Patent ID: 7075044

Claim:
An induction-heating cooking apparatus, operation of which is interrupted by container eccentricity comprising: a power-supply unit for rectifying/filtering an AC power-supply signal, and providing a circuit of the induction-heating cooking apparatus with a power-supply signal; an inverter unit for performing a switching operation upon receiving an input signal from the power-supply unit, and transmitting a current signal to a coil on which a cooking container is seated; a constant-output controller for generating a pulse-width control signal to vary a width of a driving pulse applied to the inverter unit according to an input signal varying with the degree of eccentricity of the cooking container, such that it allows the inverter unit to generate a constant-output signal; a small-load detector connected to an output terminal of the constant-output controller, for determining the absence of a cooking load when the input signal is less than a reference signal synchronized with the pulse-width control signal, and generating a feedback signal to interrupt an operation of the inverter unit; and a microprocessor for transmitting a constant-output control signal to the constant-output controller to allow the inverter unit to generate the constant-output signal, and interrupting the operation of the inverter unit when the feedback control signal is zero.