3 phase inverter using IGBT to convert DC to AC Voltage

[waelzakzouk]

Hello Community Team,

I would like to generate 6 separate gate pulses (6 Digital signals from T1 to T6 as shown in below picture) to control 3 phase inverter, these 6 pulses are changing in the same time and hold this status for 5 msec, the complete cycle will be 30 msec (equivalent 0 to 360 Deg ) and it will repeat forever, below i will put complete cycle (6 Diff. pulses status and each status period is 5 msec ).

Status1: T1, T5 and T6 will be High
Status2: T1, T2 and T6 will be High
Status3: T1, T2 and T3 will be High
Status4: T2, T3 and T4 will be High
Status5: T3, T4 and T5 will be High
Status6: T4, T5 and T6 will be High

i have Arduino UNO and MSGA, so appreciate your support to give me program to get this functioning .

Thanks and Best Regards,,

Wael Zakzouk

[PerryBebbington]

Your topic was moved to its current location as it is more suitable.

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Thank you

[horace]

you could define your states as a sequence of arrays, e.g.

  byte state1[]={1,0,0,0,1,1};
  byte state2[]={1,1,0,0,0,1};

and every 5mSec move to the next state

or even use a 2D array

  byte states[6][6]={ {1,0,0,0,1,1}, {1,1,0,0,0,1}, .....};

[waelzakzouk]

Thanks horace for your response and appreciate to give more details please

[horace]

output just two states

void setup() {
  pinMode(2,OUTPUT);
  pinMode(3,OUTPUT);
}

void loop() {
   static int state=0;
   // inverter states - add other 4 states
   byte states[6][6]={ {1,0,0,0,1,1}, {1,1,0,0,0,1}};
   digitalWrite(2,states[state][0]);
   digitalWrite(3,states[state][1]);
   // move to next state - if at end reset
   if(++state>=2)state=0;
   delay(5);
}

looking at pin 3 with an oscilloscope

when complete T1 T2 T3 and T4 would look like

[waelzakzouk]

Many Thanks Horace .....it's very clear now

actually your support is more than enough but i have another request

appreciate if we can replace the 5 msec with and timer value and we control the timer value with potentiometer.

[horace]

you could connect a potentiometer to A0 and read the analogue value which would range 0 to 1024
you then use this value for the delay, e.g. this should give a delay 0 to 10mSec

  delay(analogRead(A0)/10);

[waelzakzouk]

Appreciate your Support and Cooperation Horace