用于IWPT系统的双层交叠线圈抗偏移特性研究

Research on Anti-offset Characteristics of Double-layer Overlapping Coil Used in IWPT System

针对无线电能传输(WPT)线圈发生横向偏移导致效率降低的问题,提出了一种双层交叠线圈结构,该结构可以实现多负载充电,且具有较强的抗偏移性能。首先,建立双层交叠线圈系统电路模型,分析影响系统效率的因素;其次,通过COMSOL软件仿真建立了双层交叠线圈模型,研究了多组充电区域的效率和横向偏移的关系;最后,为验证理论和仿真的真实性,设计了试验装置,结果表明,接收线圈磁通量变化会影响线圈效率,当发生横向偏移时,所提双层交叠线圈结构能维持高且平稳的磁场强度,使系统有效地保持高效率能量传输。

Aiming at the problem of decrease in efficiency caused by lateral offset of the wireless power transfer(WPT)coil,a double-layer overlapping coil structure is proposed,which can realize multi-load charging and has strong anti-offset performance.Firstly,the circuit model of the double-layer overlapping coil system is established to analyze the factors that affect the efficiency of the system,secondly,the double-layer overlapping coil model through COMSOL simulation is established to study the relationship between the efficiency of multiple charging areas and the lateral offset,Finally,in order to verify the authenticity of the theory and simulation,the experimental device is implemented and the experimental results show that the change in the magnetic flux of the receiving coil will affect the coil efficiency.When lateral offset occurs,the proposed double-layer overlapping coil structure can maintain high and stable magnetic field strength enables the system to effectively maintain high-efficiency energy transmission.