applying equations on ADC samples in mikroC

[hafizimran18]

i want to apply these given equations in mikroC, please help me out

i found this thing some helpfull ,, but still there is a problem,, when using simpe multiplications i.e p=v*i;
it gives exactly 25watt power with d.c source of 5V and 5A current,, but when same source is applied using these equations it do not give 25watt,, please help,, i am in trouble

unsigned int V, Itotal, Ifund;
unsigned long Swith_harmonic;
double Iharmonic, Qharmonic,a, distAngle, TrueActPwr ;

void main()
{
  ADCON1 = 0x80;  // Configure analog inputs and Vref
  TRISA  = 0xFF;  // PORTA is input
  TRISB  = 0x3F;  // Pins RB7, RB6 are outputs
  TRISD  = 0;     // PORTD is output
do
{

V = ADC_Read(0); // channel_V is the analog channel where you give the V input;

Itotal = ADC_Read(1);

Ifund = ADC_Read(2);

V = (V%1024)*5;

Itotal = (Itotal%1024)*5;

Ifund = (Ifund%1024)*5;

Swith_harmonic = V * Itotal;

Iharmonic = sqrt((Itotal * Itotal) - (Ifund * Ifund)); // Select the C_Math library for using this function

Qharmonic = V * Iharmonic;

distAngle = asin(Qharmonic  / Swith_harmonic);

TrueActPwr = Swith_harmonic * cos(distAngle);

PORTD = TrueActPwr;


  } while(1);
}

 

[jayanth.devarayanadurga]

Why are you doing these?
V = (V%1024)*5;

Itotal = (Itotal%1024)*5;

Ifund = (Ifund%1024)*5;

It should be

V = V*5/1023;

Itotal = Itotal*5/1023;

Ifund = Ifund*5/1023;

 

[hafizimran18]

Why are you doing these?
V = (V%1024)*5;

Itotal = (Itotal%1024)*5;

Ifund = (Ifund%1024)*5;

It should be

V = V*5/1023;

Itotal = Itotal*5/1023;

Ifund = Ifund*5/1023;

yes you are right,, its working but, now there is another problem,,, it is working for constant d.c of 5V, but showing zero output for pulsating d.c with Vmax=5V,, any idea about this thing?

 

[jayanth.devarayanadurga]

yes you are right,, its working but, now there is another problem,,, it is working for constant d.c of 5V, but showing zero output for pulsating d.c with Vmax=5V,, any idea about this thing?

zip and post your project files including hex file and proteus file.

 

[hafizimran18]

zip and post your project files including hex file and proteus file.

here it is, compiled in mikroC 8.0