Title :
Custom spectral shaping for EMI reduction in electronic ballasts
Author :
Johnson, Sandra ; Yin, Yan ; Zane, Regan
Author_Institution :
Power Electron. Center, Colorado Univ., Boulder, CO, USA
Abstract :
This paper presents the use of frequency modulation (FM) as a spread spectrum technique to reduce EMI caused by high frequency electronic ballasts. Amplitude modulation (AM) effects due to ballast dynamics are counteracted by the use of uniquely shaped modulating waveforms, resulting in the elimination of power spectral density (PSD) distortion and reduced peak currents and component stress. A 12-15dB signal reduction is achieved to comply with typical FCC chimney requirements.
Keywords :
amplitude modulation; electromagnetic interference; fluorescent lamps; frequency modulation; lamp accessories; EMI reduction; FCC chimney requirement; FM; PSD; ballast dynamics; fluorescent lamp; frequency modulation; high frequency electronic ballast; peak current reduction; power spectral density; signal reduction; spread spectrum technique; waveform distortion; waveform modulation; Amplitude modulation; Bandwidth; Crosstalk; Electromagnetic interference; Electronic ballasts; FCC; Fluorescent lamps; Frequency modulation; Power electronics; Spread spectrum communication;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2004. APEC '04. Nineteenth Annual IEEE
Print_ISBN :
0-7803-8269-2
DOI :
10.1109/APEC.2004.1295800
