Power in Flux
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Thread: A series of questions to get me going.

              
   
   
  1. #21
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    Below is the other side of the the motor mount plate with hub and in exactly a straight line with the rear sprocket
    016 hub and bolt to fill shaft, arrived and fitted.jpg

    This is my 72 volt contactor mounted on an alumium bracket and using factory holes on the frame.
    022 72v connactor on mount.jpg

    wooden mock up of my controller, aluminium ordered but hasn't arrived just yet!
    024 controller mounting plate (version1 fiber board) .jpg

    a reinforcing piece I am thinking about but I amn't 100% about putting aluminium so close to terminal
    025 controller securing plate (version1).jpg
    Last edited by andy; 20 December 2015 at 1518.

  2. #22
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    Good to see it's heading in the right direction Andy,

    As to the batteries, what you need to do with them really depends on the chemistry you wind up with, but once you make yourself aware of the correct charge/discharge profiles, and keep any series modules balanced, then there's nothing to worry about at all.

  3. #23
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    thanks spoon man,
    I will be ringing you in the new year, I'd like to have someone watch when i do some wiring stuff!

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  5. #24
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    Quote Originally Posted by andy View Post
    a reinforcing piece I am thinking about but I amn't 100% about putting aluminium so close to terminal
    025 controller securing plate (version1).jpg
    It doesn't look like it's too close. You can get it powdercoated before you install it for extra safety, or use a rubberized/bedliner type coating. Should be just fine.

    Looks like it'll be a neat install.


    Sent from the Future via Google Skynet

  6. #25
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    Yes, I have been thinking about some spray on electrical insulator.
    Bed liner or schultz as i here it called over here might do.
    Neat but looks like my batteries are going to end up in the tank, which is a little high but not the end of the world.

  7. #26
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    Are you going to have enough space in the tank for a decent size pack?

  8. #27
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    I don't know,
    I'm going to go up into the tank hopefully that will give me what I need.
    One way or another ill sort it out.

  9. #28
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    hey guys it's been a while but I finally have a few quid to spend on the bike.
    i have my controller and motor lined up.
    It's always been my plan to buy the batteries last.
    So I'd love for some one to weigh in.
    can you buy a charger before batteries ?

    can someone recommend a good 72v on board charger (would there be an issue with a 72v charger if I had a 30 or 60v battery pack)?
    or dc-dc converter ?

    Is this what I should be focusing on or should I leave chargers and converters and work on instrumentation ?

  10. #29
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    No harm in getting the charger and housekeeping voltage rails established - you'll need the latter for some of your instruments anyway.

    Frodus has some chargers for sale at the moment that would suit a 72V application I think, check the FS section.

  11. #30
    Empulse R #24 frodus's Avatar
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    Absolutely, the DeltaQ chargers are pretty awesome, which is why I sell them and program them! They'll taylor to your need. The chargers I have for sale are Programmed with Lithium Profiles below:
    #67: (72V 73.8V)
    #128: (72V 82.044V)
    #211: (72V 83.16V)
    #163: (72V 85.5V)
    #53: (72V 87.588V)
    #123: (72V 89.1V)
    #164: (72V 91.188V)
    #135: (72V 93.384V)
    #177: (72V 98.532V)


    So it'll flex to your needs of batteries. Low range 73.8V fully charged up to 98.5V fully charged, which should cover a wide range of battery setups.

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