APPARATUS FOR CONVERTING DIRECT CURRENT TO ALTERNATING CURRENT
First Claim
1. An inverter for converting an input direct current (DC) waveform from a DC source to an output alternating current (AC) waveform for delivery to an AC grid, the inverter comprising:
- an input converter electrically coupled to a power bus and including a transformer, the input converter being configured to convert the input DC waveform to a bus waveform supplied to the power bus;
an output converter electrically coupled to the power bus and configured to convert the bus waveform to the output AC waveform at a grid frequency; and
an active filter electrically coupled to the power bus and configured to reduce a double-frequency ripple power of the bus waveform by supplying power to and absorbing power from the power bus.
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Accused Products
Abstract
An inverter for converting an input direct current (DC) waveform from a DC source to an output alternating current (AC) waveform for delivery to an AC grid includes an input converter, an output converter, and an active filter, each of which is electrically coupled to a bus. The bus may be a DC bus or an AC bus. The input converter is configured to convert the input DC waveform to a DC or AC bus waveform. The output converter is configured to convert the bus waveform to the output AC waveform at a grid frequency. The active filter is configured to reduce a double-frequency ripple power of the bus waveform by supplying power to and absorbing power from the power bus.
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Citations
41 Claims
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1. An inverter for converting an input direct current (DC) waveform from a DC source to an output alternating current (AC) waveform for delivery to an AC grid, the inverter comprising:
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an input converter electrically coupled to a power bus and including a transformer, the input converter being configured to convert the input DC waveform to a bus waveform supplied to the power bus; an output converter electrically coupled to the power bus and configured to convert the bus waveform to the output AC waveform at a grid frequency; and an active filter electrically coupled to the power bus and configured to reduce a double-frequency ripple power of the bus waveform by supplying power to and absorbing power from the power bus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. An apparatus comprising:
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a solar panel comprising a solar cell configured to generate a first direct current (DC) waveform in response to receiving an amount of sunlight; an inverter coupled to the solar cell panel and configured to receive the first DC waveform and convert the first DC waveform to an output alternating current (AC) waveform, the inverter comprising; an input converter electrically coupled the solar cell and a DC bus, the input converter configured to convert the first DC waveform to a second DC waveform supplied to the DC bus; an output converter electrically coupled to the DC bus and configured to convert the second DC waveform to the output AC waveform at a first frequency; and an active filter electrically coupled to the DC bus and configured to reduce a double-frequency ripple power of the second DC waveform by supplying power to and absorbing power from DC power bus. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37)
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38. An inverter comprising:
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a direct current (DC) bus, an input converter electrically coupled to the DC bus, the input converter comprising (i) a transformer having a primary winding and a secondary winding, (ii) a first inverter circuit electrically coupled to the primary winding and configured to convert an input DC waveform to a first alternating current (AC) waveform at the primary winding, the transform being configured to convert the first AC waveform to a second AC waveform, and (iii) a rectifier circuit electrically coupled to the secondary winding and the DC bus, the rectifier circuit being configured to rectify the second AC waveform to produce a second DC waveform on the DC bus; an output converter electrically coupled to the DC bus, the output converter comprising a second inverter circuit electrically coupled to the DC bus and configured to convert the second DC waveform to an output AC waveform suitable for delivery to an AC grid; and an active filter electrically coupled to the DC bus to reduce a double-frequency ripple power of the second DC waveform by supplying power to and absorbing power from DC power bus. - View Dependent Claims (39, 40, 41)
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Specification