Design and implementation of a contact-less power charger for robot applications

In this paper, a contact-less power charger for robot applications is studied and developed. Non-contact charging can be achieved by a separable magnetic-transformer design. The transformer primary core is in the charger unit and the secondary core is in the robots. The transformer air-gap is equal to the distance between these two parts. By theoretical analysis, software simulations and circuit implementation, the relationships between the transformer´s coupling coefficient and the core geometry and gap are formulated. In addition, a high-efficiency circuit topology for the studied contact-less charger is fulfilled. It is anticipated that the research results of this paper can contribute to the development of the contact-less charging techniques for robot systems.