| Inductance-contactless power transmission system(ICPT) is a new technology which can transport power through electromagnetic coupling without any metal contact. Many research institutions and experts express a high degree of attention of it because of its sparkless, contactless, waterproof and air tightness. And the technology has been researched and applied in many different areas in the last two decades, such as the charging of electric toothbrush, portable electronic devices, tablet PC and so on.But, high power ICPT systems are still subjected to some certain constrains. While the system is working without a properly supervision, there will be lots of harmonic interference in the system. For the affects of the distance between cores of the loosely coupled transformer has on the resonant point of the system, this paper will propose theoretical analysis and solutions.The article first carried out a detailed analysis of the resonant converter, studied on the relationship between the reluctance distribution and the inductance of the magnetroesistive. Proposed that the reluctance model can be used to analyze and tuning the inductance of the resonant converter.According to the analysis of the resonant converter, this paper proposed and established a resonant point drift function, described how the distance of cores affects the resonant inductance and frequency by changing the reluctance.For the resonant point will drift when the distance of the cores changes, this paper raised a power maximization resonant frequency tracing algorithm, and introduce the implementation of it. At last, the actual system was used to verify the validity and accuracy of the algorithm. |
PDF Full Text Request