松耦合感应电源性能的影响因素分析

本文针对串并补偿结构的松耦合感应电源系统,建立了互感模型,分析了输出功率和传输效率达到最大值的条件,得出了系统在谐振频率工作时输出功率和传输效率只与映射阻抗的实部和线圈内阻有关的结论.最后根据实验参数,分析了工作频率、线圈内阻和负载变化对系统性能的影响.

Analysis on factors affecting performance of loosely coupled inductive power transfer system

The application of torque telemetry has been used widely. But the problem of power supply has not been solved perfectly. Inductively coupled power transfer techniques provide a novel way of achieving contact-less power transfer from a static loop coil to a rotation object, which is suitable to be used to supply energy to the torque sensor on the revolving shaft. Because the leakage inductances are large and tend to dominate the power transfer capability, compensation capacitors are used. According to the compensation topology, there are four basic topologies for the inductively coupled power transfer system. The topology of series compensation on the primary and parallel compensation on the secondary was chosen. In this paper, the model of inductive power transfer system was set up, and the prerequisite of the maximum output power and efficiency was figured out. The effect of the system performance due to the variety of operating frequency, winding resistances and load was analyzed at last.