Holtek Semiconductor Corp.

Chun-Ku Lin

Chun-Hsiung Chen

Yuan-Ho Liu

Jason Chen

Kuo-Hsiang Chen

A method of power control apparatus for electric cookers is provided. In the method, a micro controller unit (MCU) with a programmer pulse generator (PPG) and analog/digital (AID) converters is utilized, wherein a command can be inputted externally to the MCU for restarting or stopping the output of the PPG; and the PPG is capable of outputting pulses of programmable pulse width, being programmed by software for power control and, also, the protection of power control apparatus.

Power control apparatus and method for electric cookers

A power control apparatus for electric cookers includes an input unit, an output unit, a micro controller unit (MCU), having a programmer pulse generator (PPG) and at least an analog/digital converter built therein, a power circuit, an exciter-coil circuit, an output circuit of insulated gate bipolar transistor (IGBT), and a drive circuit of insulated gate bipolar transistor (IGBT). A command can be inputted externally to the MCU for restarting or stopping the output of the PPG and the PPG is capable of outputting pulses of programmable pulse width.

In the present invention, a temperature compensation circuit is provided. The temperature compensation circuit includes a first oscillator for providing a first clock signal, a timer electrically connected to the first oscillator for clocking a specific time period, a voltage regulator for generating a constant voltage, a second oscillator electrically connected to the voltage regulator for providing a second clock signal, and a counter electrically connected to the second oscillator for counting within the specific time period based on the second clock signal so as to obtain a counting value, and thereby a frequency of the second oscillator is obtained for the temperature compensation.

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Baoshan Shiang, Taiwan

Chun-Ku Lin