Solar Power Cube v17.10: Difference between revisions
Jump to navigation
Jump to search
Tom Griffing (talk | contribs) |
Tom Griffing (talk | contribs) |
||
| Line 105: | Line 105: | ||
Estimated Max Wheel RPM: 1 | Estimated Max Wheel RPM: 1 | ||
===Hydraulic Fluid Flow=== | |||
GPM required for 1 RPM @wheel: 31.88 cu in/min or 31.88 / 231 = 0.138 GPM | GPM required for 1 RPM @wheel: 31.88 cu in/min or 31.88 / 231 = 0.138 GPM | ||
RPM required from pump for 0.138 GPM: | 2 GPM @ 3600 RPM => Pump CIPR = (2 GPM * 231 cu in/Gal) / 3600 RPM = 0.128 CIPR (Cubic Inches Per Revolution) | ||
RPM required from pump for 0.138 GPM output: (0.138 GPM * 231 cu in/Gal) / 0.128 CIPR = 248 RPM | |||
===Max Torque input / output=== | ===Max Torque input / output=== | ||
Revision as of 23:22, 3 October 2017
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 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
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
Timing Belt and Pulleys
File:PC17.10-Timig-Pulleys.png Timing Belt
Hydraulic Motor (for reference)
31.88 cubic inch / revolution
SAE 10 ports
SAE 4 case drain
Calculations
Power
Max Motor Input: 290 W * 78% * 100 = 226.2 Watts Motor Output: 226 W / (746 W/HP) = 0.303 HP Motor Torque @ 450 RPM = 4.54 ft-lb Torque (ft-lb) = (HP * 33000) / (2 * pi * rotational speed) = (.303 * 33000) / (2 * 3.14159 * 450) = 3.54 ft-lbs Torque (NM) = Watts / (2 * pi * rotational speed) = 226 W / (2 * 3.14159 * 450 RPM) = 0.08 NM This will be used to determine pulley and belt specs
RPM input/output
Max motor RPM: 450 Max Hydraulic Pump RPM: 3600 Max Hydraulic Motor RPM: 240 Estimated Max Wheel RPM: 1
Hydraulic Fluid Flow
GPM required for 1 RPM @wheel: 31.88 cu in/min or 31.88 / 231 = 0.138 GPM 2 GPM @ 3600 RPM => Pump CIPR = (2 GPM * 231 cu in/Gal) / 3600 RPM = 0.128 CIPR (Cubic Inches Per Revolution) RPM required from pump for 0.138 GPM output: (0.138 GPM * 231 cu in/Gal) / 0.128 CIPR = 248 RPM
Max Torque input / output
Power Cube Working Document
["https://docs.google.com/spreadsheets/d/1KNVP2O3KogC6jyxMuRALWTxrYjyCJ4ChjeZsJVdqHsg/edit#gid=1"]