Integrated transformer with low AC losses and impedance balanced interface
AssigneeAstronics Advanced Electronic Systems Corp.
InventorWarren J. Wambsganss
Life of this patent
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Abstract
An integrated transformer device is provided with both inductive and transformer elements. The inductive and transformer elements are combined within the same device, sharing at least a part of the same magnetic and electrical paths. The integrated transformer device comprises a top core, a bottom core, and a shunt core. A high voltage winding is wound around the bottom core. A low voltage winding is wound around the bottom core and the shunt core. Power semiconductor devices, connected in parallel, form a portion of the low voltage winding and are disposed at a location proximate to the high voltage winding.
Claims18
A transformer device comprising:
- a core having a top core, a bottom core, and a shunt core, the top core disposed above and mated to the bottom core, and the bottom core mated to the shunt core;
- a high voltage winding interposed between the top core and the bottom core and between the bottom core and the shunt core, the high voltage winding wrapping around the bottom core;
- a low voltage winding interposed between the top core and the bottom core, the low voltage winding encircling the bottom core, the high voltage winding, and the shunt core;
- a first low voltage winding terminal and a second low voltage winding terminal,
- a circuit board on which the first and second low voltage winding terminals are provided, the first and second low voltage winding terminals connected the low voltage winding to complete a turn of the encircling low voltage winding, the circuit board disposed below the bottom core and proximate to the high voltage winding;
- and
- a plurality of power semiconductor devices mounted on the circuit board and connected to the first and second low voltage winding terminals.
A method of distributing current among a plurality of power semiconductor devices connected to the low voltage winding of a transformer, comprising the steps of:
- providing a transformer device having a magnetic core, a low voltage winding, and a high voltage winding;
- mounting the power semiconductor devices on a circuit board provided with a pair of opposing elongated terminals, the power semiconductor devices arranged in two rows, at approximately equidistant spacing within each row, between the elongated terminals;
- connecting the power semiconductors to the elongated terminals;
- connecting the elongated terminals to the low voltage winding such that the power semiconductors complete a turn of the low voltage winding;
- and
- positioning the semiconductor devices in proximity to the high voltage winding.
Dependencies are inferred from the claim text.