it is ppt on wireless mobile chager using inductive coil.

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!