ZOMGVTEK's 2011 Build Thread...

[ZOMGVTEK]

My motor always did 24-26 MPH at 48V. It never went faster than 26 MPH, on 12S LiPo or 48V of Lead. The older GM hubs were higher speed than these.

[ZOMGVTEK]

Is it a bad idea to entirely submerge the motor? We used to do it all the time.

The blue NEXT bike my fried had was taken out of commission after the front rim cracked. It was easier to just get a new $150 bike, which rides WAY better anyways.
It was less than 2 hours to get the new bike up and running.



Here is all 3 bikes together. Identical setups, on assorted cheap bikes.



Heres a fairly low quality video thrown together with assorted clips, intended for another purpose.

http://www.youtube.com/watch?v=ijzDT1Bz6u0

[ZOMGVTEK]

I had the controller flashed to 60A after the hall failed, and the CA was reading about 95A peak. I dropped it down to 40A, and its now reading 65A peak, average of 4400W during acceleration, and its really not notably slower. I raced my brothers bike that I normally SLIGHTLY pull on, and he had slightly more mid range punch, same at the low and high end. I was abusing it fairly good and the motor stayed cool to the touch, only slightly smelled. I don't think the motor is putting out any more power past 60A or so... I will try messing with it more, bump it down to something like 20 just to see, then up to 80 in increments of 5.

I inflated the tires to about 60PSI and I save about 300-400W at 40 MPH, its down to below 2KW.

[ZOMGVTEK]

Mounted up the chargers onto a board, hanging in the garage. Also made one torque plate, the other one will be done sometime in the future.

[ZOMGVTEK]

My bulk charger is done. 4x Meanwell SP-500-24 in series, 4.1V/cell target, rated at 20A, set to about 15A.

[ZOMGVTEK]

After much hassle, I managed to get a thermistor in the windings of the motor. Its jammed under a bunch of windings, and held in by a dab of silicone. I put it in the area I suspect to be the hottest portion. The display itself isn't yet mounted, but I warmed the motor up to the point where it starts to feel 'soft' on regen and hooked it up. I normally take the motor a bit past this daily, and the thing claims it was 142ºC... I suppose thats why my windings are dark.

This motor heats rapidly at 6-8kW. I need to find a good way to get some serious airflow over the windings, the bike is too slow on 6kW, 8 gives it a bit more pep.

[auraslip]

Man you go all out! Very nice setups!