Lg Electronics Inc.

Seungbok Ok

Dooyong Oh

Hyunwook Moon

Byeong Wook Park

Jae-woo Lee

Byeongwook Park

Byungkyu Park

Oksun Yu

Seongjun Kim

Eui Sung Kim

Euisung Kim

Wongyu Park

Kyung Hoon Jung

Kyunghoon Jung

Hojae Seong

Kyung Koon Jung

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

An induction heating device includes a working coil and a resonance capacitor, an inverter that performs a switching operation to supply a resonance current to the working coil, a plurality of snubber capacitors electrically connected to the inverter, a direct current (DC) link capacitor electrically connected to the inverter, and a relay configured to electrically connect one of the plurality of snubber capacitors to the DC link capacitor or the resonance.

Induction heating device with improved interference noise elimination and output control functions

An induction heating device includes a working coil group including a first working coil and a second working coil that are electrically connected in parallel to each other, an inverter configured to perform a switching operation to supply resonance current to at least one of the first or second working coil; a first semiconductor switch electrically connected to the first working coil to turn on and turn off the first working coil; a second semiconductor switch electrically connected to the second working coil to turn on and turn off the second working coil; and a controller configured to control operation of the inverter and the first and second semiconductor switches, respectively. The controller turns off the inverter before turning off at least one of the first semiconductor switch or the second semiconductor switch.

Induction heating device with improved control algorithm

A cooking apparatus includes: a working coil, an inverter including a plurality of switching elements and configured to apply, by operating the plurality of switching elements, a resonant current of a predetermined frequency to the working coil, a phase detector configured to detect a phase difference between the resonant current and a voltage applied to an output terminal of the inverter, and a controller configured to calculate, based on the detected phase difference, a temperature of a target object that is placed above the working coil.

Cooking apparatus capable of detecting temperature of object to be heated

Disclosed herein is an induction-heating cooking apparatus that includes a sensing circuit for controlling an output of a heating coil, and more specifically, to an induction-heating cooking apparatus capable of enhancing accuracy in measuring electric currents of a heating coil by simply modifying a circuit. The induction-heating cooking apparatus includes a control unit calculating an output of a heating coil on the basis of electric currents measured by a sensor supplying alternating current power.

Induction-heating cooking apparatus

An induction heating device includes a working coil and a resonance capacitor, an inverter that performs a switching operation to supply a resonance current to the working coil, a plurality of snubber capacitors electrically connected to the inverter, a direct current (DC) link capacitor electrically connected to the inverter, and a relay configured to electrically connect one of the plurality of snubber capacitors to the DC link capacitor or the resonance capacitor.

An induction heating device includes a case, working coils, a cover plate, an input interface, a first control module configured to detect one or more of the working coils at a position of an object seated on the cover plate, a second control module configured to receive information on the position of the object and control the input interface to display an image of a heating zone, and light emitting elements disposed below a periphery of each of the plurality of working coils. The second control module is configured to analyze an arrangement form of the one or more of the working coils based on the information on the position of the object, and control driving of at least one of the light emitting elements based on a result of analyzing the arrangement form.

Induction heating device having improved user experience and user interface

An induction heating apparatus includes a working coil; an inverter configured to perform switching operation to thereby apply a resonance current to the working coil; and a controller configured to provide a control signal with a fixed frequency to the inverter to thereby control the switching operation. The controller changes a pulse width of the control signal based on a predetermined cycle that is set based on a temperature of the inverter.

Induction heating apparatus having improved interference noise cancellation and output control functions

An induction heating device includes a case, a working coil, a cover plate, a luminous element, a light guide disposed around the working coil, an input interface that is flush with an upper surface of the cover plate, a first controller configured to control driving of the working coil and the luminous element and to detect a position of one or more objects disposed on the upper surface and an arrangement sequence of the one or more objects placed on the upper surface, and a second controller configured to receive, from the first controller, information on the position and the arrangement sequence of the one or more objects, and control the input interface to display an image corresponding to a heating zone for the one or more objects based on the information on the position and the arrangement sequence of the one or more objects.

Induction heating device with improved function for distinguishing object

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.

Induction heating and wireless power transmitting apparatus having improved circuit structure

An induction heating device includes a first resonance circuit comprising a first working coil and a first resonance capacitor, a first inverter electrically connected to the first resonance circuit and configured to perform a first switching operation to thereby apply a first resonance current to the first working coil, a first group of snubber capacitors that are configured to be electrically connected to the first inverter, the first group of snubber capacitors comprising a first snubber capacitor and a second snubber capacitor, and a first relay configured to selectively connect the first group of snubber capacitors to the first inverter.

Induction heating device having improved interference noise removal function and power control function

An induction heating device includes first and second working coils connected electrically in parallel, an inverter unit configured to switch at least one of the first working coil or the second working coil, an inverter driving unit connected to the inverter unit; a first semiconductor switch connected to the first working coil, a first semiconductor switch driving unit connected to the first semiconductor switch, an over-current protection unit connected to the first semiconductor switch, configured to generate information based on a current that flows in the first semiconductor switch, and configured to, based on the information, determine whether to turn off the inverter driving unit, and a control unit that is configured to receive the information, and determine, based on the information, whether to block a pulse signal to the inverter driving unit and whether to turn off the first semiconductor switch driving unit.

Induction heating device having improved switch stress reduction structure

Disclosed is a device configured to inductively heat one or more objects and to wirelessly transfer power to one or more objects. The device includes a first working coil, an inverter unit configured to cause a resonant current to flow in the first working coil by performing a switching operation, a first detection unit connected to the first working coil and configured to detect the resonant current applied to the first working coil, and a control unit configured to: determine whether a target object is located at a location corresponding to the first working coil by controlling operation of the inverter unit and the first detection unit; or to control output of the first working coil.

Induction heating and wireless power transferring device having improved resonant current detection accuracy

An electronic induction heat cooking apparatus includes a rectifier for rectifying an input voltage and outputting a direct current (DC) voltage; a plurality of switching elements for switching the DC voltage output through the rectifier; a plurality of heating coils for heating a cooking utensil by controlling the plurality of switching elements; a controller for controlling the plurality of switching elements according to a plurality of operation modes; and a supporting member in which at least one of the plurality of heating coils is mounted. The supporting member includes a coil insertion part, into which the heating coils are inserted, and the magnetic member is inserted into the supporting member to directly face the heating coils at the lower side of the heating coils.

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Seoul, South Korea

Seungbok Ok