Milestone 3 (Part 1): Choice of Parts and Why
Motor:
Turnigy Aerodrive SK3 -
6364-245kv Brushless Outrunner Motor
Turns: 14T
Voltage: 10S
Lipoly
RPM/V: 245kv
Internal resistance: 0.018 Ohm
Max Loading: 70A
Max Power: 2700W
Shaft Dia: 8.0mm
Bolt holes:
32mm
Bolt thread: M4
Weight:
718g
Motor Plug: 4mm Bullet Connector
Reason behind Choice:
Calculations show that 245rpm/volts is a adequate rating that can drive the
go-kart to reach 30km/h under non-ideal conditions.
Controller:
•Frequency of
Operation: 16.6kHz.
•Standby Battery Current:
< 1mA.
•5V Sensor Supply
Current: 40mA.
•Supply Voltage:
PWR, 18V to 90V.
•Supply Current,
PWR, 150mA.
•Configurable
battery voltage range, B +. Max operating range: 18V to 45V.
•Analog Brake and
Throttle Input: 0-5 Volts. Can use 3-wire pot to produce 0-5V signal.
•Reverse Alarm,
Main Contactor Coil Driver, Meter: <200mA.
•Full Power
Operating Temperature Range: 0℃ to 50℃ (controller case temperature).
•Operating
Temperature Range: -30℃ to 90℃, 100℃ shutdown (controller case temperature).
•Motor Current
Limit, 10 seconds boost: 100A .
•Motor Current
Limit, continuous: 40A .
•Max Battery
Current :Configurable.
Reason behind
choice: Motor Current Limit matches max current limit.
Differential:
|
Specifications
|
Sprocket:
36 tooth 35 pitch
Overall
size 4-1/2" dia. x
21-1/2" long
Shpg. 10 lbs.
Reason behind choice: Price
Rear Wheel:
This is
a 24 x 1 black 6 spoke X-Core wheel. It is light weight with a 2.0" hub.
Includes plastic pushrims, with your choice of bearings and solid urethane
street tire.
Reason
behind Choice: 2 rear large wheels are part of our design. We have decided to
get the X-Core wheels as they provide a good balance between price and
function.
Front Wheel:
200x50
(8"x2") Front Wheel Assembly for Razor E150
Sprocket:
Steel Machinable-Bore
Sprocket for #35 Chain, 3/8" Pitch, 9 Teeth, 3/8" min Bore
Reason
behind Choice: Along with sprocket that is already attached to the
differential, this sprocket that is going to be attached to the motor satisfies
the gear ratio that will give a maximum speed of 30km/h.