-:PROJECT TITLE:ELECTRIC QUAD BIKE AND
WORKOUT
MACHINE
SUPERVISOR:AIR CDR.(R) ANWAR SAEED
GROUP MEMBERS:Arbaz Ahmad
100200
Muhammad Jawad
100372
Ahmad Jamal
100260
ABSTRACT
• Electric quad bike and work out machine is a
multifunctional machine which can be used as
an electric bike as well as a workout machine
which will charge the batteries to run the
main motor connected with the wheels.
• Batteries that are to be charged are of 24V.
FEATURES
•
•
•
•
•
•
1. One person seating capacity.
2. Max. speed up to 50 Km/h.
3. Digital Speedometer.
4. Battery Monitoring system.
5. Workout Machine.
6. Battery charging through Workout
machine.
BLOCK DIAGRAM
Speedo
meter
Battery
temp
Microcontroller
Control Unit
Battery
charger
(220V
AC)
Battery
charger
(Workout
machine)
accelarato
meter
Sensor
Motor
Battery
Control Unit
(regulator)
Light &
Horn
BMS
REGENERATION METHODS
Workout
Machine
Motor as
Generator
1
Input
Motor
2
Generator
Regulator
Battery
HARDWARE INVOLVED
•
•
•
•
•
•
•
•
Main frame (basic structure).
Motors
Microcontrollers
LCDs.
SSDs.
Gear system.
Batteries.
Other necessary components for electronics circuitry.
PROJECT
WORK
DISTRIBUTION
• Primary Objectives
– Derive the bike with
Electrical Energy.
– Bike Speed control.
– Charging the
batteries(220 V AC)
• Secondary Objective
– Regeneration
– Workout machine
-: PRIMARY OBJECTIVE :CALCULATIONS :
• 𝑯𝒑 = 𝒘𝒆𝒊𝒈𝒉𝒕 ×
𝒗𝒆𝒍𝒐𝒄𝒊𝒕𝒚
𝟐𝟑𝟒
𝟑
– Velocity=50km/h = 31.069
miles/h
– Weight(appx.) = 200Kg =
440 lb
Therefore :
Horse power =Hp=1.2 hp
1.2Hp = 895 Watts
CONT.
As
P=V*I so V=24V & P=895 Watts
Therefore
𝟖𝟗𝟓
I=
𝟐𝟒
= 37.29 Amps
I=37 Amperes
37 Amperes Current is a big deal indeed.
CONT.
As
P=V*I so V=24V & P=895 Watts
Therefore
𝟖𝟗𝟓
I=
𝟐𝟒
= 37.29 Amps
I=37 Amperes
RPM OF MOTOR
• Velocity of bike = v =25 Km/h
• V= (25000/60) m/min.
= 411 m/min.
• Radius of tire = R = 6.6 inches
= 0.17 meters
Circumference of tire = C = 2× л ×R
= 2 ×3.14×0.17
=1.0676 meters
• RPM = v/C = 411/1.0676
RPM ≈ 390 Rev./min.
GEAR RATIO
• No. of teeth in big gear=N=37
• No. of teeth in small gear=n=14
• Gear ratio = G = 37/14
G = 2.64
So due to gears rpm required by motor will
increase by a factor G
RPM = 390×2.64
Required RPM = 1030 Rev./min.
TORQUE OF MOTOR
P=τω
τ = P/ω
P = 1.2 HP = 895 Watts
ω= revolutions per second = 1030/60
RPS = 17 rev. / second
τ = 895/17
τ = 53 Nm
Load will be reduced due to Gears by a factor of G so
Required Torque is :
τ = 53/2.64 = 20 Nm
τ = 20Nm
• Primary Objectives
• Motor Selection and Installation
Series Wound
PMDC
3 phase AC motor
Hub motor
BEST OPTION ...???
• PMDC:
– Best option due to good
control & high power.
• Series Wound:
– Best for high power but
has poor speed control.
• 3 phase Induction:
– Complex Control Circuitry
& Quite Expensive.
• Hub:
– Synchronization is
complex in our case
PERMANENT MAGNET DC MOTOR
DEALING WITH HIGH
CURRENT
• To deal with the high current we’ve
searched a lot and finally concluded that
MOSFETs are the best solution in control
circuitry of motor because they have very
high Voltage and current ratings.
• After further research we found that
MOSFETs with such high rating were not
easily available in Pakistan so we used
Multiplexing technique.
MOTOR CONTROL
METHOD
• Speed of the motor will be controlled using
PWM method.
• Variable PWM will be applied to the gates of
MOSFETs and hence Speed will be varied
according to the requirement by the user.
MULTIPLEXING
TECHINIQUE
In multiplexing N no. of Electronic
switches are used to draw the current
form source instead of single switch. In
this way Larger current is divided in
smaller values and hence Switches with
low ratings can be used in the circuit.
SIMULATIONS
• Non Multiplexed Circuit
CONT..
• Multiplexed circuit
Visible in
next Slide
MULTIPLEXED
OUTPUT
BATTERY CHARGING
A Step down
Transformer converts
220V AC into 15V AC
then Rectifier, Rectifies
the 15V AC into 15V DC
which is directly
applied to the battery.
TIMELINE
PHASES
DESCRIPTION
PHASE 1
Literature Study.
PHASE 2
Proteus Simulation
COMPLETION TIME
15/June/2013
1st /August/2013
PHASE 3
Software Implementation.
15/Dec./2014
PHASE 4
Hardware Implementation.
15/January/2014
PHASE 5
Error Checking and prototype design.
15/June/2014.