Patent ID: 6552313
Filing Date: 2003-04-22
Classification: H05B

Abstract:
A high-frequency heating apparatus comprising:a power supply unit, connected to a power supply line with an overcurrent circuit breaker arranged on the upstream side, supplied with a.c. power from the power supply line, and converting the a.c. power to a d.c. power; an input current detector; a power converting unit having at least one semiconductor device to convert the power from the power supply unit into high-frequency waves; a device controller for controlling the semiconductor device; an electromagnetic wave radiating unit for radiating electromagnetic waves using the power from the power converting unit; and a circuit for implementing negative feedback control, in the device controller, of the output from the input current detector, The high-frequency heating apparatus further including an input current controller for controlling the input current such that the input current characteristic of the high-frequency heating apparatus will approximate the current cutoff characteristic of the overcurrent circuit breaker with respect to the elapsed time.