Improved power quality opto-couplerless Cuk converter for flickerless LED lighting

Pal, Somnath ; Singh, Bhim ; Shrivastava, Ashish ; Chandra, Ambrish ; Al-Haddad, Kamal (2015) Improved power quality opto-couplerless Cuk converter for flickerless LED lighting In: 2015 IEEE Energy Conversion Congress and Exposition (ECCE), 20-24 Sept. 2015, Montreal, QC, Canada.

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This paper presents a single stage isolated Cuk converter for low power light emitting diode (LED) driver systems. An opto-couplerless feedback control using primary-side regulation technology is presented in discontinuous conduction mode (DCM). A complete analysis of the converter is carried out using pulse-frequency modulation technique. The primary focus of this work is to develop a cost effective solution for an LED driver with improved power quality and efficiency. For low power lighting, this work results in a maximum power factor (PF) of 0.99 and minimum total harmonic distortion (THD) in AC mains current of 3.37% over universal AC voltage. The proposed Cuk topology offers high efficiency and constant voltage-constant current (CV-CC) control. Moreover, for high efficiency, coupling capacitors at both sides of the transformer have been optimized to a film capacitor with low dissipation factor and long life as compared to commonly used electrolytic capacitors. A 27 W prototype with a converter efficiency of 88% has been developed to validate the proposed approach.

Item Type:Conference or Workshop Item (Paper)
Source:Copyright of this article belongs to Institute of Electrical and Electronics Engineers.
Keywords:Power Quality; Discontinuous Conduction Mode (DCM); Power Factor Correction (PFC); Primary-Side Regulation (PSR); Pulse Frequency Modulation (PFM); Safety Extra Low Voltage (SELV)
ID Code:110475
Deposited On:04 Aug 2017 12:23
Last Modified:04 Aug 2017 12:23

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