This presentation discusses wireless power transfer for electric vehicle charging systems. It introduces various wireless power transfer methods like electromagnetic induction and microwave radiation. Electromagnetic induction involves using a transmitter coil to generate a magnetic field that induces a voltage in a receiver coil. The presentation compares different techniques and outlines a project to design a wireless charging system using an inverter, transmitter and receiver coils, and rectifier. It also discusses components like ICs, Arduino, and coil design considerations. The expected outcomes are wireless battery charging for applications like pacemakers to eliminate regular operations and enabling electric vehicles to charge safely at regular distances.

1. A Presentation on
Wireless Power Transfer for Electrical
Vehicle Charging System
Under the guidance of,
Mr. A.SRINIVAS sir
Assistant professor
Presented by,
P.HARI PRASAD,

2. CONTENTS:
• Abstract
• Various methods to transfer power wirelessly
• Comparison of various techniques
• Block diagram of project
• Various methods of firing an inverter
• 555 IC and NOT gate
• Arduino
• Transmitter and receiver coil design
• Rectifier design
• Simulation circuit
• Expected outcomes
• Plan of action

3. ABSTRACT
Since the time of Nikola Tesla’s first experiments with
Wireless Power Transfer, a remarkable change in the field of
Electrical Engineering which eliminates the use of
conventional copper wires occurred. Based on this concept, the
project is to be developed to transfer power in a very small
range.

4. Contd…
This project can be used to charge batteries those are not
to be connected electrically, such as pace makers implanted in
the body that runs on battery. Patients are required to be
operated every year to replace the battery. So, our project is
designed to charge the battery wirelessly for the purpose. As it
is not possible to be demonstrated, we are going to charge
electric vehicle through wireless power.

5. VARIOUS METHODS TO TRANSFER POWER
WIRELESSLY
ELECTROMAGNETIC INDUCTION:
• Electrostatic induction
• Electrodynamic induction
• Magnetic resonant induction
ELECTROMAGNETIC RADIATION:
• Microwave/RF power
• Light/laser power

6. COMPARISION OF VARIOUS TYPES OF WPT
TECHNIQUES
Microwave
Power
Resonant Inductive
Electromagnetic
inductive
Distance Long Low Low
Frequency (1-30) MHz (20-200) KHz (1-2) MHz
Transmitter &
Receiver
Devices
Rectennas
Tuned wire coils, Lumped
element Resonators
Inductive
coils(primary and
secondary coils)
Power level Low / Medium High Low
Cost Medium Medium Low
Application
Solar Power
Satellites.
Powering drone
aircrafts
Electric Vehicle Battery
Charging, Powering Busses,
Trains MAGLEV, RFID,
Smart Cards.
Mobile
charging,charging of
laptops and other
electronic devices.
Efficiency Medium Medium Low

7. ELECTROMAGNETIC INDUCTION
• It consists of a transmitter coil and a receiver coil. Both coils
form a system of magnetically coupled inductors. An
alternating current in the transmitter coil generates a magnetic
field which induces a voltage in the receiver coil. This voltage
can be used to power a mobile device or charge a battery.

8. BLOCK DIAGRAM OF PROJECT
POWER
SUPPLY
HIGH
FREQUENCY
INVERTER
TRANSMITTER
COIL
RECEIVER
COIL
RECTIFIERLOAD

9. Contd….
• In this, power is transferred over short distance by magnetic
fields using inductive coupling between coils of wire or in a
few devices by electric fields using capacitive coupling
between electrode .
• The DC supply is converted to high frequency (20kHz)AC by
using an inverter. This AC is given to a transmitter coil which
produces a magnetic field.
• A receiver coil at the load end will develop an equivalent emf
by Faraday’s law of electromagnetic induction. This high
frequency AC is again converted to DC using a rectifier and is
given to the load.

10. VARIOUS METHODS OF FIRING AN INVERTER

11. VARIOUS ICs AVAILABLE
• 555 timer
• PWM chip SG3524
• MAX038
• HCPL 3120/J312
• 74HC14
• 74HCT14
• HEF40106B
• SN74LVC2G14

12. 555 IC AND NOT GATE

13. PULSES GENERATED FROM 555 IC AND
NOT GATE

14. ARDUINO
Arduino is a open-source platform used for building
electronics projects. Arduino consists of both a physical
programmable circuit board and software that runs on your
computer, used to write and upload computer code to that
physical board.

15. ARDUINO PROGRAM
//-------------Program developed by Rahma-----------//
int out1 = 8;
int out2 = 7;
void setup()
{
pinMode(out1,OUTPUT);
pinMode(out2,OUTPUT);
}
void loop()
{
digitalWrite(out2,LOW);
digitalWrite(out1,HIGH);
delay microseconds(50);
digitalWrite(out1,LOW);
digitalWrite(out2,HIGH);
delay microseconds(50);
}
//-------------Program developed by Rahma----------//

16. WAVEFORMS GENERATED USING
ARDUINO

17. TRANSMITTER COIL DESIGN
The inductance L of a rectangular coil can be estimated
with the following equation:
where a, b, r, n stand for the length, width, and radius of the
wire used to construct the coil, and the number of turns of the
coil, respectively.

18. RECEIVER COIL DESIGN
The inductance L of a circular coil can be estimated with
the following equation:
where R stands for the average radius of the coil, r stand for
the radius of the wire and n stands for number of turns.

19. TRANSMITTER AND RECEIVER ALLIGNMENT
When the receiver coil is positioned above the transmitter
coil at a height h, the coupling coefficient K between the coils
is proportional to the ratio of the overlapped area of the coils
to the area of the transmitter coil and inversely proportional to
the third power of the distance between the coils. K can be
estimated with the following equation

20. RECTIFIER
• A diode bridge is an arrangement of
four (or more) diodes in a bridge
circuit configuration that provides the
same polarity of output for either
polarity of input.

21. SIMULATION CIRCUIT

22. EXPECTED OUTCOMES
• The concept of wireless power transfer enables us to charge
batteries of pace makers and helps the patients to get rid of
regular operations.
• Safe power transfer to applications that need to remain sterile
or hermetically sealed.
• We are able to reduce the capacity of the batteries required for
vehicle charging as they can be charged at regular distances.
• We are able to reduce the road accidents providing an ethical
value by reducing the speed of vehicles at charge points.

23. PLAN OF ACTION
S.No Action Plan Completed Date
01 Submission of Registration letter 12/08/2016
02 Submission of Area of Project 20/08/2016
03 Submission of Problem Identification letter 09/09/2016
04 Submission of Abstract of the project 26/09/2016
05 Submission of PEO and PO mapping 10/10/2016
06 Submission of Literature survey report 31/10/2016
07 Analysis of transmitter and receiver circuits 02/12/2016
08 Gathering the data of equipments for designing the
hardware
09/12/2016
09 Purchasing of components required for our project 30/01/2017
10 Circuit design and Hardware work completion 15/02/2017
11 Testing the hardware kit for results 18/02/2017
12 Submission of rough documentation of the project 04/03/2017
13 Submission of kit along with Soft copy and Hard copy of
the project
15/03/2017