Research And Design Of Solar Energy Electronic Ballast For HID Lamp

Energy saving has become a world-wide topic because of the foreseeable shortage of non-renewable energy. Energy saving is situated on the strategic station as the important object of our country development programming. Green lighting is attracting more and more attention in ten energy saving projects. A high efficiency and long life HID lamp plays an important role. As a result, the research of electronic ballast for HID lamp, especially based on renewable energy, has become a hot.In this paper, the solar energy electronic ballast for low power HID lamp is studied and designed. System structure and function modules are given, which is based on technical characteristics and requirement of electronic ballast. Main circuit topology is optimized. Analysis of starting technique, acoustic resonance and steady state control is proceeded. A novel slipping frequency soft start-up circuit based on two starting methods is designed. Mechanism, detection and elimination of acoustic resonance are introduced in detail, corresponding eliminating circuit is designed. Two power control methods are introduced. Approximately constant power control circuit is designed.The solar energy electronic ballast for 35W HPS lamp is developed successfully. Optimal switch frequency is selected. Magnetic component is designed for converter. The selection of LCC series parallel load circuit parameters is analyzed in detail. Protection circuits are designed for good reliability and security. Experiment results are satisfied with the expected objection.