POWER CIRCUIT WITH LOW TOTAL HARMONIC DISTORTION

• Main Authors: KUO CHUNIEH, CHEN KE-HORNG, CHIU SHAO-WEI, TU SHIH-PING, HSIAO CHENG-PO
• Format: Patent
• Language: English
• Published: 20.10.2016
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

A power circuit with a low total harmonic distortion includes a conversion module and a control module, and the conversion module includes a first switch, a second switch, a power storage element and a conversion element. Both ends of the power storage element are electrically connected to the first switch, the second switch and the conversion element. Trigger ends of the first and second switches are electrically connected to the control module. If the input voltage is smaller than a predetermined value, the control module will output a control pulse to the second switch, and the second switch will conduct and drive the power storage element to boost the input voltage to generate a compensating current in a timing cycle, and the second switch will cut off and allow the compensating current to be converted into a voltage form by the conversion element and outputted in another timing cycle.