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Integrated Bridgeless-Boost Nonresonant Half-Bridge Converter Employing Hybrid Modulation Strategy for LED Driver Applications.
- Source :
-
IEEE Transactions on Industrial Electronics . Sep2021, Vol. 68 Issue 9, p8049-8060. 12p. - Publication Year :
- 2021
-
Abstract
- A single-stage high-power-factor LED driver based on the integration of the bridgeless boost rectifier with the nonresonant half-bridge converter (BLB-HB-NR) employing a hybrid modulation strategy is introduced in this article. A key feature of the proposal is that the system can operate with universal input voltage range and dimming from 100% to 10% of rated output power while keeping the dc-link voltage limited to a safe level. In the proposed hybrid scheme, the LEDs current is regulated by pulse-frequency-modulation (PFM) while the dc-link is controlled using an asymmetrical-pulsewidth-modulation strategy. The system owns important operational and constitutive features, such as reduced component count, high-power factor and soft switching on the main switches, thus a high-efficiency operation is achieved. Steady-state and dynamic analyses are discussed in the article and a complete control strategy is also elaborated. Finally, experimental results for a universal input voltage, 42 W output power prototype demonstrates the feasibility of the proposed lighting system. [ABSTRACT FROM AUTHOR]
- Subjects :
- *VOLTAGE
*AUTOMOBILE lighting
Subjects
Details
- Language :
- English
- ISSN :
- 02780046
- Volume :
- 68
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Industrial Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 151250460
- Full Text :
- https://doi.org/10.1109/TIE.2020.3013749