This document discusses wireless power transmission (WPT), including its history, types, techniques, advantages, disadvantages, and applications. WPT involves transmitting energy from one place to another without wires. It describes two main types - magnetic coupling and inductive coupling. Inductive coupling works using two coils - a transmitter coil that converts DC to high frequency AC and a receiver coil that converts it back to DC. WPT has advantages like reliability, efficiency, and low maintenance compared to wired systems. Some applications mentioned are charging electric vehicles and consumer electronics.

1. Presented by-
Bhoor singh Meena(2013BTEE002)
Niranjan Kumar Sah(2013BTEE007)
Sandeep (2013BTEE013 )

2.  What is wireless power transmission(WPT)?
 Why is WPT?
 History of WPT
 Types of WPT
 Techniques to transfer energy wirelessly
 Advantages and disadvantages
 Applications
 Conclusion
 References

3.  The transmission of energy from one
place to another place without using wires.
 Conventional energy transfer is using wires.
 But, the wireless transmission is made
possible by using various technologies.

4.  Reliable
 Efficient
 Fast
 Low maintenance cost
 Can be used for short-range
or long-range.

5.  Nikola Tesla in late 1890s.
 Pioneer of induction techniques.
 His vision for “World Wireless System”.
 The 187 feet tall tower to broadcast energy.
 He managed to light 200 lamps from a
distance of 40km.

6.  The transfer of energy
• Magnetic coupling
• Inductive coupling.
 Simplest Wireless Energy coupling is a
transformer.

7.  Primary and secondary coils are not
connected with wires.
 Energy transfer is due to Mutual Induction.

9.  Works on the principle of inductive
coupling.
 Contains two sections-The
Transmitter section and the Receiver section.
 Transmitter coil converts the DC
power to high frequency AC signal.
 Receiver coil receives the power and
convert it into AC signal.

11.  Description
DC power Source: It consists of a step down
transformer that step downs the supply voltage
to a desired level, and a rectifier circuit
convert that AC voltage to DC signal.
 Oscillator Circuit: A modified Royer Oscillator
circuit is used in our project. With this circuit
we can easily achieve a high oscillating
current for the transmitter coil.
 Two N channel enhancement power MOSFET
are used.

12. The transmitter coil L(inductor)
 Resistors R1,R2,R3 and R4 (works as a biasing
network for Q1&Q2)
 The operating frequency of the oscillator is
determined by the resonance formula given
below
F = 1/2 × π × √ (LC)

13.  Consists of receiver coil.
 Rectifier circuit and a voltage regulator IC.
 The rectifier circuit in the receiver section
converts this AC voltage in to DC.
 Voltage control IC helps to provide a constant
limited regulated output voltage to the load
for charging.

15.  LZ805CV voltage regulator IC is used.
 The IC gives a regulated 5V as its output.
 It don’t allow more than 5V to the output.
 Copper coil having diameter of 8cm is used.

16.  No wires.
 No e-waste.
 Need for battery
is eliminated.
 Efficient energy
transfer using RIC.
 Harmless, if field
strengths under safety
levels.

17.  Distance constraint.
 Field strengths have to be under safety levels.
 Initial cost is high.
 In RIC, tuning is difficult.
 High frequency signals must be the supply.
 Air Ionization technique is not feasible

18.  Near-field energy transfer
Electric automobile charging
Static and moving
Consumer electronics
Industrial purposes
Harsh environment
 Far-field energy transfer
Solar Power Satellites
Energy to remote areas

19.  Transmission without wires.
 Efficient.
 Low maintenance cost. But, high initial cost.
 Better than conventional wired transfer.
 Energy crisis can be decreased.
 Low loss.
 In near future, world will be completely
wireless.

20.  S. Sheik Mohammed, K. Ramasamy,
T. Shanmuganantham,” Wireless
power transmission – a next
generation power transmission
system”, International Journal of
Computer Applications (0975 – 8887)
(Volume 1 – No. 13)
 Peter Vaessen,” Wireless Power
Transmission”, Leonardo Energy,
September 2009

21. THANK YOU!