This document discusses wireless power transmission applied to electric vehicles. It begins with an introduction to electric vehicles and the need to reduce charging times. It then describes different charging systems and compares wireless to plug-in charging. The document outlines the typical components of a wireless charging system including power inverters, resonant tanks, and induction coils. It presents an experimental model of a small-scale wireless charging track for electric cars. Key advantages include reduced operating costs, lower maintenance than gas vehicles, and the ability to charge multiple vehicles simultaneously. However, initial installation costs are high and power transmission is limited by range. In conclusion, wireless charging is well-suited for electric vehicles by reducing recharging times and allowing charging on the go.

1. WIRELESS POWER TRANSMISSION
APPLIED TO PURE ELECTRIC
VEHICLE
Presented by: Georget Eldhose
Guided by: Renu Mary George
Date of presentation: 17/09/2018
Department of Electrical & Electronics Engg ,MBITS 1/25

2. CONTENTS
• Introduction
• What are EVs
• Need for EVs
• Types of charging system
• Wireless charging VS Plug-in charging
• What is wireless charging
• Typical wireless conversion-chain
• Experimental Model
• How it works
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3. CONTENTS
• Construction of Roads
• Wireless Charging
• Advantages and Disadvantages
• Related figures
• Conclusion
• References
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4. INTRODUCTION
• Eco-friendly vehicle is the global trend in the automobile industry.
• Electrical vehicle (EV) is the most suitable alternative of petroleum
vehicles.
• Large capacity, weight, expensive price, short life time, and charging
time of battery obstruct the commercialization of EV.
• To solve these problems, wireless charging of electric vehicle is
introduced.
• Reducing the time spent on recharging or even allowing the EV to
be charged during its movement
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5. WHAT ARE EVS
• An electric vehicle (EV) uses one or more electric motors or
traction motors for propulsion.
• An electric vehicle may be powered by electricity from off-
vehicle sources, or may be self-contained with a battery
• EVs include road and rail vehicles, surface and underwater
vessels, electric aircraft and electric spacecraft.
• It have zero emissions or pollution free vehicle
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6. NEED FOR EVS.
• Reduce Global Warming/Climate Change due to release of
carbon dioxide by burning of fossil fuels.
• Rising Prizes due to depletion of the reserves of Oil and
Natural Gas.
• Acid Rain Due to Sulphur Dioxide released by burning of
fossil fuels.
• Air pollution from vehicles bad for the Human Health.
• Impact on Aquatic Life by Oil Spills.
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7. TYPES OF CHARGING SYSTEMS
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Conductive Charging
 It utilizes connector
between the Electric power
source and vehicle battery.
 This type of charging is
utilized in Residential
areas.
Inductive Charging
 Wireless charging
coupled with magnetic
resonance to transfer
power from a
transmitting pad to a
receiving pad.
Battery Switching
 Depleted EV battery
pack is switched with a
fully charged battery
pack in the switching
station.
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8. EV WIRELESS CHARGING VS PLUG-IN
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• Auto charging and simple
• Low rate of wear and tear
of charging pad
• Minimum risk of
electrocution
• Required high control of
parking accuracy
• Efficiency is 90%
• Manual Plug-in of charging
cable
• High rate of tear due to high
usage of moving cables
• Probable risk of electrocution
• High tolerance towards
accuracy of parking
• Efficiency is 95%
Wireless charging Plug-in charging
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9. WHAT IS WIRELESS CHARGING
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• Wireless charging uses an electromagnetic field to transfer energy
between two objects through electromagnetic induction.
• Energy is sent through an inductive coupling to an electrical
device, which can then use that energy to charge batteries or run
the device.
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10. TYPICAL WIRELESS CONVERSION-
CHAIN
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11. CONTINUED…
• Electric power transmission in wireless, considering both possible conditions for
a Vehicle: parked or in-motion.
• WPT in-motion usually has association of IPT elements, it can be in series,
parallel or mixed modes.
• WPT system is basically composed by a
1. Full-bridge inverter with Phase-Shift modulation
2. Resonant tank
3. IPT elements (emitter and receiver coils)
4. High speed rectifier
5. battery/super capacitor as shown in figure.
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12. CONTINUED…
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1. Full-bridge inverter with Phase-Shift modulation
• Providing fixed frequency and soft-commutations,
provides high efficiency for transfer energy
2. Resonant Tank
• Resonant tank is composed by a series capacitor with the
IPT element, this tank usually works in frequency
modulation
• LLCC series-parallel resonant converter have excellent
response.
• It is designed by a capacitor in series with the primary IPT
element, and another capacitor is paralleled with output
from IPT element.
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13. CONTINUED…
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3. IPT elements
• It have two coils primary(transmitter) and
secondary(receiver)
• These are inductive coils works likes transformer
• Working principle is mutual induction
4. High speed rectifier
• It converts AC to DC for battery charging
5. Battery/super capacitor
• Battery is used for storing charge
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14. EXPERIMENTAL MODEL
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EV small scale IPT transmitter.
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15. CONTINUED…
• Application was made for an electric car in small scale, as shown in
Figure
• It have an experimental track of 15 meters of length in closed loop
• Where the charging station with 1.45 meters of length
• It have eight IPT in series association
• Provide a practically constant magnetic field throughout its length.
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16. HOW IT WORKS
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• It have a underground power lines and it energized the primary coil
• Primary coil produce a magnetic field
• Ev have secondary coil in the bottom and it links with the magnetic field
• Then power is transferred to secondary coil from primary coil by mutual
induction and battery is charged
• It is helpful to reduces the weight of the vehicle because of it only requires a
small battery
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17. CONSTRUCTION OF A ROAD
• Electric power strips are fixed 20 cm deep under the road
surface and connected to the power grid.
• These strips are known as primary coil and it produce
magnetic field
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18. WIRELESS CHARGING
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• Figures shows the typical wireless charging techniques
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19. ADVANTAGES
• 80 % reduced operating cost than equivalent gas powered vehicles.
• Lower maintenance costs than gas powered vehicles .
• Pollution free.
• Zero recharging time and unlimited range
• Light weight vehicles.
• A number of EVs can be charged at a time.
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20. ADVANTAGES
• Electrically safe.
• Charging is convenient.
• simplicity of use (no handling, no plugging)
• safety for users (no electrical hazard, no sparkle risks)
• no wear, no mechanical fitting
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21. DISADVANTAGES:
• Initial installation cost is very high.
• Working area is limited.
• Currently the speed is limited to 40 miles per hour.
• power outage might cause the EVs to run out of charge.
• Heat generation is more than traditional charging.
• Complex design.
• Construction of wireless charging road is required
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22. EXISTING SYSTEMS
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23. CONCLUSION:
• Wireless charging is most suitable method for EV charging
• It have high range of travel
• Reducing the time spent on recharging or even allowing the EV to be charged
during its movement
• Low maintenance cost but high initial cost.
• Better then conventional wired system.
• Energy crisis can be decreased.
• Low power loss
• In the future world will be completely wireless
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24. REFERENCES
1. WIRELESS POWER TRANSMISSION APPLIED TO PURE
ELECTRICVEHICLE Marcus F. C. Jorgetto1, Guilherme de A. e Melo2,
Jean M. de S. Ribeiro2 and Carlos A. Canesin2 1Federal Institute of
Education, Science and Technology of Mato Grosso do Sul - IFMS, Três
Lagoas – MS, Brazil 2São Paulo State University-UNESP, LEP-Power
Electronics Laboratory, Ilha Solteira – SP, Brazil, IEEE 2017
2. Battery Charger for Electric Vehicles based on a Wireless Power
Transmission, Paolo Germano, Yves Perriard, Senior Member IEEE 2016
3. C. C. Mi, G. Buja, S. Y. Choi and C. T. Rim, "Modern Advances in
Wireless Power Transfer Systems for Roadway Powered Electric
Vehicles," IEEE Transactions on Industrial Electronics
4. https://en.wikipedia.org/wiki/Electric_vehicle
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THANK YOU…
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