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US 12,132,406 B2Granted
High and medium voltage power converters with switch modules parallel driving a single transformer primary
AssigneeSolid State Power LLC
InventorsGeorge Mantov, Ken A. Wallace, Plamen Jordanoff
Life of this patent
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Abstract
A multilink power converter with reduced winding voltage is disclosed, as well as various applications. In the disclosed embodiments, multiple primary switch modules have their inputs connected in series while using a single transformer winding connected in parallel to the modules' outputs through voltage blocking capacitors. Medium voltage solid-state transformers are presented, including three-phase power converters. Also presented are embodiments utilizing common mode inductors to equalize the currents of the high voltage modules.
Claims29
A device for converting electrical power comprising:
- a first voltage input;
- a load comprising:
- a first terminal;
- and
- a second terminal;
- and
- a plurality of primary switch modules connected in series across the first voltage input, wherein each primary switch module in the plurality of primary switch modules comprises:
- a first voltage blocking capacitor connected to a first switch output;
- and
- a second voltage blocking capacitor connected to a second switch output,
- wherein the first switch outputs of each primary switch module in the plurality of primary switch modules are connected together with the first terminal and the second switch outputs of each primary switch module in the plurality of primary switch modules are connected together with the second terminal.
8 more elements
A solid-state transformer device for converting three phase input power comprising:
- a first power converter comprising:
- a first input terminal;
- a second input terminal;
- a first output terminal;
- a second output terminal;
- a first plurality of primary switch modules connected in series across the first and second input terminals of the first power converter, wherein each primary switch module in the first plurality of primary switch modules comprises:
- a first switch node;
- and
- a second switch node;
- a first high or medium frequency transformer comprising:
- a primary winding comprising:
- a first terminal;
- and
- a second terminal;
- and
- a secondary winding;
- and
- a secondary switch module connecting the secondary winding of the first high or medium frequency transformer and the first and second output terminals of the first power converter,
- wherein the first switch node of each primary switch module in the first plurality of primary switch modules are connected together via a voltage blocking capacitor with the first terminal of the primary winding of the first high or medium frequency transformer and the second switch node of each primary switch module in the first plurality of primary switch modules are connected together via a voltage blocking capacitor with the second terminal of the primary winding of the first high or medium frequency transformer;
- a second power converter comprising:
- a first input terminal;
- a second input terminal;
- a first output terminal;
- a second output terminal;
- a second plurality of primary switch modules connected in series across the first and second input terminals of the second power converter,
- wherein each primary switch module in the second plurality of primary switch modules comprises:
- a first switch node;
- and
- a second switch node;
- a second high or medium frequency transformer comprising:
- a primary winding comprising:
- a first terminal;
- and
- a second terminal;
- and
- a secondary winding;
- and
- a secondary switch module connecting the secondary winding of the second high or medium frequency transformer and the first and second output terminals of the second power converter,
- wherein the first switch node of each primary switch module in the second plurality of primary switch modules are connected together via a voltage blocking capacitor with the first terminal of the primary winding of the second high or medium frequency transformer and the second switch node of each primary switch module in the second plurality of primary switch modules are connected together via a voltage blocking capacitor with the second terminal of the primary winding of the second high or medium frequency transformer;
- and
- a third power converter comprising:
- a first input terminal;
- a second input terminal;
- a first output terminal;
- a second output terminal;
- a third plurality of primary switch modules connected in series across the first and second input terminals of the third power converter, wherein each primary switch module in the third plurality of primary switch modules comprises:
- a first switch node;
- and
- a second switch node;
- a third high or medium frequency transformer comprising:
- a primary winding comprising:
- a first terminal;
- and
- a second terminal;
- and
- a secondary winding;
- and
- a secondary switch module connecting the secondary winding of the third high or medium frequency transformer and the first and second output terminals of the third power converter,
- wherein the first switch node of each primary switch module in the third plurality of primary switch modules are connected together via a voltage blocking capacitor with the first terminal of the primary winding of the third high or medium frequency transformer and the second switch node of each primary switch module in the third plurality of primary switch modules are connected together via a voltage blocking capacitor with the second terminal of the primary winding of the third high or medium frequency transformer, wherein the first and second input terminals of each of the first, second and third power converters are connected together in a three-phase arrangement and the first and second output terminals of each of the first, second and third power converters are connected together in an output arrangement.
56 more elements
Dependencies are inferred from the claim text.