1. Stop and Go Locomotion For scaled up design Jeff Knowlton
Rover Power
Stop and Go Locomotion For scaled up design
Jeff Knowlton
[Jeff Knowlton] [Power] 1

2. [Jeff Knowlton] [Power]
Test the possibility of a stop and go technique of locomotion to reduce solar panel size
Fix panel size and adjust motor size
Base batter size on motor size (much cheaper than larger panels)
[Jeff Knowlton] [Power] 2

3. [Jeff Knowlton] [Power]3

4. [Jeff Knowlton] [Power]
Assumptions
Battery can operate rover for one hour with 5% cushion
22% solar power efficiency
Drive /charge for full hour intervals
[Jeff Knowlton] [Power] 4

5. [Jeff Knowlton] [Power]
Initial Values
Driving motors – 820 watts (745 watts driving 75 watts steering)
25 watts for idling
Panel area of 1.44m2
[Jeff Knowlton] [Power] 5

6. [Jeff Knowlton] [Power]
Beyond the span of arrow the ratio of hours charged to hours driven
[Jeff Knowlton] [Power] 6

7. [Jeff Knowlton] [Power]
The two black likes are of equal slopes, indicating a 1 hour drive to 1 hour charge with a 2 to 1 dividing them
[Jeff Knowlton] [Power] 7

8. [Jeff Knowlton] [Power]
Panel Area
M^2
Motor
Watts
Battery Watt-hours
Drivable time
Battery mass kg
Number of battery cells
Model
1.44
820
940 98
~7.7 6
Model NCP43-1
615
715
121
~6.4 4
Model NCP55-1
410
490
195
~4.5 5
Model NCP25-1 1 65 87
131
[Jeff Knowlton] [Power] 8

9. [Name] [Group]