Controller:
1500 Watt motor is used as a propel motor in our project, so we choosed 1500 watt
capacity of NAMP CONTROLLER-(24 TUBE 1500W CONTROLLER) controller for
controlling the motor.
Which more specification are:
Power: 1500 watt
Voltage: 48V/60V
Dimension: 22cm*12cm*6.5cm
Features: Anti-theft, Three speed, Reverse, Anti sliding slope, Soft start, Voice, Cruise,
High & Low brake
Foot disc brake with handbrake:
Due to more realibiality and low carriage capacity, Disc brake with 3.5mm thickness and
90mm diameter is selected. Which is operated hydraulically. The distance between two
disc is 90cm with power off switch and hand brake facility.
Differential box:
Motor:
16 helical teeth close mesh of Hongrunda brand motor with rear heat dissipation fan and
pure copper coil is choosed according to power calculation. It have features with
superconducting high temperature resistance wire group with insulation and heat
insulation sheath, hall sensor and high speed bearing .
Following are the more specification of motor
Brand:HRD
Warrenty: 1 year
Product name: BLDC motor
Rated voltage: 48V/60V
Motor speed: 3000 rpm
Motor power: 1500 W
wheel and tire:
375-12 front with 400-12 rear two wheel and tube tire is choosed with factory design
due to fullfill of e trash trek.Where more specification are given below
Front tyre: Max. load 325Kg at 300 Kpa (4.3 P.S.I) COLD
Rear tyre: Max.Load 355Kg at 300 Kpa (4.3 P.S.I) COLD
Front telescopic shock absorber:
Source:Alibaba.com
Leaf spring:
Total weight of the vehicle is 500 kg with including 280kg payload. Manufacturer of
leafspring clamed single leaf spring have capacity of 750kg load , which is above 500kg
so this type of leaf spring is selected.
Length eye to eye: 19”
Pack thickness: 1.25”
Leaf spring width: 2”
Arc length: 3”
Capacity:750 Kg
Weight: 4.2 Kg
Bushing diameter: 1.1”
Bushing materials: Nylon
Leaves: 5
Electrical components:
All electrical components with 48 volt operated is came with kits. Following components
are includes in this kit. One headlight, two front side light with relay, one horn, one
display, two rear lights , 3 meter wire harness and one antitheft alarm.
CG calculation of e-Trashtrek
Calculation of center of gravity of e-Trashtrek is done by using weighing machine to
know the weight distribution in each tire which can be noted.
b a
R F
Calculation of cg
Weight measured from weighing machine at a condition of ground.
Load at rear tire = 150 kg
R= 150*9.81 = 1471.5 N
Load at front tire = 63 kg
F = 63*9.81 = 618.63 N
Overall weight of e-Trashtrek = 213 kg
W = 213*9.81 = 2089.53 N
Wheel base(L) = 1.97 m
⅀Fy = 0( +) at F
Or, R*L – W*b = 0
Or, 1471.5*1.97 – 2089.53*b = 0
b = 1.387m
a=L–b
or, a = 1.97 – 1.387
a = 0.583 m
Weight measured from weighing machine at condition of inclined plane.
Height of inclined plane(h)= 370 mm =37cm
Wheel base(L)= 1970 mm
Sinɵ = h/L
h= ( N sr p
mg ) [ ( )]
−( L−b ) cot arcsin
H
L
+
R r + Rf
2
h= ( 152.2∗9.81∗1.97
213∗9.81 [
− (1.97−0.583 )) cot arcsin (
0.37
1.97 ) ] +
0.1524+0.1524
2
h=( 1.4077−1.387 ) cot [ 10.32 ] +0.1524
h = 0.0207*5.4917 + 0.1524
h = 0.1136 + 0.1524
h = 0.266 m = 266 mm
Charging time calculations:
YUKINOVA brand 54.6V and 6A level 1 Charger is selected for battery charging system.
More information from charger:
Model: APCP400W
Input: 180-280V AC, 50-60Hz, 2.5A Max.
Output: 54.6V DC ,6A
Battery: 13S Li-ion battery
From above information,
Charger output voltage(V) = 54.6 V
Output current (I) = 6 A
According to Nepal Electricity authority, power factor in Nepal is 0.8 for single phase.
Battery capacity (Cb) = 1440Wh
Battery capacity ( Cb )
Charging time ( T c ) =
Output Voltage ( V ) *Current ( I ) *power factor
1440 Wh
Charging time( Tc )=
54.6 V*6 A*0.8
Charging time ( T c ) = 5.49 hours
From the above calculations, it is concluded that the battery takes 5 to 6 hours to fully
charge by available charger.
