Improved Performance of a Flat-Wire Coil With Magnetic Composite Material for Wireless Power Transfer
| Autor: | Masashi Ueda, Yusuke Hattori, Yinggang Bu, Tsutomu Mizuno, Mitsuhide Sato |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Power transmission Materials science Magnetic composite 020208 electrical & electronic engineering chemistry.chemical_element 02 engineering and technology 01 natural sciences Temperature measurement Copper Magnetic flux Electronic Optical and Magnetic Materials Improved performance chemistry Electromagnetic coil 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Wireless power transfer Composite material |
| Zdroj: | IEEE Magnetics Letters. 12:1-5 |
| ISSN: | 1949-3088 1949-307X |
| Popis: | This letter focuses on improvements in the performance of flat-wire coils for wireless power transfer in smartphones based on the Qi interface standard. At high frequencies, alternating-current copper losses increase due to the proximity and skin effects. A low-permeability magnetic composite with low hysteresis loss was applied to a coil to reduce coil losses. A parametric analysis was used to obtain the optimum composition of the magnetic coating. Power transmission experiments on a coated coil designed for minimum loss showed that the steady-state temperature was lower than that of an uncoated coil. The coated-coil resistance was lower at high frequencies, where resistance due to skin and proximity effects are significant. When misaligned with respect to a charging pad's transmit coil, the coated coil had a smaller decrease in efficiency compared to an uncoated coil. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|