| Electric Monorail is an important means of transportation on coal, to ensure electric monorail more efficient, longer life, better power need to be equippeded. Compared with.the traditional lead-acid batteries, power lithium batteries with a high-voltage, high-capacity, long cycle life and other advantages, therefore it became an new and better choices for electric monorail power supply.This paper first outlined the background and research significance of this topic, according to the performance of lithium-iron phosphate battery as the research object, at the same time introduces the present and the research status of power lithium battery charging system at home and abroad, introduces some charging method and on the basis of the existing charging method, puts forward a combined pulse charging and constant current charging method of three phase quick charge. This.mixed charging method is close to acceptable charging current of battery charging curve, at the same time pulse charging can eliminate polarization phenomenon produced in the process of charging.Secondly, we have designed a circuit configuration of the main charging system includes a rectifier filter, the inverter circuit, the battery discharge recovery circuit. The control circuit mainly DSP28335core chip, the charging voltage of the charging data system, current, temperature are analyzed and calculated into the DSP, while charging the battery management system and real-time communication system, access terminals of the battery voltage, temperature and other parameters.To get the appropriate control signals through RBF neural network PID control strategy, control the main circuit switch-off,while achieving the charging circuit including the voltage, current and temperature of IGBT modules and high-frequency transformer monitoring system for charging played a very good protection.Finally, the charge control method for RBF neural network PID control algorithm some research in the matlab/simulink environment to build a model of the charging system to verify the control algorithm results in the system. |
