Stability analysis of detachable transformer used for contact-less electrical energy transmission system

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 rates. The coupling rate decreases more remarkably when there is a horizontal displacement than there is not. Moreover, the efficiency of systems with a large air gap can be considerably improved by using higher transmission frequencies in the range of approximately 100 kHz. The investigations are carried out by means of flux simulation. The steady-state stability of detachable transformer is improved by studying the coupling rate of transformers with horizontal and vertical displacement by ways of simulation. Influence of operation frequency on output voltage and output power is obtained.