MC56F8013控制电路HID灯电子镇流器设计
毕业论文关键字：高强度气体放电灯；电子镇流器；功率因数校正；恒功率控制；数字控制
Design of Electronic Ballast for HID lamps
Abstract: Energy saving is one of the main topics of the environmental protection at present. With green living, low-carbon concept has been widely accepted, the requirement of new type of energy saving, high efficiency, environmental protection lighting is becoming more and more intense. Traditional light sources, such as Incandescent, Fluorescent have many disadvantages, which makes them unable to adapt to the needs of the lighting today. But High Intensity Discharge (HID) lamps has become one of the main products of modern lighting for its advantages of high luminous efficiency, long life, small size, light control and strong color and so on. Therefore the development of efficient, lightweight and little noise electronic ballast has become an important topic. The paper introduces the development of the electric light and their advantages and disadvantages. It also analyses the working principle and electrical characteristics of HID lamps and on the basis of that, it propose the design requirements of electronic ballasts .The paper also introduces the development and current status of the ballast. The paper then analyzes the key technology of electronic ballasts. It makes a comparison of several common topologies and then chooses the highest reliability and the most practical three-stage topology as the overall structure of the electronic ballast. Active Power Factor Correction (APFC) and the constant power control were studied in detail. Simulation analysis of the APFC and Buck circuit are conducted using Saber. The paper also designed other parts of the electronic ballast, including the ignition circuit, EMI suppression circuit, the full-bridge inverter circuit. The paper designs the digital control circuit which achieves the phased control of HID lamps based on the MC56F8013 and corresponding program is given at the same time. It designed a 70W high intensity discharge lamp electronic ballast, a detailed description of the design steps and parameter design are given. At last, experimental tests are taken over the 70W electronic ballast; the experimental results show that it meets the design requirements.
Key words: High intensity discharge lamps; electronic ballasts; power factor correction; constant power control; digital control
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