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US 11,387,677 B2Granted
Non-contact power charging system and control method thereof based on foreign substance detection
AssigneeIntel Corporation
InventorChun-Kil Jung
Life of this patent
Estimating the term…
Abstract
A non-contact power charging, in which power transmission can be interrupted when foreign materials are deposited on a charge plate of the non-contact power charging system. A charging operation can be continuously maintained at a stable voltage even if a non-contact power receiving apparatus moves by touching or displacement on the charge plate of the non-contact power charging system in the charging operation. Charging efficiency is improved.
Claims10
A non-contact power transmitting apparatus comprising:
- a primary charge core which generates a magnetic field to wirelessly transmit a power signal to a power receiving apparatus;
- a received signal processing module which processes a signal received from the power receiving apparatus and sends the processed signal to a central control unit, the signal including information on a received power of the power receiving apparatus and a request to lower a level of the power signal if any one of voltage and current measured in the receiving apparatus due to the received power is greater than an upper limit of a predetermined range, and a request to raise a level of the power signal if anyone of voltage and current measured in the receiving apparatus due to the received power is less than a lower limit of the predetermined range;
- a central control unit which interrupts or suspends charging operation of the non-contact power transmitting apparatus if a loss in the power signal is detected due to changes of the magnetic field by a foreign substance, wherein the central control unit determines the loss based on changes in a load on the primary charge core caused by the foreign substance;
- and
- wherein the central control unit is to increase or decrease the level of the power signal in response to the request to maintain a stable power level at the power receiving apparatus during battery charging.
2 more elements
A method of controlling a non-contact power transmission apparatus, the method comprising:
- generating a magnetic field to wirelessly transmit a power signal to a power receiving apparatus;
- processing a signal received from the power receiving apparatus, the signal including information on a received power of the power receiving apparatus and a request to lower a level of the power signal if any one of voltage and current measured in the receiving apparatus due to the received power is greater than an upper limit of a predetermined range, and a request to raise a level of the power signal if anyone of voltage and current measured in the receiving apparatus due to the received power is less than a lower limit of the predetermined range;
- determining whether a loss in the power signal is detected due to changes of the magnetic field by a foreign substance, wherein the determining whether a loss in the power signal is detected is based on changes in a load on the primary charge core caused by the foreign substance;
- increasing or decreasing the level of the power signal in response to the request to maintain a stable power level at the power receiving apparatus during battery charging;
- and
- interrupting or suspending charging operation of the non-contact power transmission apparatus if the loss in the power signal is detected.
3 more elements
Dependencies are inferred from the claim text.