Pwm frequency of SPWM

Projects Programming
1

Hello, i'm using this code to creat SPWM signal to a full-bridge inverter

float carrier, Uref, notref, t;

void setup()
{

  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(11, OUTPUT);

  digitalWrite(9, LOW);
  digitalWrite(10, LOW);
  digitalWrite(11, LOW);
  digitalWrite(3, LOW);

}

void loop() {



  for (t = 0; t < 100; t = t + 0.0002) {


    Uref = sin(2 * PI * 50 * t);

    notref = -1 * sin(2 * PI * 50 * t);

    carrier = ((2 / PI) * asin(sin(2 * PI * 9500 * t)));

    if (Uref >= carrier) {

      digitalWrite(10, LOW);
      delayMicroseconds(100);
      digitalWrite(11, HIGH);
    } else {

      digitalWrite(11, LOW);
      delayMicroseconds(100);
      digitalWrite(10, HIGH);
    }

    //********************************************//

    if (notref >= carrier) {

      digitalWrite(3, LOW);
      delayMicroseconds(100);
      digitalWrite(9, HIGH);
    } else {
      digitalWrite(9, LOW);
      delayMicroseconds(100);
      digitalWrite(3, HIGH);
    }
  }
}

So I have tried this and I get good results so, I have a doubt because I'm compare a sin wave (Uref) 50hz with a triangular carrier 9500Hz, so my PWM should have 9500Hz of frequency but i'm printing this PWM in pin 3,9,10 and 11 which have 490Hz frequency and this is a problem... How I can change my code to solve this?

Thanks

2

but i'm printing this PWM in pin 3,9,10 and 11 which have 490Hz frequency

Only if you use analogWrite() to do hardware PWM. Which you aren't, so

and this is a problem

is an erroneous conclusion.

3

PaulS:
Only if you use analogWrite() to do hardware PWM. Which you aren't, sois an erroneous conclusion.

I don't understand sorry, what you suggest me?