Antonio Zanardo
10 mW
Yes, I upgraded a 36-48V 20A controller in order to stand 115 Volts delivered by my Lythium battery pack.
The upgrading consisted in replacing 6 stock mosfets and three capacitors with six FDP2532 rated 150V 79A and the capacitors with three 100uF 200V.
The bike got an enormous gain in acceleration and speed. However the throttle became extremely sensitive. A very little fraction of a turn could produce a sudden and strong rev up, or, to the contrary, a current drop to near zero. It was very hard to keep a steady speed, as the motor changed continuously its revolutions.
I spoke to the past, as right now the controller is dead. There is a bad short inside. As per Richard suggestions, a test shows that a bank of mosfets blew, and possibly some more components blew with them.
The problem is I am not an electronic expert, therefore it's hard to me to fix the fault without any qualified help. However the excellent power increase I got for (alas!) few days urges me to try every possibility to fix the controller AND to overcome, if possible, the throttle problem.
As a matter of fact, the extreme difficulty to control speed motor could be the culprit of all this mess.
Any idea?
Antonio Zanardo.
P.S. when the short occurred the bms protected very efficently the lithium batteries which did not suffer in any way for the short.
The upgrading consisted in replacing 6 stock mosfets and three capacitors with six FDP2532 rated 150V 79A and the capacitors with three 100uF 200V.
The bike got an enormous gain in acceleration and speed. However the throttle became extremely sensitive. A very little fraction of a turn could produce a sudden and strong rev up, or, to the contrary, a current drop to near zero. It was very hard to keep a steady speed, as the motor changed continuously its revolutions.
I spoke to the past, as right now the controller is dead. There is a bad short inside. As per Richard suggestions, a test shows that a bank of mosfets blew, and possibly some more components blew with them.
The problem is I am not an electronic expert, therefore it's hard to me to fix the fault without any qualified help. However the excellent power increase I got for (alas!) few days urges me to try every possibility to fix the controller AND to overcome, if possible, the throttle problem.
As a matter of fact, the extreme difficulty to control speed motor could be the culprit of all this mess.
Any idea?
Antonio Zanardo.
P.S. when the short occurred the bms protected very efficently the lithium batteries which did not suffer in any way for the short.