Transmitter for wireless charging power transmission, and method and system for connection between internet of things system and wireless charging receiver

A transmitter for wireless charging power transmission, comprising:

• a transmitter-side power convertor converting a first Alternating Current (AC) signal to a second AC signal for power conversion;
• a transmitter-side resonant circuit generating a magnetic field based on the second AC signal, converted by the transmitter-side power convertor, to provide power to a receiver located within a charging area;
• and
• a transmitter-side processor controlling the power conversion of the transmitter-side power convertor and performing impedance matching between the transmitter-side resonant circuit and receiver, wherein the transmitter-side processor is configured to:
• detect an object by transmitting a short beacon signal periodically,
• transmit a long beacon signal for driving the object,
• recognize the object as the receiver by receiving from the object a response signal which has been transmitted in response to reception of the long beacon signal,
• transmit a connection request signal to the receiver,
• exchange parameter information with the receiver which has received the connection request signal, wherein the parameter information includes:
• charging authentication information for authenticating the receiver to establish wireless charging connection between the receiver and the transmitter, and an IoT authentication information for authenticating the receiver to join an IoT system,
• establish a connection to the receiver for wireless charging power transmission based on the charging authentication information included in the parameter information received from the receiver,
• transmit to the IoT authentication information of the receiver included in the parameter information to the IoT system so that the transmitter supports the receiver to join the receiver to the IoT system by transmitting the IoT authentication information of the receiver to the IoT system, and
• transmit wireless charging power to the receiver,
• wherein the detecting of the object by transmitting the short beacon signal includes detecting the object by monitoring change in magnetic flux in the charging area, change in capacitance and/or inductance between the object and the transmitter, and/or shift of resonance frequency between the object and the transmitter.

A method for establishing a connection between an IoT system and a wireless charging receiver, comprising:

• detecting, by a transmitter, an object located within a charging area of the transmitter to transmit wireless charging power;
• outputting, by the transmitter, a receiver detection signal;
• receiving, by the transmitter, from the receiver a receiver confirmation signal which is a response signal to the receiver detection signal and recognizing the object as a receiver;
• identifying, by the transmitter, the receiver by receiving, from the receiver, identification information of the receiver including IoT authentication information for authenticating the receiver to join an IoT system and charging authentication information for authenticating the receiver to establish wireless charging connection between the receiver and the transmitter;
• establishing, by the transmitter, the wireless charging connection to the receiver based on the charging authentication information;
• transmitting, by the transmitter, the IoT authentication information of the receiver to a IoT management device so that the transmitter supports the receiver to join the receiver to the IoT system by transmitting the IoT authentication information of the receiver to the IoT system;
• transmitting, by the transmitter, the wireless charging power to the receiver,
• wherein the detecting of the object detects the object by monitoring change in magnetic flux in the charging area, change in capacitance and/or inductance between the object and the transmitter, and/or shift of resonance frequency between the object and the transmitter.