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US 8,947,045 B2Granted
Method for controlling power transmission in wireless power transmission apparatus and wireless power transmission apparatus thereof
AssigneeHanrim Postech Co., Ltd.
InventorsChun-Kil Jung, Yoon-Sang Kuk
Life of this patent
Estimating the term…
Abstract
A method for controlling a power transmission in a wireless power transmission apparatus, and a power transmission apparatus thereof. The method includes detecting via an object detecting sensor whether a foreign object is placed on a charging position of the wireless power transmission apparatus during a wireless charging; calculating a power loss of the wireless charging by a controller of the wireless power transmission apparatus if the foreign object is detected by the object detecting sensor; and stopping the wireless charging if the power loss is over a reference value.
Claims13
A method for controlling a power transmission in a wireless power transmission apparatus, the method comprising:
- detecting whether a wireless power receiving apparatus is placed on or near the charging position by measuring a phase change or a current value change for a pulse signal transmitted via a primary core of the wireless power transmission apparatus;
- starting a wireless charging by transmitting a wireless power signal to the wireless power receiving apparatus;
- detecting via an object detecting sensor whether a foreign object is placed on or near a charging position of the wireless power transmission apparatus during the wireless charging;
- calculating a power loss of the wireless charging by a controller of the wireless power transmission apparatus if the foreign object is detected by the object detecting sensor;
- and
- stopping the wireless charging if the power loss is over a reference value,
- wherein the detecting of whether the wireless power receiving apparatus is placed on or near the charging position by measuring the phase change or the current value change for the pulse signal transmitted via the primary core of the wireless power transmission apparatus, comprises:
- transmitting the pulse signal to a first transmission coil and a second transmission coil of the primary core in turns;
- measuring the phase change or the current value change of the pulse signal which is generated in one of the first transmission coil and the second transmission coil;
- and
- detecting whether the wireless power receiving apparatus is placed on one of the first transmission coil and the second transmission coil, based on the phase change or the current value change.
8 more elements
A wireless power transmission apparatus, comprising:
- a primary core to transmit a wireless power signal;
- a transmission controller detects whether a wireless power receiving apparatus is placed on the charging position by measuring a phase change or a current value change for a pulse signal transmitted via the primary core of the wireless power transmission apparatus, and to start a wireless charging by transmitting a wireless power signal if the wireless power receiving apparatus is placed on or near the charging position;
- and
- an object detecting sensor to detect a foreign object during the wireless charging;
- and
- wherein the transmission controller to calculate a power loss of the wireless charging if the foreign object is detected by the object detecting sensor during the wireless charging, and to stop the wireless charging if the power loss is over a reference value,
- wherein:
- the primary core comprises a first transmission coil and a second transmission coil;
- and
- the transmission controller transmits the pulse signal to the first transmission coil and the second transmission coil of the primary core in turns, to measure the phase change or the current value change of the pulse signal which is generated in one of the first transmission coil and the second transmission coil, and detect that the wireless power receiving apparatus is placed on one of the first transmission coil and the second transmission coil, based on the phase change or the current value change.
7 more elements
A wireless power transmission system comprising:
- a wireless power transmission apparatus comprising:
- a primary core to transmit a wireless power during wireless charging,
- a transmission controller detects whether a wireless power receiving apparatus is placed on the charging position by measuring a phase change or a current value change for a pulse signal transmitted via the primary core of the wireless power transmission apparatus, and to start a wireless charging by transmitting a wireless power signal if the wireless power receiving apparatus is placed on or near the charging position,
- an object detecting sensor to detect a foreign object during the wireless charging,
- wherein the transmission controller to calculate a power loss of the wireless charging if the foreign object is detected during the wireless charging, and to alter the wireless charging if the power loss is over a reference value,
- wherein the primary core comprises a first transmission coil and a second transmission coil, and
- wherein the transmission controller transmits the pulse signal to the first transmission coil and the second transmission coil of the primary core in turns, to measure the phase change or the current value change of the pulse signal which is generated in one of the first transmission coil and the second transmission coil, and detect that the wireless power receiving apparatus is placed on one of the first transmission coil and the second transmission coil, based on the phase change or the current value change;
- and
- the wireless power receiving apparatus which receives the wireless power from the primary core.
6 more elements
Dependencies are inferred from the claim text.