Research On Temperature Field Of High-power Synchronous Generator For Marine Engineering And Analysis On Influence Of Structural Parameters

Since the 21 st century,the problems of world energy shortage and rapid population growth have become increasingly prominent.Countries in the world are increasingly eager to obtain more energy.With the development of deep-water semi-submersible platforms,it has become an important equipment for offshore resource development.Because of their good environmental adaptability and offshore resource development capabilities,they still have huge application prospects in marine resource exploitation in the future.As the core equipment of the deep-water semi-submersible platform,synchronous generators for offshore engineering are critical to offshore production activities in the face of the harsh working environment.The main research content of this paper is to design a marine synchronous generator suitable for deep-water semi-submersible platforms,and conduct simulation analysis of its electromagnetic performance and temperature field,focusing on the analysis of its temperature field and its influencing parameters.Firstly,determine the structural parameters,protection and insulation level of the motor according to the performance requirements and working environment of the synchronous generator for offshore engineering.Then,the synchronous generator is subjected to path calculation and finite element electromagnetic field simulation analysis,mainly analyzing the loss distribution of the generator.Considering the influence of the fluid field on the temperature field of the marine synchronous generator,ignore the influence of temperature on the material properties of the motor,and perform electromagnetic-thermal unidirectional coupling simulation of the synchronous generator to obtain the temperature rise distribution of the motor.Then consider the temperature for the influence of the material properties of the motor,perform electromagnetic-thermal bidirectional coupling simulation of the synchronous generator to obtain the temperature rise distribution of the motor.The temperature rise result of the magnetic-thermal two-way coupling and the temperature rise result obtained by the magnetic-thermal unidirectional coupling comparative analysis.Finally,on the basis of the two-way coupling of magnetism and heat,the structural parameters affecting the temperature field of the motor are analyzed from the aspects of heat dissipation and heat generation of the motor,and Taguchi method is used to optimize the efficiency of the motor.