Variable switch capacitive type AC-AC convertor achieving 1/2 n no-load voltage ratio

• Main Authors: WANG WEI, CAI HUI, BAO LITING, CHEN WEIMIN, YOU JIACHUAN
• Format: Patent
• Language: English
• Published: 15.07.2015
• 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 variable switch capacitive type AC-AC convertor achieving 1/2 n no-load voltage ratio. The variable switch capacitive type AC-AC convertor achieving 1/2 n no-load voltage ratio is mainly composed of sequentially cascading of multiple basic unit circuits. Each basic unit circuit comprises three capacitances and four power switching groups which are in series connection in sequence. Each power switching group comprises two power switching pipes with two poles are in series connection, and two ends are both connected with one capacitance in parallel after any two adjacent power switching groups are connected in series respectively; a cascade mode is that the two ends after the four power switching groups in an inferior basic unit circuit are in parallel connection with the two ends of any capacitance in a superior basic unit circuit. According to the variable switch capacitive type AC-AC convertor achieving 1/2 n no-load voltage ratio, voltage output of different gears with 1/2 n no-load voltage ratio is achieved by adopting the cascade mode, and the variable switch capacitive type AC-AC convertor achieving 1/2 n no-load voltage ratio can be applied to design of speed adjusting of different gears; the capacitances serve as an energy storage element, the size of the convertor is reduced, the equivalent internal resistance is small and change of the equivalent internal resistance does not occur with the increase of progression of the basic unit circuit, and the power density is high.