High-frequency heating device and method and apparatus for controlling power supply of the same

An apparatus for controlling a power supply of a high-frequency heating device, comprising:

• a current detecting module, configured to detect a real-time current flowing through a switching element of the high-frequency heating device;
• a controlling module, connected with the current detecting module and configured to control the switching element to operate according to a control signal with a preset duty ratio, to control the switching element to turn off if the real-time current is greater than or equal to a preset current reference value, and to control the switching element to turn on when a next turning-on window of the control signal comes and the real-time current is less than the preset current reference value;
• wherein if the real-time current is less than the preset current reference value, the controlling module is further configured to control the switching element to keep turning on until a present turn-on window of the control signal ends, to control the switching element to turn off when the present turn-on window of the control signal ends, and to control the switching element to turn on when the next turn-on window of the control signal comes and the real-time current is less than the preset current reference value.

A high-frequency heating device comprising the apparatus for controlling the power supply of the high-frequency heating device, the apparatus comprising:

• a current detecting module, configured to detect a real-time current flowing through a switching element of the high-frequency heating device;
• a controlling module, connected with the current detecting module and configured to control the switching element to operate according to a control signal with a preset duty ratio, to control the switching element to turn off if the real-time current is greater than or equal to a preset current reference value, and to control the switching element to turn on when a next turning-on window of the control signal comes and the real-time current is less than the preset current reference value;
• wherein if the real-time current is less than the preset current reference value, the controlling module is further configured to control the switching element to keep turning on until a present turn-on window of the control signal ends, to control the switching element to turn off when the present turn-on window of the control signal ends, and to control the switching element to turn on when the next turn-on window of the control signal comes and the real-time current is less than the preset current reference value.