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  1. monkeychops

    Old ebike, new controller and throttle

    About this: I forgot to connect the hall sensor plug just now and the motor still worked fine. I guess the hall sensor wires aren't needed with this controller?
  2. monkeychops

    Old ebike, new controller and throttle

    Ok another update (hopefully last one). I think the extra power was because something was snagging. It's now sending a normal amount of power through. Plus the wheel seemed to reverse direction again. So I connected the learning wire and tried a few more combinations of 3 phase wire until I...
  3. monkeychops

    Old ebike, new controller and throttle

    Tried a few more combinations of 3 phase connectors and found one that worked. The throttle seems to send through loads more power than the last one I had. I only seemed to twist is a little bit and it was up to 600W+. Previously with the bike on the stand, full throttle would never send more...
  4. monkeychops

    Old ebike, new controller and throttle

    Thanks! I feel a small step closer - with the learning wires connected the motor now goes the correct way around. But when I power off, disconnect the learning wires and power on again, the throttle makes the motor spin backwards!
  5. monkeychops

    Old ebike, new controller and throttle

    Nice one, I've made progress! However the motor keeps spinning backwards when I connect. I've powered up 5 times now and it's always running backwards. Any ideas?
  6. monkeychops

    Old ebike, new controller and throttle

    Hi. I have an old ebike, basic frame from 2000, modified for lipos and brushless about 15 years ago. The controller broke recently so I replaced it with a cheap one on ebay with many more wires than I needed. I also bought a new throttle at the same time, a basic 3 wire one. I have connected...
  7. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    I didn't run the motor at all with the polarity reversed. Straight after I'd connected everything up (wrongly) and I measured total voltage at 37ish volts, I realised something was wrong and disconnected the paralleled 3S packs. Worried about any damage to my lipos, but have since put them...
  8. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    Good point about the fuse holder. I will give it a bit of an inspection. Plus the bit where it screws into on the bike needs checking. I understand what you are saying. In my situation I am being limited by the 22A current limit on the controller. Maximum power on 49V was approx 1078W. Now it...
  9. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    Update: The 3S batteries arrived 3 weeks after ordering them. Turnigy 30S 4000mAh ones. They seem fine. First thing I noticed after connecting them all up with my various wiring harnesses was that the total pack voltage measured 36V. What the flip, I was expecting 60V! It turns out I had tried...
  10. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    Thanks again chaps. Will report back later.
  11. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    Jeremy noted earlier in the thread: "The voltage regulator is an LM317K, which has an absolute maximum differential input voltage of 40V, so the max at its input would be around 52V" So 45V should be ok.
  12. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    Not sure. The voltages are as indicated on the photo above, except for the one measuring 44V which now measures 38.3V. Tell me what I should measure and I'm there, multimeter in hand! <edit>Resistance of the new resistor rated at 330 ohms and measured by me just now with multimeter at 340...
  13. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    Hi guys. I've soldered in a new resistor as suggested and measured the voltages across all the capacitors again in the same way as before. Previously the voltages measured as per this photo: The only one significantly different with the new resistor is the one at the bottom of the pic...
  14. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    Thanks Jeremy. Ebay purchases made.
  15. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    Update: Possibly slightly over-reacted in my previous post. I have calmed down now. Got home and opened the controller up and reassembled with piece of thin tape insulating the metal 'posts' that the FETs sit on. You can just see the grey/white original tape in this photo: It's sticking...
  16. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    I've asked cellman for a new controller. Put the controller back together the other night. All seemed fine, the wheel turned when I tested it in the garage. Started cycling to work this morning. Grinding sound straight away then complete loss of power. When I reassembled the controller I...
  17. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    A bit out in the sticks in north Wiltshire. I can wait a few days for it to arrive via eBay, no problem.
  18. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    Thanks. Will get one of these and report back later. http://www.ebay.co.uk/itm/5x-330-ohm-330R-2W-2-Watt-Metal-Film-Resistor-/170681466367
  19. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    I found an ignition wire and measured the current though it. Unfortunately my multimeter isn't that precise. Looks like around 60mA though: Remind me where that leaves me? This was the missing information from the equation to get the right resistance for the larger resistor? Which we are...
  20. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    Oh hang on, are you talking about the current coming into the controller direct from the battery? Not the current in some internal bit of the controller circuit? So, with the controller fully connected up, disconnect the +ve battery supply connector and connect the tips of my multimeter in...
  21. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    I'm not confident measuring current. I have a multimeter that does it, but you have to break the circuit don't you? From one of the photos on page 2 of this thread, can you tell me where the 2 probes would have to connect? Or is it not that simple. Sorry to be such a noob. Feel free to draw a...
  22. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    Ok, thanks Jeremy. <edit>thanks Ykick too</edit> Just to be absolutely clear for an old duffer like me: 1. Replacing that resistor with a 3W, 560 Ohm one like this http://www.ebay.co.uk/itm/10-Pcs-3W-500V-560-Ohm-Axial-Lead-Metal-Oxide-Film-Resistors-/130782404623 will significantly reduce the...
  23. monkeychops

    Power analyser over 60V?

    Thanks. I charge to 4.1V which for a 15S pack makes 61.5V so a 63V limit is fine.
  24. monkeychops

    Possibility of putting 66V through an MXUS DD rear hub?

    Sorry, just to recap because I'm now thinking of an upgrade to 15S. I charge to 4.1V per cell so this will give me a maximum of 61.5V. But my pack sags about 1V under full load, so this will be a maximum of 60.5V going into the controller under power. Is that likely to be ok without any...
  25. monkeychops

    Power analyser over 60V?

    Thanks Greg To summarise those posts 1. the Tunigy Watt meter should work past 60V a little, maybe 10% or so 2. as should the 'Watts Up' meter 3. the Cycle Analyst is what a lot of people recommend, but costs more. 4. no specific info on the Hobby KIng power analyser. I guess for a few volts...
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