SEPIC CONVERTER WITH MPPT




CIRCUIT



WAVE FORMS (all signal is taken with respect ground , else will be noted )


INPUT FROM SOLAR PANEL

GATE OF MOSFET

DRAIN OF MOSFET


ACROSS THE INDUCTOR L1 (1mH)


ACROSS THE INDUCTOR C2 (.47UF)

ACROSS THE INDUCTOR L2(1mH)

ACROSS THE DIODE (BYQ28E)

OUTPUT VOLTAGE



PROGRAM( FOR THE INPUT SOURCE IS  SOLAR PANEL)

//r=33
//V=12.54
 //feed back by 10k and 1k
//adc value ---1.27V for 14
//adc=1.270/4.88mV ==260
//to get adc value =v/.053
//for 13----245
//for 13.5--254
//for 14--260
int c=0;int pwmpin=10,a;
int p=50;

int power,pp,cp;
#include <LiquidCrystal.h>
LiquidCrystal lcd(3, 4, 5, 6, 7, 8);//LCD RS-3,En-4,D4-5,D5- 6,D6-7,D7-8
int x,y;
void setup()
{
x= analogRead(A0);
    delay(1);
 
setPwmFrequency(pwmpin,1);
analogWrite(pwmpin,p);
 lcdstart();
Serial.begin(9600);
 delay(100);
}

void loop()
{
int y=analogRead(5);
Serial.println(y);
delay(1);
int i = (analogRead(A0)-x);
delay(1);
pp=y*i;
 //
if(y>265)
{
p=p-1;analogWrite(pwmpin,p);delay(30);
 Serial.println("hhhh");
}
if(y<260)
{
  Serial.println("less");
p=p+3;if(p>220)p=220;
analogWrite(pwmpin,p);
delay(30);
  int cv=analogRead(5);
  delay(1);
  int i = (analogRead(A0)-x);
  delay(1);
cp=cv*i;
 if(cp<pp)
{
  p=p-8;
//if(p>160) p=p-9; else  p=p-3;
 if(p<1)p=0;analogWrite(pwmpin,p);
delay(30);
}
}

c++;
if(c>30)
{
  c=0;
int i = (analogRead(A0)-x)*36;//*12.56=45//0.045
delay(1);if(i<0)i=0;
float v = y;
v=v/18;
float w=(i*v)/1000;
//delay(100);
lcd.clear();
lcd.setCursor(0, 0); lcd.print(i);  lcd.print("mA");//Serial.println(w);
lcd.setCursor(8, 0); lcd.print(v);  lcd.print("v");// Print a message to the LCD.
lcd.setCursor(0, 1); lcd.print(w);  lcd.print("W");// Print a message to the LCD.
c=0;
}
}

void lcdstart(void)
{
lcd.begin(16, 2);// set up the LCD's number of columns and rows:
lcd.setCursor(0, 0);
lcd.print("CUK converter");// Print a message to the LCD.
//delay(500);
//lcd.clear();
}
void setPwmFrequency(int pin, int divisor) {
  byte mode;
  if(pin == 5 || pin == 6 || pin == 9 || pin == 10) {
    switch(divisor) {
      case 1: mode = 0x01; break;
      case 8: mode = 0x02; break;
      case 64: mode = 0x03; break;
      case 256: mode = 0x04; break;
      case 1024: mode = 0x05; break;
      default: return;
    }
    if(pin == 5 || pin == 6) {
      TCCR0B = TCCR0B & 0b11111000 | mode;
    } else {
      TCCR1B = TCCR1B & 0b11111000 | mode;
    }
  } else if(pin == 3 || pin == 11) {
    switch(divisor) {
      case 1: mode = 0x01; break;
      case 8: mode = 0x02; break;
      case 32: mode = 0x03; break;
      case 64: mode = 0x04; break;
      case 128: mode = 0x05; break;
      case 256: mode = 0x06; break;
      case 1024: mode = 0x7; break;
      default: return;
    }
    TCCR2B = TCCR2B & 0b11111000 | mode;
  }
}

/**
 * Divides a given PWM pin frequency by a divisor.
 *
 * The resulting frequency is equal to the base frequency divided by
 * the given divisor:
 *   - Base frequencies:
 *      o The base frequency for pins 3, 9, 10, and 11 is 31250 Hz.
 *      o The base frequency for pins 5 and 6 is 62500 Hz.
 *   - Divisors:
 *      o The divisors available on pins 5, 6, 9 and 10 are: 1, 8, 64,
 *        256, and 1024.
 *      o The divisors available on pins 3 and 11 are: 1, 8, 32, 64,
 *        128, 256, and 1024.
 *
 * PWM frequencies are tied together in pairs of pins. If one in a
 * pair is changed, the other is also changed to match:
 *   - Pins 5 and 6 are paired on timer0
 *   - Pins 9 and 10 are paired on timer1
 *   - Pins 3 and 11 are paired on timer2
 *
 * Note that this function will have side effects on anything else
 * that uses timers:
 *   - Changes on pins 3, 5, 6, or 11 may cause the delay() and
 *     millis() functions to stop working. Other timing-related
 *     functions may also be affected.
 *   - Changes on pins 9 or 10 will cause the Servo library to function
 *     incorrectly.
 *
 * Thanks to macegr of the Arduino forums for his documentation of the
 * PWM frequency divisors. His post can be viewed at:
 *   http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1235060559/0#4
 *
 */


PROGRAM( FOR THE INPUT SOURCE IS NOT SOLAR PANEL)

 //feed back by 10k and 1k
//adc value ---1.27V for 14
//adc=1270/4.88 ==260
//to get adc value =v/.053

//13----245
//13.5--254
//14--260
int p=125;
void setup()
{
setPwmFrequency(6, 1);
analogWrite(6,p);
Serial.begin(9600);
Serial.println("HAII");
//delay(5000);delay(5000);
}
void loop()
{

int a=analogRead(2);
delay(1);
//Serial.println(a);
//Serial.print("P=");
//Serial.println(p);

if(a>260)
{
  p=p-1;
  analogWrite(6,p);
  if(p<0)p=0;
}
if (a<245 )//&& a>150
{
  p=p+1;
  if(p>220)p=p-1;
  analogWrite(6,p);
}
}

void setPwmFrequency(int pin, int divisor) {
  byte mode;
  if(pin == 5 || pin == 6 || pin == 9 || pin == 10) {
    switch(divisor) {
      case 1: mode = 0x01; break;
      case 8: mode = 0x02; break;
      case 64: mode = 0x03; break;
      case 256: mode = 0x04; break;
      case 1024: mode = 0x05; break;
      default: return;
    }
    if(pin == 5 || pin == 6) {
      TCCR0B = TCCR0B & 0b11111000 | mode;
    } else {
      TCCR1B = TCCR1B & 0b11111000 | mode;
    }
  } else if(pin == 3 || pin == 11) {
    switch(divisor) {
      case 1: mode = 0x01; break;
      case 8: mode = 0x02; break;
      case 32: mode = 0x03; break;
      case 64: mode = 0x04; break;
      case 128: mode = 0x05; break;
      case 256: mode = 0x06; break;
      case 1024: mode = 0x7; break;
      default: return;
    }
    TCCR2B = TCCR2B & 0b11111000 | mode;
  }
}

/**
 * Divides a given PWM pin frequency by a divisor.
 *
 * The resulting frequency is equal to the base frequency divided by
 * the given divisor:
 *   - Base frequencies:
 *      o The base frequency for pins 3, 9, 10, and 11 is 31250 Hz.
 *      o The base frequency for pins 5 and 6 is 62500 Hz.
 *   - Divisors:
 *      o The divisors available on pins 5, 6, 9 and 10 are: 1, 8, 64,
 *        256, and 1024.
 *      o The divisors available on pins 3 and 11 are: 1, 8, 32, 64,
 *        128, 256, and 1024.
 *
 * PWM frequencies are tied together in pairs of pins. If one in a
 * pair is changed, the other is also changed to match:
 *   - Pins 5 and 6 are paired on timer0
 *   - Pins 9 and 10 are paired on timer1
 *   - Pins 3 and 11 are paired on timer2
 *
 * Note that this function will have side effects on anything else
 * that uses timers:
 *   - Changes on pins 3, 5, 6, or 11 may cause the delay() and
 *     millis() functions to stop working. Other timing-related
 *     functions may also be affected.
 *   - Changes on pins 9 or 10 will cause the Servo library to function
 *     incorrectly.
 *
 * Thanks to macegr of the Arduino forums for his documentation of the
 * PWM frequency divisors. His post can be viewed at:
 *   http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1235060559/0#4
 *
 */