Power in Flux

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Type: Posts; User: Spoonman

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  1. Replies
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    I don't expect that would work, you might be able...

    I don't expect that would work, you might be able to balance the torque response to throttle with the main drive wheel for one gear ratio on the main engine, but as soon as you'd change gear the two...
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    I'm gonna take these in the order they were...

    I'm gonna take these in the order they were posted.



    Incorporating a means of monitoring the RPM on both wheels is easy enough; using that data as a control input for the assist-motor throttle...
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    Hubbahubba! :O

    Hubbahubba! :O
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    316

    Hmmm.. in theory I could see this working with...

    Hmmm.. in theory I could see this working with the Hub motor on the sidecar wheel alright; but ideally (and perhaps necessarily) the motor itself would have to be an induction or doubly fed machine...
  5. The Agni's are great motors, but I wouldn't even...

    The Agni's are great motors, but I wouldn't even consider using one in a hub config if you're after 100MPH and race spec performance.
    Suggest doing some reading up on 'unsprung mass' and its effect...
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    Looking good - have you incorporated compression...

    Looking good - have you incorporated compression plates into that pack? Those pouch cells need some help in that regard if you're to avoid premature failure on account of delamination.
    An...
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    dual water cooled motors (so rad required, and...

    dual water cooled motors (so rad required, and pump, lines, expansion bottle etc..) & controllers, with transfer box, and multiple meanwell chargers, in a GPZ500 chassis...
    ...it's a hell of a...
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    Most ebikes will only provide assistance up to...

    Most ebikes will only provide assistance up to 25km/hr - after that you're on your own steam; so 50km -> 2hr travel time if you actually want it to help you out, so at that point the question becomes...
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    There's a lad here in Ireland trying to Hawk...

    There's a lad here in Ireland trying to Hawk these under the company name 'Volt motorcycles'.
    I've yet to see a product but they've been advertising for years now and the main man shows up at a lot...
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    Looks like you're basically dialling in what...

    Looks like you're basically dialling in what would otherwise be 'slip'... interesting way of doing things, not one I've seen before.
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    All comes down to the sizing of power components,...

    All comes down to the sizing of power components, their monitoring and the way you put them to use.

    The only stressors, or points of fatigue on the system (beyond the remaining few mechanicals you...
  12. You referring to the stock units that come in the...

    You referring to the stock units that come in the leaf packs?

    Haven't actually considered using them as I haven't even looked into their characteristics - I was just thinking more along the lines...
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    oh for a woman who cleans the machines - mine...

    oh for a woman who cleans the machines - mine keeps the house shining like a new pin, but the car? ...it's a skip on wheels!!
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    As Frodus says, top balance is best even if for...

    As Frodus says, top balance is best even if for no other reason than you're at the top of the pack far more regularly than you're at the bottom which makes the whole lot far easier to monitor.
    Set...
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    72V x 600A = 42kW?!!? Damn that thing is gonna...

    72V x 600A = 42kW?!!?

    Damn that thing is gonna be handful! :O

    Can't wait to see the look on any 2T kart pilots face when they mash the throttle on that thing! :D
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    I've considered the Suzi v-twin chassis in the...

    I've considered the Suzi v-twin chassis in the past - they're very narrow between the spars though (even the TL's) which limits your options for battery configuration.
    That being said, the DL is...
  17. As have I been for a long while now - and I...

    As have I been for a long while now - and I absolutely agree, it's well worth studying.



    This is an excellent reference case, and I'd be curious to know if that data comes from cylindrical or...
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    The last two lines in that confused the hell out...

    The last two lines in that confused the hell out of me, but I got what you were saying in the end - yes. (I think ;) )



    Actually no, academically at least. In series they'd be absolutely fine...
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    I dunno - the GSX-V is a cracker, but it's...

    I dunno - the GSX-V is a cracker, but it's burdened by the fact that is was a learning project.

    Blank slate project will, with no doubt whatsoever, cost a hulluvalot more to get done, but what you...
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    No bother dude - I'm just still a little...

    No bother dude - I'm just still a little concerned that you're going to learn visually just how badly things can go wrong when you're dealing with high power batteries.
    You've got to remember that...
  21. I understand your concern and academically you're...

    I understand your concern and academically you're correct, however herein lies the reason for my assertion.

    The hot and cold temperature effects you're alluding to are *heavily* coupled with the...
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    Range aside, that configuration would be...

    Range aside, that configuration would be mah000sively popular throughout mainland europe as an alternative to standard scooters.
    In fact even with the limited range it may well still be plenty. I...
  23. Not much of a concern where leaf modules are...

    Not much of a concern where leaf modules are involved - if you're using 18650's then depending on the discharge 'C' rate, some consideration would be advisable alright.
    It's a point I've been...
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    Nope dude, you're still arranging cells...

    Nope dude, you're still arranging cells back-2-back here. Sum voltage will be zero.

    You need, in the parallels, to tie BOTH poles together - in effect creating ONE battery.
    THEN you wire that...
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    :O WOW! Dude I'm very glad you came on here,...

    :O WOW!

    Dude I'm very glad you came on here, and I hope you've done so before you attempted anything like what you've drawn.
    I reckon some serious 'book time' would be a very wise investment...
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