Study On Wireless Power Transfer Technology For Rotating Equipment

Inductively Coupled Power Transfer(ICPT)technology overcomes various shortcomings of traditional wired power supply methods.Through the principle of magnetic induction coupling,non-contact transmission of energy is realized,which is intelligent,convenient,reliable,and low in maintenance cost.Therefore,it has received more and more attention and research,and related technology products have also been successfully applied,showing its broad application prospects.At present,the application of ICPT technology is relatively rare in the case of power supply from rotating equipment.Rotating equipment power supply still uses the traditional contact bus ring power supply method,which has common problems such as easy wear and contact sparks.Based on this problem,this paper studies the related applications of wireless power supply technology in rotating equipment,and aims to design an ICPT system that can be applied to rotating equipment.This paper first analyzes the basic theory of ICPT technology.The basic structure of the ICPT system and the working principle of each link are studied and its role in the ICPT system is described.The mathematical model of the magnetic circuit coupling mechanism is analyzed and the common magnetic circuit mechanism mutual inductance model is derived.Four common compensation topologies and two composite resonant compensation networks,LCL and LCC,are analyzed,and the LCC/S resonant compensation network is selected as the main circuit topology of this paper.In addition,in order to make the output of the system more accurate and increase the controllability of the system output,this paper designs the output control link,analyzes the structural principle of the output control circuit,establishes the circuit mathematical model,and designs the double closed-loop feedback control.Then,the magnetic circuit mechanism of the rotating wireless power supply system is designed.The structural design scheme of the magnetic circuit mechanism and the selection method of the coil and the magnetic core are given.The actual magnetic circuit mechanism is fabricated according to the design scheme.Then,according to the parameters of the designed magnetic circuit mechanism,the working principle of LCC/S type resonance compensation network is analyzed,the system parameter design method is expounded,and the working characteristics of LCC/S type compensation network are deeply studied.In order to build the experimental platform,the full-bridge inverter circuit and its isolation drive circuit,synchronous Buck converter circuit,resonant network circuit and feedback control power isolation detection circuit are designed,and the actual hardware is fabricated according to the designed circuit schematic.In order to verify the correctness and feasibility of the theoretical analysis of this paper,the system simulation model is built according to the circuit structure and parameters designed in the previous paper,which verifies the correctness of theoretical analysis.Finally,in order to verify the correctness of circuit design and simulation analysis,a rotating wireless power supply system experimental platform was built according to the designed hardware circuit.