CanadianWinters
100 W
Hi guys,
this is my first controller mod.
A few weeks ago I got a 72v hua tong controller that I wanted to try on my 500W Bafang HT rear setup.
I tried the hua tong and there was no way to make it work with the Bafang, I spent an entire evening checking the phases and hall wires but there was no way to make it work so I concluded that I probably have a broken/faulty hall sensor .
The KU123 controller can run sensorless and it works perfectly on my setup but the capacitors inside are 63v and the mosfets 70v or 75v (I can't find the datasheet). I still wanted to try a 20S li-mn makita pack on the bike.
Having a spare KU123 controller I decided to do some surgery and take the mosfets and capacitors from the hua thong and implant them into the KU123.
The photos can give you a more clear explanation:
I tried the bike today and it works great. I hit 55kph
The next step is to cut one of the shunt to reduce the Amps to 15-20max (now is 30-35 max) so I don't overheat controller and motor.
I love this cheap controller!!
8)
this is my first controller mod.
A few weeks ago I got a 72v hua tong controller that I wanted to try on my 500W Bafang HT rear setup.
I tried the hua tong and there was no way to make it work with the Bafang, I spent an entire evening checking the phases and hall wires but there was no way to make it work so I concluded that I probably have a broken/faulty hall sensor .
The KU123 controller can run sensorless and it works perfectly on my setup but the capacitors inside are 63v and the mosfets 70v or 75v (I can't find the datasheet). I still wanted to try a 20S li-mn makita pack on the bike.
Having a spare KU123 controller I decided to do some surgery and take the mosfets and capacitors from the hua thong and implant them into the KU123.
The photos can give you a more clear explanation:
I tried the bike today and it works great. I hit 55kph
The next step is to cut one of the shunt to reduce the Amps to 15-20max (now is 30-35 max) so I don't overheat controller and motor.
I love this cheap controller!!
8)