Research And Design Of Energy Control System On Hybrid Tyre Crane

With the problems of resource shortage and environment degradation become more and more serious, finding the sustainable development which made society, economy, resource and environment can coordinate with each other becomes the international tide. Traditional crane is becoming one of the important researching objects in the energy-saving and environmental-protection field because of its high petrol consumption, low efficiency, severe pollution and wasting of gravitational potential energy. Therefore, producing crane with the characteristics of high efficiency, energy saving and environment protection is an important aim for many companies at home and abroad which apply strategy of sustainable development.At present, research of energy saving of crane mainly includes the following three aspects: improving the performance of generator set, replacing the diesel generator set with commercial power and adopting hybrid power technology. The first method can reduce petrol consumption and save cost through optimizing the control algorithm of the generator set and improving the efficiency of generator set, but the effect of energy saving is limited. Though the second one can save energy via utilize electrical power which have higher performance price ratio than petrol, it has the disadvantages of high cost, complication of local environment because of all kinds of electrical wires in heavy use, lack of agility of the crane when turning the workspace, wasting of gravitational energy of the load, and so on. The third one can use the resource effectively to implement the aim of energy-saving and emission-reduction through the way of decreasing engine capacity, reclaiming potential energy by super-capacitor and driving the crane together with engine. Herein the disadvantage of the first two methods, this paper use the hybrid power technology to improve the performance of generator set, decrease the capacity of engine, reclaim the gravitational energy of load, enhance utilization ratio of the resource, and aims at promoting a optimum control strategy of the whole system.This paper studied the 25T wheel crane, theoretically analyzed the whole hybrid power crane system in detail, established the energy control strategy of the system and designed the energy control system of the hybrid power crane, and made the experiment test to analyzed the energy-saving effect of the system.Firstly, analyzed the characteristics and key technologies of the hybrid power crane's driving components ,it include the principles and features of the diesel generator set, super-capacitor and bidirectional DC/DC converter , which provided the theoretical basis for the reasonable selection and configuration of diesel generator set and super-capacitor.Secondly, studied the energy distribution relationship among generator set, super-capacitor and electromotor, then designed adaptive control strategy of energy distribution, and established the experimental platform for implement of energy-saving and environment protection of the crane.Finally, designed the control software for the energy control system of hybrid power crane and made the experiment test based on the experimental platform. The result verified the correctness of the main circuit of the system and the rationality of the energy control strategy of hybrid power crane, and then analyzed the test data in order to study the energy saving effect of the system. The counting results indicated that the energy efficiency of the system has achieved 40%, so it has huge economic and social benefits.