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  1. #1
    Senior Member DrkAngel's Avatar
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    Lightbulb Currie Revolution

    Currie - Currie Tech has officially ended the eZip eBikes line, scooters still produced.

    They have acquired or obtained marketing rights for Haibike.

    Top notch mid-drive line of eBikes.
    15 models available Spring of 2015



    The iZip line is still alive!
    Nearly every model upgraded and enhanced.
    12 models
    3 with mid-drive and the rest are hub motor, no more external motors.
    And
    only 1 model remaining that does not come with the Lithium battery as standard equipment.



    iZip 2015

    They are gearing up for the USA market!
    Most models are now 20mph/32kph capable and through some wizardry, possibly borrowed from HaiBike, they now have a pedal assist mode with 28mph/45kph capability!

    They are still marketing the eFlow line

    Which look great ... by the specs

    E-SYSTEM
    Specifications Description
    Motor Rear hub 500W, gearless, high speed
    Battery Lithium-ion 36V14.5Ah 522Wh
    Display eFlow LCD multi-function display with power adjustment features
    Speed 20 mph / 32 kph motor only, 28 mph / 45kph with hard pedaling
    Range 30-45 miles/48-72 km with Normal Pedaling
    FRAME
    Specifications Description
    Frame Aluminium 6061 hydroformed
    Fork RST alloy headshox w/30mm travel
    RearShock -
    Headset FSA internal
    DRIVETRAIN
    Specifications Description
    Shift lever SRAM SL700
    Front derailleur SRAM Apex
    Rear derailleur SRAM Apex
    Cassette or freewheel SRAM Apex 1050, 11-32T, 10-speed
    Chain FSA CN-910
    Pedals Wellgo platform
    WHEELSET
    Specifications Description
    Wheelset -
    Hubs ft/rear Alloy disc w/QR, motor rear
    Rim Alex FR-30 doublewall
    Spokes Stainless
    Tires Maxxis M2003 26x2
    COMPONENTS
    Specifications Description
    Brakes Tektro Auriga E-Sub hydraulic disc, 180/160mm rotors
    Brake Lever Tektro Auriga E-Comp w/motor cut-off switch
    Handlebar Kalloy no rise
    Stem Kalloy 3D forged
    Grips Velo kraton
    Saddle Velo racing
    Seatpost eFlow integrated w/battery
    Accessories Kickstand
    optional city kit with fenders, rack, lighting system
    WEIGHT
    Specifications Description
    50.5 lb w/o pedals

    But I just can't get past the phallic nature of the battery pack!
    Maybe if I was a girl?



    2015 eFlow
    "Best of all! ... I get to play. ... http://www.bikeforums.net/attachment...&thumb=1&stc=1
    Sorry! ... I'm addicted to improving enhancing.
    With side orders of inspiring enlightening!"

    Acronyms

  2. #2
    Senior Member DrkAngel's Avatar
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    Lightbulb 20mph motor only - 28mph w/pedal assist

    I had assumed that the new iZips performed some intricate wizardry to attain 20mph motor only and 28mph with "hard pedal assist" ...
    After further research ...turns out this is readily and simple to match.
    1st clue was the 350w motor.
    350w is is the necessary motor output to sustain 20mph.
    My previous models demonstrated that upping the voltage and limiting the current provides an extended shallow watt output curve, rather than the central bulge of power from a full current motor.

    After a bit of searching I matched a possible torque curve ...



    While technically true, the 28mph requires nearly 500w of pedal input.
    500w of pedal input is equivalent to 23mph pedal only effort.

    "Best of all! ... I get to play. ... http://www.bikeforums.net/attachment...&thumb=1&stc=1
    Sorry! ... I'm addicted to improving enhancing.
    With side orders of inspiring enlightening!"

    Acronyms

  3. #3
    Senior Member DrkAngel's Avatar
    Join Date
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    Quote Originally Posted by DrkAngel View Post
    I had assumed that the new iZips performed some intricate wizardry to attain 20mph motor only and 28mph with "hard pedal assist" ...
    After further research ...turns out this is readily and simple to match.
    1st clue was the 350w motor.
    350w is is the necessary motor output to sustain 20mph.
    My previous models demonstrated that upping the voltage and limiting the current provides an extended shallow watt output curve, rather than the central bulge of power from a full current motor.

    After a bit of searching I matched a possible torque curve ...



    While technically true, the 28mph requires nearly 500w of pedal input.
    500w of pedal input is equivalent to 23mph pedal only effort.

    It seems obvious that these HaiBikes use a current limited controller, most likely 10A.
    Find a compatible 20A controller and ... wow
    750w output and 27mph motor only and ...
    substantial assist past 30mph!

    Alternate possible motor profile:


    Durability of motor and 10 speed drivetrain are definitely to be considered tho ...
    "Best of all! ... I get to play. ... http://www.bikeforums.net/attachment...&thumb=1&stc=1
    Sorry! ... I'm addicted to improving enhancing.
    With side orders of inspiring enlightening!"

    Acronyms

  4. #4
    Senior Member DrkAngel's Avatar
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    Hot damn!
    Just realized something ...
    At 48V 10A controller this current regulated motor outputs 350w at the optimal point for 20mph USA "legal".
    At 48V 20A controller this current regulated motor outputs 750w USA "legal" max motor output.
    A simple PAS sensor and module could either limit controller amps or throttle signal strength.
    Either, could limit a 20A = 750w motor output to 10A 350w motor output.
    This could qualify as USA "legal" meeting the "20mph limit from motor only" and "750w maximum motor output".
    Just turn the pedals around (No longer "motor only" = Turbo Engaged!) and hit near 30mph ... 30mph+ with just a minimal effort applied.



    Your motor only speed is where Power intersects Load

    "Load Line" (Black) is for a mountain Bike ... Race bike, recumbent etc., would require PAS adjustment to meet "legal".
    Last edited by DrkAngel; 12-28-14 at 07:20 AM.
    "Best of all! ... I get to play. ... http://www.bikeforums.net/attachment...&thumb=1&stc=1
    Sorry! ... I'm addicted to improving enhancing.
    With side orders of inspiring enlightening!"

    Acronyms

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