Cascade type realize stepping down wantonly switching capacity type AC-AC converter of transformation ratio

• Main Authors: WANG WEI, CAI HUI, BAO LITING, CHEN WEIMIN, YOU JIACHUAN
• Format: Patent
• Language: English
• Published: 05.08.2015
• 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 utility model discloses a cascade type realize stepping down wantonly switching capacity type AC-AC converter of transformation ratio. The basic element circuit of the arbitrary input/output KN transformation ratio of a plurality of realizations cascades in proper order, and basic element circuit comprises the power switch that electric capacity and multiunit are established ties in proper order, and power switch group of every group includes the power switch pipe that two source electrodes are established ties each other, and arbitrary adjacent two power switchs group series connection back both ends are a parallelly connected electric capacity all, and drive circuit is connected with power switch pipe grid, both ends after arbitrary a plurality of electric capacity are established ties among the parallelly connected last one-level basic element circuit of arriving in both ends of power switch group series connection back among the inferior one-level basic element circuit. The utility model discloses realized being applied to the voltage output of the different gears of the transformation ratio of arbitrary step-down in the design of other gear speed governing with the cascade system, only using electric capacity as energy storage device, not containing magnetic element, reduce the volume of converter, equivalent internal resistance is little and along with the increase of basic element circuit progression does not basically change, power density is high.