Power in Flux

Search:

Type: Posts; User: PaulWay

Page 1 of 4 1 2 3 4

Search: Search took 0.01 seconds.

  1. Replies
    3
    Views
    2,220

    Fixed!

    I got in contact with them, and for some reason their emails, which had come through at first, were now being silently discarded somewhere in my email system. So I gave them an alternate email...
  2. Replies
    5
    Views
    2,660

    The big problem I have with using capacitors is...

    The big problem I have with using capacitors is their maximum voltage. Putting capacitors in series increases their voltage but decreases their capacity inversely. So 'supercapacitors' that only go...
  3. Replies
    3
    Views
    2,220

    OT1H yes - I'm not going to contact them until...

    OT1H yes - I'm not going to contact them until well into the new year (I'm away for a bit for other things).

    OTOH, I started this process in early November. I don't think that it should take that...
  4. Replies
    3
    Views
    2,220

    Trying to buy an Emrax 228

    Hi all,

    I've been trying to buy an Emrax 228 from Emrax. I went through their ordering process and got a quotation, then requested a pro-forma invoice, and they asked for my town and 'zip code'...
  5. Replies
    24
    Views
    9,524

    Hi all, I know I haven't been on here for...

    Hi all,

    I know I haven't been on here for ages; sorry!

    I've put the battery comparison pages on my main site, at:

    http://mabula.net/battcomp/

    That should always work, even if it has to...
  6. Replies
    5
    Views
    3,904

    IMO the other thing to do with Headway cells is...

    IMO the other thing to do with Headway cells is write on them their internal resistance (if you measure that) and then try to group cells of like resistance. Keep a few spare in each resistance...
  7. Opening up the MHM-602 to extract the stator is a...

    Opening up the MHM-602 to extract the stator is a bit of a process, but it's not difficult.


    Leave the axle through the motor and set the wheel on the bench with the screw thread of the axle...
  8. eFazer off the road again, working on fixing it.

    Hi all,

    Long time no post!

    So I finally got the eFazer going and rode it for about a year. It could easily do 87km on a charge, and looking at battery state when recharging showed the...
  9. Replies
    8
    Views
    2,931

    For DC, the switching frequency isn't really a...

    For DC, the switching frequency isn't really a problem - you're using PFM or PWM to chop the battery DC up according to how much power (i.e. amps) you want. This then gets converted[1] to DC but at...
  10. Replies
    8
    Views
    2,931

    One of the members of Canberra EV has one of...

    One of the members of Canberra EV has one of those. It was fairly basic, but did the job, and if you're prepared to do the soldering yourself it was quite a bit cheaper than a regular one.

    I'm a...
  11. Replies
    10
    Views
    3,076

    I looked at that Battery University page, and it...

    I looked at that Battery University page, and it set most of my "woo-woo science" alarms off within the first paragraph. Analogies to human beings, no definitions of what terms like "priming",...
  12. Replies
    10
    Views
    3,076

    I admit that I don't know much about the general...

    I admit that I don't know much about the general process, but to me this sounds a bit like electronic voodoo.

    It reminds me of the "memory effect" myth that went around about rechargeable Nickel...
  13. Replies
    34
    Views
    7,733

    Edit: looks like I'm posting late into a...

    Edit: looks like I'm posting late into a conversation. Here are my thoughts anyway.

    I think if you have $4000 to spend and want an electric commuter vehicle, your options are:

    * Buy a second...
  14. Thread: Howdy

    by PaulWay
    Replies
    17
    Views
    5,224

    Hi Rob! Welcome! A motorcycle as a commuter...

    Hi Rob! Welcome!

    A motorcycle as a commuter vehicle is a good thing generally - you're moving less weight around, for one. Converting one is much cheaper than trying to convert a car, and IMO...
  15. Thread: Podbuilder

    by PaulWay
    Replies
    240
    Views
    54,145

    Here, have a play with this: 72 volt pack, 50...

    Here, have a play with this:

    72 volt pack, 50 kilos maximum, sorted in order of price, with only cells that someone's actually selling. You can change all those settings and more :)

    So in...
  16. Replies
    16
    Views
    4,969

    EVcycle, it looks like you're asking "I've...

    EVcycle, it looks like you're asking "I've reduced how hard I push the pack, and it's not getting me any further". Yeah?

    One obvious conclusion from that would be that you haven't actually been...
  17. Thread: Battery Space

    by PaulWay
    Replies
    24
    Views
    8,211

    Alternative to building a pack all at once.

    One advantage of using smaller cells, like the Headways and other pouch cells, is that you can construct your pack gradually.

    For example, Tony here (SplinterOz) has a 50AH pack at 72V, with five...
  18. Replies
    19
    Views
    7,284

    Those torque graphs and observations are all...

    Those torque graphs and observations are all great - I think that's exactly the kind of thing that makes sense of the numbers we're talking about.

    One other consideration, I think, is that there's...
  19. Thread: Battery Space

    by PaulWay
    Replies
    24
    Views
    8,211

    The two fundamental equations here are watts =...

    The two fundamental equations here are watts = volts * amps and loss is proportional to resistance * amps squared (forgive me for not being technical enough there, I'm trying to keep it simple for...
  20. Thread: Battery Space

    by PaulWay
    Replies
    24
    Views
    8,211

    Lionstrike, Cardboard Aided Design is the way to...

    Lionstrike, Cardboard Aided Design is the way to go to at least sort out how you're going to fit the cells into your bike. It's how I did it with my ThunderSky cells and I fitted all of them in with...
  21. Unlike the rest of my team, whose hair fell out....

    Unlike the rest of my team, whose hair fell out.

    Have fun,

    Paul
  22. Thread: Yardney cells

    by PaulWay
    Replies
    3
    Views
    2,135

    I've added them to the database, for what it's...

    I've added them to the database, for what it's worth:

    http://mabula.tangram.dnsalias.net/battcomp/m/yardney

    Have fun,

    Paul
  23. Thread: Today, I ...

    by PaulWay
    Replies
    856
    Views
    213,297

    Today I ordered some Electroluminescent wire to...

    Today I ordered some Electroluminescent wire to embed in the clear plastic or fibreglass that we'll use for the battery covers. Going for maximum cool :D

    Have fun,

    Paul
  24. Thread: Today, I ...

    by PaulWay
    Replies
    856
    Views
    213,297

    On Friday we tried to do a foam mould for the...

    On Friday we tried to do a foam mould for the fairings. For some unknown reason, the "expands by fify times" foam was more like "expands to double, and then sits there mocking you" foam. So we ate...
  25. Rocking awesome! Great work there! It's only...

    Rocking awesome! Great work there!

    It's only going to get better...

    Have fun,

    Paul
Results 1 to 25 of 94
Page 1 of 4 1 2 3 4