Solar Power Cube v17.10

The solar power cube is driven by a solar panel to pump hydraulic fluid with the initial purpose of powering an autonomous tractor for agricultural use.

Specifications

Solar Panel

 
 STC Power Rating 290W
 PTC Power Rating 263.07W 1
 STC Power per unit of area 13.8W/ft2 (148.2W/m2)
 Peak Efficiency 14.82%
 Power Tolerances -3%/+3%
 Number of Cells 72
 Nominal Voltage not applicable
 Imp 8.02A
 Vmp 36.4V 
 Dimensions: 77.6in (1,972mm) x 39.1in (992mm) x 1.6in (40mm)
 Weight: 50.7lb (23kg) 
 Hanwha Solar Panel

DC Motor and Controller

 
 450W 36 V DC electric motor MY1020z gear reduction
 Nominal Rated Input Voltage:  36 V
 Base RPM:		450
 Wires:		12 Gauge
 Efficiency:		78%
 Full Load Amps:	16
 Current Type:		DC
 Gear Ratio:		6.67:1
 Shaft Diameter: 	20 mm (13/16")
 Reversible
 EBAY MY1020z $67.05

 
 Controller:		PWM Motor Speed Controls DC 36V DC Gear Motor Speed Controller
 Input voltage:	DC9-60V
 Output voltage:	Linear load
 Output current:	0-20A
 Continuous power:	12600W
 Speed mode:		potentiometer (linear)
 Speed range:		0-100%
 Control frequency:	25KHZ
 Forward reversal:	support
 Suitable for motor:	DC brush
 Pot mounting hole:	7mm
 Product size:		approx. 92*50*36mm/3.62*1.96*1.41
 Net weight:		approx. 145g
 Center distance:	approx. 104mm
 EBAY $10.99

Hydraulic Power Unit

 
 Power 5 HP 3600 RPM
 Flow 2 GPM max.
 Pressure 2500 PSI max.
 Reservoir 1.1 gallons
 Shaft 1/2" dia. x 7/8" w/keyway
 Rotation CW
 Ports 3/8" NPT pressure
 Return 3/8" & 3/4" NPT
 Orientation Vertical
 Size 10" x 10" x 10"
 Shpg. 13 lbs.
 Surplus Center Hydraulic Power Unit $109.95

Hydraulic Motor

 
 31.88 cubic inch / revolution
 SAE 10 ports
 SAE 4 case drain

Calculations

Power

 Max Input: 290 W / (746 W/HP) = 0.389 HP

RPM input/output

 Max motor RPM: 2500
 Max Hydraulic Pump RPM: 3600
 Max Hydraulic Motor RPM: 240
 
 Estimated Max Wheel RPM: 1
 
 

Power Cube Working Document

 ["https://docs.google.com/spreadsheets/d/1KNVP2O3KogC6jyxMuRALWTxrYjyCJ4ChjeZsJVdqHsg/edit#gid=1"]