Invention Description
Inductive power transfer (IPT) provides safe, wireless power but requires dedicated communication for real-time control. Because traditional wireless methods, including Bluetooth and Wi-Fi, cause unacceptable delays, researchers have designed specialized transfer alternatives. These include inductive methods, which are complex or bulky, and capacitive coupling, which risks signal interference at high power levels.
Researchers at Arizona State University have developed an innovative system utilizing ultrathin nanocrystalline laminated sheets to enhance inductive coupling for wireless power transfer while simultaneously serving as electrodes for capacitive data transfer. By combining the roles of ferrite and metal plates into a single multifunctional sheet, the system achieves a compact form factor without sacrificing performance. A 100-W prototype demonstrated a power transfer efficiency of 97.2% alongside a data rate of 1 Mbps, facilitated by a CLLC resonant converter for bidirectional dc-dc conversion. This design effectively minimizes interference between power and data channels, ensuring reliable and accurate data transmission.
This novel system integrates ultrathin nanocrystalline laminated sheets to enable highly efficient inductive power transfer combined with capacitive data communication all within a conveniently small footprint.
Potential Applications
- Wireless charging systems with integrated data communication for consumer electronics
- Electric vehicle wireless charging stations requiring simultaneous power and control data transfer
- Industrial automation with contactless power and sensor data transfer
- Medical implantable devices needing compact wireless power and data interfaces
- Internet of Things (IoT) devices demanding efficient, compact wireless power and data solutions
Benefits and Advantages
- Multipurposed for both inductive power and capacitive data transfer
- Simultaneous wireless power and data transfer at 1 Mbps with zero-bit errors
- Experimental results demonstrate that the system can achieve high power efficiency over 97% across the 160–360 kHz frequency range at an input power of 100W
- Outperforms similar solutions in terms of power efficiency and data transfer rate
- There is almost no decrease in power efficiency during the concurrent operation
- Compact and simplified system design by integrating multiple functions into NC laminated sheets leading to lower system complexity and cost
- Improved magnetic shielding and inductive coupling performance
- Minimal interference between power and data channels
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