Tweet
I have an unusual project and need some advise. I'm running a 40mm Graupner jet drive with a KB45XL 11 motor-1000kv with a HiModel 200amp ESC. I have run on 6s and 5s packs. This setup only runs for 6sec. using a timer on a surfboard! On the 6s only the motor got warm and all the wiring,esc and battery were cool. After a few runs with 3-4mins. in between, the motor would get hot (100deg.?), expected. On the 5s pack the motor, connectors, and esc would get hot right away. Only 4mm connectors. I would have expected this from the get go with the 6s.
Anyway this thing sucks up 144 AMPS while doing this. Output was 2200 watts. In testing and using this, probably 9o+ runs, I have gone thru 3 esc's, 1st one went about 60 runs then quit, the 2nd one ran 20 times got wet and torched,not pretty), this last one running on the 5s went 20+ runs in testing and finally de-soldered the caps. I tried to fix but no joy.
I know that"s a lot of amps but shouldn't the esc be able to handle that especially for only 6secs at a time with cool off period in between?
I don't know the rpms of the impeller but it seems to be close to the no load rpm.
Of course this thing is only going 5mph instead of whatever, too much load? Any ideas what might be needed to make this work reliably? I'm looking for low speed thrust.
Thanks
Anyway this thing sucks up 144 AMPS while doing this. Output was 2200 watts. In testing and using this, probably 9o+ runs, I have gone thru 3 esc's, 1st one went about 60 runs then quit, the 2nd one ran 20 times got wet and torched,not pretty), this last one running on the 5s went 20+ runs in testing and finally de-soldered the caps. I tried to fix but no joy.
I know that"s a lot of amps but shouldn't the esc be able to handle that especially for only 6secs at a time with cool off period in between?
I don't know the rpms of the impeller but it seems to be close to the no load rpm.
Of course this thing is only going 5mph instead of whatever, too much load? Any ideas what might be needed to make this work reliably? I'm looking for low speed thrust.
Thanks