HIGH-FREQUENCY HEATING DEVICE AND POWER SUPPLY CONTROL METHOD AND POWER SUPPLY CONTROL APPARATUS FOR SAME

摘要

Disclosed is a power supply control method for a high-frequency heating device, comprising: controlling, according to a control signal having a preset duty cycle, a switching device of the high-frequency heating device to work; detecting a real-time current passing through the switching device; and controlling the switching device to be turned off when the real-time current is greater than a preset current reference value, and not until a next turn-on window of the control signal arrives, controlling the switching device to be turned on. The power supply control method can control power of a high-frequency heating device, and can further reduce the maximum current value during work of the switching device, which reduces requirements on the switching device and can perform effective overcurrent protection. Further disclosed is a power supply control apparatus for a high-frequency heating device and a high-frequency heating device having the power supply control apparatus.