Digital PFC control system for power source products

• Main Authors: YANG YUQIU, XIAO YANYI, LIN YONGWANG
• Format: Patent
• Language: English
• Published: 25.03.2015
• 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

The invention discloses a digital PFC control system for power source products. The digital PFC control system is composed of an air switch, an EMC filter, a rectifier bridge, a BOOST circuit and a DSPIC single chip microcomputer. The input end of the EMC filter is connected with an input power source through the air switch, and the output end of the EMC filter is connected with the input end of the BOOST circuit through the rectifier bridge. The DSPIC single chip microcomputer is connected with the control end of the BOOST circuit, the DSPIC single chip microcomputer samples an input voltage, an input current and an output voltage from the BOOST circuit, and the DSPIC single chip microcomputer outputs a PWM signal to the BOOST circuit by digital signal processing and controls the BOOST circuit. The digital PFC control system for power source products has the advantages of being high in stability, capable of achieving online programming, simple in circuit, convenient to debug, high in flexibility, low in cost, capable of realizing load sudden change control, excellent in performance, capable of obviously increasing the PF value and the THD value of a system circuit and the like.