| New contactless power supply system realizes contactless power transmission with high security, reliability, high efficiency and flexibility by the combination of electromagnetic inductive coupling technology, high frequency converter technology, power electronic technology and other advanced technology. This system overcomes many shortcomings brought by the traditional power transmission and new method for power transmission has been opened up.By the theorectical analysis, modeling, simulation, and experiments, a detailed study has been conducted on the coupling of the contactelss transformer, power transmission characteristics and the system compensation mainly with the separate transformer. Based on the results of study, for the first time in our country a demonstration contactless charger has been designed and developed. The characteristic for high power transmission system has been analyzed and calculated. The main contents include:New contactless power supply system model has been established based on the fundamental mode approximation method and mutual inductance model. The stability characteristic with variable frequency control has been analyzed and the stability boundary conditions for various compensation topologies have been given.The coupling for the pot core transformer and air core transformer with frequency, air gap and horizontal displacement have been investigated by the combination of finite element analysis, integral calculation and experimental method. The results show the rectangular coils are more efficient in stabilizing the coupling, and the influence of the coil dimension has been further investigated.The coupling and power transmission characteristic of the contactless power supply system with frequency and load have been studied with the experimental pot...
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