Researched The Hoist Crane Energy Management System Based On Super Capacitor

The present paper conducts the research, which aims at hoist crane energy management system based on the super capacitor. The paper starting point is that: when the hoist crane system occupies the energy consumption stopping, namely the system occupies the energy back coupling condition, how should we process this part of back coupling energy? In this paper, we proposed one kind of effective addressing plan, and toke the super capacitor as the secondary power sources, at the same time, we collected the back coupling energy to the super capacitor, when the hoist crane system is under the high loading conditions, we delivers this part of energy to the main electrical network, and supply the loading incorporated with the host electrical network, therefore, this kind of plan has already used the back coupling energy effectively, and also solved the question which the back coupling energy may pollute the electrical network, in the other hand, it both has achieved the saving energy, and has achieved the environmental protection, and is also one of creative points about this article.In order to realize the above plan, we have developed a bidirectional dc/dc converter, which power is 3KW, and which is used to solve the connecting between the super capacitor and the frequency converter. In the system, my primary task is that develop the bidirectional dc/dc converter's hardware circuit, including primary device choosing, main circuit modeling, simulation, circuit board design and debugging. The main innovation spot divides into two aspects about this paper: the first is the bidirectional dc/dc converter design, in fallen voltage's process, i have used the phase shifting full bridge PWM control mode with the assistance network, and improved the efficiency;in risen voltage's process, i selected two stage risen methods, the first stage used the high frequency chopping wave to rise voltage, and the frequency is 100KHZ, the secondary stage used the pulse-duration modulation to rise voltage, including high frequency pulse transformer.;the secondary is the software strategy, in the super capacitor charged or discharged process i used digital PI regulator, which both improved the charging or discharging efficiency and workedstably. The concrete plan had all carried on detailed showing in the paper, such as: super capacitor characteristic, bidirectional dc/dc converter design, circuitry simulation.In the paper, the first chapter narrated the super capacitor development and the application, system plan determination background and plan analysis with emphasis, the second, three, and four chapters analyzed with emphasis designed the system the composition, the principle of work and the design process as well as the primary device parameter selection, the fifth chapter is the system simulation analysis and the experiment, the sixth chapter is the system design experience and the methods summary.This system design proposal is novel, the realization method conforms to the social science and technology development in future, after believed, this aspect similar plan can apply to a broader domain soon.