| electric transmission technology,has made it possible to reliably and flexibly transmit powerbetween non-contact electromagnetic assembly, using electromagnetic coupling technology,high-frequency technique and power electronics technology. The system's power supply andenergy receiver assembly have no physical connections, so they can be independently installed,sealed and insulated. Nowadays, CEET systems are widely used as underwater facilities, electricvehicles, cranes, workshop transport system, auxiliary devices and artificial organs.CEET systems transmit energy over a large air gap. While most currently used CEETsystems run efficiently in very small air gaps, in many circumstances, from electric vehicles, theauto-sensing charger, the mine applications, to underwater applies, larger gaps exist. Smallcoupling coefficient, low output power and transmission efficiency and poor stability whendisplacement exists, are the main problems of CEET systems.To solve these problems, the following jobs are executed in this thesis: Numerical model ofdetachable transformer was established, according to electromagnetic principle, E-E shapetransformer was designed and optimized; Stability of E-E detachable transformer was studied, assecondary winding position, air-gap and frequency change, and corresponding improvement areapproached; The performance of 8-figure coil and array coil transformer with large air gap wasstudied, including the coupling coefficient and electromagnetic force.Main innovation in this paper is: 8 figure coil and circularly arrayed coils have beenintroduced to the contact-less electrical energy transmission system, and this has greatlyimproved transmission performance of the system.KEY WORDS: contact-less, electrical power transmission, detachable transformer, loosecoupling, primary and secondary compensation, array coil...
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