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Some applications require an energy transfer without contacts and wires. The mutual inductive effects between two coils allow to transfer energy to an electronic consumer through an air gap. This paper presents an analytical model of a coreless transformer used to design a contactless energy transfer from a platform to a notebook battery charger. By defining the geometric parameters of the transformer,...
The transformer in loosely coupled inductive power transfer system is quite different from traditional closely coupled transformer, and its characteristics are very critical to system performance. In this paper, the factors that influence loosely coupled transformer characteristics are first discussed, including coil position, air gap, and magnetic core position shift. Then their influences are detailed...
This paper presents an LLC series resonant high-frequency sinusoidal power supplier for contactless power transmission system utilizing the magnetizing inductance and the leakage inductance of contactless coupled transformer. The design of system's parameters is under 2mm air gap of contactless coupled transformer and utilizes microchip dsPIC30F4011 to track resonance tank voltage and current phase...
The contactless transmission of electrical power by inductance coupling is a very potential mode of electrical power delivery. The contactless transformer which is the key part of transmission system is modeled based on the estimation of turns and secondary compensation. Comparing with the normal high frequency transformer, the contactless transformer behaves the better effect of electrical power...
This paper presents a combined contactless energy and data transmission system, which is able to detect and to identify a secondary device and which is also able to check its absolute position during the energy transfer. Such an identification is needed in many fields of application under aspects like safety and security. Compared to conventional industrial communication systems like Bluetooth or...
Recently contactless inductive energy transmission for a large air gaps is an appealing area of research for different industrial applications. This paper investigates the influence of geometrical and electrical parameters of energy transmission through a large air gap. The energy transfer is realised by an air transformer. A new method for the determination of air transformer parameters is proposed...
Contact-less electrical energy transmission over a large air gap becomes more and more attractive for different applications. In certain applications, the stability of detachable transformers is of vital concern to maintain the stabilization of the whole system. This paper investigates the influence of horizontal and vertical displacement of primary system as well as transmission frequency on coupling...
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