I'm looking for expert opinions on what type of motor system would be suited for an application where the motor and controller will see high current near 0 rpm.
It will be geared for very low speed. This topic is not about gearing. Top speed is 3mph, but it will see speeds down to 0 at full load.
Do I want a brushed motor?
I've been testing with a bldc ultra low speed hub driving a chain reduction to the axle. I blew a cheap controller because it did not protect itself from high phase current as the rpms dropped from normal range to 0 (stall) under load.
The one option I see is just going with a high power system that will have vehicle traction loss occur as the yield mechanism. I also think a heavy flywheel on the motor may help with high current draw as the rpms drop.
Is there something particularly problematic with a very low kv hub motor (5.5kv) compared to inrunner bldc that spin at normal speeds? My converted tractor using a Motenergy motor and Kelly sinewave controller has no issue running at extremely low rpms (maybe 5%) of rated speed. Though it does have issues starting from 0 rpm with immediate load.
It will be geared for very low speed. This topic is not about gearing. Top speed is 3mph, but it will see speeds down to 0 at full load.
Do I want a brushed motor?
I've been testing with a bldc ultra low speed hub driving a chain reduction to the axle. I blew a cheap controller because it did not protect itself from high phase current as the rpms dropped from normal range to 0 (stall) under load.
The one option I see is just going with a high power system that will have vehicle traction loss occur as the yield mechanism. I also think a heavy flywheel on the motor may help with high current draw as the rpms drop.
Is there something particularly problematic with a very low kv hub motor (5.5kv) compared to inrunner bldc that spin at normal speeds? My converted tractor using a Motenergy motor and Kelly sinewave controller has no issue running at extremely low rpms (maybe 5%) of rated speed. Though it does have issues starting from 0 rpm with immediate load.