Apparatus for transmitting power wirelessly
There are provided an apparatus apparatus for transmitting power wirelessly. The apparatus for transmitting power wirelessly may include a boosting unit boosting an input voltage, and an inverter unit inverting the boosted voltage output from the boosting unit to transmit power wirelessly. The inverter unit and the boosting unit are controlled by the same switching element.
1. An apparatus for transmitting power wirelessly, the apparatus comprising:
a first switch configured to perform an ON switching operation when the input voltage corresponds to a first value, and configured to perform an OFF switching operation when the input voltage corresponds to a second value larger than the first value;
a first path activated by the ON switching operation of the first switch, boosting the input voltage to generate the boosted voltage, and transmitting power wirelessly using the boosted voltage; and
a second path activated by the OFF switching operation of the first switch and transmitting power wirelessly using the input voltage without boosting the input voltage.
2. The apparatus of claim 1 , wherein the first switch performs the ON switching operation when the input voltage corresponds to a first value, and performs the OFF switching operation when the input voltage corresponds to a second value larger the first value.
3. The apparatus of claim 1 , wherein the first path includes:
a boosting circuit boosting the input voltage in response to switching operations of second and third switches to output the boosted voltage; and
an inverter circuit transmitting power wirelessly using the boosted voltage, in response to the switching operations of the second and third switches.
4. The apparatus of claim 3 , wherein the second and third switches are alternately operated at a duty of 50%.
5. The apparatus of claim 3 , wherein the boosting circuit includes:
a first inductor connected to an input power terminal in series;
the second switch connected to one terminal of the first inductor in series;
a capacitor connected to the second switch in series; and
the third switch connected to one terminal of the first inductor in series and connected to the second switch in parallel.
6. The apparatus of claim 3 , wherein the inverter circuit includes:
the second switch;
the third switch; and
a resonance circuit connected to the second switch and the third switch in parallel.