Dual-transformer type of DC-to-DC converter
First Claim
1. A two-transformer type of DC-to-DC converter comprisinga first transformer having a first winding, a second winding and a third winding, and a second transformer having a fourth winding, a fifth winding and a sixth winding, with respective first ends of said first and fourth windings connected to form a first winding pair, respective first ends of said second and fifth windings connected to form a second winding pair, and respective second ends of said fourth and fifth windings connected together,a first DC terminal and second DC terminal for connecting said DC-to-DC converter to a first external circuit, and a third DC terminal and fourth DC terminal for connecting said DC-to-DC converter to a second external circuit,a first AC/DC conversion circuit connected between said first and second DC terminals and said first, second, fourth and fifth windings, for performing conversion between DC electrical power and AC electrical power,a second AC/DC conversion circuit connected between said third and fourth DC terminals and said second and third windings, for performing conversion between DC electrical power and AC electrical power, anda control circuit adapted to control said conversion operations of said first A/D converter and said second AC/DC conversion circuit;
- wherein said first AC/DC conversion circuit comprises;
a first switching element controlled to periodically switch between closed and opened states for respectively connecting and disconnecting said first DC terminal to/from a junction of said second ends of the fourth and fifth windings,a second switching element controlled to periodically switch between said opened and closed states for respectively connecting and disconnecting said second DC terminal to/from said junction,a first capacitor connected between said first DC terminal and a second end of said second winding, anda second capacitor connected between said second DC terminal and a second end of said first winding.
1 Assignment
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Accused Products
Abstract
A first AC/DC converter circuit is coupled via two transformers to a second AC/DC converter circuit, the first AC/DC converter circuit having a symmetrical configuration of two switching elements performing complementary opened/closed switching, to alternately connect positive and negative terminals of a DC source to a junction between transformer primary windings. Each primary winding alternates between a condition of transferring electrical power to a secondary winding and a condition of serving as a choke coil which temporarily stores electromagnetic energy when a current flows through that primary winding and a primary winding of the other transformer.
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Citations
21 Claims
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1. A two-transformer type of DC-to-DC converter comprising
a first transformer having a first winding, a second winding and a third winding, and a second transformer having a fourth winding, a fifth winding and a sixth winding, with respective first ends of said first and fourth windings connected to form a first winding pair, respective first ends of said second and fifth windings connected to form a second winding pair, and respective second ends of said fourth and fifth windings connected together, a first DC terminal and second DC terminal for connecting said DC-to-DC converter to a first external circuit, and a third DC terminal and fourth DC terminal for connecting said DC-to-DC converter to a second external circuit, a first AC/DC conversion circuit connected between said first and second DC terminals and said first, second, fourth and fifth windings, for performing conversion between DC electrical power and AC electrical power, a second AC/DC conversion circuit connected between said third and fourth DC terminals and said second and third windings, for performing conversion between DC electrical power and AC electrical power, and a control circuit adapted to control said conversion operations of said first A/D converter and said second AC/DC conversion circuit; -
wherein said first AC/DC conversion circuit comprises; a first switching element controlled to periodically switch between closed and opened states for respectively connecting and disconnecting said first DC terminal to/from a junction of said second ends of the fourth and fifth windings, a second switching element controlled to periodically switch between said opened and closed states for respectively connecting and disconnecting said second DC terminal to/from said junction, a first capacitor connected between said first DC terminal and a second end of said second winding, and a second capacitor connected between said second DC terminal and a second end of said first winding. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A two-transformer type of DC-to-DC converter comprising a power conversion circuit for converting input DC electrical power from a DC power source into AC electrical power, a rectifier circuit, and a first transformer and a second transformer each comprising two primary windings respectively connected to said power conversion circuit and each comprising a secondary winding connected to said rectifier circuit, with said power conversion circuit comprising a first input supply terminal and a second input supply terminal connected between a positive potential and a negative potential of said DC power source;
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wherein; a first primary winding and second primary winding of said first transformer are connected together at respective first ends thereof, a second end of said first primary winding of the first transformer is connected to a first end of a first primary winding of said second transformer and a second end of said second primary winding of the first transformer is connected to a first end of a second primary winding of said second transformer, and said power conversion circuit comprises a first capacitor connected between said first input supply terminal and a second end of said first primary winding of said second transformer, and a second capacitor connected between said second input supply terminal and a second end of said second primary winding of said second transformer, a first switching element connected between said first input supply terminal and a common connection of said first ends of said primary windings of first transformer, a second switching element connected between said second input supply terminal and said common connection, and a control circuit adapted to control said first switching element and said second switching element for performing complementary opened/closed switching operation. - View Dependent Claims (19, 20, 21)
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Specification