Change C'lyte3540 to BPM

[Kabbage]

Hi All,

Finally took advantage of the holidays to swap out my C'lyte3540 (see http://endless-sphere.com/forums/viewtopic.php?f=6&t=39940&hilit=avanti) for a BPM 11pole hubmotor. I guess I wanted something a bit lighter than the Crystalyte, less 'obvious', and I was only ever running it at around 1200W, so the C'lyte was a bit overkill.

I tried full-throttles bike with the BPM and it was all good, so bought an 11 pole one from BenMoore here in Melbourne - sweet.

There was a bit of fun getting it to run; I must admit to being a bit daunted by the potential for problems with the wiring, but managed to get the phase/hall combo worked out on just the third try! Wow. I was using a spreadsheet that I found here on E/S somewhere (although mine was *completely* different. First try I got backwards, second try I got grumbling, third try it worked - the spreadsheet generally shows 'nothing' or it working, so a bit confused...).

Of course, as I have discovered with e-bikes, nothing ever goes quite to plan; I have a few questions, and was wondering if anyone could help??

Firstly, the darn disc caliper is too close to the motor cover...





There seem to be two options for this; either just space out the caliper off the supports a little somehow (does someone make spacers?), or change fully to a bigger disc, with the required caliper spacer off the standard mounts). I reckon I can get away with just spacing it on this disc, mightn't be quite full contact, but would be close.

The second thing is that I am just relying on the halls for the speed (I have not changed my CA to have a separate speed sensor - just thought I would ignore it - no major problem, but the speeds it's reporting are way too high - is there some setting on the CA to change this?

Finally, there was someone here in Aus. with the 'chicken motor' 200W stickers - does anyone still have any for sale?

-kabbage

 

[full-throttle]

If the disc can be moved to the left then space it out. Otherwise (or if it's still not enough) get a 180mm disc and adapter. I'm using 160mm with 3mm spacer. Spacers are commercially available and can be easily made, just remember to use longer bolts.

With the speed - go to settings and change # of poles from 23 to 80 (or 40) whatever gets you the right speed reading.

 

[Kabbage]

If the disc can be moved to the left then space it out. Otherwise (or if it's still not enough) get a 180mm disc and adapter. I'm using 160mm with 3mm spacer. Spacers are commercially available and can be easily made, just remember to use longer bolts.

Thanks for your quick response f-t! no room to move left, I don't think - it's right on the limit as it is.... unless I space out the axle as well, I guess - seems easier to go 180mm (but will look weird with it on the rear!)

With the speed - go to settings and change # of poles from 23 to 80 (or 40) whatever gets you the right speed reading.

Oh. I reset this to 18 poles, which is how many it's got.... I thought it would need this to be right for the controller to work with it properly....

thx. mate....

 

[full-throttle]

Oh. I reset this to 18 poles, which is how many it's got....

Don't forget 5:1 reduction :wink: Thought it was 16 poles.

 

[full-throttle]

[EDIT] 16 magnets, 8 poles, so 40 is the number to store on the CA.

It does have 18 slots, that's where you prob got that number from.

Feel free to borrow a 185mm rotor and adapter.

 

[Kabbage]

[EDIT] 16 magnets, 8 poles, so 40 is the number to store on the CA.

It does have 18 slots, that's where you prob got that number from.

Feel free to borrow a 185mm rotor and adapter.

Aha! I just went around the block with it set to 80, and it was way too low; I was going to come in and write that it should have been 40 (which I guessed based on how fast it 'felt')! And you've gone and edited your post to 40! Well at least that explains it all! Thanks, as usual, FT!

And thanks for the offer, I will just go and buy some 180mm kit; probably go local, since I can't work out exactly what it is I need from wiggle or chain-reaction... :-( any shop recommendations for this stuff?

On another note, I really like how it goes - it is *very* very similar to the C3540 - but at about half the weight on the back wheel, and it looks much less imposing. The 11 turn is getting me to 40km/hr on nominal 48v (53v off-the-charger), which is just nice. It is a little louder than the c3540, but it's not so loud as to be distracting. Can't tell how the acceleration compares, it seems pretty similar, maybe a tad better?

- Kabbage