Electroless capacitor single-phase inverter low-frequency ripple reduction topological structure and modulation method

• Main Authors: XU YINGNIAN, CHEN WEI, MA SIYUAN, LIU LIANYUAN, LIU FURONG, CHEN HAO, LIANG BIAO, LI XIAOKUN, ZHU GUORONG
• Format: Patent
• Language: English
• Published: 25.02.2015
• 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 provides an electroless capacitor single-phase inverter low-frequency ripple reduction topological structure which comprises a low-frequency ripple reduction module composed of two power switch tubes in complementary connection. The two power switch tubes are connected on the direct-current side of a single-phase inverter after being connected in series, and the connection point of the two power switch tubes is connected with the middle point of two capacitors of a filter circuit; the filter circuit is connected with the alternating-current side of the single-phase inverter and comprises two sets of inductors and capacitors, and the two sets of inductors and capacitors are symmetric. On the basis of an original inverter, people only need to detach an inductor and a capacitor of the filter circuit into two symmetric sets of inductors and capacitors and additionally arrange one low-frequency ripple reduction module composed of the two power switch tubes, pulse power can be controlled to be on the two filter capacitors by controlling the on-off state of the power switch tubes of the low-frequency ripple reduction module, elimination of electrolytic capacitance on the direct-current side in the inverter is eliminated, and system reliability is improved.