Electrical Engineering  2015, Vol. 16 Issue (03): 15-17    DOI:
Orginal Article Current Issue| Next Issue| Archive| Adv Search |
Design and Analysis of a Single-Stage Bridgeless Boost-Buck Converter
Zheng Qingliang, Zhang Qiang, Lin Weiming
Electrical Engineering and Automation, Fuzhou University, Fuzhou 350116

Download: PDF (0 KB)   HTML (1 KB) 
Export: BibTeX | EndNote (RIS)      
Abstract  Two-stage circuit is widely used in the high-power LED driver supply. However, the cost increases for requiring more components and two sets of control, and the full-bridge diode rectifier also reduces the converter efficiency due to the large conduction losses. This paper presents a novel single-stage (SS) bridgeless Boost-Buck circuit. Boost circuit serves as a PFC stage and Buck as a DC/DC stage. Bridgeless structure can reduce conduction losses effectively, the proposed DCM+CCM control strategy is used to simplify the control. At last, a prototype with 85~135Vrms input and 2A/150W output was set up to verify the theoretical analysis.The power efficiency>90%, high power factor≥0.985 and THD<17% were achieved at rated output power. The experimental results show that the proposed topology has better performance than two-stage Boost+Buck in low-input voltage & high-input current occasion.
Key wordsLED driver      power factor correction      single-stage bridgeless boost-buck      efficiency     
Received: 20 April 2015      Published: 23 March 2015
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
Zheng Qingliang
Zhang Qiang
Lin Weiming
Cite this article:   
Zheng Qingliang,Zhang Qiang,Lin Weiming. Design and Analysis of a Single-Stage Bridgeless Boost-Buck Converter[J]. Electrical Engineering, 2015, 16(03): 15-17.
URL:  
https://dqjs.cesmedia.cn/EN/Y2015/V16/I03/15
Copyright © Electrical Engineering
Supported by: Beijing Magtech