Electrical network configured to magnetically couple to a winding and to control magnetic saturation in a magnetic core
AssigneeEaton Intelligent Power Limited
InventorsJonathan Michael Schaar, Tiefu Zhao
Life of this patent
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Abstract
An apparatus for a load tap changer includes a first primary winding electrically connected to a first contact, the first contact configured to connect to one of a plurality of taps in a load tap changer; a second contact, the second contact configured to connect to one of the plurality of taps in the load tap changer; a magnetic core; and a control circuit including: a secondary winding configured to magnetically couple to the first primary winding and the magnetic core; and an electrical network electrically connected to the secondary winding, the electrical network being configured to prevent magnetic saturation of the magnetic core during switching of the first or second contact.
Claims29
An apparatus for a load tap changer, the apparatus comprising:
- a first primary winding electrically connected to a first contact, the first contact configured to connect to one of a plurality of taps in a load tap changer;
- a second contact, the second contact configured to connect to one of the plurality of taps in the load tap changer;
- a magnetic core;
- and
- a control circuit comprising:
- a secondary winding configured to magnetically couple to the first primary winding and the magnetic core;
- and
- an electrical network electrically connected to the secondary winding, the electrical network being configured to prevent magnetic saturation of the magnetic core during switching of the first or second contact.
An apparatus for controlling voltage output of a transformer, the apparatus comprising:
- a first current path including a first primary winding configured to be electrically connected to one of a plurality of winding taps of a main winding;
- a second current path including a second primary winding configured to be electrically connected to one of a plurality of winding taps of the main winding;
- and
- an electrical network configured to be magnetically coupled to the first primary winding and the second primary winding, the electrical network being configured to control current in the first and the second primary windings via the magnetic coupling.
Dependencies are inferred from the claim text.