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  1. slam

    Zapino scooter with blown controller — my first EV!

    Well, dang. Technically speaking I actually have half of a six phase controller. All the blown MOSFETs are on one side. If I desolder the power to the blown side maybe that would work. =)
  2. slam

    Zapino scooter with blown controller — my first EV!

    I did see the cog test and I hope to run that soon. Winter is coming and I'm less likely to wrench outdoors in the rain. =) Can I test this motor with one controller? Any reason it can't work on just three of the six phase as a test?
  3. slam

    Zapino scooter with blown controller — my first EV!

    I'm 215 lbs and The day before I road 2 miles up and down hills with a low charge. After a full charge I barely got a block away, mostly downhill, at about 25 mph. Doesn't seem like a heavy load. It started to sputter like it was cutting out; this may have been the overheat protection kicking...
  4. slam

    Zapino scooter with blown controller — my first EV!

    Good tip. I'm assuming there's more damage than I can see. There's a few traces that look smoked but show no visible damage.
  5. slam

    Zapino scooter with blown controller — my first EV!

    I supposed the main reason to repair would be cost. It's about $60 in parts to repair, plus my free labor. Since there's six phases I'd need two controllers for a total of $300 (2x 1500W) to $600 (2x 6000W), unless I can find one 6-phase controller somewhere. Plugs don't worry me; I can...
  6. slam

    Zapino scooter with blown controller — my first EV!

    Each phase has one of these capacitors. They are all marked A475T U41KV. All four fets (one whole phase) associated with that blown capacitor are toasted. There's one more blown fet on the very next phase, the capacitor for that phase appears ok. Blown cap: Good cap on opposite controller:
  7. slam

    Zapino scooter with blown controller — my first EV!

    Stock battery config is 60V, yes. The previous owner didn't detach the MOSFETs from the heatsink bar, but the bar itself is bolted to the controller case. That's where the paste was thin because the controller had been disassembled and reassembled without new paste. I think there was...
  8. slam

    Zapino scooter with blown controller — my first EV!

    I'm thinking of upping the voltage a little too, if/when I switch to Li-Ion batteries. I wonder if the MOSFETs take power right from the batteries of if the voltage is stepped up somehow. I suppose I could hook the controller up to the battery and measure voltage at the fets.
  9. slam

    Zapino scooter with blown controller — my first EV!

    Thanks Wally. But can I get away with replacing only the damaged fets if I use exact replacements?
  10. slam

    Zapino scooter with blown controller — my first EV!

    If I replace this controller with two three-phase controllers, what wattage do I need? It's a six phase 3000W motor; do I need two 1500W three-phase controllers, or two 3000W three-phase controllers?
  11. slam

    Zapino scooter with blown controller — my first EV!

    Do you mean the MOSFETs? The MOSFETs are labeled IRFB4310. Spec sheet says 100V, 7 mOhms, 140 A. Mouser has them for about $3.34 each. Not sure if I need to replace only the damaged ones, all 12 on one of two controller sides, or all 24 on the board. The blown capacitor is tiny and totally...
  12. slam

    Zapino scooter with blown controller — my first EV!

    Thanks eTrike! If I can't get it rolling again I'd be happy to sell it to you for what I paid. =) My fear with replacing the MOSFETs is that I don't know what else was damage. I see one blown cap, but I could be wasting my time with this controller. Replacing the controller might be a safer...
  13. slam

    Zapino scooter with blown controller — my first EV!

    Hey folks! I have blown MOSFETs. Should I attempt to rebuilt the controller, replace it, or upgrade it? I picked up a 2008 Zapino scooter with known problems. This is my first EV and a bit of a learning curve coming from TDI VWs! My first time on this forum as well. The scooter reportedly was...
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