公开(公告)号：US20250137911A1

公开(公告)日：2025-05-01

申请号：US18925325

申请日：2024-10-24

Applicant: ABB Schweiz AG

Inventor： Grzegorz Piotr Wawrzola ,  Stefan Pypec ,  Matti Laitinen

IPC: G01N17/00 ,  G01N17/04

Abstract: An atmospheric corrosion sensor for detecting corrosion of electrical equipment comprising at least two atmospheric corrosion sensing structures placed on at least one insulated corrosion sensor substrate wherein the corrosion sensing structures are accessible to corrosion atmosphere. The atmospheric corrosion sensing structures have the same spatial dimensions and each of said atmospheric corrosion sensing structures comprises a different composition of corrodible material.

公开(公告)号：US11228234B2

公开(公告)日：2022-01-18

申请号：US16661412

申请日：2019-10-23

Applicant: ABB Schweiz AG

Inventor： Henri Kinnunen ,  Matti Laitinen ,  Jukka-Pekka Kittilä

IPC: H02M1/14 ,  H02M1/34 ,  H05K7/00

Abstract: A power converter arrangement includes a semiconductor switch system with a controllable switch. A capacitor unit includes a capacitor having a capacitance value, the capacitor unit being operatively connected to the semiconductor switch system. A conductor arrangement includes a conductor adapted to conduct an electric current between the capacitor unit and the semiconductor switch system. The conductor has a resistance and an inductance. A resonant circuit is formed by the resistance, the inductance and the capacitance, and the power converter arrangement includes at least one attenuating element for attenuating an electrical ringing in the resonant circuit. The attenuating element is conductively isolated from the resonant circuit. The attenuating element includes ferromagnetic material, and the attenuating element is magnetically coupled to the conductor such that variations in the electric current intensity of the conductor induces eddy currents within the attenuating element.

公开(公告)号：US20250137915A1

公开(公告)日：2025-05-01

申请号：US18924290

申请日：2024-10-23

Applicant: ABB Schweiz AG

Inventor： Grzegorz Piotr Wawrzola ,  Daniel-Bo Wang ,  Matti Laitinen ,  Vesa Tiihonen

IPC: G01N17/04

Abstract: A method of detecting atmospheric corrosion for electrical devices includes monitoring of an electrical state of plurality of metal structures operating as sensing elements embedded in a corrosion sensor. All metal structures have equal dimensions and are made of the same material with the same chemical structure and are placed on non-conductive substrate and located in electrical device. Each metal structure works as single sensing element and its electrical state is monitored. What is more, monitoring of the electrical state of metal structures comprises an assessment of how many of the metal structures have been damaged due to corrosion. The progress of corrosion is assessed by comparison of number of damaged metal structures to threshold values.