1. ELEC 6491 Controlled Electric Drives
DESIGN OF AN ELECTRIC TOURIST SHUTTLE
Instructor : Dr. Maher Al-Badri
Miracle Ebenezer J J

2. Vehicle Parameters Motor Specifications Vehicle Specifications S. N
Description
Value 1
Base Speed
850 rpm 2
Motor Power Rating
20HP 3
Armature Rated Current
73 A 4
Armature Resistance
0.176Ω 5
Armature Voltage
230 V 6
Armature Inductance
4.6mH 7
Moment of Inertia (J)
0.462 Kg.m2 8
Frictional Co-efficient (B)
0.015 N.m.s / rad
S. N.
Description
Value 1.
Mass of the Vehicle
1587 Kg 2.
Radius of the Tire(r)
0.1524m 3
Maximum speed of the Vehicle
40 Km/Hr 4
Ground Clearance 7” 5
Maximum Gradient
20% 6
Mass of one wheel
9.5Kg
Motor Torque Nm
Gradient Torque Nm
Rolling Torque
35.55 Nm
Axle Torque
2.136 Nm
Frictional torque
1.33 N.m
Total load torque
692 Nm
Gear Ratio 4

3. Design Consideration Description Rating Battery Victron Energy,
26.4V ,180Ah
Motor Speed Controller
Evnetics, LLC
600A, 9 – 340V
Cable size and length
Four different types of wires are used to carry the power for different components
Gear Ratio
Gear ratio is equal to the ratio of number of teeth on the driver gear to the driven Gear ≈ 4

4. Wiring & Gear Gear Ratio
The number of teeth on the gear is selected such that, the gear ration is 4 . The Number of teeth in the Driver Gear is 12 and the Number of teeth in the Driven Gear is 48
Wiring Diagram

5. Sensors and Controller
DC-DC Converter
Sensor
Description
Value
Speed Sensor
Hall Effect Sensor - The Speed on the motor shaft needs to be fed to the Motor controller
Electro Sensor
HE950
Battery Temperature Sensor
The ideal charge voltage required by batteries changes with battery temperature
Xantrex BTS
Current Sensor 
Current sensor is used to detect electric current  in a wire, and generates a signal proportional to it
Honey Well
CSNL181 - XXX
±12V to 18V (±5%)
Speedometer
displays the instantaneous speed of a vehicle
VDO – 1323
km/h
Description
Value
Manufacturer
BRUSA - BDC546
Input Voltage V
Output Voltage V
Voltage range control circuit
9-16 V
Continuous current
300A
Efficiency
98.9 %
Ambient temperature range in operation
-40 to +85 °C

6. Motor Controller Armature current Motor torque Motor speed in RPM
Description
Value
Manufacturer
Soliton Jr
Voltage Range
9V-340V
Maximum Current
600A
Motor torque
Motor speed in RPM

7. Thank You !