Efficient performance optimisation of wireless power transmission using genetic algorithm

• Published in: Electronics letters 2014-03, Vol.50 (6), p.462-464
• Main Authors: Han, Junghoon, Kim, Young Dam, Myung, Noh-Hoon
• Format: Article
• Language: English
• Subjects: Applied sciences; Circuit properties; coupled magnetic resonance; efficient performance optimisation; Electric, optical and optoelectronic circuits; Electronics; equivalent circuit parameters; equivalent circuits; Exact sciences and technology; frequency splitting phenomenon; genetic algorithm; genetic algorithms; inductive power transmission; magnetic resonance; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Power electronics, energy conversion and sustainability; wireless power transmission; WPT systems
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2014.0030

Wireless power transfer (WPT) systems using a coupled magnetic resonance have to overcome the frequency splitting phenomenon for a certain distance in order to achieve the best efficiency. In this reported work, a simple and effective method is demonstrated to overcome the frequency splitting for an optimal efficiency, regardless of the distance variation while maintaining the single desired operating frequency. Then, the systems do not need complicated frequency adjustment systems to track the split frequency. For the proposed method, the equivalent circuit parameters of the WPT system are extracted to overcome the frequency splitting by using the genetic algorithm (GA). Then, two adjustable capacitors are added at the source and the load with the optimal values calculated by the GA, again, at the desired operating frequency for the optimal efficiency.