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Anonymous Poster #1

Will This Work for a Solar Car?

12/13/2015 1:28 PM

sir, can u tell me that if i m using a li ion battery of 48v,40ah with the combination of 12v,50watt panel (4 in no.) using a mppt then this vehicle(a three wheel tadpole car) whose rear wheel is driving wheel with a hub motor of 48v(Design Integrated Structural with built-in Controller

GearingBrushless and Gearless Reduction Voltage Multi-Voltage (24V-48V)

Output

Multi-Variable Output (250W-1000W) Torque Maximum 70N-m

Cooling

Built-In Cooling Fan Weight 7.5 Kilograms

Current Capability

30 Amp Heavy Current Controller Intelligent Programmable Controller

Braking

Regenerative Braking with built in brake disc Safety Overheat and Overload protection

Interface

Plug & play harness) is the vehicle run with a speed of 10m/s for 4hr?
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lyn
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#1

Re: is it work for a solar car

12/13/2015 1:36 PM

There's no way to know with the information provided.

Build it and let us know.
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tcmtech
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Join Date: Jun 2009
Location: South of Minot North Dakota
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#2

Re: is it work for a solar car

12/13/2015 1:55 PM

Yes most likely no possibly longer if not.
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Crabtree
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#3

Re: is it work for a solar car

12/13/2015 2:40 PM

No, but you can tell me instead. Go for it, Mildred.

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redfred
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#4

Re: is it work for a solar car

12/13/2015 2:42 PM

You will not do it driving upwind while climbing that mountain in the snow.

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JE in Chicago
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#5

Re: is it work for a solar car

12/13/2015 3:16 PM

With an electric trike of very low weight on a downward grade that would be a challenge.. Thats almost 90 miles at over 20mph. You can double the batteries capacity for around $750. The solar will only add a fraction of what your motor craves.. How many watts does it require? 1000 or better I would guess.

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SolarEagle
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Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
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#6

Re: is it work for a solar car

12/13/2015 3:55 PM

It might be possible in full sun on a flat surface with a small person, but the speed may be a little optimistic for that long....

Wheelbase :58"
Track : 36"
Weight : 108 lbs APROX.
Frame 2x2 square steel
200 watt Hub motor
85 watt solar panel
Basic charge controller

Under average use is
maintenance free.
On solar alone this will go 8 mph, with fair performance . With battery operation performance is good with excellent range. Up to 25+ mi.range !
depending on rider
input and sunlight.

These are pedal assisted trikes...

http://www.solartrike.com/canopysolartrike.html

http://www.solartrike.com/

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Stuart21
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Australia - Member - New Member

Join Date: Jun 2011
Location: Thailand
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#8
In reply to #6

Re: is it work for a solar car

12/14/2015 12:50 AM

"Up to 25+ mi.range ! "

Wot, before sunset?

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SolarEagle
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Location: by the beach in Florida
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#9
In reply to #8

Re: is it work for a solar car

12/14/2015 6:13 PM

How about 66 mph for 310 miles?

Technical specifications for eVe
DimensionsLength: 4.5 metres (15 ft)
Width: 1.8 metres (5 ft 11 in)
Height: 1.1 metres (3 ft 7 in)
Weight430 kilograms (950 lb)
Solar Cells/Array4-square-metre (43 sq ft) array. All cells are monocrystalline silicon with an approximate efficiency of >23%
Seats2 made of carbon fiber, each with a 3-point safety harness
ChassisCarbon fiber monocoque with foam and an aramid honeycomb core
MotorsTwin, rear wheel, in hub, synchronous DC motors, both of which are brushless and have permanent magnets
Maximum speedAchieved: 132 kilometres per hour (82 mph)
Theoretical: 140 kilometres per hour (87 mph)
Battery Power16 kilowatt-hours (58 MJ)
TelemetryCustom Controlled Area Network (CAN) including GPS, barometric pressure, motor speeds, motor temperatures, tilt, and various voltages and currents

https://en.wikipedia.org/wiki/UNSW_Sunswift

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Tornado
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Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21017
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#7

Re: is it work for a solar car

12/13/2015 7:25 PM

It may depend largely on how aerodynamic the whole assembly is. I think your numbers are at least within reason, but only a trial can really tell.

At 40 AH for 4 hours, average current would be 10 A, which equates to 480 W ~~ 0.64 HP. Good bicyclist performance is roughly similar to the given speed and HP conditions, so you may be "in the ball park", even if you don't attain full speed and range.

Give it a try, and good luck.

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Mr. small
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Join Date: Nov 2015
Posts: 335
#10

Re: Will This Work for a Solar Car?

12/15/2015 8:29 AM

Use Kinetics analogy:

ΔU+ΔKE=0, First Law (Law of conservation of Energy)

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Users who posted comments:

Crabtree (1); JE in Chicago (1); lyn (1); Mr. small (1); redfred (1); SolarEagle (2); Stuart21 (1); tcmtech (1); Tornado (1)

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