This document summarizes a technical seminar presentation on contactless bus charging systems. It introduces contactless charging technology that enables power transfer across an air gap without physical connections. It then discusses the motivation for contactless electric vehicle charging and describes static and dynamic wireless charging systems. Key details are provided on a 85 kHz, 44 kW wireless charging specification and its applications. The document concludes that contactless charging can eliminate charging time and support zero-emission public transportation.

1. GUIDED BY:
Dr. Anguraja R
HOD,
Dept of EEE,DBIT
DEPARTMENT OF ELECTRICALAND ELECTRONICS ENGINEERING
TECHNICAL SEMINAR REVIEW - 2
TOPIC NAME: CONTACTLESS BUS CHARGING SYSTEM
SUBMITTED BY:
M V Shashank Yadav
1DB18EE018

2. CONTENTS
 INTRODUCTION
 MOTIVATION
 WIRELESS CHARGING SYSTEM FOR EVS
 BLOCK DIAGRAM
 SPECIFICATION
 ADVANTAGES
 CONCLUSION

3. INTRODUCTION
 Contactless charging technology enables contactless power transfer from a power
source such as charger to a load such as a mobile device conveniently across an air
gap by eliminating the bunch of wire. Contactless power transmission involves the
exchange of power without the need for physical connections.
 Wireless Charging Systems (WCS) have been proposed in high-power applications,
including EVs , and plug-in electric vehicles (PEVs) in stationary applications. In
comparison with plug-in charging systems, WCS can bring more advantages in the
form of simplicity, reliability, and user friendliness.

4. MOTIVATION
 The motivation towards working in this project is to charge the
battery by using contactless charger.
 The technology will replace cables and standardize on one
interface, potentially being able to charge battery.
 The project is meant to charge quickly and efficiently by
inductive coupling without the help of wires.

5. BLOCK
DIAGRAM

6. WIRELESS
CHARGING
SYSTEMS
The wireless charging systems can be divided into two
types:
 Static Wireless Charging
 Dynamic Wireless Charging

7. STATIC WIRELESS CHARGING
 As the name indicates, the vehicle gets charged when it remains static. So here we
could simply park the EV at the parking spot or in garage which is incorporated
with WCS. Transmitter is fitted underneath the ground and receiver is arranged in
vehicle’s underneath. To charge the vehicle align the transmitter and receiver and
leave it for charging. The charging time depends on the AC supply power level,
distance between the transmitter & receiver and their pad sizes.
 This SWCS is best to build in areas where EV is being parked for a certain time
interval.

8. Dynamic Wireless Charging System
As the name indicates here vehicle get charged while in motion. The
power transfers over the air from a stationary transmitter to the receiver
coil in a moving vehicle. By using DWCS EV's travelling range could
be improved with the continuous charging of its battery while driving
on roadways and highways. It reduces the need for large energy storage
which further reduce the weight of the vehicle.

9. Specification of 85 kHz band 44
kW wireless charging system
ITEM Specification
Input power 3 phase 200V
Transfer frequency 85KHz
Receive power 44 kW
Transmission distance between
charging pads
10.5 cm min
Radio communication for
control
2.4 GHz wireless LAN

10. Applications
 Cargo transportation in airports
 container transports at harbours
 cargo transporters in warehouses
 Public transport

11. ADVANTAGES
 Reduce amount of cables and power adapter
 No fuel required
 Avoid sparkle and electrical shock
 Static and Moving charging
 Zero carbon dioxide emission
 Very high transmission efficiency over a long
distance

12. CONCLUSION
 This paper illustrates a method for contactless transfer of
electric energy.
 Zero-emission public transportation has become an
important issue around the word.
 The contactless charging system can eliminate the
charging time spent

13. THANK
YOU