公开(公告)号：US20130147589A1

公开(公告)日：2013-06-13

申请号：US13709119

申请日：2012-12-10

Applicant: ABB TECHNOLOGY AG

Inventor： Charles W. Johnson ,  Robert C. Ballard ,  David S. Vinson ,  Marek Florkowski ,  Wojciech Piasecki

IPC: H01F27/02 ,  H01F41/00

CPC classification number: H01F27/022 ,  H01F27/34 ,  H01F30/06 ,  H01F41/005 ,  Y10T29/49073

Abstract: A transformer (10) includes a ferromagnetic core (14); winding structure (12) mounted on the core; electrical terminals (40, 40′) connected to the winding structure; a fast transient mitigator circuit (52) including an impedance circuit serially connected between one of the terminals and the winding structure, and a capacitor connected from the one terminal to external ground. The mitigator circuit is constructed and arranged to reduce a frequency spectrum and magnitude of fast transients. An encasement (16), of an insulating resin, commonly encapsulates the core, the winding structure and at least the impedance circuit of the mitigator circuit.

Abstract translation: 变压器（10）包括铁磁芯（14）; 缠绕结构（12）安装在芯上; 连接到绕组结构的电端子（40,40'）; 包括串联连接在一个端子和绕组结构之间的阻抗电路的快速瞬态缓冲电路（52），以及从该一个端子连接到外部接地的电容器。 缓冲器电路被构造和布置以减少快速瞬变的频谱和幅度。 绝缘树脂的封装（16）通常封装芯，绕组结构和至少阻抗电路的阻抗电路。