Patent ID: 11937341
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F  G | IPC F  G  H

Claim 0:
1. A cooking apparatus comprising:
a plurality of power input terminals including at least a first live terminal, a second live terminal, and a neutral terminal;
a plurality of heaters;
a detection circuit connected to the plurality of power input terminals and configured to:
perform half-rectification of each of a first electronic signal of the power between the first live terminal and the neutral terminal and a second electronic signal of the power between the second live terminal and the neutral terminal; and
output a first square wave of the first electronic signal a second square wave of the second electronic signal; and

a processor configured to:
detect falling edges of the first and the second square waves output from the detection circuit;
detect an interval between the detected falling edges of the first and second square waves;
based on an electric wire being connected to the plurality of power input terminals and power being input, identify a phase difference of the input power based on the interval;
based on the phase difference being within one of a plurality of threshold ranges, identify a voltage between live terminals among the plurality of power input terminals based on the phase difference of the power and control to operate at least one heater among the plurality of heaters according to the identified voltage between the live terminals; and
based on the phase difference being outside the plurality of threshold ranges, control to stop the operation of the cooking apparatus.