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Currie Revolution
Currie - Currie Tech has officially ended the eZip eBikes line, scooters still produced.
They have acquired or obtained marketing rights for Haibike. http://www.currietech.com/images/hai...rbike-2014.jpg Top notch mid-drive line of eBikes. 15 models available Spring of 2015 http://currietech.com/php_image.php?...-race-bike.jpg 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. http://currietech.com/php_image.php?...ct-Picture.jpg 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? http://currietech.com/php_image.php?...1386618318.jpg 2015 eFlow |
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 ... http://endless-sphere.com/forums/dow...6f146950470dc2 While technically true, the 28mph requires nearly 500w of pedal input. 500w of pedal input is equivalent to 23mph pedal only effort. http://endless-sphere.com/w/images/0..._%3D_Speed.jpg |
Originally Posted by DrkAngel
(Post 17417645)
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 ... http://endless-sphere.com/forums/dow...6f146950470dc2 While technically true, the 28mph requires nearly 500w of pedal input. 500w of pedal input is equivalent to 23mph pedal only effort. http://endless-sphere.com/w/images/0..._%3D_Speed.jpg Find a compatible 20A controller and ... wow 750w output and 27mph motor only and ... substantial assist past 30mph! Alternate possible motor profile: http://endless-sphere.com/forums/dow...6f146950470dc2 Durability of motor and 10 speed drivetrain are definitely to be considered tho ... |
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. http://endless-sphere.com/forums/dow...6f146950470dc2 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". |
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