PWM Dimming Module Allowing Wide DC-Link Voltage Variation

Victor Sui-pung Cheung; Jeff Po-wa Chow; John Wing-to Fan; Chung-pui Tung; Henry Shu-hung Chung

doi:10.1109/APEC.2018.8341046

PWM Dimming Module Allowing Wide DC-Link Voltage Variation

Victor Sui-pung Cheung, Jeff Po-wa Chow, John Wing-to Fan, Chung-pui Tung, Henry Shu-hung Chung

Centre for Smart Energy Conversion and Utilization Research

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

Abstract

A dimming module that can generate current pulses of variable pulse width, frequency, and amplitude supplying to LEDs from a DC source with high voltage ripple will be presented. The module is connected in series with the LEDs and acts as a buffer between the DC source and LED. Thus, its volt-ampere (VA) rating is much smaller than the power rating of the LED and the power density of the overall system is maximized. The module can regulate the LED current pulses, even if the source voltage has a wide fluctuation. The operating principle of the whole system is described in the paper. A 400V/100W prototype has been built and tested with a 330V LED string with the source having a ripple of ±20V. The peak value of the LED current pulses has a variation of ±1.5%. Its dynamic behaviors under voltage fluctuation will also be investigated.

Original language	English
Title of host publication	2018 IEEE Applied Power Electronics Conference and Exposition (APEC)
Publisher	IEEE
Pages	423-428
ISBN (Electronic)	9781538611807
DOIs	https://doi.org/10.1109/APEC.2018.8341046
Publication status	Published - Mar 2018
Event	33rd Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2018) - Henry B. Gonzalez Convention Center, San Antonio, United States Duration: 4 Mar 2018 → 8 Mar 2018 http://www.apec-conf.org/

Publication series

Name	Annual IEEE Conference Applied Power Electronics Conference and Exposition (APEC)
Publisher	IEEE
ISSN (Electronic)	2470-6647

Conference

Conference	33rd Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2018)
Country/Territory	United States
City	San Antonio
Period	4/03/18 → 8/03/18
Internet address	http://www.apec-conf.org/

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10.1109/APEC.2018.8341046

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title = "PWM Dimming Module Allowing Wide DC-Link Voltage Variation",

abstract = "A dimming module that can generate current pulses of variable pulse width, frequency, and amplitude supplying to LEDs from a DC source with high voltage ripple will be presented. The module is connected in series with the LEDs and acts as a buffer between the DC source and LED. Thus, its volt-ampere (VA) rating is much smaller than the power rating of the LED and the power density of the overall system is maximized. The module can regulate the LED current pulses, even if the source voltage has a wide fluctuation. The operating principle of the whole system is described in the paper. A 400V/100W prototype has been built and tested with a 330V LED string with the source having a ripple of ±20V. The peak value of the LED current pulses has a variation of ±1.5%. Its dynamic behaviors under voltage fluctuation will also be investigated.",

author = "Cheung, {Victor Sui-pung} and Chow, {Jeff Po-wa} and Fan, {John Wing-to} and Chung-pui Tung and Chung, {Henry Shu-hung}",

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language = "English",

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Cheung, VS , Chow, JP , Fan, JW , Tung, C & Chung, HS 2018, PWM Dimming Module Allowing Wide DC-Link Voltage Variation. in 2018 IEEE Applied Power Electronics Conference and Exposition (APEC). Annual IEEE Conference Applied Power Electronics Conference and Exposition (APEC), IEEE, pp. 423-428, 33rd Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2018), San Antonio, Texas, United States, 4/03/18. https://doi.org/10.1109/APEC.2018.8341046

PWM Dimming Module Allowing Wide DC-Link Voltage Variation. / Cheung, Victor Sui-pung ; Chow, Jeff Po-wa ; Fan, John Wing-to et al.
2018 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2018. p. 423-428 (Annual IEEE Conference Applied Power Electronics Conference and Exposition (APEC)).

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

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AU - Cheung, Victor Sui-pung

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AU - Fan, John Wing-to

AU - Tung, Chung-pui

AU - Chung, Henry Shu-hung

PY - 2018/3

Y1 - 2018/3

N2 - A dimming module that can generate current pulses of variable pulse width, frequency, and amplitude supplying to LEDs from a DC source with high voltage ripple will be presented. The module is connected in series with the LEDs and acts as a buffer between the DC source and LED. Thus, its volt-ampere (VA) rating is much smaller than the power rating of the LED and the power density of the overall system is maximized. The module can regulate the LED current pulses, even if the source voltage has a wide fluctuation. The operating principle of the whole system is described in the paper. A 400V/100W prototype has been built and tested with a 330V LED string with the source having a ripple of ±20V. The peak value of the LED current pulses has a variation of ±1.5%. Its dynamic behaviors under voltage fluctuation will also be investigated.

AB - A dimming module that can generate current pulses of variable pulse width, frequency, and amplitude supplying to LEDs from a DC source with high voltage ripple will be presented. The module is connected in series with the LEDs and acts as a buffer between the DC source and LED. Thus, its volt-ampere (VA) rating is much smaller than the power rating of the LED and the power density of the overall system is maximized. The module can regulate the LED current pulses, even if the source voltage has a wide fluctuation. The operating principle of the whole system is described in the paper. A 400V/100W prototype has been built and tested with a 330V LED string with the source having a ripple of ±20V. The peak value of the LED current pulses has a variation of ±1.5%. Its dynamic behaviors under voltage fluctuation will also be investigated.

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PWM Dimming Module Allowing Wide DC-Link Voltage Variation

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