A new control method for a low frequency inverter of MHD lamp ballasts with a synchronous rectifier

I. K. Lee; B. H. Cho

doi:10.1109/APEC.2005.1453125

A new control method for a low frequency inverter of MHD lamp ballasts with a synchronous rectifier

I. K. Lee, B. H. Cho

Research output: Contribution to conference › Paper › peer-review

6 Citations (Scopus)

Abstract

In this paper, in order to improve the commutation characteristics of the low frequency bridge type ballasts, a new control method is proposed. It is characterized by the concept that the PWM controller modulates the output current with a square wave current reference and the inverting current rises monotonically. This method prevents the inverter from having an overshoot and a ringing problem on the inverted lamp current. As a result, the ZVS condition is maintained just after inverting and the restrike voltage of the lamp is minimized. Also, The principle of the proposed control is explained with an open loop description and the loss analysis of the improved inverter is performed. The new control scheme is adopted to a feedback controller and the operation is verified with the experimental results of a prototype 70W ballast.

Original language	English
Pages	1060-1064
Number of pages	5
DOIs	https://doi.org/10.1109/APEC.2005.1453125
Publication status	Published - 2005
Externally published	Yes
Event	20th Annual IEEEApplied Power ElectronicsConference and Exposition, APEC 2005 - Austin, TX, United States Duration: 2005 Mar 6 → 2005 Mar 10

Other

Other	20th Annual IEEEApplied Power ElectronicsConference and Exposition, APEC 2005
Country/Territory	United States
City	Austin, TX
Period	05/3/6 → 05/3/10

Keywords

2-stage ballast
Coupled inductor
Low frequency inverter
Synchronous rectifier

ASJC Scopus subject areas

Electrical and Electronic Engineering

Access to Document

10.1109/APEC.2005.1453125

Cite this

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title = "A new control method for a low frequency inverter of MHD lamp ballasts with a synchronous rectifier",

abstract = "In this paper, in order to improve the commutation characteristics of the low frequency bridge type ballasts, a new control method is proposed. It is characterized by the concept that the PWM controller modulates the output current with a square wave current reference and the inverting current rises monotonically. This method prevents the inverter from having an overshoot and a ringing problem on the inverted lamp current. As a result, the ZVS condition is maintained just after inverting and the restrike voltage of the lamp is minimized. Also, The principle of the proposed control is explained with an open loop description and the loss analysis of the improved inverter is performed. The new control scheme is adopted to a feedback controller and the operation is verified with the experimental results of a prototype 70W ballast.",

keywords = "2-stage ballast, Coupled inductor, Low frequency inverter, Synchronous rectifier",

author = "Lee, {I. K.} and Cho, {B. H.}",

year = "2005",

doi = "10.1109/APEC.2005.1453125",

language = "English",

pages = "1060--1064",

note = "20th Annual IEEEApplied Power ElectronicsConference and Exposition, APEC 2005 ; Conference date: 06-03-2005 Through 10-03-2005",

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T1 - A new control method for a low frequency inverter of MHD lamp ballasts with a synchronous rectifier

AU - Lee, I. K.

AU - Cho, B. H.

PY - 2005

Y1 - 2005

N2 - In this paper, in order to improve the commutation characteristics of the low frequency bridge type ballasts, a new control method is proposed. It is characterized by the concept that the PWM controller modulates the output current with a square wave current reference and the inverting current rises monotonically. This method prevents the inverter from having an overshoot and a ringing problem on the inverted lamp current. As a result, the ZVS condition is maintained just after inverting and the restrike voltage of the lamp is minimized. Also, The principle of the proposed control is explained with an open loop description and the loss analysis of the improved inverter is performed. The new control scheme is adopted to a feedback controller and the operation is verified with the experimental results of a prototype 70W ballast.

AB - In this paper, in order to improve the commutation characteristics of the low frequency bridge type ballasts, a new control method is proposed. It is characterized by the concept that the PWM controller modulates the output current with a square wave current reference and the inverting current rises monotonically. This method prevents the inverter from having an overshoot and a ringing problem on the inverted lamp current. As a result, the ZVS condition is maintained just after inverting and the restrike voltage of the lamp is minimized. Also, The principle of the proposed control is explained with an open loop description and the loss analysis of the improved inverter is performed. The new control scheme is adopted to a feedback controller and the operation is verified with the experimental results of a prototype 70W ballast.

KW - 2-stage ballast

KW - Coupled inductor

KW - Low frequency inverter

KW - Synchronous rectifier

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A new control method for a low frequency inverter of MHD lamp ballasts with a synchronous rectifier

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