HIGH POWER DENSITYZ-SOURCE
RESONANT WIRELESS CHARGER
WITH LINE FREQUENCY SINUSOIDAL
CHARGING
Active Galaxy (An Engineering Idea), Chennai
gk.activegalaxy@gmail.com | +91 9655123644 |
www.activegalaxy.in
Head Office : No.10, Second Floor, Durga Street,
South Kamaraj Nagar, Tambaram Sanatorium,
Chennai -45
ABSTRACT
 Research on wireless power transfer (WPT) for EV battery charger is actively carrying on, for
the sake of its advantages of convenience, reliability and environmental adaptation.
 A proper energy storage and charging system design could reduce to about 20% battery
capacity of the on-line electric vehicle (OLEV), minimizing the weight and cost.

Electric vehicles (EVs) have recently received a great deal of attention due to their clean,
efficient, and environmentally friendly nature. Nowadays, most commercial EVs are plugged
into the grid to charge their batteries.
 Due to advantages such as increased user convenience and better safety in comparison to
plug-in chargers, inductive power transfer (IPT) in EVs has been researched and developed by
many laboratories and companies all over the world .
 A set of loosely coupled coils instead of a conventional transformer is the major difference
between an IPT charger and a conductive charger.
EXISTING SYSTEM
 Conventional on-board battery charger (OBC) is usually a two-stage structure,
front-end PFC and cascaded DC/DC converter, with high-frequency transformer.
 Two-stage structure separates the optimization goals for PFC function and load
regulation.
DRAWBACKS
 More switches
 High cost
 Low efficiency
PROPOSED SYSTEM
•
The WPT system can be simplified as one voltage source vH and a resonant
network with all the parameters reflected to primary side.
•
The voltage source vH is the output of H-bridge and vH contains different
frequency components.
•
Zp and Zs are primary side impedance and secondary side impedance respectively.
•
Zo represents the output impedance.
•
N is the turn ratio.
•
The impedance from the output terminals of H-bridge is ZH.
ADVANTAGES
•
ZSRC is a single-stage solution with low cost and high efficiency for EV wireless
charger application.
•
To further reduce the size of bulky capacitors in single phase application, sinusoidal
charging technique has been applied to the ZSRC.
•
Power factor correction and load regulation
BLOCK DIAGRAM
APPLICATIONS
•
Electric vehicle
•
Battery charging