solarbbq2003 wrote:at 82.4volt no load rpm of 978rpm in 26" rim equates to 121km/hr with v2
At 35amp with my 3 wheeler at 82volt getting a bit over 50km/hr in 26" rim on flat road with fairing,
Have been testing x5303 running on 86volt 35amp v2 controller, Top speed with wind behind trike and slight downhill was 79km/hr.
86volt is fully charged 72volt lithium cobalt system
a) It seems that your 3 wheeler is of 26" rim!?
b)If so, at 50kmh top speed on flat (about 41% of no-load speed), the 3 wheeler is limited by the battery current limit of 35A.
The motor current could be about 2.4 times of the battery current (about 85 A).
And it will cause an high current ripple in these 100V capacitors (order of 85A)
c) If so, at 79kmh top speed on slightly downhill ( about 65% of no-load speed), the 3 wheeler is also limited by the battery current limit of 35A.
The motor current could be about 1.5 times the battery current (about 53A).
And it will cause an high current ripple in these 100V capacitors (order of 53A).
d) These high motor current and high current ripple will damage the weak tracks on the pcb board.
e) IMO. The damaged tracks caused open-circuit and the induced high voltage spikes (due to the motor inductance) damaged the FETs.