References(2) This paper presents a commercialized dimmable electronic ballast for 1000 W metal halide (MH) lamp and its application. The ballast is a three-stage power converter. It is composed of boost converter to achive high power factor, buck converter to control lamp power, and an inverter to supply the lamp with low-frequency square-wave current. The power of 1000 W MH lamp can be varied linearly in the range from almost 65 % to 100 % with on-duty of the external control signal. Low current distortion, high efficiency of the ballast (94%), and low lamp power variation (less than 0.4%) are achieved. Furtheremore, an application of the ballast to a factory with high ceiling is demonstorated. As a result, we could achive reduction in energy consumption in the site.
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机译：参考文献（2）介绍了一种用于1000 W金属卤化物（MH）灯的商业化可调光电子镇流器及其应用。镇流器是三级功率转换器。它由实现高功率因数的升压转换器，控制灯功率的降压转换器和为灯提供低频方波电流的逆变器组成。 1000 W MH灯的功率可以根据外部控制信号的占空比在几乎65％至100％的范围内线性变化。实现了低电流失真，高镇流器效率（94％）和低灯功率变化（小于0.4％）。此外，证明了镇流器在高天花板工厂中的应用。结果，我们可以实现现场能耗的减少。
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