WIRELESS CHARGING SYSTEM AND ITS APPLICATION FOR CHARGING MOBILE AND PORTABLE DEVICES Russian patent published in 2017 - IPC H02J7/00 

FIELD: electricity.

SUBSTANCE: wireless charging system includes a wireless power transmission unit and a wireless power reception unit. The wireless power transmission unit comprises the power source, the transmitting inductance coil, the shielding element and the first impedance matching circuit. The transmitting inductance coil is connected to the power source via the first impedance matching circuit. In the case of power supply by means of the power source, the transmitting inductance coil is capable of emitting electromagnetic radiation. The first impedance matching circuit is made with the possibility to provide impedance matching between the transmitting inductance coil and the power source. The shielding element is located under the transmitting inductance coil and is configured in such a way that the electromagnetic radiation emitted by the transmitting inductance coil is suppressed outside the active charging region. The wireless reception unit includes the receiving inductance coil, the load and the second impedance matching circuit. The receiving inductance coil is made with the possibility to inductively communicate with the transmitting inductance coil, so that the electromagnetic radiation emitted by the transmitting inductance coil induces the charging currents in the receiving inductance coil. The load is connected to the receiving inductance coil through the second impedance matching circuit. The load is made with the possibility to be charged by means of charging currents. The second impedance matching circuit is made with the possibility to ensure matching the optimum impedances between the receiving inductance coil and the load. The first and the second matching circuits are also made with the possibility to ensure the resonance between the transmitting inductance coil and the receiving inductance coil in order to maximize the power transmission efficiency.

EFFECT: increasing the efficiency of energy transmission from the wireless power transmission unit to wireless power reception units embedded in electronic devices by means of suppressing electromagnetic interference via impedance matching circuits and a shielding element.

28 cl, 33 dwg, 1 tbl