SLIDE 1
Why Wireless Charging?
Clip art from Juperimages.com/123RF. com/Clker.com
The Wireless Cell Phone Chargers EEL 4914 Senior Design Project - - PowerPoint PPT Presentation
The Wireless Cell Phone Chargers EEL 4914 Senior Design Project - - PowerPoint PPT Presentation
The Wireless Cell Phone Chargers EEL 4914 Senior Design Project University of South Florida Electrical Engineering Bradley Barnett Randell Betterly Tatsuya Hirazawa Advisor : Dr. Paris Wiley Why Wireless Charging? Clip art from
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SLIDE 3
Responsibilities
Brad Barnett
- DC / AC Oscillator
- Power Amplifier
- Coil Design
Randell Betterly
- Power Amplifier
- Case Construction
- Coil Design
Tatsuya Hirazawa
- Voltage Regulator
- AC / DC rectifier
- Coil Design
The Wireless Cell Phone Charger
SLIDE 4
Block Diagram
The Wireless Cell Phone Charger
SLIDE 5
Theory
Faraday's Law of Induction Ampere's Circuital Law
The Wireless Cell Phone Charger
SLIDE 6
Resolved Issues
The Wireless Cell Phone Charger
Problem Solution Inductive Coupling:
- Turns Ratio
- Turns #
- Efficiency
- 1:1 Turns ratio
- Large turns #
- Coils as close as possible
Frequency Selection
- Low enough for breadboard
tests and negligible parasitic effects
- High enough for small part
sizes Converting frequency from 60 Hz to selected frequency AC / DC converter in series with DC / AC converter
SLIDE 7
Unresolved Issues
- Need for a power amplifier?
○ Possibly faster charging ○ More expensive
- Efficiency of entire circuit
The Wireless Cell Phone Charger
SLIDE 8
Timeline
The Wireless Cell Phone Charger
SLIDE 9