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Design of a Wireless Power Transfer System Using Inductive Coupling and MATLAB Programming Apoorva.P1 Deeksha.K.S2 Pavithra.N3 Student, Dept

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Design of a Wireless Power Transfer System Using Inductive Coupling and MATLAB Programming Apoorva.P1 Deeksha.K.S2 Pavithra.N3 Student, Dept International Journal on Recent and Innovation Trends in Computing and Communication ISSN: 2321-8169 Volume: 3 Issue: 6 3817 - 3825 _______________________________________________________________________________________________ Design of a Wireless Power Transfer System using Inductive Coupling and MATLAB programming Apoorva.P1 Deeksha.K.S2 Pavithra.N3 Student, Dept. Of EEE, Student, Dept. Of EEE Student, Dept. Of EEE, Dr. T. Thimmaiah Institute of Dr. T. Thimmaiah Institute of Dr. T. Thimmaiah Institute of Technology Technology Technology K.G.F,India K.G.F, India K.G.F, India [email protected] [email protected] [email protected] Vijayalakshmi.M.N4 Somashekar.B5 David Livingston.D6 Student, Dept. Of EEE Asst Professor Dept. Of EEE, Asst Professor Dept. Of EEE, Dr. T. Thimmaiah Institute of Dr. T. Thimmaiah Institute of Dr. T. Thimmaiah Institute of Technology Technology Technology K.G.F, India K.G.F, India K.G.F, India [email protected] [email protected] [email protected] Abstract—Wireless power transfer (WPT) is the propagation of electrical energy from a power source to an electrical load without the use of interconnecting wires. It is becoming very popular in recent applications. Wireless transmission is useful in cases where interconnecting wires are difficult, hazardous, or non-existent. Wireless power transfer is becoming popular for induction heating, charging of consumer electronics (electric toothbrush, charger), biomedical implants, radio frequency identification (RFID), contact-less smart cards, and even for transmission of electrical energy from space to earth. In the design of the coils, the parameters of coils are obtained by using the basic calculations and measurements. The experimental results are presented and verified by using the MATLAB programming for the input and output wave forms. Keywords—Wireless power transfer, Electromagnetic Induction, MATLAB. __________________________________________________*****_________________________________________________ I. INTRODUCTION The goal of the present research is to develop a method of a) Size: The size of the transmitter or the receiver sometimes wireless power transmission. The idea of wireless power becomes too large to implement in a smaller system devices. transfer originated from the inconvenience of having too Thus by creating a wireless power transfer system, it would many wires sharing a limited amount of power sockets. We help clean up the clutter of wires around power sockets believe that many people have the same experience of making the space more tidy and lacking enough sockets for their electronic organized. b) Range: The range of wireless energy transfer is just a few Wireless power transfer can be divided into two major types meters, which represents a major hurdle towards its practical – electromagnetic induction and electromagnetic radiation. implementation. Electromagnetic induction can be of three type’s electrodynamics, electrostatic and evanescent wave c) Efficiency: Typical efficiency of wireless energy transfer coupling. Electromagnetic radiation can be divided into two ranges between 45% and 80% and is less efficient than categories – microwave power transfer (MPT) and laser. conventional wire based energy transfer methods. In our experiment we have considered electrodynamic or Electromagnetic Induction: It is the production of an inductive coupling. An inductive link is formed by a loosely induced voltage in a circuit which is excited by means of the coupled transformer consisting of a pair of coils that are magnetic flux. The condition for an induced current to flow usually placed in a coaxial arrangement .The external or the in a closed circuit is that the conductors and the magnetic primary coil is excited by an alternating current, and thus an field must rotate relative to each other electromagnetic field is produced with its magnitude Electromagnetic Radiation: Electromagnetic radiation dependent on the dimensions of the coil, the drive current travels through vacuum at the speed of light and propagates and the frequency of operation. A portion of the alternating by the interaction of time varying electric and magnetic flux lines generated this way link to the internal or the fields. It has a wavelength and a frequency. secondary coil, and the change in flux linkage produces a There are a number of limitations to the full implementation voltage in the secondary coil, which is proportional to the of wireless energy transfer: rate of change of the flux and the number of turns in the 3817 IJRITCC | June 2015, Available @ http://www.ijritcc.org _______________________________________________________________________________________ International Journal on Recent and Innovation Trends in Computing and Communication ISSN: 2321-8169 Volume: 3 Issue: 6 3817 - 3825 _______________________________________________________________________________________________ secondary coil (Faraday’s law of electromagnetic induction). converter or step-up converter) is a DC-DC power converter If the number of turns is n and the magnetic flux linking with an output voltage greater than its input voltage. It is a each turn is ψm, then the induced voltage for the circuit can switched-mode power supply (SMPS) containing one be written as, v=n (d ψm/dt). semiconductor (a transistor) and at least one energy storage element, a capacitor, inductor, or the two in combination. Hardware design for different turns in the receiver Booster circuit also power devices at small scale and transmitter coil is shown and the MATLAB applications, such as portable lighting systems. A LED programming is written for the input and output, finally the typically requires 3.3V to emit light. The transmitter coil comparative graph is plotted and checked for input and made up of copper turns of American Wire Gauge (AWG) output of hardware and programming. of 18 is used to transmit power wirelessly to the receiver coil. The receiver coil is also made up of same wire gauge as transmitter coil. The magnetic field generated by the II. BLOCK DIAGRAM transmitter coil couples with the receiver coil, exciting the coil and causing energy to build up in it. This energy is coupled out of the receiver coil to do useful work, for example, directly powering a load. The LED is used as a load. Filters made of capacitor (sometimes in combination with inductors) is used to the output to reduce output voltage ripple. The transmitter coil and receiver coil is constructed Fig.i Block Diagram of a Wireless power transfer system with 4.5cm radius and we have constructed both coils with 8 A. Source: The supply given here is 5V(DC). turns. B. Booster circuit: A booster circuit is a DC-DC power SPECIFICATIONS converter with an output voltage greater than its input TRANSMITTERCOIL SIDE voltage. It is of switched-mode power supply (SMPS) containing one semiconductor (a transistor), at least one Inputvoltage=5Volts energy storage element, a capacitor, an inductor, or the BD139Transistor two in combination. R = 1.5KΩ C =470pF C. Transmitter coil: The transmitter coil is the one which 1 C =4.7nF transmits power wirelessly to the receiver coil. 2 C3=100nF D. Receiver coil: The receiver coil is the one which receives Turns = 8 power from the transmitter coil. The receiver coil consists of filter circuit. RECEIVER COILSIDE E. Load: The load is an LED. D1 (IN4148) III. EXPERIMENT C4 = 4.7nF Turns = 5,8,10,15 Model picture for 8 turns (single load) Fig.ii Circuit Diagram of a Wireless Power Transfer System The fig. ii shows the circuit diagram of a wireless power Fig.iii Model picture of a Wireless Power Transfer transfer system. The input power to the system is DC supply System for single load of 5V is given. The booster circuit is also known as (boost 3818 IJRITCC | June 2015, Available @ http://www.ijritcc.org _______________________________________________________________________________________ International Journal on Recent and Innovation Trends in Computing and Communication ISSN: 2321-8169 Volume: 3 Issue: 6 3817 - 3825 _______________________________________________________________________________________________ IV Experimental Results Table 1.2: Receiver Coil of (5,8, 10, 15 turns) Table 1.1: Receiver Coil with 8 turns Experimental graph Experimental graph IV MATLAB PROGRAMMING MATLAB is a high-performance language for Model picture for multiple load technical computing. It integrates computation, visualization, and programming in an easy-to-use environment where problems and solutions are expressed in familiar mathematical notation. Typical uses include Math and computation Algorithm development Data acquisition Modeling, simulation, and prototyping Data analysis, exploration, and visualization Scientific and engineering graphics Application development, including graphical user interface building. MATLAB is an interactive system whose basic data element is an array that does not require dimensioning. This allows you to solve many technical computing problems, especially those with matrix and vector formulations, in a fraction of the time it would take to write a program in a scalar no interactive language such as C or Fig FORTRAN. The name MATLAB stands for matrix .iv Model picture of a Wireless Power Transfer System laboratory. MATLAB was originally written to provide easy for multiple load access to matrix software developed by the LINPAC and eispack projects. 3819 IJRITCC | June 2015, Available @ http://www.ijritcc.org _______________________________________________________________________________________
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