Three-phase switched capacitor converter without electrolytic capacitor for Power LEDs and low output current ripple

• Published in: 2015 IEEE 24th International Symposium on Industrial Electronics (ISIE) pp. 1208 - 1214
• Main Authors: Coutinho, Ronaldo P., Sa, Edilson M., de Souza, Kleber C. A., Miranda, Pedro H., Antunes, Fernando L. M.
• Format: Conference Proceeding Journal Article
• Language: English
• Published: IEEE 01-06-2015
• Subjects: Capacitors; Converters; Cost engineering; Diodes; Discharges (electric); Electrolytic capacitors; Feasibility; Inductors; Light emitting diodes; Lighting; power LEDs; Prototypes; Reactive power; Ripples; street lighting; switched capacitor; Switches; three-phase converter
• ISSN: 2163-5137; 2163-5145
• DOI: 10.1109/ISIE.2015.7281644

This paper presents a three-phase switched capacitor converter to drive power light-emitting diodes (LEDs). The proposed converter does not utilize electrolytic capacitors, providing a high useful lifetime. In addition, the converter does not have diode bridge input rectifier, which can increase the converter efficiency. Moreover, it can stabilize the output current in open loop control, without needing current sensors, which reduces the project cost. A 54 W prototype was implemented to demonstrate the feasibility of the proposed converter. Experimental results are presented and discussed. The prototype presented a power factor of 0.98 and an efficiency of 79 %.