So….What’s All This Wireless Power Transfer Stuff About Anyway?? IEEE HOLM Conference John Yurtin 10/14/2014 History of Wireless Power Nicola Tesla Cordless Toothbrush Common Commercial Application of Wireless Power Two Main Automotive Applications Phone and Tablet Hybrid/Electric Vehicle Charging Charging 5-15 Watts 4 Kilowatts Inductive and Resonant Technology Typical Inductive Phone Charge Pad • Phone must be placed directly on the pad • Orientation is critical to charging • Phone must have a capture coil (embedded, or as a sleeve) • 5W at 50% efficiency 6 Resonant Technology Repeater coils Powered Source Coil Non-Powered Repeater Coils Capture Coil 8 Demonstration 9 Wireless Power Transfer Basic System POWER e re c v Source Matching ru ie Matching Rectification Drive Network oS ce Network D R E V V Communication E I Input Power Control and H Voltage C Conditioning Communication Control Conditioning I E C L L E LIN/CAN O A D 10