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US 12,660,049 B2Granted
Induction heating apparatus and method for controlling the same
AssigneeLG Electronics Inc.
InventorsGwangrok Kim, Jung Youn Lee
Life of this patent
Estimating the term…
Abstract
An induction heating apparatus may determine a required power value of a heating zone, based on a power level set for the heating zone, detect a container by using an inner working coil and an outer working coil, determine a working coil to be driven, based on results of the detection of the container, determine a driving mode of the working coil to be driven, based on the required power value, and provide a control signal, based on the driving mode.
Claims8
An induction heating apparatus, comprising:
- an inner working coil disposed to correspond to a heating zone;
- an outer working coil disposed to surround an outer surface of the inner working coil;
- an inverter circuit configured to provide current for driving at least one of the inner working coil or the outer working coil, and including a plurality of switching elements;
- a driving circuit configured to provide a switching signal to each of the switching elements;
- a controller configured to:
- determine a required power value of the heating zone, based on a power level set for the heating zone,
- detect a container by using the inner working coil and by using the outer working coil,
- determine at least one of the inner working coil or the outer working coil to be driven, based on at least one result of the detection of the container,
- determine a driving mode of the at least one of the inner working coil or the outer working coil to be driven as one of a half bridge mode or a full bridge mode, based on the required power value, and
- provide, to the driving circuit, a control signal for providing the switching signal, based on the determined driving mode,
- wherein the plurality of switching elements of the inverter circuit comprises:
- a first switching element and a second switching element connected to each other in series;
- a third switching element and a fourth switching element connected to each other in series, and connected to the first switching element and the second switching element in parallel;
- and
- a fifth switching element and a sixth switching element connected to each other in series, and connected to the third switching element and the fourth switching element in parallel,
- wherein the inner working coil is connected to a connection point between the first switching element and the second switching element and is connected to a connection point between the third switching element and the fourth switching element, and the outer working coil is connected to the connection point between the third switching element and the fourth switching element and is connected to a connection point between the fifth switching element and the sixth switching element, and
- wherein when the determined driving mode is the half bridge mode, the first switching element and the second switching element are alternately turned on and turned off, and the fourth switching element is maintained on, and when the determined driving mode is the half bridge mode, the fifth switching element and the sixth switching element are alternately turned on and turned off, and the fourth switching element is maintained on.
14 more elements
An induction heating apparatus, comprising:
- an inner working coil;
- an outer working coil disposed to surround an outer surface of the inner working coil, and a heating zone is to correspond to a center of the inner working coil which correspond to a center of the outer working coil;
- an inverter circuit configured to provide current for driving the inner working coil and the outer working coil, and including a plurality of switching elements;
- a controller configured to:
- detect a container at the heating zone by using the inner working coil;
- detect a container at the heating zone by using the outer working coil,
- determine at least one of the inner working coil or the outer working coil to be driven, based on at least one result of the detection of the container by using the inner working coil and the detection of the container by using the outer working coil,
- determine a driving mode of the at least one of the inner working coil or the outer working coil to be driven as one of a half bridge mode or a full bridge mode, based on a set power level, and
- provide switching signals to the inverter circuit, based on the determined driving mode,
- wherein the plurality of switching elements of the inverter circuit comprises:
- a first switching element and a second switching element connected to each other in series;
- a third switching element and a fourth switching element connected to each other in series, and connected to the first switching element and the second switching element in parallel;
- and
- a fifth switching element and a sixth switching element connected to each other in series, and connected to the third switching element and the fourth switching element in parallel,
- wherein the inner working coil is connected to a connection point between the first switching element and the second switching element and is connected to a connection point between the third switching element and the fourth switching element, and the outer working coil is connected to the connection point between the third switching element and the fourth switching element and is connected to a connection point between the fifth switching element and the sixth switching element, and
- wherein when the determined driving mode is the half bridge mode, the first switching element and the second switching element are alternately turned on and turned off, and the fourth switching element is maintained on, and when the determined driving mode is the half bridge mode, the fifth switching element and the sixth switching element are alternately turned on and turned off, and the fourth switching element is maintained on.
13 more elements
Dependencies are inferred from the claim text.