Coupled inductors are used in power electronics to improve transient response and reduce component size. To further increase inductance density and reduce fringing fields, a combination of different magnetic materials was introduced to create a hetero-magnetic coupled inductor (HMCI) core. To simplify and speedup the prototyping of HMCI designs, in this study a paste-extrusion additive manufacturing platform was used to co-process a custom-developed magnetic and conductive feedstock. First, ferrite plates of each having a winding were co-printed and co-sintered. Then, the HMCI was assembled by bonding together the ferrite + winding plates using a low-temperature curable magnetic paste. The finished HMCI was characterized by measuring its dc winding resistances, leakage inductance, and coupling coefficient. The coupling coefficient of the HMCI was easily adjustable to meet various requirements for high-frequency interleaved multiphase buck converters. This work demonstrates the feasibility of applying an additive manufacturing process for rapid prototyping of an unconventional power magnetic component having an inhomogeneous magnetic core.

中文翻译：

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异磁耦合电感器的增材制造


耦合电感器用于电力电子器件，以改善瞬态响应并减小元件尺寸。为了进一步提高电感密度并减少边缘场，引入了不同磁性材料的组合来创建异磁耦合电感器 (HMCI) 磁芯。为了简化和加速 HMCI 设计的原型设计，在本研究中，使用糊料挤出增材制造平台来协同处理定制开发的磁性和导电原料。首先，共印刷并共烧结各自具有绕组的铁氧体板。然后，通过使用低温固化磁膏将铁氧体 + 绕组板粘合在一起来组装 HMCI。通过测量直流绕组电阻、漏感和耦合系数来对成品 HMCI 进行表征。 HMCI 的耦合系数易于调节，以满足高频交错多相降压转换器的各种要求。这项工作证明了应用增材制造工艺来快速制作具有非均匀磁芯的非常规功率磁性元件原型的可行性。