Wireless power transfer via partially magnetized pavement

Design concept of partially magnetized pavement layer​

Invention Summary:

Lack of access to charging infrastructure and longer charging time have limited electric vehicle (EV) adoption. One promising solution is to utilize inductively coupled power transfer (ICPT)-based wireless charging modules embedded in the pavement for dynamic charging. However, power transfer efficiency can be greatly affected by the distance between the transmitter and receiver coil and frequency mismatch due to pavement construction.

Rutgers researchers have designed a partially magnetized pavement to improve the wireless power transfer (WPT) efficiency. This is accomplished by creating a magnetized pathway through the pavement layer (to increase the efficiency of inductive power transfer). The design principle creates a pathway that can better guide magnetic flux and connect magnetic fields between transmitter and receiver coils. For quantifying technical benefits and economic feasibility, the WPT efficiency of partially magnetized pavement and conventional pavement was analyzed using numerical simulation of WPT system in the pavement. The wireless charging efficiency is higher with magnetized pavement as compared to conventional pavement for transmitter coils embedded at 0.1, 0.2, 03, and 0.4 m below the pavement surface.  The estimated electricity cost saving for one-mile partially magnetized pavement section can be ranged from $0.2–14 million, depending on the specific efficiency improvement and the daily charging hours of WPT system.


  • Increased power transfer efficiency
  • High electricity cost saving was brought with limited amount of magnetic materials used
  • Pathway that better guides magnetic flux and connects magnetic fields

Market Applications:

  • Wireless charging of EV’s while moving
  • Wireless charging of EV’s while docked
  • Wireless charging of logistic EV’s while working

Intellectual Property & Development Status: Patent pending. Available for licensing and/or research collaboration. For any business development and other collaborative partnerships contact marketingbd@research.rutgers.edu

Publication: Guo and Wang 2022.

Patent Information:
Lisa Lyu
Assistant Director
Rutgers, The State University of New Jersey