DC/DC converter
First Claim
1. A DC/DC converter for performing bidirectional power transmission between a first DC power supply and a second DC power supply, the DC/DC converter comprising:
- a transformer;
a first converter section for converting power between DC and AC, the first converter section having a plurality of semiconductor switching devices and connected between the first DC power supply and a first winding of the transformer;
a second converter section for converting power between DC and AC, the second converter section having a plurality of semiconductor switching devices and connected between the second DC power supply and a second winding of the transformer; and
a control circuit for performing drive control of each semiconductor switching device in the first and second converter sections, thereby controlling the first and second converter sections, whereinthe first and second converter sections have capacitors respectively connected in parallel to the semiconductor switching devices, and first and second reactors connected on AC input/output lines, andthe control circuit,upon power transmission from the first DC power supply to the second DC power supply, controls each semiconductor switching device in the first converter section so as to perform zero voltage switching by using the first reactor, and when voltage of the second DC power supply is higher than voltage generated on the second winding of the transformer, controls the second converter section so as to perform a step-up operation by using the second reactor, andupon power transmission from the second DC power supply to the first DC power supply, controls each semiconductor switching device in the second converter section so as to perform zero voltage switching by using the second reactor, and when voltage of the first DC power supply is higher than voltage generated on the first winding of the transformer, controls the first converter section so as to perform a step-up operation by using the first reactor.
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Accused Products
Abstract
In a DC/DC converter for bidirectional power transmission, a first switching circuit is connected between a first winding of a high-frequency transformer and a DC power supply, and a second switching circuit is connected between a second winding and a battery. In the first and second switching circuits, capacitors are connected in parallel to semiconductor switching devices, and first and second reactors are connected on AC input/output lines. Upon power transmission, the switching circuit on the primary side of the high-frequency transformer performs zero voltage switching, and the switching circuit on the secondary side performs a step-up operation by using the reactor.
28 Citations
15 Claims
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1. A DC/DC converter for performing bidirectional power transmission between a first DC power supply and a second DC power supply, the DC/DC converter comprising:
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a transformer; a first converter section for converting power between DC and AC, the first converter section having a plurality of semiconductor switching devices and connected between the first DC power supply and a first winding of the transformer; a second converter section for converting power between DC and AC, the second converter section having a plurality of semiconductor switching devices and connected between the second DC power supply and a second winding of the transformer; and a control circuit for performing drive control of each semiconductor switching device in the first and second converter sections, thereby controlling the first and second converter sections, wherein the first and second converter sections have capacitors respectively connected in parallel to the semiconductor switching devices, and first and second reactors connected on AC input/output lines, and the control circuit, upon power transmission from the first DC power supply to the second DC power supply, controls each semiconductor switching device in the first converter section so as to perform zero voltage switching by using the first reactor, and when voltage of the second DC power supply is higher than voltage generated on the second winding of the transformer, controls the second converter section so as to perform a step-up operation by using the second reactor, and upon power transmission from the second DC power supply to the first DC power supply, controls each semiconductor switching device in the second converter section so as to perform zero voltage switching by using the second reactor, and when voltage of the first DC power supply is higher than voltage generated on the first winding of the transformer, controls the first converter section so as to perform a step-up operation by using the first reactor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification