Power factor correction circuit, control method and controller
AssigneeSilergy Semiconductor Technology (Hangzhou) LTD
InventorsZhaofeng Wang, Xiaodong Huang, Chen Zhao
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Abstract
A power factor correction circuit can include: a power meter configured to measure THD at an input port; a switching-type regulator that is controllable by a switching control signal in order to adjust a power factor of an input signal thereof; and a controller configured to generate the switching control signal to control the switching-type regulator to perform power factor correction, where the controller minimizes the THD by adjusting a current reference signal according to a measured THD, and the current reference signal represents an expected inductor current of the switching-type regulator.
Claims15
A power factor correction circuit, comprising:
- a) a power meter configured to measure total harmonic distortion (THD) at an input port;
- b) a switching-type regulator that is controllable by a switching control signal in order to adjust an inductor current of said switching-type regulator to perform power factor correction;
- and
- c) a controller configured to generate said switching control signal to control said switching-type regulator, wherein said controller reduces said THD by adjusting a current reference signal according to a measured THD, and said current reference signal represents an expected inductor current of said switching-type regulator.
A method of controlling a switching-type regulator with power factor correction, the method comprising:
- a) measuring, by a power meter, total harmonic distortion (THD) at an input port;
- b) controlling said switching-type regulator by a switching control signal for adjusting an inductor current of said switching-type regulator to perform power factor correction;
- and
- c) generating, by a controller, said switching control signal for controlling said switching-type regulator, wherein said controller reduces said THD by adjusting a current reference signal according to a measured THD, and said current reference signal represents an expected inductor current of said switching-type regulator.
Dependencies are inferred from the claim text.