You use your super caps, I feed the ducks...
Druckbare Version
You use your super caps, I feed the ducks...
You should enjoy that........Zitat:
Zitat von Sika
Quack!
Anhang 69061Anhang 69060
Tried and true traditional 7500uf AL electrolytics cap banks I built .I piggy back with small ceramics across the leads.
but heres photos of a supercap amp that passes 70 ampereshttp://www.freesmileys.org/smileys/s...stirthepot.gif
Anhang 69058
Anhang 69059
http://www.freesmileys.org/smileys/s...rum/trolls.gif
..
Good day all. Happy birthday Christian, . Here look at the components for the BLDC. You dream 6 phase controller in theory the bridge just adds 3 more high low channels with possibly additional current watchdogs using a shunt and op amps. Ir also just sent me a letter of a new 60 volt "strong fet". I havent had time to look at it yet.
https://encrypted-tbn3.gstatic.com/i...MT05X1IlA5D_zg
Happy boating
Hubert
Anhang 69474
Christian, one thing about materials that wasnt discussed on the other forum in the US was the magnetic properties and how some metals lose, change, or maintain their magnetic properties in heat treatment processes, I thought of this when Micheal made a comment about the stainless steel shells magnetic properties not being ideal and the 440C stainless, in the prop thread, that maintains its magnetism though all heat treatments. I do not know if this would be a good thing in that specific case, but I do wonder about the can of an outrunner and the ideal materials from which they should be made. You had one that lost its roundness due to high rpm, I remember the wire fix but wonder what materials would give you the ideal mechanical properties for high rpm but also exhibit excellent electrical properties? I would also like to know more about the SNK bearing you run.
Thank you for your time gentlemen
Hubert
Greetings gentlemen. Looking at the TI insta spin video and reading a microchip app note, It seems that it is just a fancy name for Field oriented commutation.In a non - hall format this seemed to me to be the best style for what we do.Is there something better? In the end would it be in anyones opinion that if a high quality controller was to be built it have hall sensor capability?
I know that hacker had released airplane packaged "sinus drive" with motor and controller. I assume using a sinusoidal commutation on a pm motor? Could it be right? I dont know if the airplanes are different as far as demands, but it certainly seems a boats exerts varying load on an electric motor.
http://www.helifreak.com/attachment....9&d=1413857474http://www.helifreak.com/attachment....0&d=1413857474
My Turnigy T600 rework:
Originally 1400kv @ 8 turns delta of unknown small gauge multistrand
4030 stator with 5+6 STSD turns of 1.3mm Fosgate magnet wire.
Kapton and Nomex insulated.
3-100 k rpm capable ceramic hybrid bearings
for practice....
Hope to run ABCABC/ABCABC for parallel or six phase operation.
Remember...... http://www.rc-raceboats.de/forum/att...4&d=1393195687
Hubert
Hit 3,515
Hi Christian, Micheal, Guys...
Just wanted to share where I am at with winding motors now.
Kontronics Pyro 800 6 + 6 YY 1.53162mm (15Ga.) mono wire Kv 485
Hubert
http://www.offshore-rc.com/forum/upl...0415_thumb.jpg
http://www.offshore-rc.com/forum/upl...3066_thumb.jpg
http://www.helifreak.com/attachment....7&d=1447853211
Generated BEMF @ 2,250 rpm
http://i1150.photobucket.com/albums/...pyro%20800.jpg
Pyro 800 7 + 7 YY 15Ga. 420 Kv
Hubert
http://www.rc-raceboats.de/forum/att...6&d=1448130116
I ordered some carbon fiber props to load motors and log the data.
Hi Hugh,
be careful ,this motor can power yourself standing on a surfbord . Good job .
Thanks Chris,
Safety will be in place.
Hubert
Anhang 82697
apc1708e ( 432mm X 203mm)
Products came.
Hi
http://www.offshore-rc.com/forum/upl...6606_thumb.jpg
HK III 4035 two strands of 16 Ga.(1.35mm measured) 3 + 3 parallel wye ~ 990 Kv
Termination for parallel wye. The two strand groups weren't too difficult to manage.
Anhang 82785
Hubert
http://www.offshore-rc.com/forum/upl...2551_thumb.jpg
Free from the ESC I used the "drill method" and calculated a kv of a 1040 Using the oscilloscope and a electric hand drill rated at 2250rpm.
On the Castle Ice I logged an Io of 4.4 amp @ 22.5 volts the Kv was logged at approximately 1190. I take the Rm measurement using 4 wire method. A 2250mah 3s lipo a 10 watt 20 ohm resistor and two DMM's. I will report back shortly.
Thanks
Hubert
Anhang 82865
I started a 7 turn LRK YY on a 40 x 30mm Turnigy T600 stator with 13 ga. (1.91516 mm) If it returns a good numbers I think the MKIII 4025 I have here will be wound similarly. Maybe it will suffer badly from skin effect and I wont.....
http://www.offshore-rc.com/forum/pub...ault/coule.gif
Happy Boating
Hubert