Research On Wireless Power Transfer Technology Applied To Rotating Equipment

Since the advent of wireless power transfer technology,it has attracted the attention of scholars both at home and abroad because of its non-contact,safe and reliable characteristics,and it has gained considerable development.Now,wireless power transfer technology has begun to emerge,especially in the application of electric vehicles and digital electronic products.However,wireless power transfer technology has very few applications in rotating equipment.Rotary equipment still using traditional conductive slip ring power supply methods,and there are common problems such as serious wear,poor contact and poor reliability.Based on this problem,this paper studies the application of wireless power supply technology in rotating equipment and aims to design a principle demonstration prototype.Firstly,the overall design of the wireless power supply system for rotating equipment is designed based on the requirements of the subject indicators.Comparing several commonly used resonant topologies,the S-S structure is selected as the system resonant topology.The related theoretical formulas are deduced and the system circuit model is determined.At the same time,system losses are carried out and the establishment of a theoretical model for wireless power supply systems is completed.Then,based on the designed wireless power supply system,the optimization analysis of the system efficiency was completed.Among them,the effects of mutual inductance and load resistance on the system efficiency are studied.At the same time,efficiency optimization and improvement measures are given from the aspect of power loss,and the correctness of the theoretical analysis and system design is preliminarily verified through the circuit simulation.Based on the theoretical analysis and efficiency optimization results,the requirements of the coupling mechanism parameters are clarified.Then combined with the design principles of the coupling mechanism proposed in this paper,a kind of solenoid nested coupling mechanism with skeleton type cores is designed through the simulation model design,core optimization,size optimization and parameter optimization,etc.The parameter stability test of the coupling mechanism completed under rotating condition proves that the coupling mechanism designed is efficient and reliable.At the end of this paper,on the basis of sufficient theoretical analysis and simulation research,the experimental system is built and the prototype is completed.The experimental characteristics are studied in terms of frequency characteristics,load characteristics,power characteristics and stability of the system under rotating conditions,the result proves that the system can realize 3k W power output stably under the rotating condition,the system efficiency is up to 96.8%.