Lg Electronics Inc.

Ho Yong Jang

Donghyun Kim

Namhun Kim

Han Su Jung

Sun Cheol Bae

Ja In Koo

Jea Shik Heo

Byeong Geuk Kang

Sehwa Yoon

Kyelyong Kang

Young Ho Hong

Gwangrok Kim

Yoo Sool Yoon

Jung Youn Lee

Seongkyu Song

Chung Ill Lee

A controller may measure resonance current of a working coil, measure driving voltage of a switching element included in an inverter circuit that supplies current to the working coil, and generates a phase margin pulse based on the resonance current and the driving voltage. The controller may compare the phase margin pulse with a switching signal and determine a driving state of the induction heating apparatus, and control driving of the working coil based on the driving state of the induction heating apparatus. Additionally, when it is determined that a driving frequency of the working coil is included in a capacitive area, the induction heating apparatus stops from operating, or a driving frequency of the working coil is set again.

Induction heating apparatus and method for controlling the same

The present disclosure relates to an induction heating apparatus and a method of controlling the same. A controller of the induction heating apparatus according to the present disclosure may set an operation mode of an inverter circuit to a half bridge mode when a required power value of a working coil is set to a value less than a reference power value such that a driving frequency of the working coil decreases while an actual power value of the working coil is kept the same as the required power value. Additionally, the controller of the induction heating apparatus may adjust a duty ratio of a switching signal input to a switching element included in the inverter circuit, thereby adjusting the actual power value of the working coil.

Induction heating apparatus and method of controlling the same

Disclosed herein is an electric pot having an improved relay installation position. The electric pot includes a pot main body that is provided with a magnetic field generator generating a magnetic field at a lower portion of the pot main body, and a supporter that includes a magnetism detection sensor detecting magnitude of a magnetic field generated by the magnetic field generator and, based on the detected magnitude of a magnetic field, generating a voltage and that includes a comparator comparing the voltage generated by the magnetism detection sensor with a predetermined reference voltage and, based on the comparison, controlling a switchover operation of a relay part, thereby controlling the relay part through a simple circuit configuration and through magnetic field generation and detection means without an additional communication means.

Electric pot having improved relay installation position

An electric pot may include a controller that controls a heater to perform a temperature-maintenance operation based on an input relating to a temperature-maintenance operation and based on information on temperatures. A memory may receive information in relation to a temperature-maintenance operation from the controller and may store the information and retain the stored information in relation to a temperature-maintenance operation regardless of whether a pot main body is attached to or detached from a supporter.

Electric pot having improved function of continuing temperature-maintenance operation

An electric pot may have an improved relay installation position. The electric pot may include a supporter and a pot main body provided with a heater driven to provide heat through an electric connection with connection terminals. The supporter may include a relay part that optionally switches between a connection of the power supply to a third connection terminal and a disconnection of the power supply to the third connection terminal.

The present disclosure relates to an induction heating device and a method for controlling the same. In accordance with the present disclosure, first, inductive sensing is periodically performed to detect a specific object with inductive heating property. Next, current sensing of the specific object having the inductive heating property is performed to again check whether the specific object has the inductive heating property. Thus, when the user simply places the loaded object on the device, the device may allow the user to quickly and intuitively confirm whether the corresponding loaded object has the inductive heating property.

Induction heating device and method for controlling the same

The present disclosure relates to a loaded-object sensor and an induction heating device including the loaded-object sensor. The loaded-object sensor has a cylindrical hollow body with a sensing coil wound on its outer surface. Further, a receiving space formed inside the body of the loaded-object sensor accommodates a temperature sensor. The loaded-object sensor is concentrically provided in a central region of the working coil. The sensor may measure the temperature of the loaded object while discriminating a type of the loaded object placed on a corresponding position to the working coil.

Loaded-object sensor and induction heating device including loaded-object sensor

The present disclosure relates to an induction heating device. A loaded-object sensor according to the present disclosure is arranged concentrically and centrally in the working coil. Thus, the sensing coil and the working coil are adjacent to each other. When a current for the heating operation is applied to the working coil, an induction voltage is generated in the sensing coil by magnetic force generated by the current applied to the working coil. According to the present disclosure, a resistor circuit is used to reduce the induction voltage generated in the sensing coil when the heating operation of the working coil is performed.

Induction heating device

A motor control device of an air conditioner may include: a DC/DC converter that level-changes a DC power supply supplied from the outside to output the level-charged DC power supply to a DC bus terminal; a bidirectional DC/AC converter that converts the DC power supply of the DC bus terminal into an AC power supply to transfer the converted AC power supply to a system, or that converts the AC power supply from the system into the DC/power supply to supply the converted DC power supply to the DC bus terminal; and an inverter that converts the DC power supply of the DC bus terminal into the AC power supply by a switching operation, and drives a compression motor by the converted AC power supply.

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Seoul, South Korea

Ho Yong Jang