10, 2015 Rating: 5

1 comment :

  1. The maximum number of resistors that may be used is two. We must select if the user wants a parallel or series circuit's total resistance. but C programming languages is better than other languages, so I'm a writer and I write an essay for finance essay help if you write an essay I'll be here.

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