Wireless power supply method and apparatus therefor
AssigneeLG Innotek Co., Ltd.
InventorSu Ho BAE
Life of this patent
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Abstract
The present invention relates to a wireless power supply apparatus comprising: n transmission coil(s) for transmitting a magnetic field; a frequency generation unit for supplying an AC signal having a predetermined operation frequency; n inverter buffer(s) for a transition of the phase of the AC signal, a master control unit for activating or inactivating the inverter buffer(s); n+1 amplifier(s) for amplifying the AC signal; and n+1 gate driver(s) for controlling the amplifier(s) on the basis of the phase of the inputted AC signal.
Claims19
1-15. (canceled)
A wireless power supply apparatus comprising:
- n transmission coils for transmission of a magnetic field;
- a frequency generator configured to supply an AC signal having a predetermined operating frequency;
- n inverter buffers configured to shift a phase of the AC signal;
- a main controller configured to enable or disable the inverter buffers;
- n+1 amplification units configured to amplify the AC signal;
- and
- n+1 gate drivers configured to control the amplification units based on the phase of the AC signal input thereto.
The wireless power supply apparatus according to claim 15, wherein the amplification units comprise at least one metal oxide semiconductor field effect transistor (MOSFET).
The wireless power supply apparatus according to claim 15, wherein a current flowing across the transmission coils is inverted with a periodicity of T/2 period when a periodicity of the AC signal is T.
The wireless power supply apparatus according to claim 15, wherein one end of each of the gate drivers is electrically connected to the inverter buffers, and the other end of each of the gate drivers is electrically connected to the amplification units.
The wireless power supply apparatus according to claim 15, wherein n−2 amplification units among the n amplification units are electrically connected to the two or more of the transmission coils different from each other.
The wireless power supply apparatus according to claim 15, wherein two of the n amplification units are electrically connected to only one of the transmission coils.
The wireless power supply apparatus according to claim 15, wherein the main controller controls the n inverter buffers to select a transmission coil for transmitting the AC signal among the n transmission coils, wherein the AC signal is transmitted through the selected transmission coil electrically connected to inverter buffer activated by the main controller.
A wireless power supply apparatus comprising:
- a plurality of transmission coils for transmission of a magnetic field;
- a frequency generator configured to supply an AC signal having a predetermined operating frequency;
- a plurality of inverter buffers configured to shift a phase of the AC signal;
- a main controller configured to enable or disable the inverter buffers;
- an amplification units comprising a plurality of amplifiers to amplify the AC signal;
- and
- a plurality of gate drivers configured to control the amplification units based on the phase of the AC signal input thereto,
- wherein at least one of the plurality of amplifiers is electrically connected to at least two transmission coils.
A wireless power supply apparatus comprising:
- first to third transmission coils for transmission of a magnetic field;
- a frequency generator configured to supply an AC signal having a predetermined operating frequency;
- first to third inverter buffers configured to shift a phase of the AC signal;
- a main controller configured to enable or disable the inverter buffers;
- an amplification units comprising first to fourth amplifiers to amplify the AC signal;
- and
- first to fourth gate drivers configured to control the amplification units based on the phase of the AC signal input thereto,
- wherein at least one of the first to fourth amplifiers is electrically connected to at least two transmission coils.
Dependencies are inferred from the claim text.