The document presents a project focused on the design and development of wireless charging for electric vehicles utilizing electromagnetic induction, aiming to improve charging efficiency and reduce costs for both providers and consumers. The project details the methodology, hardware specifications, and operational principles of the wireless charging system, which operates effectively within a specified airgap. It concludes with aspirations to establish a market presence as a charging service provider for electric vehicles.

1. DESIGN AND DEVELOPMENT OF WIRELESS CHARGING
IN ELECTRIC VEHICLE
Guided by: Dr. P.K. Dhal
Professor/EEE Dept.
Submitted by:
NIKITASHANKER (8507)
SHRIKANT SINGH (8543)

2. CONTENT
• ABSTRACT
• INTRODUCTION
• OBJECTIVE
• METHODLOGY
• ALGORITHM
• FLOW CHART
• BLOCK DIAGRAM
• HARDWARE
• CONCLUSION
• REFERENCE

3. ABSTRACT
• Battery is connected to the electric vehicle has been considered as
the resource.
• It provides demand response to the service by controlling the
charging power.
• The smaller resource size requirement for charging an individual
electric vehicle is sufficient.
• Thus the charging service providers can minimize the charging cost
of an individual vehicle.
• Therefore the charging service provider benefits the vehicle
consumer by providing the demand response and regulation capacity.

4. INTRODUCTION
Electric vehicles have attracted significant attention because of
the potential to reduce carbon emissions in the transportation
sector. In order to encourage the use of electrical vehicles, the
governments of many countries give significant subsidies to electric
vehicels drivers due to the high cost of electrical vehicles and
chargers. From the perspective of the power systems, a battery-
connected electrical vehicles can act as a high-quality demand
response resource capable of rapidly reducing its charging power.
At the same time, electric vehicles are a flexible load that could be
controlled to provide regulation services to the electric. If a
communication infrastructure is in place, the electrical vehicles can
also provide highly valued flexibility in the power system using
the batteries of parked electrical vehicles.

5. OBJECTIVES
The main objective of this project is power transfer via airgap with
the help of electromagnetic induction proccess, It will charge the
electric vehicle’s battery without any cable connection from source to
battery. It can work properly within the limit of 3mm to 9mm airgap.
For this project following components are required:
• WIRELESS CHARGING
• ELECTROMAGNETIC PLATE
• ELECTRIC VEHICLE CHARGING SERVICE PROVIDER
• ELECTRIC VEHICLE
• FAST CHARGING SYSTEM

6. METHODLOGY
Design one electromagnetic plate which have two magnetic enameled
copper coil in which primary coil has 22 number of turns and secondary
coil has 32 number of turns. In this coil supply given by Smart Dc grid that
dc power converted into AC power with the help of harmonic oscillator.
After electromagnetic induction process rectifier connected between voltage
regulator and output terminal of secondary winding. This voltage regulator
is used for passing 5v to 12v constant voltage. The battery is connected with
the voltage regulator with respect to polarity. Arduino UNO(at mega 328) is
used for controlling the electric vehicle through command.
1. To design electromagnetic plate between grid and electric vehicle
2. To design wireless charging system
3. To design transmitter and reciever

7. ALGORITHM
• To supply 15V DC supply
• To connect oscillator with grid to generate AC waveform
• To give AC signal to the 1-phase transformer whose primary 22
turn and secondary 32 number of turn
• To connect output side of transformer with 1-phase rectifier to
produce DC voltage
• The dc voltage connected to voltage regulator to step down 12V
DC
• To charge 12V DC with battery charger.

8. FLOW CHART

9. BLOCK DIAGRAM

10. PRIMARY COIL (Transmitter Circuit)

11. TRANSMITTER HARDWARE

12. PRIMARY COIL SPECIFICATION
• Diameter of wire = 6mm copper type-magnet enamelled
• Diameter of coil (a)= 16.5cm, or 16.5/2.54= 6.5 inches
• Length of wire = 8.5cm, N1= numb of primary turn = 22
• L= (0.001*N1(a/2)^2)/(114a+254l) H
put the value in formula
L = 0.001×22× (0.165/2)2 / ((114×0.165) + (254×0.085)) H
L = 0.674 micro H
(Voltage Source, V dc- 30V Capacitors, C - 6.8 n F , L - 0.674 μ H)
F = 1/2*pi* sqrt (LC) = 0.5* 3.14* (0.674*10^-6 *6.8*10^-9)

13. SECNDARY COIL (Receiver circuit)

14. RECEIVER HARDWARE

15. RECEIVER CIRCUIT SPECIFICATION
• 16 awg wire (dia = 2mm)
• Coil diameter = 8cm= 0.08m
• numb of secondary winding turn = 32
• Length = 1 cm = 0.01m
L = 0.001 N2 (a/2)2 / (114a + 254l) H
Now we are applying the desired values for the coil,
L = 0.001×32× (0.08/2)2 / ((114×0.08) + (254×0.01)) H
L = 1.235 μ H
(Receiver coil, L: 1 .235 μ H)

16. MATHEMATICAL EXPRESSION FOR INDUCTIVE
COUPLING COFFICIENT
inductive coupling coefficient (m)= k* sqrt(L1+L2)
where design value of k = (0.1 to 0.5)
• m= 0.5 * sqrt(0.674+1.235) = 0.9545
• m= 0.4 * sqrt(0.674+1.235) = 0.5527
• m= 0.45*sqrt(0.674+1.235) = 0.6217
• m= 0.46*sqrt(0.674+1.235) = 0.6356
• m= 0.47*sqrt(0.674+1.235) = 0.6493
• m= 0.48*sqrt(0.674+1.235) = 0.6632
• m= 0.49*sqrt(0.674+1.235) = 0.6770
The above coefficient value depend upon the airgap between primay
and secondary winding.

17. HARDWARE

18. HARDWARE PREPRATION

19. HARDWARE

20. VIEW OF HARDWARE

21. HARDWARE

22. READY HARWARE

23. OUTPUT WITH RESPECT TO AIRGAP

24. COMPONENT SPECIFICATION
Transmitter section:
Voltage Source, V dc: 30V
Capacitors, C : 6.8 n F
Radio Frequency Choke,L1: 8.6 μ H
Radio Frequency Choke, L2: 8.6 μ H
Transmitter coil, L: 0.674 μ H
Resistors:
R1: 1K R2: 10 K R3: 94 ohm R4: 94
ohm R5: 10 K
Diodes:
D1: D4148 D2: D4148
Transistors:
MOSFET, Q1: IRF540
MOSFET, Q2: IRF540
Receiver Section:
Diode, D1, D2, D3, D4: D4007
Resistor, R 1k ohm Voltage
Regulator IC: IC LM 7805
Receiver coil, L: 1 .235 μ H
Capacitors:
C1: 6.8 n F C2: 220 μ F

25. WORKING PRINCIPLE
Basic principle of wireless charging is, in wireless charging there are
transmitter and receiver. DC supply from the smart-grid is converted
into high frequency alternating current. This high frequency ac
supplied to transmitter coil which further creates alternating magnetic
field that cuts the receiver coil and produces ac power output in
receiver coil. Then finally this ac power at receiver side rectified to dc
and fed to battery through voltage regulator. It’s not as efficient as a
direct cable connection between the battery and wire. Wireless
charging is around 60% - 70% efficient and it is done through a
wireless connection. But for day – to –day use just lining up the coils
and letting election electromagnetism do the rest is the simple value
proportion at the heart of wireless charging.

26. ADVANTAGES
 Easy to design because it can be easily connected reciver
circuit through the charging point.
 Increase efficiency of vehicles.
 Increase regulation of vehicles.
 Increase the sell of eletrical vehicles.
 It can be implimented on existing road.

27. CONCLUSION
We belive that charging can provide us with a convincing value
proposition when applied onto the Electric Vehicle market. We
aim to break into the market with as many charging station as
possible and gradually transform ourselves from a technology
solution provider to a charging service provider for all Electric
Vehicles.

28. REFERENCES
I. Department of Electrical and Computer Engineering,
University of Michigan 1301 Beal Ave., Ann Arbor, MI
48109 Phone: (805)698-2584, Fax: (734)763-8041, E-mail:
mikehaf@umich.edu
II. Toyota Technical Center, Toyota Engineering and
Manufacturing North America 1555 Woodridge Ave., Ann
Arbor, MI 48105 Phone: (617)452-2275, Fax: (734)995-
3053, E-mail: lorenzo.caminiti@tema.toyota.com
III. Department of Mechanical Engineering, Massachusetts
Institute of Technology 77 Massachusetts Ave., Cambridge,
MA 02139 Phone: (734)995-9330, Fax: (617)258-6156,

29. .
Thank you