Fuzzy control of a universal battery charger

G. Bandara, R. Ivanov, S. Gishin
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引用次数: 7

Abstract

Fuzzy control of a Universal Battery Charger is investigated. Effective control of the charging process is complex, due to the exponential relationship between the charging current and the charging time. Classical control algorithms such as PID, PI etc. are difficult to implement in this event, due to nonlinear current-time relationships of rechargeable batteries. Initial peak charging current is estimated depending on the coefficient of discharge of the battery. An intelligent microcontroller based system is developed to sense the charging current and the present charge, after which a fast fuzzy inference mechanism defines the next level of the charging current. Delay time of the switching of the main supply is calculated after the fuzzy inference, and the power switch is switched accordingly. Experimental results and expert knowledge are used for tuning of the membership functions and the rule base of the fuzzy controller.
通用电池充电器的模糊控制
研究了一种通用充电器的模糊控制。由于充电电流与充电时间呈指数关系,充电过程的有效控制是复杂的。由于可充电电池的非线性电流-时间关系,传统的PID、PI等控制算法难以实现。根据电池的放电系数估算初始峰值充电电流。开发了一种基于单片机的智能充电电流感知系统,通过快速模糊推理机制确定下一级充电电流。通过模糊推理计算出主电源开关的延时时间,并据此进行电源开关的切换。利用实验结果和专家知识对模糊控制器的隶属函数和规则库进行了整定。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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