H bridge Igbt

// 16 bit PWM on any pin

// Example uses built in LED on pin 13 (PORTB bit 5)

const int currentPin = A0; // pin that the current sensor is attached to

const int voltagePin = A1; // pin that the voltage sensor is attached to

const int PowerPin = A3; // pin that the voltage sensor is attached to

const int IGBTonPin = 7; 

const int tempPin = A4; // pin that the relay is attached to

const int relayPin = 12; // pin that the relay is attached to

const int voltagerelayPin = 2; //pin that the charging cut out relay is attached to

const int shutdownPin = 4; //pin that the shutdown relay is attached to

const int threshold = 20;//8=50 mv//61; // the current draw (300mv)threshold level that's in the range of the analog input

const int threshold1 = 120; // the voltage draw (600mv)threshold level that's in the range of the analog input

unsigned long starTime = 0; // global variable

unsigned long interval = 1000; // 5 seconds

//int x = 1000;

bool relayFlag = false;

byte attempts = 0;

void setup(){

// initialize the RELAY pins as an output:

pinMode(relayPin, OUTPUT);

pinMode(voltagerelayPin, OUTPUT);

pinMode(shutdownPin, OUTPUT); 

Serial.begin(9600);

pinMode(3, OUTPUT);// GATE IGBT 20 Amps 1200 Volts

cli(); // Disable all interrupts// Disable all interrupts

TCCR1A = 0; // Clear all flags in control register A

TCCR1B = 0; // Clear all flags in control register B

TCNT1 = 0; 

TCCR1A = _BV(COM1A1) | _BV(COM1B1) | _BV(WGM10) |_BV(WGM00);

TCCR1B = _BV(WGM12) | _BV(CS00); // prescaler = 1 

TIMSK1 |= _BV(OCIE1A); // Enable timer compare interrupt

TIMSK1 |= _BV(TOIE1); // Enable timer overflow interrupt

sei(); // enable all interrupts

}

void loop(){

for(unsigned int x = 0; x < 65535; x++){

OCR1A = x/map(analogRead(5),140,0,35,0);//power out put control A5

delayMicroseconds (1);

// read the value of the current sensor:

int analogValue = analogRead(currentPin);

// if the analog value is high enough, power the relay:

if (relayFlag == false && attempts < 999 && analogValue > threshold) 

{

digitalWrite(relayPin, HIGH);

relayFlag = true;

starTime = millis(); // start timer

digitalWrite(shutdownPin, LOW);

delay (5000);

}

if(relayFlag == true && millis() - starTime >= 1000UL) 

{ 

// current time - start time >= 5 seconds 

digitalWrite(relayPin,LOW);

//delay(100); //this could be removed if needed

if(voltagePin > 5)

digitalWrite (voltagerelayPin,HIGH);

digitalWrite (shutdownPin, LOW);

relayFlag = false;

attempts = attempts + 1;

delay (1000);

digitalWrite(shutdownPin, HIGH);

delay (1000);

} 

}

}

ISR(TIMER1_OVF_vect){ // Timer1 overflow interrupt service routine

PORTD |= _BV(PORTD3); 

PORTD |= _BV(PORTD7); 

}

ISR(TIMER1_COMPA_vect){ // Timer1 compare interrupt service routine

PORTD &= ~_BV(PORTD3); 

PORTD &= ~_BV(PORTD7);

}