Background: As wireless energy transmission technology matures, the demand for energy directional transmission is increasing.
Objective: Transfer energy in the specified direction and increase transmission power.
Method: A novel three-coil transmitting structure is proposed, which can transmit energy to a specified single or multiple space regions, and enhance the magnetic field strength in a single direction by magnetic field vector synthesis to improve the transmission power.
Results: Combined with Mathcad numerical calculation and Maxwell simulation analysis, the experimental platform was built and the magnetic focusing of the proposed novel structure was experimentally verified.
Conclusion: The novel emission structure can effectively perform directional energy transmission and increase the transmission power by 2~3 times in a single direction at the cost of 10%~15% efficiency loss.