Abstract:
There is presented a transformer arrangement for mitigating transient voltage oscillations. The transformer arrangement comprises a transformer. The transformer comprises a transformer core comprising at least one core leg. A winding is wound around one of the at least one core leg. The winding extends from a first winding terminal to a second winding terminal and comprises a first winding section along a first conductor extending from the first winding terminal to a first intermediate end point, and a second winding section along a second conductor extending from a second intermediate end point to the second winding terminal. The transformer arrangement further comprises an external passive electric component connected between the first intermediate end point and either the second intermediate end point or the second winding terminal arranged to decrease an effective difference between capacitive and inductive voltage distributions between the intermediate end points such that transient voltage oscillations in the winding are mitigated.
Abstract:
There is presented a transformer arrangement for mitigating transient voltage oscillations. The transformer arrangement comprises a transformer. The transformer comprises a transformer core comprising at least one core leg. A winding is wound around one of the at least one core leg. The winding extends from a first winding terminal to a second winding terminal and comprises a first winding section along a first conductor extending from the first winding terminal to a first intermediate end point, and a second winding section along a second conductor extending from a second intermediate end point to the second winding terminal. The transformer arrangement further comprises an external passive electric component connected between the first intermediate end point and either the second intermediate end point or the second winding terminal arranged to decrease an effective difference between capacitive and inductive voltage distributions between the intermediate end points such that transient voltage oscillations in the winding are mitigated.
Abstract:
The present invention relates to magnetic shielding of transformers (100), and particularly to a transformer (100) with at least one magnetic shielding arrangement (101). A transformer (100) with at least one magnetic shielding arrangement (101) is provided, comprising a first magnetic shielding component (102). The first magnetic shielding component (102) is arranged in a first end region (104) of windings (106) of the transformer (100) such that a magnetic stray field and/or stray losses caused by the windings (106) of the transformer (100) during operation of the transformer (100) is reduced. The first magnetic shielding component (102) comprises at least one recess (201, 901, 904, 304) for a better cooling of the transformer (100).
Abstract:
Der Kondensator zeichnet sich im Wesentlichen dadurch aus, dass ein Element aus Metallschaum (9) zur Kontaktierung der Kondensator-Elektroden verwendet wird. Hierzu liegt das Metallschaumelement (9) an einer Kontaktfläche der zu kontaktierenden Elektrode an. Die Kontaktfläche kann bspw. eine flammgespritzte Schicht (8) aufweisen. Das heikle direkte Löten einer Sammelelektrode an die Elektroden entfällt. Gegebenenfalls kann eine Sammelelektrode (10) aber an das Metallschaumelement angelötet werden.
Abstract:
Der erfindungsgemässe Kondensator ist aus mindestens einer Folie (1) bestehend aus einer als Dielektrikum dienenden Trägerfolie (3) mit mindestens einer Leiterschicht (4) gewickelt. Er weist eine interne Serieschaltung auf. Diese wird dadurch bewirkt, dass die auf dem Dielektrikum aufgebrachte Leiterschicht (4) bzw. die Leiterschichten in Sektoren (4.1, 4.2) aufgeteilt ist/sind, die so gegenseitig angeordnet und ggf. miteinander verbunden sind, dass mehrere in Serie geschaltete Elementarkondensatoren gebildet werden. Er zeichnet sich im Wesentlichen dadurch aus, dass auf den Sektoren eine Strompfadstruktur ausgebildet ist, wobei zur Verringerung von durchschlagsbedingten Kapazitätsverlusten die Leiterschicht (4) einen hohen Flächenwiderstand aufweist und zur Reduktion des Flächengesamtwiderstandes die Strompfade (5, 6) der Strompfadstruktur einen deutlich verminderten Flächenwiderstand besitzen.