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Power Transfer] DEPARTEMENT OF ELECTRICAL & ELECTRONICS ENGINEERING wiTricity Wissam Zeidan – Salim Koteish – Hussein Al Ezzi Supervised By: Dr. Hussein Kassem [Wireless* INTRODUCTION: o The wireless power transfer (WPT) is a transmission of energy from one place to another without using wires, where distance can be short or long. o The wireless transmission is made possible by using various technologies. o Resonant inductive coupling which is one of the various power transmission techniques is demonstrated here. ANALYSIS: o Wireless Power Transfer relies on magnetic induction between a planar receiver and transmitter coils. When the receiver coil is positioned over the transmitter coil, magnetic coupling occurs when driving the transmitter coil. The resultant flux is coupled into the secondary coil, which induces a voltage and current flows. The secondary voltage is rectified, and power is wirelessly transferred to a load. o Inductive charging uses an electromagnetic field to transfer energy between two objects. o Greater distances can be achieved by using resonant inductive coupling. o The wireless transmission between two coils must resonate at the same frequency. o Human beings or other objects placed between the transmitter and receiver do not hinder the transmission of power o Magnetic fields tend to interact very weakly with the biological tissues of the body. And so are not prone to cause any damage to any living beings DESIGN: Step 1:Power source is converted into high frequency alternating current(AC),by the transmitter electronics. Step 2:High frequency AC flows in transmitter coil and generates an oscillating magnetic field. Step 3:Energy from the magnetic field induces AC in the receiver coil. Step 4:AC is then converted back into DC by the receiver electronics, providing power to the respective application. ADVANTAGES o Safe, fairly efficient, good range o No wires o No e-waste o Need for battery is eliminated o More secure, no risk shocked o Maintenance cost will be save o Range can be increased o Efficiency is about 75% DISADVANTAGES: o Wireless power transmission can be possible only in few meters o Field strengths have to be under safety levels o High frequency signals must be the supply CONCLUSION: o Wireless power transfer is quickly becoming a viable reality o This technology offers an extremely efficient alternative to previous attempts at providing wireless power o Future improvements in wireless technology offer world changing implications APPLICATIONS:

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Power Transfer]DEPARTEMENT OF ELECTRICAL & ELECTRONICS

ENGINEERING

wiTricityWissam Zeidan – Salim Koteish – Hussein Al Ezzi

Supervised By: Dr. Hussein Kassem

[Wireless*INTRODUCTION:

o The wireless power transfer (WPT) is a transmission of energy from one place to another without using wires, where distance can be short or long. o The wireless transmission is made possible by using various technologies. o Resonant inductive coupling which is one of the various power transmission techniques is demonstrated here.

ANALYSIS:o Wireless Power Transfer relies on magnetic induction between a planar receiver and transmitter coils. When the receiver coil is positioned over the transmitter coil, magnetic coupling occurs when driving the transmitter coil. The resultant flux is coupled into the secondary coil, which induces a voltage and current flows. The secondary voltage is rectified, and power is wirelessly transferred to a load. o Inductive charging uses an electromagnetic field to transfer energy between two objects.

o Greater distances can be achieved by using resonant inductive coupling.o The wireless transmission between two coils must resonate at the same frequency.o Human beings or other objects placed between the transmitter and receiver do not hinder the transmission of powero Magnetic fields tend to interact very weakly with the biological tissues of the body. And so are not prone to cause any damage to any living beings

DESIGN:Step 1:Power source is converted into high frequency alternating current(AC),by the transmitter electronics.Step 2:High frequency AC flows in transmitter coil and generates an oscillating magnetic field.Step 3:Energy from the magnetic field induces AC in the receiver coil.Step 4:AC is then converted back into DC by the receiver electronics, providing power to the respective application.

ADVANTAGESo Safe, fairly efficient, good range o No wires o No e-wasteo Need for battery is eliminated

o More secure, no risk shockedo Maintenance cost will be saveo Range can be increasedo Efficiency is about 75%

DISADVANTAGES:o Wireless power transmission can be possible only in few meterso Field strengths have to be under safety levelso High frequency signals must be the supplyCONCLUSION:o Wireless power transfer is quickly becoming a viable realityo This technology offers an extremely efficient alternative to previous attempts at providing wireless powero Future improvements in wireless technology offer world changing implications

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