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

[listener192]

L192, very nice build!!

How do you have your capacitor bank connected? Take a look again at Pierre's very first video. The positive of the capacitor bank does NOT go to the relays. It is only connected to one end of the 4ohm resistor AND to the return of the diodes (but not the relays).

Make sure you have the 4ohms resistor in place.

Also make sure that you drive the switch contacts of the relays (not the Arduino contacts) exactly as Pierre does (see black and red wire in first video top of relay 72): again, they are NOT connected to the capacitor bank, but they are connected to another smaller 400V capacitor (the one that connects to the rectifier diode bridge) through the thin red wire and they connect to the other side of the 4ohm resistor. Makes sure to use a high voltage capacitor.

Then hook up the potentiometer to change the timing of the relays and change it very slowly until you see something happen on the output coil, then fine-tune the timing.

PmgR

Hi PmgR,
I am using a 0-30V 50A switch mode power supply so I don't need the 4 ohm resistor, as the power supply is current limited.
I will look again at what you have described
regards
L192

[pmgr]

Hi PmgR,
I am using a 0-30V 50A switch mode power supply so I don't need the 4 ohm resistor, as the power supply is current limited.
I will look again at what you have described
regards
L192

You can hook your power supply up directly to the positive of the capacitor bank. But make sure to still install the 4ohm resistor, one end of the resistor to the positive of the capacitor bank and the other end to the smaller capacitor and the relays (again, see Pierre's first video).
PmgR

[d3x0r]

L192, very nice build!!

How do you have your capacitor bank connected? Take a look again at Pierre's very first video. The positive of the capacitor bank does NOT go to the relays. It is only connected to one end of the 4ohm resistor AND to the return of the diodes (but not the relays).

Make sure you have the 4ohms resistor in place.

Also make sure that you drive the switch contacts of the relays (not the Arduino contacts) exactly as Pierre does (see black and red wire in first video top of relay 72): again, they are NOT connected to the capacitor bank, but they are connected to another smaller 400V capacitor (the one that connects to the rectifier diode bridge) through the thin red wire and they connect to the other side of the 4ohm resistor. Makes sure to use a high voltage capacitor.



PmgR

I was all ready to challenge that... but I see what you mean...
So that will help keep my coils from overheating +4 ohms resistance....

[listener192]

I was all ready to challenge that... but I see what you mean...
So that will help keep my coils from overheating +4 ohms resistance....

The 4 ohm resistor is required if you are using a linear power supply, otherwise the current draw when charging the super caps will be excessive. If I apply 20V from a zero charge starting point, 50A is drawn from my power supply, which is the maximum current limit. It would draw more than that uncontrolled. I don't see that the resistor serves any other purpose.
Regards
L192

[jerdee]

Listener et all,

  I can not confirm but strongly suggest that your coil slots have to line up with your rotational fields!  PC uses 36/6 = 6 slots, with 30 poles, you are left with 30/6 = 5 slots per winding.  The biggest issue PC is having is his width of the pure field!  The criss-crossing of the magnetic windings does not allow him much options.  This is why he is building a better device.  This is also why we want as many possible slots divisible by 6 on the ROTOR!  If we had a 60 slots on the same size stator, we can then get 60 slots divisible by 6 equaling 10 slots per coil.  We've now created a wider and smoother area to maintain the PURE field.  With the 30 slot rotor, we are doing the opposite, we are losing resolution, which is not good.  This is why the 36 slot rotor is better than the 30 slot system.  But I still believe we can see this effect for sure even with the 30.  Think of it as a digitally controlled rotational field in increments.  I believe we want the highest amount of increments per PURE field.  With a normal generator, the values are infinite, its analog right?!?!

Again, study generator basics. Every one is only seeing one half of the picture.  Again...the rotational field windings is NOT the only answer!!!  I keep saying this.  There is MORE!!!!!

Also, my original thought of using twice the amount of half bridges to strengthen the field is possibly not good!  You will lose something very important.  So the schematic shown below only shows three active half bridges with three more later in overlap.  So only 6 active at any one point in time.   Just like PC.  With his and your relay system using no double throw you have no choice but to keep 60 relays on your system. Which I believe will be fine enough to study the effect.  You will however lose considerable speed and quality of holding the field in rotation with your relays.  This is his hash he is showing in his scope shot.  With half bridges, you can easily smooth this out with a bypass cap.  This is why half bridges have a considerable advantage.  MUCH higher speeds and controlled overlap of the field at these higher speeds.  Higher speeds are important for this device.

Remember this....the STATOR is what makes the current, not the current into the relays.  Your armature output is only colleting the EMF.  I'm certain of this.  Have you asked yourself why PC uses 25V?  And no, we are not braking lenz law here.

Hope this helps,
Jerdee