2024 年 32 巻 1 号 p. 38-44
High-frequency isolation transformers are used to suppress high-frequency leakage currents in insulated parts of medical equipment. In this study, the coil-to-coil capacitance and power transmission efficiency of a high-frequency isolation transformer were analyzed and measured by changing the winding method of the coil on the ferrite core, with and without PTFE, and the material of the core. The results of the electromagnetic simulation showed that the maximum power transmission efficiency was 99.27 % for the N87 equal winding without PTFE and with PTFE, and the minimum coil-to-coil capacitance was 6.9267 pF for the N87 concentrated winding with PTFE. In the actual measurement, the maximum power transmission efficiency was 98.919 % for the N87 equal winding without PTFE, and the minimum coilto-coil capacitance was 4.3924 pF for the N87 concentrated winding with PTFE.
