High frequency heating apparatus using microcomputer controlled inverter

Claim 1

A high frequency heating apparatus comprising: a high frequency heating source for providing a predetermined high frequency heating output; inverter means for receiving an AC input and providing a high frequency output for driving said high frequency heating source, said inverter means including rectifying means for rectifying the AC input and a switching element for switching a DC output from said rectifying means; voltage detecting means for detecting an output voltage value from said switching element of said inverter means; microprocessing means for outputting an ON/OFF signal with generation timing determined by interrupt processing in accordance with output voltage value detected by said voltage detecting means, said microprocessing means including: (a) generating means for generating a reference clock; (b) counter means for counting reference clocks generated by said generating means in accordance with a set output value associated with the high frequency heating output; (c) ON/OFF signal generating means for outputting the ON/OFF signal having the ON and OFF periods corresponding to a count result of said counter means; driving means for driving said switching element of said inverter means in accordance with the ON/OFF signal output from said microprocessing means.