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Thread: Making a 54kw Cafe racer

              
   
   
  1. #1
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    Making a 54kw Cafe racer

    Hi

    I am from Indonesia. I'm very interested on building an electric motorcycle.
    I want to build electric motorcycle because i know it's fast and reliable and cool, but the majority of Indonesian people still don't realize that.
    I want to show them how good EV can be.

    I want to build my bike as powerfull as this guy's bike but using 18650 Lithium Ion Battery
    https://youtu.be/Inela1cI30k?t=518

    He's using :
    - Motor : Motoenergy ME1507
    Current : 200Amps
    Power : 17kw
    http://www.motenergy.com/mepmbrmo.html

    - Controller : Mobipus 72600
    72-90V 600Amps
    power : 42-54kw

    - Battery : 90v 30Ah
    battery detail: https://youtu.be/Inela1cI30k?t=518

    What I want to use:
    - Motor : Motoenergy ME1507
    Current : 200Amps
    Power : 17kw
    http://www.motenergy.com/mepmbrmo.html

    - Controller : Mobipus 72600 ($1,100)
    72-90V 600Amps
    power : 42-54kw
    OR : Mobipus 72200 ($420)
    72-90v 200Amps
    will the performance change significantly if i use the 200amp controller?

    -Battery : LG HG2 3000mAh 3.6v 20A or sony vtc6 3000mAh 3.6v 15A or 30A(upto 80degree celcius)
    I think i will use 25s15p making it 90v 45Ah Battery pack.
    but I'm confused with the Amps the controller is pulling, will this battery configuration is enough to supply the energy?

    what i don't understand :
    - how can a 17kw rated motor runs 54kw power as the guy mentioned at the video?

    I'm really hope you guys could answer my questions since i don't know anyone who can answer these questions

    Thanks before.

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  3. #2
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    The ME1507 is rated at 17kW continuous. Most of the Motoenergy stuff I've seen has a peak power of about 3x the continuous rating. Keeping this in mind, a peak power of 54kW sounds in the ballpark. I think their "peak" rating is valid for something like 1-2 minutes.

  4. #3
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    to get the peak power of 50kW, i should use the 72600 controller or i can use the 72200 controller?

  5. #4
    Senior Member Stevo's Avatar
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    Keep in mind that the batteries are going to be the component that you will be constantly upgrading in the future... so the initial motor and controller purchase should be your priority at the start. I like the water cooled version of your motor choice http://www.motenergy.com/mepmwaco.html or http://www.motenergy.com/mepmwacomo.html
    to increase reliability and prevent heat issues. I'd go with the higher output controller, then if a newer improved motor becomes available, hopefully you wont need to upgrade the controller too.
    Original build: http://vorworxemc.wix.com/vorworx
    Current rides: '96 Honda Ohlins VFR, '03 Cannondale C440R, '03 Cannondale Cannibal, '06 Yamaha 450 Wolverine 4x4

  6. #5
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    Quote Originally Posted by Stevo View Post
    Keep in mind that the batteries are going to be the component that you will be constantly upgrading in the future... so the initial motor and controller purchase should be your priority at the start. I like the water cooled version of your motor choice http://www.motenergy.com/mepmwaco.html or http://www.motenergy.com/mepmwacomo.html
    to increase reliability and prevent heat issues. I'd go with the higher output controller, then if a newer improved motor becomes available, hopefully you wont need to upgrade the controller too.
    Thank you for the suggestion.
    Yes I am considering to buy the ME1616.
    For the water cooling system, can i use Computer Water Cooling System?

  7. #6
    Senior Member Stevo's Avatar
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    It suggests 6L / minute, which I couldn't find, but I found a 12L/minute here http://www.ebay.com/itm/DC12V-Stainless-Steel-Submersible-Diesel-Fuel-Water-Oil-Pump-12L-Per-Minute-38mm-/262718267948?epid=2132727309&hash=item3d2b3aa22c:g6wAAOSwo4pYKSyQ
    Maybe a resistor wired in series will slow the motor down to achieve 6L. But maybe 12L will work fine? I have a small Al catch can that I was thinking of putting the pump in as a reservoir, then add a small radiator from a 80cc dirtbike to cool the water.
    Last edited by Stevo; 1 Week Ago at 1530.
    Original build: http://vorworxemc.wix.com/vorworx
    Current rides: '96 Honda Ohlins VFR, '03 Cannondale C440R, '03 Cannondale Cannibal, '06 Yamaha 450 Wolverine 4x4

  8. #7
    Senior Member Spaceweasel's Avatar
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    Quote Originally Posted by jisyokputih View Post
    to get the peak power of 50kW, i should use the 72600 controller or i can use the 72200 controller?
    Power is volts x amps. 90v x 600a = 54kw. This is a peak rating, not continuous. Those controllers look pretty spiffy, but I don't see a continuous rating on their site. You will want to draw as many amps as possible to meet your goals, and a 200a peak will limit you to 18kw peak.

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