A single controller for inductive power transfer systems

Contactless or inductive power transfer (IPT) is preferred for numerous applications, ranging from microwatt bio-engineering devices to high power battery charging systems. Typical IPT systems invariably require a separate controller on both powering and receiving sides of the system to facilitate contactless power transfer in an efficient and controllable way. This paper presents a new IPT control technique, which requires only a single controller located on the powering side to effectively control the amount of ‘contactless’ power delivery to the receiving side. Both theoretical analysis and simulated results are presented to validate the viability of the proposed technique, which is unique in contrast to the existing IPT technology, and low in cost with only one controller.