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US 6,310,785 B1Granted
Zero voltage switching DC-DC converter
AssigneeRegents of the University of Minnesota
InventorsRajapandian Ayyanar, Ned Mohan
Life of this patent
Estimating the term…
Abstract
A DC-DC power converter includes input terminals and a rectifier circuit. An additional circuit is connected to the input terminals and the rectifier. The latter circuit is adapted to generate a varying voltage at output terminals of the rectifier that varies in amplitude from a maximum voltage value to a non-zero voltage value between the maximum voltage value and zero.
Claims16
A power converter comprising:
- a first pair of switching elements connected across a first input terminal and a second input terminal forming a first node;
- a second pair of switching elements connected across the first input terminal and the second input terminal forming a second node;
- a first transformer having a primary winding connected across the first and second nodes, and a secondary winding;
- a third pair of electrical elements connected across the first input terminal and the second input terminal forming a third node;
- a second transformer having a primary winding connected across the second and third nodes, and a secondary winding;
- a rectifier connected to the secondary windings of the first and second transformers;
- and
- a filter connected to the rectifier having output terminals.
5 more elements
A power converter comprising:
- a first pair of switching elements connected across a first input terminal and a second input terminal forming a first node;
- a second pair of switching elements connected across the first input terminal and the second input terminal forming a second node;
- a first transformer having a primary winding connected across the first and second nodes, and a secondary winding with a first end connected to the second node;
- a third pair of electrical elements connected across the first input terminal and the second input terminal forming a third node;
- a second transformer having a primary winding with a first end connected to the third node and a second end connected to a second end of the secondary winding of the first transformer, the second transformer having a secondary winding;
- a rectifier connected to the secondary winding of the second transformer;
- and
- a filter connected to the rectifier having output terminals.
5 more elements
A power converter comprising:
- a first pair of switching elements connected across a first input terminal and a second input terminal forming a first node;
- a second pair of switching elements connected across the first input terminal and the second input terminal forming a second node;
- a first transformer having a primary winding connected across the first and second nodes, and a secondary winding;
- a third pair of switching elements connected across the first input terminal and the second input terminal forming a third node;
- a fourth pair of electrical elements connected across the first input terminal and the second input terminal forming a fourth node;
- a second transformer having a primary winding connected across the third and fourth nodes, and a secondary winding;
- a rectifier connected to the secondary windings of the first and second transformers;
- and
- a filter connected to the rectifier having output terminals.
6 more elements
A power converter comprising:
- a full-bridge converter section comprising:
- a first pair of switching elements connected across a first input terminal and a second input terminal forming a first node;
- a second pair of switching elements connected across the first input terminal and the second input terminal forming a second node;
- a third pair of electrical elements connected across the first input terminal and the second input terminal forming a third node, wherein the second pair of switching elements and the third pair of electrical elements form an uncontrolled second bridge converter section having a square wave output;
- a rectifier connected to receive output signals from the full-bridge converter section and the second converter section;
- a filter connected to receive output signals from the rectifier and having output terminals;
- and
- a controller providing control signals to adjust a phase difference between signals at the first and second nodes.
5 more elements
Dependencies are inferred from the claim text.