Wireless power transmission via resonance coupling.
- 1. BALOCHISTAN UNIVERSITY OF INFORMATION TECHNOLOGY, ENGINEERING & MANAGEMENT SCIENCES
- 2. Group Members: 2 12/7/2014 Electronics Engineering
- 3. Introduction Wireless electricity or witricity is the transfer of electric energy or power over a distance without the use of wires. In order for the energy to be transferred safely coupled resonators are used. Coupled resonators are two objects of the same resonant frequency that exchange energy efficiently without much leakage . 3 12/7/2014 Electronics Engineering
- 4. Block Diagram: 4 12/7/2014 Electronics Engineering
- 5. Transmitter Section: DC power Source: Step-Down transformer, rectifer circuit convert that AC voltage to DC signal Oscillator Circuit: Royer Oscillator(achieve a high oscillating current for the transmitter coil). Transmitter Coil: L= d2n2/(l+0.45d) The operating frequency of the oscillator is determined by the resonance formula given below F = ½ × π × √ (LC) 5 12/7/2014 Electronics Engineering
- 6. Receiver Section: Receiver coil: Rectifier circuit and a voltage regulator IC: LM 7805 voltage regulator IC The rectifier circuit in the receiver section converts this AC voltage in to DC 6 12/7/2014 Electronics Engineering
- 7. METHODS USED FOR WIRELESS POWER TRANSMISSION 7 12/7/2014 Electronics Engineering Far Field Electricity Transmission Radio/Microwave Power transmission Laser Power Transmission Near Field Electricity Transmission Inductive Charging Evanescent/Resonant Wave Coupling
- 8. INDUCTION (INDUCTIVE COUPLING): • The simplest example for wireless energy transfer using this method is the electrical transformer. • The main drawback of this method is the short range. • A larger, stronger field can be used for energy transfer over large distance, but this process is extremely inefficient. Since magnetic field spreads in all direction, making a large wastage of energy. 8 12/7/2014 Electronics Engineering
- 9. Power is transmitted when the coils have same resonant frequency. By using resonant induction one coil can send electricity to several receiving coils as long as they all resonate at same frequency. Resonance : It is the tendency of a system to oscillate with larger amplitude at some frequencies than at others. 9 12/7/2014 Electronics Engineering
- 10. Why not wires?? As per studies, most electrical energy transfer is through wires. Most of the energy loss is during transmission On an average, more than30% In Pakistan, it exceeds by 40% Why not batteries?? Estimated that 40 billion batteries per year add to the e-waste burden. And of course its not a good sign. 10 12/7/2014 Electronics Engineering
- 11. Advantages and Hurdles It can do away with costly grids and substations. Homes and cities can be provided power wireless from a central transmission point. Battery operated devices will never run out of power. we can have cars that run non-stop with full battery charge. We will never have to go to charging station. Aircraft can fly nonstop with no need to refuel. The future highway could have inductive coils imbedded in the road. Hurdles/ Disadvantages: Biological Drawbacks (line of sight of microwave and Laser signal). Economic cost. Less efficiency. Short distance.(2cm) 11 12/7/2014 Electronics Engineering
- 12. Scope no need of power cables. no need of charging batteries, or buying new batteries for your electrical gadgets. 12 01/12/2014 Electronics Engineering
- 13. Gantt Chart 13 12/7/2014 Electronics Engineering
- 14. References: A next generation power transmission system”, International Journal of Computer Applications (0975 – 8887) (Volume 1 – No. 13) Witricity Peter Vaessen,” Wireless Power Transmission”, Leonardo Energy, September 2009 11/2/14 Wireless Power www.wikipedia.com http://www.sciencedirect.com/science/journals 14 12/7/2014 Electronics Engineering