John in CR said:
I have a Grin Analogger that I've yet to use. Just like I have a mountain of front/rear unprocessed videos from when I was commuting 40-50km/day depending on route, I'd pile up data files if I logged rides.
Did you measure the original Kv of your motor, so you can know if you've done permanent damage to the magnets? Did you measure the phase-to-phase resistance? That's a good thing to do to confirm that your motor has no winding errors (measure all 3 combo's of phase-to-phase to make sure they're equal), and it gives you a solid base to give you an idea of how much heat you create at different current levels.
Since you voice opposition to small wheels, then you must be riding off road, in which case I'm sorry but a hubmotor isn't an appropriate solution.
I WOULD LOVE TO SEE YOUR DATLOGS!
I just leave it running and log everything. Hid in the box with a tape ribbon to pull it out when needed to copy the logs. I probally pull the logs about every 30 power cycles and just peruse a few. I still have like 10,000logs from my EFI days.
Yes they pile up, date/timestamped and in Mb. I just use it ( now that the novelty has worn off) as a tool for troubleshooting and bragging about speed and power, and having a log to look at this or that particular instance on a ride.
Yes, original Kv is same as the Kv now, unloaded, 49.5mph. Did not measure phase to phase.. Will when I have the motor in front of me and disconnected then. For the record. I keep making power.. heat tapers at loaded Kv.. 3Kw contin and the motor does not mind that too much.. you see the ( power or amp) peaks and the (heat)soak very clearly.. the threshold. I began with no rollback.. and baselined from there for management... ( cuttin hairs) and decided based on the build, efficiencies, use case, that hitting 180* afew instants here or there is ok if I ride and sit round 80*-140*. I kinda am still making power ( accel) and the heat has not killed me yet... I thinkinghoping.... Short rides ( 5-12mi, 16 mile is my longest regular trip). Yes, uphill, 100A peak 50contin and loading the hub up up up slow until rollback, it will certainty roll back.
I do have a friend real dynojet here that I can put my bike on any day. If yall would like to know the real rearwheel output. I am pretty sure I only put down about 3-5Hp.. even though the logs show 10Hp ( going into the shunt only).. the rest is wasted in heat. ...BUT..the difference between a set 50A hit and a set 100A hit .. is a whole lota fun. I even feel the power differences 'tween a 80A and 100A hit. I like 100A. Still making power, but yea, more watts mean more waste. Soon to be wasting more than I put down... I would bet.
( OK Thats if now I gotta know..the power down.. : Edit
(From online calculators, on Engineers toolbox)
(https://www.engineeringtoolbox.com/car-acceleration-d_1309.html)
Velocity change: 0-75Kmph
Time: 10sec, full throttle,
Weight: 118Kg bike/rider,
Acceleration: 2.08M/sec^2
Acceleration to gravity: 0.212 g
Distance: 104 meter
Force : 0.246 k(N)
Work: 25.6 k(N)meter
POWERR: 2.56Kw.. also known as 3.43 hp.
Every single one of these figures make absolute sense to me and seem accurate. Given my install. 0-75Km/hr from zero pull taking ten seconds. ( ten seconds to ~45mph) ( and that is even a brag.. it is really like 12 sec, 0 to 40mph.. on the datalogs... 2.5hp and 120m... same work so even more peak heat in all honesty) .
So there. Negotiating the other things, like we all know.. I waste (peak output 7.9Kw) 5,340w ( peak waste heat) that never gets to the ground... Now.. If I can do that in 8sec power is increased and distance is lessened.. and if I can do that in 6 sec.. lookout.. I'm pumping a solid 5.72hp for a 0-75kmph run in only 62.5 meters distance.. alot more umph and alot more force, same work.
No, mostly on road, but the small ( scooter size? lol) wheels (12"-18") I dont like cause of handling. Target tire diameter is ( goodolproven) 23-25".. just like a rocketbike ( xxx/xx/Zr17).. that I have experience with.. ( 3 superbikes in garage right now, dont ride them anymore) . Not talking 26"mtb benefits on my ride, but a tiny wheel would be a squirrel on flicking in and bar flopping, and whatnot.. Gravel trails are fun though still.
So onroad. Hubmotor. Screw (middiedrie) designing close/wide ration trains. Thats for geardesigningnerdswithpocketprotectors. 21"-24" OD. I really appreciate the experience, I know I can be a dick, just tell me Im being a newb cocky dick if yall want. Lol . I try to get all the info I can from yall experiences. Thanks for the humoring me.
You even have a Analogger... Jebus. Quit complaining about people not showing vids Show us your logs. PLS! Lol. I need a benchmark to set my goals to. Data sells. I have though about forcing air. That is easy to make work. After all, I know a turbine scientist... and have thought about simple fan driven air pressure through the hub for the convection and radiation.
I am gonna log everything I can for the rest of time.