Multiple-input DC-DC converter
First Claim
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1. A DC-DC converter comprising:
- a converter input comprising a first input voltage electrically connected to a first bidirectional switch and a second input voltage electrically connected to a second bidirectional switch, wherein the first bidirectional switch and the second bidirectional switch each comprise a pair of controllable switches in a parallel connection;
an output of the converter input electrically connected with both an inductor and a third bidirectional switch, the third bidirectional switch connected to a ground and the inductor connected to a fourth bidirectional switch and a fifth bidirectional switch, the fourth bidirectional switch connected to the ground and the fifth bidirectional switch connected to a voltage output in connection with a capacitor, wherein the third bidirectional switch comprises a transistor and a diode in parallel, the fourth bidirectional switch comprises a transistor and a diode in parallel and the fifth bidirectional switch comprises a transistor and a diode in parallel;
wherein the first bidirectional switch and the second bidirectional switch can be on to transfer energy simultaneously to the voltage output; and
wherein the voltage output is bucked, boosted or buck-boosted relative to one of the first input voltage or the second input voltage and the voltage output is a same polarity relative to the first input voltage and the second input voltage without use of a transformer; and
wherein the converter operates bidirectionally to provide the output voltage to one of the voltage inputs and the one of the voltage inputs is bucked, boosted or buck-boosted relative to the output voltage and the output voltage is bucked, boosted or buck-boosted by turning on, turning off or switching each of the plurality of bidirectional switches.
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Abstract
A multiple-input DC-DC converter that is capable of power diversification among different energy sources with different voltage-current characteristics. The converter is capable of bidirectional operation in buck, boost and buck-boost modes and provides a positive output voltage without the need for a transformer.
61 Citations
12 Claims
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1. A DC-DC converter comprising:
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a converter input comprising a first input voltage electrically connected to a first bidirectional switch and a second input voltage electrically connected to a second bidirectional switch, wherein the first bidirectional switch and the second bidirectional switch each comprise a pair of controllable switches in a parallel connection; an output of the converter input electrically connected with both an inductor and a third bidirectional switch, the third bidirectional switch connected to a ground and the inductor connected to a fourth bidirectional switch and a fifth bidirectional switch, the fourth bidirectional switch connected to the ground and the fifth bidirectional switch connected to a voltage output in connection with a capacitor, wherein the third bidirectional switch comprises a transistor and a diode in parallel, the fourth bidirectional switch comprises a transistor and a diode in parallel and the fifth bidirectional switch comprises a transistor and a diode in parallel; wherein the first bidirectional switch and the second bidirectional switch can be on to transfer energy simultaneously to the voltage output; and wherein the voltage output is bucked, boosted or buck-boosted relative to one of the first input voltage or the second input voltage and the voltage output is a same polarity relative to the first input voltage and the second input voltage without use of a transformer; and wherein the converter operates bidirectionally to provide the output voltage to one of the voltage inputs and the one of the voltage inputs is bucked, boosted or buck-boosted relative to the output voltage and the output voltage is bucked, boosted or buck-boosted by turning on, turning off or switching each of the plurality of bidirectional switches. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification