The Intelligent Control System Of The Railway Passenger Wangon Air-Condition Adjustment

The air conditioner in the train passenger wagon apply the frequency conversion scheme. It can realize the stepless regulation of refrigeration, reduce the consuming of power of the system, and improve comfortation of the passenger wagon. The air conditioner system with frequency conversion can change the rotate speed of compressor with the variation of the load. Because the change of temperature is small, the comfortation of the passenger wagon can be greatly improved. Besides, the air conditioner system with frequency conversion has many virtues such as small start-up current, fast refrigeration or calefaction, low noises and so on. Two objects are to be researched in this paper. One is the control method of air conditioner system .The other is the control method of the temperature control system.In the first part, the paper presents general condition of the air conditioner system of rain passenger wagon. Then it shows its disadvantage. It also presents the frequency conversion speed regulation of the air conditioner system of rain passenger wagon.In the second part, It is introduced how to realize the air conditioner with frequency conversion. After analyzing the characteristic of the load of the air conditioner system, it is presented the basic control strategy on how to realize the air conditioner with frequency conversion.In the third part, the paper presents the intelligent control strategies of the air conditioner system with frequency conversion scheme .The fuzzy control technology has obvious advantage because of its fuzzy illation without the math model of the system. The air conditioner system of rain passenger wagon with fuzzy control technology will lead to the development of the air conditioner system of rain passenger wagon in the future. In this system, the rotate speed of compressor, the extent of open of the electromagnet valve, the rotate speed of electric condensation fan all depend on the temperature data of the carriage from the temperature sensor and the temperature change ratio. Thus, the system can work in the most comfortable situation and save more energy sources.The elementary principles and features of these control methods are introduced respectively. The simulation model of the system is set up withMATLAB/SIMULINK. And the simulation results are presented and it proves the feasibility of these control strategies.In the fourth part, the hard system of the air conditioner control system is described. The system mainly includes the air conditioner controller frequency conversion and other circuits.Finally, it is presented the software of the air condition control system of rain passenger wagon.