eMoto #3
OwnerLennon Rodgers
LocationPasadena, California United States map
Web/EmailWebPage email image
Vehicle2007 LIFAN TMS
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MotorMars ME0709 Permanent Magnet DC
300 amps peak and 125 amps continuous, 24-72 VDC, brushed PM:
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DrivetrainNo transmission (direct drive)
72 Tooth (ANSI #40) sprocket in the back
12 Tooth (ANSI #40) pinion on motor
ControllerKelly KD72301
300A for a PM with Regen:
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Batteries6 B and B EVP 44-12, 12.00 Volt, Lead-Acid, AGM
System Voltage72 Volts
ChargerSoneil 1206S
12 Volt 3 Amp Constant (qty = 6)
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DC/DC ConverterKelly HWZ Series
DC/DC Converter (60V-84V to 12V 300W)
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InstrumentationDrain Brain
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Top Speed45 MPH (72 KPH)
Watt Hours/Mile75 Wh/Mile
EV Miles
Current:500 Miles (804 Kilometers)
 
    As of 11/2/2009
Seating Capacity1 adult
Curb Weight480 Pounds (218 Kilograms)
Conversion Time75% of my weekends for 3 months
Conversion CostTotal (motorcycle chassis and all): $2800

Motorcycle Chassis $650
Motor $481
Controller $350
Throttle $50
300 Amp Fuse & Holder $15
Battery Cables $28
Battery Cable lugs $13
High Current Switch $17
Metal Brackets & Supports $50
Metal for Mounts $30
Misc $100
72 Tooth Sprocket $78
Chain $25
12 Tooth Pinion $14
Nuts/Bolts $40
Shrink Cable Wrap, Wires, etc. $50
Batteries $280
Charger $260
72V to 12V DC/DC Converter $100
Instrument (Brain Drain / Cycle Analyst) $181

Total $2,812
Additional FeaturesMore info here: www.electricmotion.org

Pseudo parts list:
Motor (Mars Electric: ME0709, 300 amps peak and 125 amps continuous, 24-72 VDC, brushed PM):
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Controller (Kelly Controller: KD72301, 300A for a PM with Regen):
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Adapter for controller (to PC):
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RS232 Cable (to PC):
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Fuse (ANE 200A-500A)
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Fuse Holder (ANDU)
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Display / Real-time Analysis:
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Throttle: Magura 0-5K Twist Grip:
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Charger (Soneil 12 Volt 3 Amp Constant (qty = 6)):
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Copper lugs for battery cables:
Ebay

Battery cables (welding #4 wire):
Ebay

Electrical Plug for Tank (for charging with extension cord):
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72-tooth sprocket for rear:
Azusa Engineering, tony@azusaeng.com

12-tooth pinion for motor:
McMaster Carr, Part #: 2500T444
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ANSI #40 chain:
McMaster Carr, Part #: 6261K448
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High Current Manual Switch:
Local automotive store

DC/DC Converter (60V-84V to 12V 300W)
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Note: very large - might consider a different one.

Other options (considered but did not purchase):

Throttle: Hall 0-5V Twist Grip
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Charger (24V-72V/15A-40A)
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Main Contactor (24-84 VDC Coils 400Amps)
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Whatever you estimate for time, cost and mass: add at least 20%

I have variable regen with the left grip/twist. Regen is activated with the old engine start button (right thumb), though it could also be added to the rear brake switch.

My initial calculations (Excel) match the actual performance quite well (predicting max current, range, max speed, etc.). Here are my calculations:
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Here's a video of it in action:
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Some construction pictures:
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code by jerry