New Tool Helps in the Selection of Wireless Power Coils

Würth Elektronik, a provider of a wide range of wireless power charging coils, has introduced a tool to help developers select the appropriate wireless power transmitter and receiver coils.

Mix and Match is free tool created by Würth Elektronik. As with REDEXPERT - the world’s most precise AC loss calculator for power chokes - the product specifications accessible for Mix and Match are based on extensive measurements of the electrical response of individual coils in sample applications. As an add-on service, a new Resonant Tank app is now integrated, which represents the resonance circuit and from which the developer can view the circuitry and coupling for the selected coils.

The WE-WPCC (Wireless Power Charging Coil) product group offers a wide range of coils for the most diverse wireless power applications - from consumer electronics and industrial applications through to medical technology. Some combinations of transmitter and receiver coils match perfectly, some only with compromises and then there are combinations which have to be advised against, because the coil areas may be in the wrong ratio, for instance.

A common misconception is that all coils can be combined together arbitrarily according to the Qi standard. This tool makes the developer’s work easier by evaluating all coils and their combinations.

With Mix and Match, every developer would be able to find the right coils for their application, saving them time and effort. They will no longer need to perform their own measurements. They will get measurement curves (on permeability, for example), and details on the thermal behavior of the coils and can try them out in the Resonant Tank app.

The extensive measurement series behind the new Mix and Match tool for the coil combinations used in wireless power transmission are a service with which Würth Elektronik eiSos saves its customers time and costs. The background: Calculations on the basis of specifications cannot predict all aspects of coil response and have to be confirmed in tests. For its own wireless power product portfolio, Würth Elektronik eiSos can relieve its customers of this step. The free online tool Mix and Match has been nominated by the editorial office of Design & Elektronik magazine for the award of “Innovator of the Year 2017” in the field of passive components. Click here to try it out.