I think it's already wired as WYE, but yeah if it was Delta, I would do better to rewire it. However, at 113kv and 98 volts that's 11,000 RPM. At 6.79:1 or 13T to 88T that gets wheel RPMs down to 1620 RPM or a top speed of about 60mph for my size tires. Wheels sprockets are cheap. I have an 88T wheel sprocket, but larger are readily available for $15 or so making it possible to change the gearing up or down easily enough. Same for motor sprockets. I have a couple of adapters coming that convert the 1/2" motor shaft to take 3/4"219 motor sprockets. Basically gearing wont be a big deal.Ianhill wrote:I would say your motor will run if all the other motors follow the same setup, I don't nw why but thats how I thought it worked at first and then a bit doubtful as mentioned, If you dremil for the halls make sure to spray it with a insulating lacquer.
I wonder the winding arrangement of the astro as its based on rc is it terminated delta could be a interesting motor if it is looking at the coils packing there's no more turns to be gained but if it could be rearranged to a wye that would lower the kV a fair bit make it more manageable.
I've run it at 48 volts with no load and it's pretty quiet, but that's only 5400 RPM. Torque will be good regardless of the voltage I run at. I'll just need to gear differently.Ianhill wrote:I don't think 48v on this motor will he boring I bet it hits at least 50mph when all done sweet, Mind doubling the pack up be a hefty overvolt be revving as high as an f1 engine, I would love to hear a motor capable of spinning up to 20000rpm and not self destructing the scooter sound like an angry dremil.
I wont be riding off road on this thing so the unsprung weight of a large hub wouldn't be a huge deal. Running an inrunner right at the pivot point on the back end would virtually make the motor "sprung". The only thing I really like about hub motors is that it's in the wheel rather than mounted elsewhere. This makes transferring drive to the tire uber simple, but it also creates several limitations. There's no gearing for the ideal set up. I guess I could rewire for switching from WYE to delta to get better top end. That works for any BLDC. On my kick scooter I tried out a 16T driver and I got no more top end out of the motor than I did with the 15T driver...just more current draw and a hotter motor. As a result I have gone back to the 15T. Oh well all that stellar torque just gets me going quicker. I was already running the best set up for that machine. With a hub, you can't mess with gearing. It is what it is and a small diameter tire needs a hub with a higher Kv or else all you have is stupendous torque, but pathetic top end. With an external motor, you set gearing and voltage to get what you want (within reason). Also, high Kv motors tend to be more efficient than low Kv motors. OK yup...probably wont go the hub motor route, LOL. But if I had the hub motor to try out that had the wattage I wanted, well that would be different!Ianhill wrote:I'll be honest with you if I could get a powerful hub motor at a decent price I would be very tempted to utilize it, from what ive learnt it will be more efficient than a small can motor and like you say the mounting is a lot more easier.
There's cracking mopeds in the UK i would love to get my hands on, later model E-max 110 and the vmoto's its 48v 4000w mono rear shock look proper but they are normally a fair bit second hand and need some love on the battery and controller front as they run 48v 60ah silicone slas, I wreckon with just with some cheap 20wh lipos and a cheap sunwin on 20s it will reach over 50mph easy with decent range it may be my next project .
I've put out feelers for different hub motors in the 3KW+ range and I'll know more soon enough. I would want a hub motor with a fairly high KV for a hub. Lots of watts and a high Kv would make for a decent hub setup. The wheels on the moped are 52 inches around or it takes 1218.5 tire rotations to go 1 mile. So to go 55mph that's 1121 RPM. That would require a hub motor with a 23Kv at 48 volts to get 1121 RPMs. A 30Kv hub at 4000 watts would be nice and powerful and at 48 volts would get a nice solid 60mph....if such a hub motor exists. I guess I could just get a 4 or 5Kw hub and then rewire it for the KV I wanted it it doesn't already exist for a decent price. I'm patient and don't have to solve this "problem" today when I already have two 3220's that will do great.Ianhill wrote:Yeah the top speed can be slightly messaged with voltage tyre profiles etc but it is what it is with the hub like u say the weight placement disadvantage etc too doesnt help it but for a moped I think it could work if the perfect hub for ones needs presented itself but once its done it is what it is, I think it wouldn't suit well on a superbike etc but a moped with high centre of gravity doesn't do to well at high speed anway so it a good marrage and thats half the fun we these why they feel good to ride a perfectly setup frame would be so tame at these powers it would cry out for more and feel slow.
I think you mean 219 chain?Ianhill wrote:I like the sprocket adapter good work, A bigger chain is next on my list the existing t8f is on its last legs so rather than spend money down the wrong avenue I'll get all new 419 ive spotted that the KTM 50 sx 2009 uses a 15mm oval/H sprocket so a adapter like yours will work a treat with that for me I'll be inline for uping the power then.
24S is 98 volts....close enough to 100v.Ianhill wrote:I feel your need for speed, but with the budget I'll be 24s max.