Analysis of Low-eddy Current WPT Applied in Underground Coal Mines

When Wireless Power Transfer is applied in underground coal mines, the metal explosion-proof shell of mining electrical equipment will produce eddy current, which significantly reduces transmission efficiency. In this paper, a Wireless Power Transfer model applied to mining electrical equipment with low-eddy current is proposed by using laser technology to cut the joints on the metal explosion-proof shell and rationally place the magnetic focusing material. The proposed shell cut by laser technology has less eddy current and can regulate the flux well. It helps to avoid the constraints of the explosion-proof metal shell on the near-field resonance and inductive coupling, and makes the power supply of the equipment under the mine more convenient and safe.