PWM power regulator device
AssigneeArico Technology Co., Ltd.
InventorNan-Cheng Chiang
Life of this patent
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Abstract
A PWM power regulator device has a processor, an input interface circuit, a zero phase detecting circuit and a thyristor. The input interface circuit is connected to a PWM output terminal of an external digital control circuit and the processor. The processor calculates a period and duty cycle of a PWM signal from the PWM output terminal and then outputs a triggering signal to the thyristor. The thyristor is triggered at different conduct angle according to the triggering signal and the triggering signal is determined by the processor according to the PWM signal. Therefore, the power regulator device is directly connected to the PWM output terminal of the digital control circuit without digital to analog converter.
Claims16
A PWM power regulator device comprising:
- a processor having calculating and storing capabilities, inputs and outputs;
- an input interface circuit connected to the input of processor and adapted to connect to an PWM output terminal of an external digital control circuit to receive PWM signal;
- a zero phase detecting circuit connected to the input of the processor and adapted to couple to a load power source of an AC sin signal, and detecting timings of zero phase of the load power source to the processor;
- and
- at least one thyristor having
- a triggering terminal connected to the output of the processor and triggered by the processor;
- and
- two terminals adapted to connect to load power source in serial;
- whereby the processor triggers the thyristor at different conduct angle according to a duty cycle of the PWM signal and the timing of zero phase of the load power source.
Dependencies are inferred from the claim text.