oldskoolhead
10 W
i have recently purchaced a 500w kt controller for my trike,
i set out on a journey and the bike started to missbehave, it would set off at full speed then lose power and go slower,
if i turned the bike off and on again it would set off at full speed again only to quickly drop down to a reduced speed again till eventually it just cut out all together and the wheel locked momentarily and then it wouldnt switch back on.
i got home with it and looked at the controller and the power cable at the xt60 connector had burned off like a fuse, so i tested the controller end and this was shorted so i opened the controller to inspect it but could see nothing burned so i tested the mosfets with a multi meter to find the middle bank of 3 mosfets were all showing shorts accross all pins, the other 6 were fine,
i have contacted the supplier on aliexpress and he recons its 1 of 2 problems, 1 bad wiring, which is bollocks and 2 the motor is too powerfull for the controller, which is also bollocks, it is a 500w bafang hub and the controller is 48v 11a/22a max, the one that came on the bike is 48v 9a/18a max and is working again (as my problem was just the julet 4 into 1 cable and not the controller as id thought)
so my trike is working again with the original controller and display, but this is besides the point, i wrote to him and said this in not so many words but he is now ignoring me so i have decided im going to attempt a repair myself and change out the 3 shorting mosfets.
so my question is
1) if i cut out the bank of shorting mosfets and test the power line that the short is gone once the mosfets are removed can i power on the controller and test if it works (ie should it work (either power up and display and/or work as normal at a reduced current))
or 2) should i not attempt to power it on until the mosfets are replaced?
all info much appreciated tia
i set out on a journey and the bike started to missbehave, it would set off at full speed then lose power and go slower,
if i turned the bike off and on again it would set off at full speed again only to quickly drop down to a reduced speed again till eventually it just cut out all together and the wheel locked momentarily and then it wouldnt switch back on.
i got home with it and looked at the controller and the power cable at the xt60 connector had burned off like a fuse, so i tested the controller end and this was shorted so i opened the controller to inspect it but could see nothing burned so i tested the mosfets with a multi meter to find the middle bank of 3 mosfets were all showing shorts accross all pins, the other 6 were fine,
i have contacted the supplier on aliexpress and he recons its 1 of 2 problems, 1 bad wiring, which is bollocks and 2 the motor is too powerfull for the controller, which is also bollocks, it is a 500w bafang hub and the controller is 48v 11a/22a max, the one that came on the bike is 48v 9a/18a max and is working again (as my problem was just the julet 4 into 1 cable and not the controller as id thought)
so my trike is working again with the original controller and display, but this is besides the point, i wrote to him and said this in not so many words but he is now ignoring me so i have decided im going to attempt a repair myself and change out the 3 shorting mosfets.
so my question is
1) if i cut out the bank of shorting mosfets and test the power line that the short is gone once the mosfets are removed can i power on the controller and test if it works (ie should it work (either power up and display and/or work as normal at a reduced current))
or 2) should i not attempt to power it on until the mosfets are replaced?
all info much appreciated tia
