Since the magnetic field distribution in winding window of thin film micro-inductor with closed magnetic core has obvious 2-D characteristics, the accuracy of 1-D analytical model for its winding AC losses is poor. The magnetic field of the micro-inductor is analyzed deeply to show that its distribution along the winding edge does not change with frequency. According to the analysis result, the magnetic field strength around the winding edge is calculated with the Ampere’s law. And the 2-D magnetic field is decomposed into an x component and y component in rectangular coordinates. Then based on the superposition and uniqueness law of magnetic field, a 2-D analytical winding losses model of thin film micro-inductor is proposed. Finally, the finite element analysis (FEA) simulation verified the loss model to have high accuracy under wide exciting current frequency and the loss model can be used easily.
|Title of host publication||Proceedings of 45th Annual Conference of the IEEE Industrial Electronics Society|
|Number of pages||6|
|Publication status||Accepted/In press - 2020|
|Event||45th Annual Conference of the IEEE Industrial Electronics Society (IECON 2019) - Lisbon Congress Center, Lisbon, Portugal|
Duration: 14 Oct 2019 → 17 Oct 2019
Conference number: 45
|Conference||45th Annual Conference of the IEEE Industrial Electronics Society (IECON 2019)|
|Location||Lisbon Congress Center|
|Period||14/10/2019 → 17/10/2019|
- Thin film
- Winding losses
- Magnetic field
- 2-D analytical winding losses model
Li, Y., Mao, X., Zhu, J., Dong, J., & Zhang, Z. (Accepted/In press). 2-D analytical winding losses model of micro-inductor. In Proceedings of 45th Annual Conference of the IEEE Industrial Electronics Society IEEE.