LED Series Current Regulator Based on a Modified Class-E Resonant Inverter

This paper presents a new topology based on a modified class-E resonant inverter used as an LED series current regulator. The proposed topology behaves as a controllable nondissipative impedance that adjusts the current flowing through the lamp. In this circuit, the LED is placed at the dc side of t...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2018-12, Vol.65 (12), p.9488-9497
Main Authors: Ribas, Javier, Quintana-Barcia, Pablo J., Cardesin, Jesus, Calleja, Antonio J., Corominas, Emilio Lopez
Format: Article
Language:English
Subjects:
Ballast
Capacitors
Circuits
Class-E inverter
Control theory
Converters
Diodes
Electric potential
Feedforward control
High intensity discharge lamps
Inductance
Inverters
LED driver
Light emitting diodes
Regulators
resonant power conversion
Stability
Topology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents a new topology based on a modified class-E resonant inverter used as an LED series current regulator. The proposed topology behaves as a controllable nondissipative impedance that adjusts the current flowing through the lamp. In this circuit, the LED is placed at the dc side of the class-E inverter, in series with the input filter inductance. The power handled by the ac side is sent back to the input by means of two diodes. Despite the addition of these two diodes, the converter maintains all the advantages of the class-E inverter: low component count, simple control, and extremely low switching losses. The LED current can be controlled with a small variation of the operating frequency. This way, the low-frequency current ripple of the lamp can be strongly reduced even when there is a considerably high input voltage excursion, such as the one expected in electrolyticless high-power-factor LED ballast. This paper proposes a simplified methodology based on the fundamental approach aiming to design and build a laboratory prototype. The prototype is designed in order to minimize the effect of LED voltage in the output current. This way, the input voltage ripple can be canceled using a simple feedforward control.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2018.2822618