Recent content by fellow

I agree, 75V system voltage ( using low Rds_on 150V mosfets) is very logical choice for safety and many other reasons. Not sure about the USA, but in the Low Voltage Directive in the EU states 75VDC as the absolute allowed maximum voltage for "portable" equipment.

[spoiler=liveforphysics]Infineon has very interesting IPP110N20N3 200V TO220 mosfet, Rds_on 11 mOhm. Two or three of those paralleled... IPP051N15N5 is their 150V version, Rds_on 5 mOhm. Very suitable for sub 75V systems...

This is what I saw in my dream, compact parametric SynSR outrunner for ebikes: Straight stator version (0 deg skew): 203mm brake disc for size comparison: Winding scheme by http://www.bavaria-direct.co.za/scheme/common/ : Skewed stator version (10deg): Technical data...

One possible choice is Littelfuse 0326015.MXP 15A, 125VDC, slow blow, ceramic 6mmx32mm. Sizing(15A): 15A=4h continuous, 20A=1h continuous, 30A=5 to 60 seconds. In reality, those 15A fuses never false-trip at 15A peak and can be used all day long, so sizing is really simple - just pick your peak...

For 20A use, there is Sanyo NCR20700A. A version has less capacity than B version (3.1Ah~3.3Ah vs 4Ah~4.25Ah), but I_max=30A short burst. Pdf of the A version is here http://akkuplus.de/mediafiles/Datenblatt/Panasonic/Panasonic_NCR20700A.pdf

Sanyo NCR20700B 4250mAh cell pdf is here: http://akkuplus.de/mediafiles/Datenblatt/Panasonic/Panasonic_NCR20700B.pdf Current price in EU is 14€/piece, but it is expected to drop soon. Specifications Rated capacity 4000mAh. Minimum capacity 4050mAh. Typical capacity 4250mAh. Charging voltage...

Report after one year: The first prototype was generally extremly reliable, controller has almost all of its bugs solved and the batteries are working as a charm. Two smaller bugs remains, it needs 5 seconds delay after switching on without the LCD screen conencted, otherwise it stalls if I'm...

Your version has 22A peak current limit instead of 14A, not sure if it is sine/vector/FOC or not. It should be very obvious, as the sine controllers are very silent. S06S V1 (before 2014) has the full date inprinted (2012-09-16 for example). Difference is the positioning of the LVC SMD resistor...

I've updated my second post with a better picture :D . There is already modified 13s (48V) version of the S06S on aliexpress for about 40USD with P&P. For 14S,the modification is the same as for 75V i.e. 100V capacitors, 400V snubblers (red capacitors) and 100V mosfets. You have to play with...

Here you go, slightly modified S06S V2 (2004- ):

This is not the S06S controller. Both versions of the S06S controller has LM317 regulator closer to the left (capacitors).

Ebike specific chains: http://www.kmcchain.com/en/search.php (pick "e-bike" on the list on that page), or http://www.connexchain.com/en/e-bike-chains.html

Fuse or strip/fuselink, it does not matter as long as You have the correct conductive fuse area. To calculate it for Ni, see Cu fuse area values bellow and derate it accordingly. I see that your cells are of different type (mixed red and green), this is not recommended att all. Recommended...

You have only two wires, TX and RX (green and yellow). If you connect your display or arduino the wrong way nothing happens.

Ti CSD19536KCS 100V, 2.3mOhm.