Research On Energy-Saving Digital Ballast

The technology that lighting runs economically and effectively is an important applying branch of power electronics. It is a necessary tendency and requirement of the development of economy and technology as well as the important sign of city modernization to realize economical, dynamical, real-timed and networked management to the lighting systems in city. The article puts forward a kind of energy-saving digital ballast convenient for network function on base of the summarization for the working functions and their development tendencies of ballasts used by energy-saving lamps on remand, introduces its working principle, hardware structure, parameter computation, software system etc..First, the structure frame of the whole system is established. It mainly includes the filter part, the rectifier part, the power factor regulator part, the microprocessor and digit controller part, the communication part and the dimming part etc. Then, the working principle of every part is explained and the hardware and software structure of the digital ballast is designed in require and combining with the development trend of every part. The key parameters of main parts are computed and their numerical values are offered.The microprocessor and digit controller part is introduced particularly. The working principles of main controlling unit, main controlling circuit of ballast, power line communication circuit and dimming circuit etc. are analyzed. Their function diagrams are provided. And their functions to digital ballast are studied. Then their circuit performances are assessed.After that, the software system of digital ballast is given. It mainly includes the emulation software introduce and working software flow of the digital ballast. The software working principle is studied and its flow charts are afforded.At last, the structure and function of digital ballast are validated, the performances of the whole system are summarized and the development direction and application trend of digital ballast are given a brief browse.