Motor/controller suggestions for Yamaha XT225 conversion

[JRP3]

I suppose I could but I'd rather go higher voltage/lower current. Not sure if some of the higher power controllers would even work at 44 volts.

 

[The Toecutter]

A new FOC controller that can go up to 130V may be coming out soon:

https://endless-sphere.com/forums/viewtopic.php?f=31&t=99621

If you haven't found a solution by the time this comes out, it is something to consider. Most ebike/e-motorcycle controllers are made for 72V nominal and below, so two 44V packs in series makes finding a suitable controller of sufficiently low weight a bit difficult.

A Sabvoton SVMC96120 *might* be enough controller to meet your needs, although it only does 5 kW continuous. If you decided to go with the 4 kW QS middrive motor, it would probably be a usable match(if only barely so. Consider going from the motor's rated 72V to 96V would make the continuous power a bit over 5 kW). If your bike turns out to have okay aerodynamics, 5 kW may allow 55 mph cruising on flat ground. Even if the bike requires 6-7 kW to cruise at 55 mph, it is also possible that your battery could be drained before anything overheated or failed. I do believe the MOSFETs in this particular model of controller are rated for 120V(whereas the ones in the 72V versions are rated for 100V).

If you're in a rush to get this on the road and specifically insist on 88V, then this is about the best solution I've come across, even if it's not a complete or ideal solution. It's probably slightly less than what you really need.

 

[larsb]

Don’t have too large faith in the powervelocity line of controllers, it’s three years and counting since their new controller was announced. I bet they have quite long way to go, especially now with the component shortages.

 

[JRP3]

Don’t have too large faith in the powervelocity line of controllers, it’s three years and counting since their new controller was announced. I bet they have quite long way to go, especially now with the component shortages.

At this point I think I've talked myself into trying the Fardriver. I have 2 other future projects which will use larger motors and need the higher power so if I can figure out the Fardriver for this project the others will be easier.

 

[SlowCo]

Great conversion plans.
Can the battery packs provide the current that the QS motor can handle?

 

[JRP3]

Great conversion plans.
Can the battery packs provide the current that the QS motor can handle?

They are rated at 150 amps continuous and I'll have 4 kWh of capacity so they should be able to. jbork is using the same batteries with a QS motor: https://endless-sphere.com/forums/viewtopic.php?f=12&t=109878&start=300#p1711454

 

[j bjork]

No, it is not the same.
Mine is from a vw passat gte, 37Ah. Those you have are something else, probably the same as another builder here uses, but there was no info what they are from.

Edit, here: https://endless-sphere.com/forums/viewtopic.php?f=12&t=116813

These seem to come from a recall because of bad welds:
https://oemdtc.com/7242/22e005-high-voltage-battery-may-fail-samsung-sdi-high-voltage-battery-packs

Some ford seem to use them, as ford was mentioned in the campaign.

 

[JRP3]

The case looked the same so I assumed they were the same. Are yours Samsung cells?

 

[JRP3]

Edit, here: https://endless-sphere.com/forums/viewtopic.php?f=12&t=116813

These seem to come from a recall because of bad welds:
https://oemdtc.com/7242/22e005-high-voltage-battery-may-fail-samsung-sdi-high-voltage-battery-packs

Some ford seem to use them, as ford was mentioned in the campaign.

Good find, I guess I'll have to check the welds carefully and check them for signs of high resistance.

 

[SlowCo]

The case looked the same so I assumed they were the same. Are yours Samsung cells?

You have FoMoCo (Ford Motor Company) cells. As you seem to assume a lot it might be wise to check the actual continuos amp rating. And if you put them in series then the amp and kWh rating don't double.

 

[JRP3]

You have FoMoCo (Ford Motor Company) cells. As you seem to assume a lot it might be wise to check the actual continuos amp rating. And if you put them in series then the amp and kWh rating don't double.

The amp rating doesn't double but the kWh certainly do. 44Vx47ah= 2.068kWh 88Vx47ah= 4.136kWh

FoMoCo doesn't make cells, the sticker says Samsung.

 

[SlowCo]

My mistake as I meant Ah instead of kWh.
What are the continous and peak amp rating of these packs?

 

[JRP3]

Continuous is supposed to be 150 amps, don't know peak rating.

 

[amberwolf]

As for the Astros, I was going by a combination of manufacturer's specs and what I've read on this forum. I haven't seen hard dyno data for them.

There is a reference to dyno data here:
https://endless-sphere.com/forums/viewtopic.php?f=28&t=114866&p=1699797&hilit=Astro%2A+dyno%2A#p1699797
https://www.avdweb.nl/solar-bike/hub-motor/tongsheng/efficiency-bldc-motor-tongsheng-tsdz2-and-astro-3205-compared

 

[JRP3]

3Shul looks promising

https://endless-sphere.com/forums/viewtopic.php?f=30&t=110371&p=1730934#p1730934

https://3shulmotors.com/?v=7516fd43adaa

 

[JRP3]

QS has a new 4K motor with gear reduction that would probably be perfect for my bike, $430. Thinking of pairing that with the CL700 from 3Shul.

QSMOTOR,0.5-12kW Electric Hub Motor & Mid Drive Motor Manufacture China

QS 165 looks like a good addition for bikes / light weight moto's.

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