High-frequency heating apparatus having a digital-controlled inverter
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United States of America Patent
Stats
-
Jun 5, 1990
Grant Date -
N/A
app pub date -
May 26, 1989
filing date -
May 30, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A high-frequency heating source supplies a predetermined high-frequency heating power. An AC input is supplied to an inverter circuit. The inverter circuit generates a high-frequency output signal for driving the high-frequency heating source. The inverter circuit comprises a rectifier circuit for rectifying the AC input, and a switching element for switching the DC output supplied from the rectifier circuit. The inverter circuit is controlled by an inverter control circuit. A processor supplies set heating-output data associated with the high-frequency heating power to the inverter control circuit. The inverter control circuit comprises a counter and an on/off signal generator. The counter is set to a on-period in accordance with the set heating-output data, and performs counting operation. The on/off signal generator generates an on/off signal in accordance with a count value of the counter. A driving circuit drives the switching element of the inverter circuit in response to the on/off signal supplied from the inverter control circuit.
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