the motor runs free, it locked while pushing the board unpowered, but then freed again. Its not a deal with other ESCS ive dealt with but IDK if this could have caused the damage.
Ok if the motor run free when unplugā¦ itās maybe one of the mosfet whoās shortedā¦ because there no protection against overvoltage, wich can damage the gate of a mosfet.
It runs free plugged in too. Can the FETs cause DRV faults?
No if it runnig free when plug, itās probably the drv, sorry
Now itās not giving any more DRV faults, only Under Voltage Fault, motor stutters a bit but doesnt turn. Ordered 3 DRV chips, lets have a go.
Now I get this Fault : FAULT_CODE_UNDER_VOLTAGE Current : 61.5 Current filtered : 63.1 Voltage : 7.18 Duty : 0.28 RPM : 449.4 Tacho : 196 Cycles running : 633 TIM duty : 3520 TIM val samp : 1688 TIM current samp : 7977 TIM top : 12578 Comm step : 6 Temperature : 22.90
yea 7 is definitely undervoltage. Check your cells!
Cells are good. When I just got it, I could do detection on this motor with a current limited supply no problem. Its sounds fishy that the current goes so high. Something is causing the voltage to drop drastically. The motor spins erratically on KB control. I wanted to try reflashing the FW. maybe, who knowsā¦ Funny the DRV faults went away for good.
It could still be the DRV being broken. Maybe itās not providing the correct voltage which leads to the undervolt error.
Fumbling around I can make the motor spin, detection still wont work. The behaviour is very erratic, different from when it arrivedā¦
stranger thingsā¦
Where are you guys getting your DRV8302 from?
I have replaced my DRV but it still behaves the same way. Looks like some commutation problem.
Getting the ABS MAX CURRENT ERRORS. all the time. Motor only stutters.
I have checked the FETS for shorts ( between D and S ) and between G and Sā¦ nothing weird. Thinking about removing them for testing on bench.
Out of ideas hereā¦ maybe next is tracing the gates to the DRVā¦
so frustratingā¦
Sound like a broken motorā¦
No sir, it spins like a boss with my Castle Phoenix 80 HV.
Well regular esc are less sensible than VESCā¦ are you running sensor or sensorless ?
Check all the resistors and caps near the FETs. If your motor cogs without drv errors than you probably have a a poor solder joint somewhere. Look for cold joints and reflow with flux.
did so. reflowed the fets tooā¦ Reflowed the shunts that could be causing the overcurrent issue, no go. Gonna check cont to the DRV gate driver pin.
It looks clearly that a phase is out of order.
Not giving up, not yet hahaha
check your shuntā¦ I suggest to reflow them as well, but check them before.