Development Of The Switch Power Supply For Lamp-charging Rack

The power for lamp-charging rack is a regulated power supply in our country in most cases now, and one hundred lamp can be charged by it at the same time. Because the regulated power supply has many defects, such as much energy consumption, low efficient, large in volume, high costs, and so on, a kind of switch power for lamp-charging rack is developed, and replace conventional regulated power supply. It has most important meaning that the switch power saves energy, reduce deterioration and increase charger's efficiency.By analyzing switch power's features which are low electric voltage and big electric current. Firstly, the essay presents charging power design scheme which has the characteristics of low voltage, big current and large power according to the principle of the switch power, and design scheme is demonstrated. The rectifier filter's circuit is developed through current design and parameters optimization, the surge current is quenched and the AC voltage is transferred into high DC voltage to supply the DC/DC converter. The big power DC/ DC transformation model is chosen as power cell of main electric circuit through calculation and screen sizing. High DC voltage which is generated by high voltage rectifier filter current is converted into a high frequency impulse DC voltage and the result is sent to the main transformer to be converted into low frequency impulse DC voltage. The step-down controller UC3573 and voltage compensation principle are adopted to design the small power DC/DC converter circuit which provides auxiliary circuit of power. The current-sharing controller UC3907 is adopted to design the current-sharing circuit for power supply, it can realize parallel multi-module to compose power supply system much more huge than one module. The measures to reject electromagnetism interference of switch power are presented, this is vital to reducing the switch power's deterioration. It produces well functions because of the choosing of radiator and fans.The results of practical operation have manifested the system can achieve demands of...