Thai-lad Posted June 29, 2018 Share Posted June 29, 2018 We all know that a chain is only as strong as the weakest link. And fuses, by design, are supposed to be that link. So including a fuse in a circuit should, if it's sized correctly, be the limiting factor for how much current the system can supply to the motor. Therefore I am wondering if the lower reported rate of repairs on Kingsong vs Gotway is due, at least in part, to the fact riders can replace their own fuses without returning the unit to the dealer? And if this results in cutouts that the electronics might otherwise have been able to avoid (the fuse being the weakest link of the overall system). My question is how many riders have experienced a cutout due to a blown fuse vs how many Kingsong owners have had to replace the control board or baterry pack because the fuse didn't blow in time? Is the fuse doing its job? Or more harm than good? What's everyone's opinion on that? I ask because I'm looking to get my first EUC, and choosing a KS14 or KS16 seems like where I will end up. Are any other brands fused? Link to comment Share on other sites More sharing options...
Chriull Posted June 29, 2018 Share Posted June 29, 2018 5 hours ago, Thai-lad said: What's everyone's opinion on that? I ask because I'm looking to get my first EUC, and choosing a KS14 or KS16 seems like where I will end up. Are any other brands fused? Inmotion have fuses, too. Gotways have none. Ninebot imo also not - at least my e+ had none... My KS16B blew the fuse once, after the leg of the big capacitor broke - so i had to get a new motherboard anyway... This capacitor leg problem happened with ?quite? some of the ?early? Ks16b. No blown fuse or problem so far with ks16s. I also can not remember of any report here of ks16s or inmotion fuses blown. Link to comment Share on other sites More sharing options...
Hunka Hunka Burning Love Posted June 29, 2018 Share Posted June 29, 2018 Gotways got fuses. They're called MOSFusETs. Link to comment Share on other sites More sharing options...
mrelwood Posted June 30, 2018 Share Posted June 30, 2018 19 hours ago, Hunka Hunka Burning Love said: Gotways got fuses. They're called MOSFusETs. Priceless... Earlier Msupers even had a backup mechanism, ”fused cabling”. On 6/29/2018 at 4:50 AM, Thai-lad said: We all know that a chain is only as strong as the weakest link. And fuses, by design, are supposed to be that link. So including a fuse in a circuit should, if it's sized correctly, be the limiting factor for how much current the system can supply to the motor. What if they could be sized incorrectly? Perhaps the fuse could be sized so that it would not be the weakest link, but it would only blow if something else already burned? And the burned component would’ve caused the excessive current. Link to comment Share on other sites More sharing options...
Thai-lad Posted June 30, 2018 Author Share Posted June 30, 2018 Well you always have the option of replacing the fuse with a wire link, either soldered to the holder or inserted in place of the fuse. In which case you might get the minor Gotway style battery meltdown that Marty experienced (if you're lucky as he was -- that could easily have turned into a burning ring of fire!). Or, as Hunka cleverly put it, a blown MosFusET might be the end result. On the other hand, if the current surge is only transient, the system might tolerate it and continue on normally. So far I haven't seen any recent post where a blown fuse resulted in a faceplant. Therefore, I'm guessing that the fuses are rarely triggered by riders, short of dunking the whole EUC in water or something similar. Link to comment Share on other sites More sharing options...
US69 Posted June 30, 2018 Share Posted June 30, 2018 On 6/29/2018 at 9:04 AM, Chriull said: Inmotion have fuses, too. Gotways have none. Ninebot imo also not - at least my e+ had none... My KS16B blew the fuse once, after the leg of the big capacitor broke - so i had to get a new motherboard anyway... This capacitor leg problem happened with ?quite? some of the ?early? Ks16b. No blown fuse or problem so far with ks16s. I also can not remember of any report here of ks16s or inmotion fuses blown. Exactly because of the same reason i also had a blown fuse on a 16b...and faceplanted nicely ? First the capacitor leg burned...and makes the wheel a „sea ship“...stupidly i ride on and than the fuse blowed as without caps no board will work long. That was a common known failure of all Ks16b for board version 1.2. 
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