Pierre's 170W in 1600W out Looped Very impressive Build continued & moderated

[gotoluc]

My coils bridge 4 poles, whereas Gotolucs stator bridge 5 poles.

5 coils per N/S pole overlapped 1 slot.

Regards

L192

Looks like I have a problem.  I spaced my coils 6 slot wide and I'm having terrible results.  PmgR said it shouldn't matter but maybe it does?...  I need opinions as something is not right.

See results: https://youtu.be/aFQB-WOx-Oc

I think we need to use the Propeller controller instead of the Arduino. Any reason why it can't be used?

The below is the program Pmgr modified for me:

/*
  Blink  This example code is in the public domain.

  modified 8 May 2014
  by Scott Fitzgerald
*/

/* modified by PmgR 4/6/2018 to accomodate 30coil stator */

// the setup function runs once when you press reset or power the board
void setup() {
  pinMode( 1, OUTPUT);
  pinMode( 2, OUTPUT);
  pinMode( 3, OUTPUT);
  pinMode( 4, OUTPUT);
  pinMode( 5, OUTPUT);
  pinMode( 6, OUTPUT);
  pinMode( 7, OUTPUT);
  pinMode( 8, OUTPUT);
  pinMode( 9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);
  pinMode(14, OUTPUT);
  pinMode(15, OUTPUT);
  pinMode(16, OUTPUT);
  pinMode(17, OUTPUT);
  pinMode(18, OUTPUT);
  pinMode(19, OUTPUT);
  pinMode(20, OUTPUT);
  pinMode(21, OUTPUT);
  pinMode(22, OUTPUT);
  pinMode(23, OUTPUT);
  pinMode(24, OUTPUT);
  pinMode(25, OUTPUT);
  pinMode(26, OUTPUT);
  pinMode(27, OUTPUT);
  pinMode(28, OUTPUT);
  pinMode(29, OUTPUT);
  pinMode(30, OUTPUT);
}

int x = 0;

// the loop function runs over and over again forever
void loop(){

  /*Old Pierre code*/
  int y= analogRead(0); //Read out potentiometer setting
  x= map(y,0,1024,1,100); //Map to a delay value from 1ms (50Hz loop speed, 1/3*50Hz magnet speed) to 100ms (0.5Hz loop speed, 1/3*0.5Hz magnet speed).

  /* PmgR modifications below*/
  // Change this x delay number to something else to change the frequency:
  // 1ms results in 50Hz
  // 2ms results in 25Hz
  // 3ms results in 16.66Hz
  // 4ms results in 12.5Hz
  // 5ms results in 10Hz
  // 10ms results in 5Hz
  // x=1; //total loop delay is 20*x = 20ms. f=50Hz
  // x=5; //total loop delay is 20*x = 100ms. f=10Hz

  digitalWrite( 1,HIGH), digitalWrite(11,HIGH), digitalWrite(21,HIGH);
  delay(x);
  digitalWrite(10, LOW), digitalWrite(20, LOW), digitalWrite(30, LOW);
  delay(x);
  digitalWrite( 2,HIGH), digitalWrite(12,HIGH), digitalWrite(22,HIGH);
  delay(x);
  digitalWrite( 1, LOW), digitalWrite(11, LOW), digitalWrite(21, LOW);
  delay(x);
  digitalWrite( 3,HIGH), digitalWrite(13,HIGH), digitalWrite(23,HIGH);
  delay(x);
  digitalWrite( 2, LOW), digitalWrite(12, LOW), digitalWrite(22, LOW);
  delay(x);
  digitalWrite( 4,HIGH), digitalWrite(14,HIGH), digitalWrite(24,HIGH);
  delay(x);
  digitalWrite( 3, LOW), digitalWrite(13, LOW), digitalWrite(23, LOW);
  delay(x);
  digitalWrite( 5,HIGH), digitalWrite(15,HIGH), digitalWrite(25,HIGH);
  delay(x);
  digitalWrite( 4, LOW), digitalWrite(14, LOW), digitalWrite(24, LOW);
  delay(x);
  digitalWrite( 6,HIGH), digitalWrite(16,HIGH), digitalWrite(26,HIGH);
  delay(x);
  digitalWrite( 5, LOW), digitalWrite(15, LOW), digitalWrite(25, LOW);
  delay(x);
  digitalWrite( 7,HIGH), digitalWrite(17,HIGH), digitalWrite(27,HIGH);
  delay(x);
  digitalWrite( 6, LOW), digitalWrite(16, LOW), digitalWrite(26, LOW);
  delay(x);
  digitalWrite( 8,HIGH), digitalWrite(18,HIGH), digitalWrite(28,HIGH);
  delay(x);
  digitalWrite( 7, LOW), digitalWrite(17, LOW), digitalWrite(27, LOW);
  delay(x);
  digitalWrite( 9,HIGH), digitalWrite(19,HIGH), digitalWrite(29,HIGH);
  delay(x);
  digitalWrite( 8, LOW), digitalWrite(18, LOW), digitalWrite(28, LOW);
  delay(x);
  digitalWrite(10,HIGH), digitalWrite(20,HIGH), digitalWrite(30,HIGH);
  delay(x);
  digitalWrite( 9, LOW), digitalWrite(19, LOW), digitalWrite(29, LOW);
  delay(x);

}

[Jeg]

Guys what do you think about the "return" of the coils as Pierre suggested to work on?

In addition if you remember we were wondering what frequency Pierre's meter had measured. We saw the 60Hz but we didn't know if his meter was counting the coil stepping. So if it is possible for Luc or L192 to check this out.

Regards

[listener191]

Guys what do you think about the "return" of the coils as Pierre suggested to work on?

In addition if you remember we were wondering what frequency Pierre's meter had measured. We saw the 60Hz but we didn't know if his meter was counting the coil stepping. So if it is possible for Luc or L192 to check this out.

Regards

Really no coils turn off as such. The previous lead coil just gets a polarity change, so it has a current path through the coils prior to it, back to the next low side switch.

I checked with just a 5 coil group and there is no recovery current back to the supply from the L298N board, while the coils are connected in a series loop.

If you break the coil loop then coil recovery current appears on the L298N supply, back to the cap bank.

L192 

[pmgr]

Looks like I have a problem.  I spaced my coils 6 slot wide and I'm having terrible results.  PmgR said it shouldn't matter but maybe it does?...  I need opinions as something is not right.

See results: https://youtu.be/aFQB-WOx-Oc

Luc, how did you connect the LEDs? Did you use a serial resistor with them? If not, each of them is probably at least drawing 20-30mA if not more. Multiply that with 30 and you are drawing 750mA. The Arduino can't supply that and the computer USB can't supply that either (probably only 500mA), yet the battery can supply the current, but the Arduino is turning on and off (Arduino fuse on board is probably heating up and disconnecting; I believe that board has a thermal 500mA fuse).

You should remove your LEDs as the Arduino can't supply that much current directly. Even with a series resistor in place, it might not be able to handle it. This is also why the USB no longer shows up at your computer. The Arduino board simply can't handle the current load and so everything gets messed up.
PmgR

[Jeg]

If you break the coil loop then coil recovery current appears on the L298N supply, back to the cap bank.

L192

Thanks L192.
By breaking the loop do you mean keeping one coil off between N and S poles?

Luc
As you correctly said, Leds are an unnecessary load for your Arduino outputs, which demand more total current than your Arduino can provide.