Multi-level inverter
First Claim
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1. An apparatus comprising:
- first and second direct-current (DC) terminals;
a first circuit comprising a first plurality of switches that includes;
a) a first switch connected between the first DC terminal and a first node,b) a second switch connected between a second node and a third node,c) a third switch connected between the third node and a fourth node, andd) a fourth switch connected between a fifth node and the second DC terminal;
a second circuit comprising a second plurality of switches that includes;
e) a fifth switch connected between the first DC terminal and the fourth node,f) a sixth switch connected between the third node and the fifth node,g) a seventh switch connected between the first node and the third node, andh) an eighth switch connected between the second node and the second DC terminal;
a third circuit connected between the first node and the second node; and
a fourth circuit connected between the fourth node and the fifth node;
wherein;
the first plurality of switches and the second plurality of switches are configured to switch at a first frequency;
the apparatus is configured to output a first sine wave voltage from the third circuit and output a second sine wave voltage from the fourth circuit; and
the first sine wave voltage and the second sine wave voltage are each at the first frequency and 180 degrees phase shifted from each other.
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Abstract
A multi-level inverter having one or more banks, each bank containing a plurality of low voltage MOSFET transistors. A processor configured to switch the plurality of low voltage MOSFET transistors in each bank to switch at multiple times during each cycle.
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Citations
30 Claims
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1. An apparatus comprising:
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first and second direct-current (DC) terminals; a first circuit comprising a first plurality of switches that includes; a) a first switch connected between the first DC terminal and a first node, b) a second switch connected between a second node and a third node, c) a third switch connected between the third node and a fourth node, and d) a fourth switch connected between a fifth node and the second DC terminal; a second circuit comprising a second plurality of switches that includes; e) a fifth switch connected between the first DC terminal and the fourth node, f) a sixth switch connected between the third node and the fifth node, g) a seventh switch connected between the first node and the third node, and h) an eighth switch connected between the second node and the second DC terminal; a third circuit connected between the first node and the second node; and a fourth circuit connected between the fourth node and the fifth node; wherein; the first plurality of switches and the second plurality of switches are configured to switch at a first frequency; the apparatus is configured to output a first sine wave voltage from the third circuit and output a second sine wave voltage from the fourth circuit; and the first sine wave voltage and the second sine wave voltage are each at the first frequency and 180 degrees phase shifted from each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method comprising:
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controlling an apparatus to generate first and second sine wave voltages at a first frequency and 180 degrees phase shifted from each other; wherein the apparatus comprises;
first and second direct-current (DC) terminals, and first, second, third, and fourth circuits,wherein the first circuit comprises a first plurality of switches that includes; a) a first switch connected between the first DC terminal and a first node, b) a second switch connected between a second node and a third node, c) a third switch connected between the third node and a fourth node, and d) a fourth switch connected between a fifth node and the second DC terminal, wherein the second circuit comprises a second plurality of switches that includes; e) a fifth switch connected between the first DC terminal and the fourth node, f) a sixth switch connected between the third node and the fifth node, g) a seventh switch connected between the first node and the third node, and h) an eighth switch connected between the second node and the second DC terminal, wherein the third circuit is connected between the first node and the second node, wherein the fourth circuit is connected between the fourth node and the fifth node, and wherein the controlling of the apparatus comprises; switching, at the first frequency, the first plurality of switches and the second plurality of switches; outputting the first sine wave voltage from the third circuit; and outputting the second sine wave voltage from the fourth circuit. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification