Contactless Energy Transmission using a Transformer with Movable Secondary

Abstract

Contactless energy transmission is a very convenient method of energy delivery to loads with variable location in respect of energy source. The most simple and most efficient transfer system is a transformer with an air gap. The paper is focused on analysis of properties of the transformer with relatively large air gap and the secondary winding which is a movable part. The transformer is used to deliver energy to an electronic equipment mounted on the head of drill machine. In order to increase energy efficiency and power density the capacitance compensation system for leakage inductances is applied. Since the secondary is movable, an analysis of generation of the energy resulting from spatial changes of magnetic field is carried out. The analysis presented in the paper is based on ANSYS software and is carried out mostly as harmonic one for linear models.