International Journal of Engineering Trends and Technology (IJETT) – Volume 23 Number 7- May 2015
Electrical Load Utilisation Using Wireless
Power Transmission by Magnetic Resonance
Coupling
Zeeshan Alam1, Vikash Kumar Prasad2, Lingesh R A3, Kiran Kumar M4, Vani H V5
1,2,3
U.G Student, EEE Dept, SJMIT, Chitradurga, Karnataka, India
4
Assistant prof. Department of EEE, SJMIT, Chitradurga, Karnataka, India
5
Associate prof. Department of EEE, SJMIT, Chitradurga, Karnataka, India
Abstract: Wireless power transmission is the
transmission of electrical energy without using any
conductor or wire. It is useful to transfer electrical
energy to those places where it is hard to transmit
energy using conventional wires. The advent of
various wireless technologies have revolutionized
the communication infrastructure and consequently
changed the entire world into a global village. Use
of wireless technology has also been made for
transmission of electric power wirelessly. It can
reduce heavy line losses; increase the portability of
power systems. It also integrates the communication
technologies and electric power to the same
platform.
Keywords: Maximum power transfer theorem,
Resonance frequency, Magnetic Resonance, Quality
Factor & Impedance Matching
1.INTRODUCTION
Wireless power transmission (WPT) is an
efficient way for the transmission of electric power
from one point to another through vacuum or
atmosphere without the use of wire or any substance.
By using WPT, power can be transmitted using
inductive coupling for short range, resonant induction
for mid-range and Electromagnetic wave power
transfer. By using this technology, it is possible to
supply power to places, which is hard to do using
conventional wires. Currently, the use of inductive
coupling is in development and research phases. The
most common wireless power transfer technologies
are the electromagnetic induction and the microwave
power transfer. The microwave power transfer has a
low efficiency. For near field power transfer this
ISSN: 2231-5381
method may be inefficient, since it involves radiation
of electromagnetic waves. Wireless power transfer
can be done via electric field coupling, but electric
field coupling provides an inductively loaded
electrical dipole that is an open capacitor or dielectric
disk. Extraneous objects may provide a relatively
strong influence on electric field coupling. Magnetic
field coupling may be preferred, since extraneous
objects in a magnetic field have the same magnetic
properties as empty space. Electromagnetic induction
method has short range. Since magnetic field
coupling is a non-radiative power transfer method, it
has higher efficiency. However, power transfer range
can be increased by applying magnetic coupling with
resonance phenomenon applied on. A magnetic field
is generated when electric charge moves through
space or within an electrical conductor. The
geometric shapes of the magnetic flux lines produced
by moving charge (electric current) are similar to the
shapes of the flux lines in an electrostatic field. The
mutual induction phenomena between two coils work
on the principle that if there is a continuous varying
current passes through one coil produces the
magnetic field in the space around first coil called
primary coil. As this varying magnetic field interacts
with the secondary coil it produces an induced
current in the secondary coil. This is also called
magnetic resonance between two coils operating at a
same resonance frequency. Principle of mutual
induction is elaborated in Fig 1 below.
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International Journal of Engineering Trends and Technology (IJETT) – Volume 23 Number 7- May 2015
Fig 1. Wireless power transmission by strong
magnetic resonance
2. PREVIOUS WORK
[1] A. Mahmood, et al published paper on “A
Comparative
Study
of
Wireless
Power
Transmission Techniques” They proposedthe
advent of various wireless technologies have
revolutionized the communication infrastructure and
consequently changed the entire world into a global
village. Use of wireless technology has also been
made for transmission ofelectric power wirelessly. It
can reduce heavy line losses; increase the portability
of power systems. It also integrates the
communication technologies and electric power to
the same platform. This paper presents a
comprehensive review and detailed analysis of
various techniques used for wireless power
transmission. Role of wireless power transmission in
applications of smart grid like electric vehicle
charging has also been covered. Feasibility,
implementations, operations, results and comparison
among different methods have been elaborated in
order to identify the favorable and economical
method for low power and small distance
applications.
with a capacitor with its own resonating frequency. In
any system of coupled resonators there often exists a
so-called “strongly coupled” regime of operation. If
one ensures to operate in that regime in a given
system, the energy transfer can be very efficient.
Another technique includes transfer of power through
microwaves using rectennas.This is particularly
suitable for long range distances ranging kilometers.
With this we can avoid the confusion and danger of
having long, hazardous and tangled wiring. This
paper as a whole gives an effective, high performance
techniques which can efficiently transmit the power
to the required area varying in distances.
3. BLOCK DIAGRAM
Fig 2.Basic structure of power supply ckt.
4. PROPOSED METHODOLOGY
[2] VikashChoudhary, et al published on “Wireless
Power Transmission: An Innovative Idea” They
proposed that original idea to eradicate the hazardous
usage of electrical wires which involve lot of
confusion in particularly organizing them. Imagine a
future in which wireless power transfer is feasible:
cell phones, household robots, mp3 players, laptop
computers and other portable electronics capable of
charging themselveswithout ever being plugged in,
freeing us from that final, ubiquitous power wire.
Some of these devices might not even need their
bulky batteries to operate. This paper includes the
techniques of transmitting power without using wires
with an efficiency of about 95% with non-radiative
methods. Due to which it does not affect the
environment surrounding. These techniques Includes
resonating inductive coupling in sustainable moderate
range. The coupling consists of an inductor along
ISSN: 2231-5381
Main intention of our project is to transmit
high power frequency wirelessly for different
applications. A 230V, 50Hz supply is taken from the
supply from pin socket. The ratio of the transformer
is 1:1. The output voltage of the transformer is 15V.
This voltage is fed to the Bridge wave rectifier where
the AC voltage is converted to DC voltage. This DC
voltage is fed to the transistorized RC phase shift
oscillator with negative feedback is used which uses
a common emitter single stage amplifier and a phase
shifting network consisting of three identical RC
sections. This oscillator will be already built in PIC
Microcontroller PIC16F616. The main reason for
using oscillator is to generate a system frequency
suitable for transmission of power to the desired load
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International Journal of Engineering Trends and Technology (IJETT) – Volume 23 Number 7- May 2015
since the maximum power transfer takes place when
the source impedance will be equal to the load
impedance under resonance frequency of magnetic
resonance coupling between source & load. The
output frequency of the oscillator is 1.2 KHz is
transmitted to transmitting coil through the copper
wound wire around 15-20 turns. When the receiving
coil is brought near to transmitting coil, due to
Faraday’s law of Electro-Magnetic Induction, an
EMF is induced in the receiving coil also which
makes the circulation of current in that coil & load
connected to that coil will utilize power wirelessly
without any transmission wires between transmitting
coil & receiving coil. Here we use the magnetic
coupling of two coils under resonance condition for
transmission of maximum power between source &
load. Thus the title given to this paper is
“ELECTRICAL LOAD UTILISATION USING WIRELESS
POWER TRANSMISSION BY MAGNETIC RESONANCE
COUPLING”.
Fig3. transmitting part of the circuit
Fig5. wireless
transmitter to receiver
power
transfer
from
5. RESULT
After examining the block diagram, the
circuit is designed to implement the wireless power
transmission of high power frequency. The
connections are made on the Printed Circuit Board
which follows the step by step components of block
diagram. The input 230V taken from supply is
converted to 15V and again converted to DC using
bridge wave rectifier. This 15V DC is used as an
input to RC phase shift oscillator built in PIC16F616.
The output of this oscillator is 1.2 KHz & is used for
transmitting high frequency power to transmitting
coil made of copper wound wire of several turns. The
receiving coil with same number of turns is brought
near transmitting coil and EMF induced in it resulting
in circulation of current. This current is utilized for
lightning of LED lights & Mobile charging which are
resistive & capacitive loads respectively. In this
project, we can use load of induction type also for
example take a fan of computer used for cooling
purpose. The number of resistors are connected to the
pins of PIC16F616 is used to dissipate power which
is in the form of heat which will give rise to severe
heating of the transmitter circuit. In receiver circuit,
we used two voltage regulators. Each voltage
regulator is used for 4 parellel combination of LED’s.
Since there are 8 lines of LED’s connected in
parallel, we have used 8 voltage regulators.
Fig4. Receiving part of the circuit
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International Journal of Engineering Trends and Technology (IJETT) – Volume 23 Number 7- May 2015
6 . CONCLUSION
The goal of this project was to design and
implement a wireless power transfer system via
magnetic resonant coupling. After analyzing the
whole system systematically for optimization, a
system was designed and implemented. Experimental
results showed that significant improvements in
terms of power-transfer efficiency have been
achieved. Measured results are in good agreement
with the theoretical models. We have described and
demonstrated that magnetic resonant coupling can be
used to deliver power wirelessly from a source coil to
a with a load coil. The wireless power energy concept
is indeed a great and a noble one. It has entirely
changed the concept of power transmission. It has the
potential to bring complete revolution in scientific
development. Ranging from charging of the handset
up to the reduction in global warming; wireless
power transmission has many applications and
solutions. It could reduce the human dependency on
the fossil fuels and other petroleum products due to
its efficiency in order to achieve sustainable
development. Researchers are trying to make this
technology more efficient and to overcome the
challenges being faced. Though the practical
implementation of this technology is quiet limited
due to the technological barriers but this could be the
biggest breakthrough in the field of power
transmission.
REFERENCES
[1] A. Mahmood, A. Ismail, Z. Zaman, H. Fakhar, Z.
Najam, M. S. Hasan, S. H. Ahmed.“A Comparative Study
of Wireless Power Transmission Techniques” J. Basic.
Appl. Sci. Res., 4(1)321-326, 2014 © 2014, TextRoad
PublicationISSN 2090-4304 Journal of Basic and Applied
Scientific Research.
[2] Vikash Choudhary, Satendar Pal Singh, Vikash Kumar
and Deepak Prashar “Wireless Power Transmission: An
Innovative Idea” International Journal of Educational
Planning & Administration. ISSN 2249-3093 Volume 1,
Number 3 (2011), pp. 203-210 © Research India
Publications.
[3] Thejus Raj.H, Govarthan.K, Vivek.R, Thamarai.P
“MUTUAL COUPLING ANALYSIS OF MOBILE
BOT”. International Journal of Advanced Technology in
Engineering and Science Volume No.03, Issue No. 03,
March 2015.
[4] Zia A. Yamayee and Juan L. Bala, Jr.,
“Electromechanical Energy Devices and Power Systems”,
John Wiley and Sons, 1947, p. 78
[5] Simon Ramo, John R. Whinnery andTheodore Van
Duzer, “Fields and Waves in Communication Electronics”,
John Wiley & Sons, Inc.; 3rd edition (February 9, 1994)
[6] S. Kopparthi, Pratul K. Ajmera, "Power delivery for
remotely located Microsystems," Proc. of IEEE Region 5,
2004 Annual Tech. Conference, 2004 April 2, pp. 31-39.
7. FUTURE SCOPE
The wireless power energy concept is indeed
a great and a noble one. It has entirely changed the
concept of power transmission. It has the potential to
bring complete revolution in scientific development.
Ranging from charging of the handset up to the
reduction in global warming; wireless power
transmission has many applications and solutions. It
could reduce the human dependency on the fossil
fuels and other petroleum products due to its
efficiency in order to achieve sustainable
development. We have reviewed and compared
different methods of wireless power transmission.
Different applications in context of smart grid,
Researchers are trying to make this technology more
efficient and trying to overcome the challenges being
faced. Though the practical implementation of this
ISSN: 2231-5381
technology is quiet limited due to the technological
barriers but this could be the biggest breakthrough in
the field of power transmission.
[7] Yeoh, W (2010). Wireless power transmission (WPT)
application at 2.4 GHz in common network.
[8] KUMAR, SANJAY, et al (2012). Wireless power
transmission- a prospective idea for future. Undergraduate
Academic Research Journal (UARJ), ISSN: 2278 – 1129,
Volume-1, Issue-3,4.
[9] Summerer, Leopold, and Oisin Purcell (2009). Concepts
for wireless energy transmission via laser. Europeans Space
Agency (ESA)-Advanced Concepts Team.
[10] Miller, John M., et al. Wireless power transfer. Oak
ridge National Laboratery’ s Power Electronics
Symposium..
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International Journal of Engineering Trends and Technology (IJETT) – Volume 23 Number 7- May 2015
[11] Karalis, Aristeidis, John D. Joannopoulos, and Marin
Soljačić (2008). Efficient wireless non-radiative
midrangeenergy transfer. Annals of Physics323.1: 34-48.
UBDTCE. Areas of interest is power system,
power electronics, advanced control system.
[12] Vaessen, Peter (2009). Wireless power transmission.
KEMA,
September
(http://www.leonardoenergy.org/sites/leonardoenergy/files/
root/pdf/2009/WirelessPower.pdf)
BIOGRAPHY
[1]
ZeeshanAlam U.G student
,EEE dept , SJMIT
Chitradurga , Karnataka,
India
[2]
Vikash Kumar Prasad
U.G
student EEE dept,
SJMIT
Chitradurga
,Karnataka ,India
[3]
Lingesh R A U.Gstudent
EEE
dept
,SJMIT
chitradurga ,Karnataka ,
india
[4]
Kiran Kumar M working
as Assistant Professor in
Dept of EEE,S.J.M.I.T.,
Chitradurga,Karnataka,
India,he completed B.E
(EEE) in 2009 and M.tech
(Energy systems) in 2011.areas of interest wind
energy conversation systems, solar energy,
power systems.
[5]
Vani
H.V
presently
working as Associate
Professor in Dept. of
EEESJMIT, Chitradurga
Karnataka, India.
Completed B.E (EEE) in
the year 2001 from UBDTCE and M.Tech
(power system power electronics) in 2010 from
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