| CPC H02J 50/12 (2016.02) [H02J 7/007192 (2020.01); H02J 7/02 (2013.01)] | 11 Claims |
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1. A wireless charger, comprising:
a power source;
a transmission coil configured to generate an electromagnetic field when power is supplied from the power source to cause an electromagnetic induction phenomenon between a reception coil provided in an object requiring power and the transmission coil; and
a filter unit disposed on one side of the transmission coil to be disposed between the transmission coil and the reception coil and including a coil and at least two capacitors for eliminating noise generated between the transmission coil and the reception coil;
wherein the at least two capacitors includes a first capacitor connected to a first end and an intermediate point of the coil, and a second capacitor connected to the first end of the coil and a second end of the coil
wherein the filter unit further includes:
a first switch disposed between the first capacitor and the second end of the coil;
a second switch disposed between the second capacitor and the second end of the coil;
a first temperature detector disposed between the first end of the coil and the first capacitor to detect a temperature of the coil; and
a second temperature detector disposed between the second capacitor and the second switch to detect the temperature of the coil; and
wherein one of the first switch and the second switch is turned on;
a controller configured to:
identify the temperature of the coil detected by the first temperature detector based on the turn-on of the first switch; and
identify the temperature of the coil detected by the second temperature detector based on the turn-on of the second switch.
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