scooter controller replacement needed

izeman

1 GW
Joined
Jun 21, 2011
Messages
5,132
Location
Vienna, Austria
a friend asked me to repair his broken scooter. it had 3 lead acid batteries which have been replaced by a 12s a123-20ah pouch battery by me some time ago. the scooter stopped working somehow.
i tested the BRUSHED motor by attaching 12v to it and it started to turn. i opened the SUPER little controller and found shorted fet(s) inside. i'm not interested to replace them (only if i have to) - i'd just like to swap the little 6fet controller.

it's a DMHC model OK10S. says 36v/1000w. current 35/18a - whatever this should mean?!
dimensions: 9.3x6.7x3.2

the problem is that the controller has inputs for brake light, brake lever, head light, indicators, ingnition, throttle, etc ... so quite a lot. i don't know if this is standard for scooter controllers - but probably is.

can someone please suggest a valid replacement? i know quite a lot about sensorless bike controllers, but this sensored stuff is new to me :)

dmhc has only this controller on their website of which i don't know if it will replace the one i have.
http://www.e-dmhc.com/esanli-87.html

thanks

IMG_0332.JPG
 
no, that doesn't make sense. it is a three terminal device? if so it should be either dual cathode diode or mosfet so you can test with a diode tester and it should not be a diode.
 
i did a little searching on aliexpress and i guess i will just buy that one:
http://www.aliexpress.com/item/High-Quality-1000W-36V-DC-Brush-Motor-Controller-with-9-Plugins-for-Foldable-1000W-Electric-Scooter/1061330220.html
for THAT LITTLE money sourcing replacement parts, removing the broken ones, soldering new ones, testing ... is just not worth it. as much as i hate this "throw away economy" in this case i will order a new one and keep the old one fore spares.
can someone confirm that the posted one can replace my broken one?
 
dnmun said:
no, that doesn't make sense. it is a three terminal device? if so it should be either dual cathode diode or mosfet so you can test with a diode tester and it should not be a diode.
when seeing that those are rectifiers i realised that my method of fet testing was complete bs :)
as i said: this is a BRUSHED motor and controller. no fancy brushless 3 phase stuff. this is the old motor technology that i thought was over already :?
 
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