Design and Implementation of a Single-Stage Low-Frequency Square-Wave-Driven Electronic Ballast for HID Lamps

摘要

This paper presents a single-stage low-frequency square-wave-driven electronic ballast for supplying high-intensity-discharging (HID) lamps with interleaved power-factor-correction (PFC) features. The proposed ballast, which integrates an interleaved PFC converter with a high/low-frequency square-wave-driven full-bridge inverter into a single-stage, not only offers input utility-line current shaping, but also supplies the lamp with low-frequency square-wave sources without accompanying acoustic resonance. The features of the presented ballast are cost-effectiveness, low total-harmonic-distortion (THD), high power factor (>0.99), and high efficiency (>90%) due to the achievement of zero-voltage switching (ZVS) in the high-frequency-operated power switches. This paper demonstrates the theoretical analysis, design guidelines, and experimental results for a prototype ballast supplying a 70-watt HID lamp drawing from a utility-line root-mean-square (rms) voltage of 110 V.