| A digital intelligent charging system that can charge batteries of various specifications and types is designed in this thesis. The research is conducted based on the current development of quick charging technology and in the light of army demand.In the first place, the working principle of the system is introduced. An integrated control method of battery charging is proposed, which integrates voltage control, timing control and battery temperature control. Secondly, the hardware design of the system and its realization process is discussed in full detail. How to realize the power factor correction technology and the two-transistor forward converter of the system is expounded emphatically. The control circuit with 16-bit microprocessor (XC164) as its core is designed, thus leading to the digital control of the system. The electromagnetic compatibility of the system is explicated as well. Thirdly, the software design of the system is presented. Specifically, a fuzzy control that can conduct real time control according to batteries' charged state is designed in the light of engineering reality, thus resulting in the intelligent and optimization control in the charging process. Precise tests of signal amount are guaranteed by using digital filter and sliding window algorithm. The information transmission between the system and digital battery is realized by means of SMBus.To conclude, a series of experiments have demonstrated that this system enjoys charging of efficiency and reliability, adaptability to complicated situation, and high power factors and thus slight electric network pollution. In addition, related departments have proved that this system operates well and it can satisfy users' demands. |
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