中文版本

Opportunity  

Wireless power transfer has been a significant area of research and development, but existing systems face several limitations. Traditional methods rely on a pair of magnetically coupled coils, which are effective only over short or mid-range distances. In short-range applications (e.g., wireless charging for electric vehicles), the distance between coils is typically less than three times the coil radius, achieving high efficiency (80-95%). However, for mid-range applications, where the distance exceeds three times the coil radius, efficiency drops exponentially (e.g., to 40% at 2.4 meters). This inefficiency limits practical applications, such as powering devices over longer distances or in dynamic environments. Additionally, existing systems lack flexibility in power flow control, making them unsuitable for complex or multi-path power distribution networks. The need for a more efficient, flexible, and scalable wireless power transfer system motivates this invention.  

Technology  

The patent introduces a novel wireless power transfer system using three or more magnetically coupled coils arranged in one or more power flow paths. Unlike traditional two-coil systems, this "domino resonator chain" allows power to be transferred over longer distances by breaking the transmission into shorter, high-efficiency segments. The coils are arranged such that each coil can couple with adjacent coils, enabling power to flow along customizable paths (e.g., straight, curved, or branched). Key innovations include:  

1. Multi-Coil Arrangement: By using multiple coils, the system avoids the exponential efficiency drop seen in two-coil systems, maintaining high efficiency over extended distances.  
2. Flexible Power Flow Control: The system allows dynamic control of power flow by adjusting the orientation of coil planes (varying mutual inductance) or tuning resonant frequencies (varying impedance). For example, rotating a coil plane can divert power to specific branches, while detuning coils can block power flow.  
3. Adaptive Configurations: Coils can be arranged in straight, curved, circular, or irregular paths, and power flow can split or merge across multiple paths. This flexibility is ideal for applications like flexible power cables or multi-device charging networks.  
4. Low-Frequency Operation: The system operates at frequencies below 100 MHz (e.g., 10 kHz–10 MHz), reducing AC resistance and improving efficiency compared to high-frequency waveguides.  

Advantages  

• Extended Range: Maintains high efficiency over longer distances by using intermediate coils.  
• Flexibility: Supports complex power flow paths (e.g., branching, merging) and adaptable configurations (e.g., flexible tubular structures).  
• Efficiency: Optimized coil spacing and low-frequency operation minimize energy loss.  
• Control: Enables real-time power flow adjustment via coil orientation or frequency tuning.  
• Isolation: Electrically isolated power transfer, enhancing safety.  

Applications  

• Wireless Charging: For electric vehicles, industrial robots, or consumer electronics.  
• Medical Devices: Powering implantable or surgical tools without physical connectors.  
• Smart Environments: Dynamic power distribution in smart homes or offices.  
• Flexible Power Cables: Hollow, lightweight cables for isolated power transfer.  
• Microsurgery: Targeting tumors with resonant-frequency power delivery.