Hi guys,
sooou I'm looking at replacing the motor in my Cityel (it's got an old, heavy and super inefficient forklift motor from the 1980s) with a brushless motor. I've put the QS 90 1kw in closer consideration, since it weighs 5kg (which should be enough, and also not to much, iron and copper for this low drag, 45km/h, 180kg vehicle, driven in a mostly flat area) and supposedly has an efficiency of >90 %. Also, it's less than 300 € incl. shipping to Germany and VAT, + seems to be of quite nice quality.
Since it's a closed up vehicle, the controller really needs to be sine-wave, so I've already purchased a Kelly KLS 6018S (240 phase amps peak). The battery is 40V li-ion (11s24p, 48Ah).
I've got a few questions regarding this motor: Can someone confirm that it's running well with a Kelly KLS (hall sensor placement wise)? And is it possible to get this motor with a 48V winding (not just reterminated to Delta, as then it won't work with the sine-wave controller anymore due to inaccurate hall sensor placement).
I've also looked at the 3kw golden motor but many people seem to be not happy with it due to thermal conductivity issues, it only has 0.5mm lamminations, and on top of that with 400 € it's even more expensive than the QS 1kw motor (I guess I will have to eat that bullet though if the QS 1kW doesn't work out and I can't find anything better, since so far it's the only 48V motor with about the performance figures I like, that's confirmed to be running well with Kelly KLS controllers).
I'm deliberately planning to let the motor run at a slightly lower voltage than its specified for and gear it up, since that will result in lower stator losses (the Cityel only needs to overcome a drag of ~900W @50 km/h, so the lower the stator losses the higher the range in a flat area).
Since I'm custom building the motor mount anyway and there's practically unlimited space, I can basically put in any motor I want (except for hub motors for a few reasons, mainly high rotational mass).
Any input is appreciated!
Thanks,
Matt
sooou I'm looking at replacing the motor in my Cityel (it's got an old, heavy and super inefficient forklift motor from the 1980s) with a brushless motor. I've put the QS 90 1kw in closer consideration, since it weighs 5kg (which should be enough, and also not to much, iron and copper for this low drag, 45km/h, 180kg vehicle, driven in a mostly flat area) and supposedly has an efficiency of >90 %. Also, it's less than 300 € incl. shipping to Germany and VAT, + seems to be of quite nice quality.
Since it's a closed up vehicle, the controller really needs to be sine-wave, so I've already purchased a Kelly KLS 6018S (240 phase amps peak). The battery is 40V li-ion (11s24p, 48Ah).
I've got a few questions regarding this motor: Can someone confirm that it's running well with a Kelly KLS (hall sensor placement wise)? And is it possible to get this motor with a 48V winding (not just reterminated to Delta, as then it won't work with the sine-wave controller anymore due to inaccurate hall sensor placement).
I've also looked at the 3kw golden motor but many people seem to be not happy with it due to thermal conductivity issues, it only has 0.5mm lamminations, and on top of that with 400 € it's even more expensive than the QS 1kw motor (I guess I will have to eat that bullet though if the QS 1kW doesn't work out and I can't find anything better, since so far it's the only 48V motor with about the performance figures I like, that's confirmed to be running well with Kelly KLS controllers).
I'm deliberately planning to let the motor run at a slightly lower voltage than its specified for and gear it up, since that will result in lower stator losses (the Cityel only needs to overcome a drag of ~900W @50 km/h, so the lower the stator losses the higher the range in a flat area).
Since I'm custom building the motor mount anyway and there's practically unlimited space, I can basically put in any motor I want (except for hub motors for a few reasons, mainly high rotational mass).
Any input is appreciated!
Thanks,
Matt