1. A Single-Stage LED Driver Based on ZCDS Class-E Current-Driven Rectifier as a PFC for Street-Lighting Applications.
- Author
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Mangkalajan, Satit, Ekkaravarodome, Chainarin, Jirasereeamornkul, Kamon, Thounthong, Phatiphat, Higuchi, Kohji, and Kazimierczuk, Marian K.
- Subjects
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RESONANT inverters , *LIGHT emitting diodes , *ELECTRIC current rectifiers , *ELECTROLUMINESCENT devices , *ELECTRIC power supplies to apparatus - Abstract
This paper presents a light-emitting diode (LED) driver for street-lighting applications that uses a resonant rectifier as a power-factor corrector (PFC). The PFC semistage is based on a zero-current and zero-derivative-switching (ZCDS) Class-E current-driven rectifier, and the LED driver semistage is based on a zero-voltage-switching (ZVS) Class-D LLC resonant converter that is integrated into a single-stage topology. To increase the conduction angle of the bridge-rectifier diodes current and to decrease the current harmonics that are injected in the utility line, the ZCDS Class-E rectifier is placed between the bridge-rectifier and a dc-link capacitor. The ZCDS Class-E rectifier is driven by a high-frequency current source, which is obtained from a square-wave output voltage of the ZVS Class-D LLC resonant converter using a matching network. Additionally, the proposed converter has a soft-switching characteristic that reduces switching losses and switching noise. A prototype for a 150-W LED street light has been developed and tested to evaluate the performance of the proposed approach. The proposed LED driver had a high efficiency (>91%), a high PF (>0.99), and a low total harmonic distortion (THD $_{i}$ < 8%) under variation of the utility-line input voltage from 180 to 250 ${{V}}_{{\rm{rms}}}$. These experimental results demonstrate the feasibility of the proposed LED scheme. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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