ctirad wrote:flexy wrote:I have road tested the bike with my ecrazyman 18fet contoller. motor was cogging at slow spped, it smoothed out as I sped up to 20mph, but there was an occasional bump like the motor was missing a beat.
It was drawing 5kw as I climbed a hill , the controller became quite hot and then fets must have blown.
The stock 18fet ecrazyman is rated about 2kW, AFAIC. No surprise it blew. 18fet Lyen is a different beast. I would not afraid to use it.
The best would be some sine wave controller like sevcon or Lebowski controller with a suitable power stage.
BTW, vmoto offers upgrade kit for old e-max 90/110. It consists of sevcon controller and the needed cables. It is actually not cheap, however on the other side it is not much more expensive than some higher spec Kelly controller.
The ecrazyman controller I have has the IRFB4110 fets, reinforced traces and a modified shunt, it regularly pulls 5 - 7KW when climbing steep hills on my smaller scooter, Is there any other reason why the Lyen could handle more power than this?
Do you know what the rating of that upgraded sevcon for the E-max ,is it 48V or 72V?