Power in Flux

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Type: Posts; User: frodus

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    So, Things have been kind of hectic. I wasn't...

    So, Things have been kind of hectic.

    I wasn't expecting to change careers into the EV world, but I should be starting work with Cascadia Motion, owned by BorgWarner, in the coming weeks. So I'm...
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    Those are great! They monitor and balance. I...

    Those are great! They monitor and balance. I think they have temp sense inputs too.

    Which linear chip is it? They have pretty nice software you can use to get them working pretty easily.
  3. Thread: Sun 300-1774

    by frodus
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    They may not regulate the output unless hooked to...

    They may not regulate the output unless hooked to a load. Can you test them with a load?
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    I'll say this from experience, that you're...

    I'll say this from experience, that you're unlikely to create a DCF from scratch without a Dyno and some involvement from Sevcon. I have some, you'll need to test it though.

    If its a race bike,...
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    You'll need that file for the Sevcon in order to...

    You'll need that file for the Sevcon in order to get it working if the controller is brand new. If it's already programmed, you should be OK. Any more details you can share?

    You're right, my...
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    It looks mostly good. Unfortunately I don't...

    It looks mostly good.

    Unfortunately I don't know the file for the Zero motor enough to know if they've programmed the FS1, Seatswitch, etc. And I'm not sure if they've disabled the forward...
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    Let me clarify. It's a race bike. Things get...

    Let me clarify. It's a race bike. Things get rebuilt, and balanced once back in the shop. Discharge ought to be fine if he sets the LVC on the controller to an acceptable level.

    I still prefer a...
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    I think you're right for discharging. I'm just...

    I think you're right for discharging. I'm just hesitant for the charging side is all. If there's alarms, and someone is manning the charger until one of those alarms goes off, he should be OK. But I...
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    Go back to work Ted :)

    Go back to work Ted :)
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    As long as you can hear those. I wouln't ever...

    As long as you can hear those. I wouln't ever leave the vehicle unattended during charging.

    I'd suggest monitoring with something that has an output that can be used to drive a relay to shut...
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    Sweet project. Do you know what brand cells they...

    Sweet project. Do you know what brand cells they are?

    I know the Saft cells I have are rated for like 300A or so for 30s, and they're 40Ah cells, so like 7-8C without any issues. They're lifepo4...
  12. Do you have a link for the Flatpack 1800W? I'd...

    Do you have a link for the Flatpack 1800W?

    I'd suggest that you consider using the terminology "Leaf Modules" or "Leaf Batteries". Each of those modules has 4 cells in there as a 2s2p setup. 14s...
  13. I don't know, you're the one who brought up...

    I don't know, you're the one who brought up building something with Elcon flatpacs :) You'll have to see how they communicate. I've only worked with flatpacks you set via potentiometer. I know...
  14. Set the charger output voltages that of the final...

    Set the charger output voltages that of the final voltage you want. The power supply voltage will be that of the battery, so it'll start out low, and since there's a voltage difference between what...
  15. Most, if not all, chargers we work with these...

    Most, if not all, chargers we work with these days are CC/CV with a setpoint. for a 6-7kWh pack, a 1000W charger would take about 6-7 hours. You can double them up and do it in half. Just depends on...
  16. For lithium, you want CC then CV. They go...

    For lithium, you want CC then CV. They go constant current as the voltage of the pack raises to a certain point, then CV and the current tapers off and eventually stops.

    There's Elcon/TCChargers,...
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    Ugly.

    Ugly.
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    Here's the PDF it referenced, which outlines much...

    Here's the PDF it referenced, which outlines much of what is said in the article, with pics:
    http://www.aeroelectric.com/Reference_Docs/Switches/CH_Switch_Training_Manual.pdf
  19. I found some nice 125VDC rated switches that I'd...

    I found some nice 125VDC rated switches that I'd like to offer to purchase for you, if that works. Just need a shipping address, and number of switches. Sounds like you need one for F/R, and one for...
  20. REPOSTING what I wrote on diyelectriccar.com ...

    REPOSTING what I wrote on diyelectriccar.com

    NOTE TO ALL: He has the same topic thread going on over on diyelectriccar.com and it's all eerily similar.
    Click here to view the thread

    ...
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    I can ship internationally if you need help. I...

    I can ship internationally if you need help. I may have some on hand.

    Remind me the motor and controller you're using? And battery voltage and max battery current you wish to use?
  22. If you don't want our advice, why ask for it? ...

    If you don't want our advice, why ask for it?
    This is my last comment on the topic.

    I'm a degreed Senior Electrical Engineer and design systems all day long using rated components for the...
  23. Partially correct. I've done anything from 24V...

    Partially correct. I've done anything from 24V e-bike controllers, to Kelly controllers, to Curtis and Sevcon controllers all the way up to Rinehart PM100DXR's. It's just been a long time since I've...
  24. I don't know that I'd recommend using that...

    I don't know that I'd recommend using that controller if they're truly 60V.

    They're usually 12V for the forward, reverse, brake, etc. Only KSI (key on) is rated for full pack voltage.
  25. ANN and CNN are just different brand's version of...

    ANN and CNN are just different brand's version of a similar fuse style that meet your voltage requirement.
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