| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that when a radio communication function is mounted in a station in conventional manner, it is brought to an increase in the price equivalent to the radio communication function. SOLUTION: The invention is directed to provide a method for carrying out all the operation of starting or ending the power transmission from a cradle, or starting or ending the charging of a portable terminal in the wireless charging system composed of a cradle and portable terminal by mechanically or electrically. The confirmation of the ending of charging of the portable terminal is especially performed by detecting that the value of transmission current flowing into the power transmission coil of a transmission device of the cradle is returned to the initial transmission current value. |
