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Author Topic: Agentgates´s TPU setup with strange wavehill hump  (Read 341255 times)

Magluvin

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #435 on: January 12, 2010, 05:15:02 PM »
Tes   have you tried the secondary with a load?
Say a 100ohm res. Then see what is there. Also a cap on the sec to see if it builds. try with a diode and without.
Sorry for the do this do that, just stuff that I cannot do.

Mags

agentgates

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #436 on: January 12, 2010, 05:15:09 PM »
Well,
I tried 50% duty cycle signal as low as 75 Hz, increased the primary peak current from 300 mA to 600 mA. It's a no go.
Next, I will make a new coil with 45 degrees single winding primary to see whether that will work for me.

1. Change driving polarity.
2. Turn the device upside down. Lindsay said it makes difference.

I am still glueing.  :-\

agentgates

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #437 on: January 12, 2010, 05:18:40 PM »
-

Magluvin

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #438 on: January 12, 2010, 05:21:02 PM »
I thought that changing the driving polarity would only change the output polarity? Is it possible that depending on the angle and direction of current we could either have rectification or blocking, and in another config, have ou?
Well that would explain a lot. But I am only hearing that now. Weird isnt it.

Magluvin 07

teslaalset

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #439 on: January 12, 2010, 05:35:51 PM »
some updates on previous page to your suggestion guys. Thanks.
Maybe I'll do some birdwatching first  ;)

agentgates

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #440 on: January 12, 2010, 05:39:05 PM »
@Magluvin

Yes, when I was experimenting with that device I didn't observe this carefully, it was only a clue that I though logical. I think I also mentioned that.

It looks like I can't finish with the winding on the nice acrylic today due to the new glue bonds slower than I expected and I can't glue every sides in the same time cause I have to be careful to keep the same spacing on every sides. ::) (Don't get confused on this. It is because this device will be in the presentation and I dont want to make an ugly job)

When I am ready with it I will do some more research on the mentioned polarity and upside down things to make their results an absolute fact. Until then I am improving the software side to make myself useful.

agentgates

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #441 on: January 12, 2010, 05:48:03 PM »
some updates on previous page to your suggestion guys. Thanks.
Maybe I'll do some birdwatching first  ;)

:)

Ok, that is the best thing when you get stuck. It always helped me. :)

broli

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #442 on: January 12, 2010, 05:49:53 PM »
Tony while working on the software I was asking myself. If you use a pulse of 1ms on and 1ms off then you cannot have overlapping phases. The best you can get is having to start the next phase when the previous phase hits low, this would be a delay of half a period. Arduino does support microsecond (accuracy of 4µs) delays but is that high frequency really needed?

Magluvin

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #443 on: January 12, 2010, 05:57:09 PM »
Ok Gates. We have to accept that.

tes   very good then.

But man if there is a formula to this and it works, I should be able to severely increase the range on my ebike. I get 20 mi per charge now, but if this can make 48v at 20a for very little input, Yippy!  lol  I have 3 ebikes one is a Wavecrest tidalforce, another is a trek with an ebay kit, spins the tire, and its a brushless hub motor. The 3rd is a 160 Target bike with a brushed hub motor, it is inefficient and low torque, but 27 mph top speed all motor. lol
Just dreaming.
Im still rooting for ya Gates. Even though my faith is lackluster, but we cannot say I am the only one.

Seems so unlikely that so little wire could do so much. But these are the days of our lives.

Carry on Gates.
Magluvin 0 7

altair

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #444 on: January 12, 2010, 06:00:06 PM »
Thanks agentgates,
it's much clearer now.
You mention driving the coils with 50% duty cycle, so with 3-phases that will have the effect of sometimes having two phases simultaneously ON, because of the overlapping. See attached drawing.  Is this what you planned ?
If instead we were to pulse with 33% duty cycle, there would always be only one phase ON at a time...

By the way, why don't you use cyanoacrylate glue for your coils, it's instant !  ;)

Altair

broli

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #445 on: January 12, 2010, 06:11:17 PM »
Thanks agentgates,
it's much clearer now.
You mention driving the coils with 50% duty cycle, so with 3-phases that will have the effect of sometimes having two phases simultaneously ON, because of the overlapping. See attached drawing.  Is this what you planned ?
If instead we were to pulse with 33% duty cycle, there would always be only one phase ON at a time...

By the way, why don't you use cyanoacrylate glue for your coils, it's instant !  ;)

Altair

You are correct, with 50% there will always be a moment where 2 or 3 pulses overlap. This is a bit the arduino dilemma. In milliseconds mode the minimum frequency is 250Hz. So on and off time of 2ms. So that's the highest frequency you can get using the milliseconds in arduino.

agentgates

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #446 on: January 12, 2010, 06:23:51 PM »
Tony while working on the software I was asking myself. If you use a pulse of 1ms on and 1ms off then you cannot have overlapping phases. The best you can get is having to start the next phase when the previous phase hits low, this would be a delay of half a period. Arduino does support microsecond (accuracy of 4µs) delays but is that high frequency really needed?

I don't know broli. Presently I am writing a new code for my pattern generator that has 12 channels and 500MHz internal clock. It makes me allow to make very accurate phase delays and duty cycles on each channel. In the meantime gluing the new coil and perhaps I will finish with them in the same time.

When I have accurate parameters with the 3 phase version I will make another update.

teslaalset

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #447 on: January 12, 2010, 06:48:06 PM »
Glueing....I would use hot glue, cheap and fast.

plengo

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #448 on: January 12, 2010, 06:48:58 PM »
Could someone, please, post or repost what is the correct picture for the cylinder with the coils on and which coil is the primary and the secondary? Which angle is the correct angle and how many turns for each.

I want to replicate the coil and try all the science that a monkey can find.

Fausto.

Magluvin

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #449 on: January 12, 2010, 06:58:33 PM »
I can sorta understand the 3 phase jig. But within completion of 3 phase pulses, 4 times the energy is being used, actually if 2 are on at any time, as in all the time 2, then the input is 4 times what a single phase would consume.  So it is consuming 4 times the energy of pulsing 1 primary on/off, due to any 2 primaries are on at any time.

Thats just an analysis from what I gather. So all you single primary guys, rip it apart. 3 is the word.  Why did we build those?  hmmm   Im trying to have faith. But as Glenn Beck says  "Questions with boldness".

Magluvin 0 7