Laminated busbar of double-transistor parallel NPC three-level inverter and inverter

• Main Authors: YU BICHAO, DOU YICHAO, CHEN MEIZHI, WANG HAILIANG, ZHANG YANQING, MA XUN, YANG XIN
• Format: Patent
• Language: Chinese; English
• Published: 22.09.2023
• 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 a laminated busbar of a double-tube parallel NPC three-level inverter and the inverter. The laminated busbar comprises four layers of busbars, the first layer of busbar is used for arranging a connecting terminal for installing a surge absorption capacitor; the second-layer busbar and the fourth-layer busbar adopt mirror image design and are used for electrical connection between an upper bridge arm of the inverter and a P-pole direct-current bus or between a lower bridge arm of the inverter and an N-pole direct-current bus, electrical connection between controllable semiconductor devices in the upper bridge arm and the lower bridge arm of the inverter and electrical connection between the controllable semiconductor devices and clamping diodes; the third layer of busbar is used for electrical connection of AC output of the upper bridge arm and the lower bridge arm of the inverter and electrical connection of the two clamping diodes and the O-pole DC bus; and two groups of connecting hol