Download - SDSMT Zero Emissions Snowmobile
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SDSMT Zero Emissions Snowmobile
Bennett Prosser, Kyle Roe
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OverviewGoalsSystem OverviewOperator PerspectiveDealer/Outfitter PerspectiveEnvironmental ImpactsTest Results
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Who We AreSDSMT Student Organization with focus on ZE sledUndergraduate ME and EE students
4 Juniors3 Sophomores
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GoalsDevelop electric snowmobile based on existing IC chassisApproach performance levels of current gasoline sleds
AccelerationHandling/Capability Range FUN
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System Overview2014 Polaris Switchback AssaultBrammo 15/90 Li-ion battery modules (6)
88.8V, 90Ah, 7.98kWhSevcon Gen4 motor controllerParker/Brammo GVM1425 liquid cooled PMAC motor
56hp peak, 67lb*ftSafety systems
Brammo BMS Bender IMD
SDSMT ZE Snowmobile – 2014 Switchback
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Operator PerspectiveFunctions like conventional snowmobileCrossover chassis - benefitsRange
Wh / [V * I / mph] = D D = 36 miles at 20mph
Peak torque and power atlow motor rpm
Ergonomics and comfort
Seat concept
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Dealer / Outfitter PerspectiveModular design allows for easy maintenance
Removable battery container Fault indication lights – BMS, IMD Fault reporting and logging from controller Diagnostic software for BMS, batteries, controller
Fault lights and data display
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Dealer / Outfitter Perspective Components reduce maintenance needs
Gates Polychain direct drive belt No cleaning, no clutch tuning
Only annual maintenance changing chain-case oil, checking coolant levels
Direct-drive belt and motor Aluminum Battery container
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Dealer / Outfitter Perspective Cost
Initial cost is high high end components and performance Quality, value
Minimal operation costs mitigate higher initial cost
Top view without plastics
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Environmental Perspective Zero source emissions Energy consumption significantly less than IC snowmobile Sealed motor compartment Light weight = softer treading Minimal noise impact
Only noise from belt and track drive
Light weight being demonstrated
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Results / Testing2012/2013 concept capable of 20 miles with 8kWh
battery 2014 concept loses 200+ lbs
With same 8kWh capacity 30+ mile range Healthier batteries
Strong acceleration Good handling Cold weather capability
Brammo 15/90 Li-ion modulePhoto: Brammo Inc.
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SummaryGoalsSystem OverviewOperator PerspectiveDealer/Outfitter PerspectiveEnvironmental ImpactsTest Results
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Questions?