Abstract:
An apparatus and a method for are provided for a wireless power receiver. The method includes receiving power from a wireless power transmitter; converting the power in an alternating current (AC) form into a direct current (DC) form and providing the converted power to a battery of the electronic device; measuring a temperature of a point in the wireless power receiver during reception of the wireless power; maintaining an amount of the converted power at a first level if the temperature is lower than a first temperature; decreasing the amount of the converted power to a second level which is lower than the first level if the amount of the converted power is at the first level and the temperature is higher than or equal to the first temperature; stopping providing the converted power to the battery if the temperature is higher than a second temperature; and transmitting, to the wireless power transmitter, a signal including status information of the wireless power receiver device and control information to control the wireless power transmitter.
Abstract:
An apparatus and a method for protecting a wireless power receiver from excessive temperature caused by charging are provided. The apparatus includes a power receiver configured to receive wireless power in an alternate current (AC) form from a wireless power transmitter; a temperature measurement unit configured to measure a temperature of a point in the wireless power receiver during reception of the wireless power; and a controller configured to decrease a charging power corresponding to the wireless power, if a temperature measured by the temperature measurement unit exceeds a preset temperature, and to provide the charging power to a battery, if the temperature measured by the temperature measurement unit is lower than the preset temperature.
Abstract:
A wireless power transmission device is provided. The wireless power transmission device includes a resonance signal generator and a controller. The resonance signal generator is configured to transmit wireless power to a wireless power reception device. The controller is configured to adjust the wireless power transmitted to the wireless power reception device, when a predetermined condition caused by over-voltage protection operation at the wireless power reception device is detected.
Abstract:
An integrated circuit for wireless charging and a wireless charging method in an integrated circuit are provided. The integrated circuit includes a first wireless communication unit configured to support a first wireless communication method; a second wireless communication unit configured to support a second wireless communication method; a first route selection unit configured to perform a selection from among a first power input according to wired charging and a second power input according to wireless charging to be allowed as input; a second route selection unit configured to perform a selection from among a power between a third power input from a battery and a fourth power input according to wireless charging to be allowed as input; a power block configured to receive the power from any the first and second route selection units; and a controller configured to control an operation of the first and second route selection units.
Abstract:
Methods and apparatus are provided for detecting a non-intended object of power reception by a power transmitter. Power transmission for communication is performed, when the load change is sensed that has a value greater than or equal to a predetermined threshold. It is determined whether a subscription request, for subscribing to a network is received within a predetermined time period. The power transmission for communication is stopped when the subscription request is not received within the predetermined time period. Power is transmitted to a power receiver that has transmitted the subscription request, when the subscription request is received within the predetermined time period. It is determined whether a leakage power value exceeds an allowable range, when the power state report is received from the power receiver. The transmission of the power to the power receiver is stopped, when the leakage power value exceeds the allowable range.
Abstract:
An apparatus and a method for are provided for a wireless power receiver. The method includes receiving power from a wireless power transmitter; converting the power in an alternating current (AC) form into a direct current (DC) form and providing the converted power to a battery of the electronic device; measuring a temperature of a point in the wireless power receiver during reception of the wireless power; maintaining an amount of the converted power at a first level if the temperature is lower than a first temperature; decreasing the amount of the converted power to a second level which is lower than the first level if the amount of the converted power is at the first level and the temperature is higher than or equal to the first temperature; stopping providing the converted power to the battery if the temperature is higher than a second temperature; and transmitting, to the wireless power transmitter, a signal including status information of the wireless power receiver device and control information to control the wireless power transmitter.
Abstract:
A wireless power receiver for wirelessly receiving power from a wireless power transmitter comprises: a power reception circuit receiving electromagnetic waves emitted from the wireless power receiver so as to output power having an alternating current waveform; a rectifier for rectifying the power, having an AC waveform, outputted from the power reception circuit into power having a direct current waveform; a DC/DC converter for converting, into a voltage of a preset level, a voltage of the power having a direct current waveform, the power being rectified by the rectifier; a charger for charging a battery by using the power having a DC waveform, converted from the DC/DC converter; an alternating current ground connected to the power reception circuit and/or the rectifier so as to receive at least a portion of the power having an alternating current waveform; and a direct current ground connected to the DC/DC converter and/or the charger so as to receive at least a portion of the power having a direct current waveform, wherein the alternating current ground and the direct current ground can be disposed on different PCB layers, respectively.
Abstract:
A method and power transmitter for efficiently controlling power transmission to one or more power receivers in a wireless multi-power transmission system are provided. The method includes performing, when a predetermined measurement cycle arrives, a load measurement; comparing a current load measurement value with a previous load measurement value; determining whether the current load measurement value is increased over the previous load measurement value by at least as much as a first predetermined threshold; gradually increasing, when the load measurement value is increased over the previous load measurement value by at least as much as the first threshold, a transmission power value until a request for a subscription to a wireless multi-power transmission network from a power reception target within a predetermined time limit; and stopping, when the request for the subscription is not received before the time limit is exceeded, power transmission to the power reception target.
Abstract:
A method and power transmitter for efficiently controlling power transmission to one or more power receivers in a wireless multi-power transmission system are provided. The method includes performing, when a predetermined measurement cycle arrives, a load measurement; comparing a current load measurement value with a previous load measurement value; determining whether the current load measurement value is increased over the previous load measurement value by at least as much as a first predetermined threshold; gradually increasing, when the load measurement value is increased over the previous load measurement value by at least as much as the first threshold, a transmission power value until a request for a subscription to a wireless multi-power transmission network from a power reception target within a predetermined time limit; and stopping, when the request for the subscription is not received before the time limit is exceeded, power transmission to the power reception target.
Abstract:
A method and power transmitter for efficiently controlling power transmission to one or more power receivers in a wireless multi-power transmission system are provided. The method includes performing, when a predetermined measurement cycle arrives, a load measurement; comparing a current load measurement value with a previous load measurement value; determining whether the current load measurement value is increased over the previous load measurement value by at least as much as a first predetermined threshold; gradually increasing, when the load measurement value is increased over the previous load measurement value by at least as much as the first threshold, a transmission power value until a request for a subscription to a wireless multi-power transmission network from a power reception target within a predetermined time limit; and stopping, when the request for the subscription is not received before the time limit is exceeded, power transmission to the power reception target.