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Apr 06, 2014, 08:28 AM
"The Judge"
sebbe's Avatar
Would this be OK? Double all wires..... could this make any strange electric/conducting/resistent/magnetic behaviours?
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Apr 06, 2014, 08:49 AM
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magrinsi's Avatar
http://www.yge.de/artikel.php?search=ygeopto + ubec ..and no holes in the ground
Apr 06, 2014, 12:42 PM
"The Judge"
sebbe's Avatar
I guess maybee its not a bad Idea putting dual wires on everything...
Look at CC Hydra esc:s...
Apr 06, 2014, 01:18 PM
Registered User
p901P901's Avatar
Sebbe: Yes looks good.
On the hydras looks like they put electrolytics on all the fet boards. If you did this with the YEP 150s then you will need to add some ceramic .1uF caps. These caps will be for high frequency filtering (switching) and the electrolytics will be for storage and low frequency filtering. On the YEPs they have one ceramic on one FET board. Two .1uF ceramics in parallel to two 470uF electrolitics should stop switching noise on the battery lines. Do use a receiver battery with these ESC's
Last edited by p901P901; Apr 06, 2014 at 02:02 PM.
Apr 06, 2014, 01:37 PM
Registered User
magrinsi's Avatar
Quote:
Originally Posted by magrinsi
Anothet Yep ...assasin..

The excite of my friend r.i.p.
After have put 8khz from 12khz of pwm....
But from the photo do you mean what is the component burned?
Apr 06, 2014, 01:39 PM
Registered User
magrinsi's Avatar
.......
Apr 06, 2014, 02:03 PM
"The Judge"
sebbe's Avatar
p901P901 , look at the Picture from magrinsi , looks like the lowest fet board also do have the ceramic cap?
Apr 06, 2014, 02:10 PM
"The Judge"
sebbe's Avatar
Ive just checked, there is a ceramic cap on both fet boards, one on each...Is that enough?
then just add 2 electrolitics caps on top + extra wires......

Or is it critical to add even more ceramic caps?
Apr 06, 2014, 08:10 PM
Registered User
p901P901's Avatar

100 amp YEP


Probed the battery cables near the plugs. Have to re-due the test due to low battery voltage. There is about 1 volt ripple on the battery wires and about the same frequency as the frequency set on the controller. Need to make sure current and speed is the same for all the test for accurate results.
What I thought was a FET switching waveform looks more like a clock waveform set by the controller. Amplitude does increase with an increase in speed. I can see random spikes on top of this waveform, but do not now if this is causing problems with the controller.
Last edited by p901P901; Apr 07, 2014 at 02:21 AM.
Apr 07, 2014, 03:37 AM
"The Judge"
sebbe's Avatar
NIce going,,, keep the data flow so we know if it gets better after adding caps..

I will buy some ceramic caps these week, and I hope my Panasonic caps arrive today

I can not scope anything as I dont have any oscilloscope, all I can do maybee is measure temps before and after the mods..
Apr 07, 2014, 03:41 AM
"The Judge"
sebbe's Avatar
p901P901 , are you sure the stock ceramic cap is 12uF??? seems a lot to me.... the biggest ceramic cap I can find in store nearby is .22uF,,,

http://www.kjell.com/sortiment/el/el...-224-st-p90498

Are you sure that small stock is 12uF and not 12nF ?
Apr 07, 2014, 04:41 AM
Registered User
p901P901's Avatar
The leaded ceramic caps I installed are .1uF 50V http://www.radioshack.com/product/in...ductId=2062365.
The surface mount cap was measured at 10uF.
I still need to see if adding ceramic caps are really necessary. I did not run up to full speed and take comparison measurement with caps installed. Last test I did not measure the current while running some partial speed test. Batteries were 40% charged so I need fully charged batteries with a constant current to make a valid test. I also need to probe the controllers power supply to see if there is any ripples.
Last edited by p901P901; Apr 07, 2014 at 02:03 PM. Reason: Caps were 10uF on the FET board
Apr 07, 2014, 08:07 AM
"The Judge"
sebbe's Avatar
ok, thanks, we will be waiting for your test and conclusion then

My caps arrived ,, now we need to know if those small ceramics are critical or not, if not, then I will begin my transformation
Apr 08, 2014, 04:55 AM
Registered User
p901P901's Avatar
Consulted a fellow member and what was said about this ripple "Depending on the load it could be quite normal."
So you can add 2ea 470uF 35 volt caps to each board with the jumpers. So each cap will carry 37 amps for a 150 amp load.
The bad thing about this at 1800 uF total capacitance is that there is going to be a big initial spark charging these caps. Also looks like the ceramic caps will not be necessary for this application.
So press on.


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