| 摘要 |
PURPOSE:To keep good balance of the volumes and the weights between two apparatus main bodies and make the apparatuses light and easy for its thermal design by storing a switching element, a current limiting component, and a preheating means respectively in different apparatus main bodies. CONSTITUTION:A luminaire is composed of mainly an apparatus main body 2 for storing a main part 1b of an inverter lighting apparatus, an apparatus main body 3 for storing a current limiting component LB and a preheating means CS which compose a lighting apparatus, a wiring duct 4, and a discharge lamp 5. AC current supplied from an AC electric power supply AC is rectified by a rectifier DB, smoothed by a smoothing capacitor C, and then the resulting current is applied to a series circuit composed of a resonance inductor L1 and a switching element Q so as to carry out switching for the element Q at high and to light the discharge lamp 5 by the resonance of the inductor L1, the capacitor C, and the inductor LB. light. With this composition, the component Lb and the means CS are stored in the main body 3 separately from other parts such as the element Q, etc., which compose the lighting apparatus and the volumes and the weights of the main body 2 and those of the main body 3 are uniformalized and at the same time shadow formation on the irradiated faces is lessened. |
