Lg Electronics Inc.

Hyunwook Moon

Seungbok Ok

Yangkyeong Kim

Euisung Kim

Dooyong Oh

Byungkyu Park

Eui Sung Kim

Byeongwook Park

Jaewoo Lee

Hyeunsik Nam

Byeong Wook Park

Wan Soo Kim

Jaekyung Yang

Hoonbong Lee

Yanghwan Kim

Koonseok Lee

Wansoo Kim

Sunghun Sim

Wonchul Choi

Heungsik Choi

Hojae Seong

Jae-woo Lee

Daegeun Seo

Oksun Yu

Jinseong Hwang

Jinyul Hu

Munseok Seo

Hojae Sung

Rina Hwang

An induction heating and wireless power transmitting apparatus includes: a first working coil portion including first and second working coils that are connected in parallel; a first inverter configured to apply a resonant current to the first working coil and the second working coil by performing a switching operation; a first semiconductor switch connected to the first working coil and configured to turn the first working coil on or off; a second semiconduction switch connected to the second working coil and configured to turn the second working coil on or off; and a controller configured to detect whether an object is positioned above the first working coil or the second working coil based on controlling the first and second semiconductor switched and the first inverter.

Induction heating and wireless power transmitting apparatus having control algorithm

A wireless power transmission apparatus for induction heating includes: a working coil configured to change operation based on selection of a mode of operation from among a plurality of operating modes, the plurality of operating modes including a wireless power transmission mode configured to wirelessly transmit power and a heating mode configured to heat one or more objects, an inverter configured to output, to the working coil, current at an operation frequency, and a controller. The controller is configured to receive, in the wireless power transmission mode, a load voltage from a target object, compensate for the load voltage, and determine, in the wireless power transmission mode, whether a foreign object is present in the working coil based on the compensated load voltage.

Wireless power transmission apparatus for induction heating and control method thereof

A cooking apparatus includes an upper plate configured to support a cooking vessel, a heating module that is movably disposed in a space under the upper plate and that includes a coil, a substrate that is disposed between the upper plate and the heating module and that includes a plurality of coil patterns, an inverter configured to supply a resonance current to each of the plurality of coil patterns, and a controller configured to control the heating module, the substrate, and the inverter. The controller determines a position of the cooking vessel on the upper plate based on the number or a frequency of pulses of resonance current supplied to each of the plurality of coil patterns. The cooking apparatus recognizes the position of the cooking vessel disposed on the cooking apparatus and moves the heating module to the recognized position.

Cooking apparatus

The present disclosure relates to a cooking apparatus having a heating module capable of moving in a two-dimensional space and, particularly, to a cooking apparatus comprising: an upper plate configured to support a cooking vessel, a heating module disposed movably in a space provided under the upper plate and included a coil, and a rail disposed under the heating module to guide movements of the heating module, wherein electric current is supplied to the rail and the heating module supplies an alternating current through the rail. According to the present disclosure, the heating module supplies a current through the rail rather than receiving a current through a separate connection coil or wiring from an external power supply, thereby enabling shorting or disconnection of a current to be prevented even if the heating module moves.

A wireless power transmission apparatus for induction heating includes: a working coil that is configured to change operation based on selection of a mode of operation from among a plurality of operating modes, the plurality of operating modes including a wireless power transmission mode configured to wirelessly transmit power and a heating mode configured to heat one or more objects, an inverter that is configured to output, to the working coil, current at an operation frequency, and a controller. The controller is configured to calculate an eccentricity degree between the working coil and a reception coil of a target object and control, in the wireless power transmission mode, the operation frequency based on the calculated eccentricity degree in a preparation period prior to wireless power transmission to the target object.

A wireless power transmission apparatus for induction heating includes: a working coil that is configured to change operation based on selection of a mode of operation from among a plurality of operating modes, the plurality of operating modes including a wireless power transmission mode configured to wirelessly transmit power and a heating mode configured to heat one or more objects, an inverter that is configured to output, to the working coil, current at an operation frequency, and a controller. The controller is configured to detect a target object, and determine, in the wireless power transmission mode, whether the target object is (i) a device from among a first group of devices including a device with a reception coil or (ii) an induction heating device.

The apparatus comprises a case, a magnetic member which is provided at a bottom surface of the case and attaches the case to the outer surface of the cooking vessel by forming an attractive force with respect to the outer surface of the cooking vessel, first and second temperature sensors which are disposed at the bottom surface of the case while being spaced a predetermined distance apart from each other in the vertical direction, and measure temperatures of two measurement points located at the outer surface of the cooking vessel and spaced the predetermined distance apart from each other in the vertical direction, respectively and a controller which is provided in the case and estimates the temperature of the food based on an average value of the temperatures measured respectively by the first and second temperature sensors and a desired temperature value provided by a user.

Apparatus for estimating temperature of food

A smart kettle is disclosed. The smart kettle includes a body that is configured to increase in temperature in response to a magnetic field. The smart kettle further includes a temperature sensor that is located on a bottom of the body and that is configured to measure a temperature of the bottom of the body. The smart kettle further includes a controller that is configured to adjust a strength of the magnetic field based on the temperature measured by the temperature sensor by outputting a control signal.

Smart kettle using induction heating

A wireless power transmission apparatus includes: a transmission coil configured to transmit power to a wireless power reception apparatus, an inverter that includes a plurality of switching elements and that is configured to output a current of a predetermined frequency to the transmission coil through an operation of the plurality of switching elements, and a controller. The controller can be configured to calculate an output level of power transmitted through the transmission coil, determine a load state of the wireless power reception apparatus based on a target level of power transmitted through the transmission coil and the calculated output level, and control the inverter based on the determined load state of the wireless power reception apparatus.

Wireless power transmission apparatus and method of operating the same

A wireless induction heating cooker includes a main body, a lid coupled to the main body, an internal pot stored in the main body, a first power receiving coil placed at a lower portion of an edge area of the internal pot, a lateral surface heating coil placed on an outer circumferential surface of the internal pot and connected with the first power receiving coil, a power transmitting coil provided on one lateral surface of an upper portion of the main body and supplied with electric currents induced to the first power receiving coil, and a second power receiving coil provided on one lateral surface of the lid and supplying electric currents induced by a magnetic field generated in the power transmitting coil to at least one of electronic devices.

Wireless induction heating cooker and wireless induction heating system including same

A cooking apparatus includes: a working coil, an inverter configured to output a resonant current to the working coil, a current detector configured to detect the resonant current and output a detection value corresponding to the resonant current, and a controller. The controller is configured to control the inverter to flow a first resonant current through the working coil, control the inverter to flow, through the working coil, a second resonant current having a frequency different from the first resonant current, and determine, based on a difference between a first detection value for the first resonant current and a second detection value for the second resonant current, whether a target object that is located adjacent to the working coil is a predetermined object.

Cooking apparatus and method thereof

A cooking apparatus includes: a receiving coil configured to receive power wirelessly, a first rectifier configured to rectify power transmitted from the receiving coil, a first DC capacitor connected to an output terminal of the first rectifier, a working coil, an inverter, a second DC capacitor connected to an input terminal of the inverter, and a filter circuit connected between the first DC capacitor and the second DC capacitor and configured to block a noise current that flows between the first DC capacitor and the second DC capacitor and that is associated with a predetermined frequency or a frequency higher than the predetermined frequency. The inverter is configured to convert power from the second DC capacitor into an alternating current and transmit the converted alternating current to the working coil.

Cooking apparatus and cooking system including the same

An induction heating and wireless power transferring device that includes: a first working coil and a second working coil that are coupled in parallel; a rectification unit configured to rectify alternating current (AC) power to direct current (DC) power; a first inverter unit configured to convert the DC power into resonant current, and apply the converted resonant current to the first working coil or the second working coil; a first switch coupled to the first working coil and configured to turn on or off the first working coil; a second switch coupled to the second working coil and configured to turn on or off the second working coil; and a control unit configured to control the first inverter unit, the first switch, or the second switch to detect whether a target object is located on the first working coil or the second working coil.

Induction heating and wireless power transferring device having improved target object detection algorithm

An induction heating and wireless power transmitting apparatus includes a first group of working coils including a first working coil and a second working coil connected to each other in parallel, a first inverter that supplies resonant currents to at least one of the first working coil or the second working coil by performing a switching operation, a first semiconductor switch connected to the first working coil configured to turn on and turn off the first working coil, a second semiconductor switch connected to the second working coil and configured to turn on and turn off the second working coil, an auxiliary power supply configured to supply power to the first semiconductor switch and the second semiconductor switch, and a controller that controls the first inverter, the first semiconductor switch, and the second semiconductor switches.

Growing community of inventors

Seoul, South Korea

Hyunwook Moon