Würth Elektronik regularly publishes technical articles, white papers, and studies in which we transparently present the results of our research and development work. Our publications provide insight into current projects, methods, and technologies that drive innovation in electronics manufacturing. They are aimed at developers, scientists, and industry partners who are interested in practical research and technical excellence.
With these technical articles, we create a transparent knowledge base – both for our customers and for the scientific community. After all, insights from research flow directly into new products, optimized processes, and sustainable technologies at our company.
This paper describes the development of a Qi-compliant surface-mounted device (SMD) wireless power coil and the implementation and test of the developed coil in a wireless power transfer (WPT) system. To ensure the reliability of the developed coil, different standardized high temperature, moisture and vibration test procedures have been performed. One of the main challenges is to ensure the robustness of the developed coil through the high-temperature reflow soldering process. The main objective was to develop a system for WPT, which enables the usage of the developed SMD coil on the transmitter and receiver side. Finally, the performance of the developed system using the SMD coil is compared to the Würth Elektronik (WE) 200 W design using a comparable through-hole technology (THT) coil with a similar design. The SMD coil design has been filed as a patent.
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