Method and apparatus for resonant power conversion
View Patent ↗A method and apparatus for providing multi-phase power. In one embodiment, the apparatus comprises a cycloconverter controller for determining a charge ratio based on a reference waveform; and a cycloconverter, coupled to the cycloconverter controller and to a multi-phase AC line, for selectively coupling an alternating current to each line of the multi-phase AC line based on the charge ratio.
1. An apparatus for providing multi-phase power, comprising:
a cycloconverter controller for determining a charge ratio based on the phases of a multi-phase AC line; and
a cycloconverter, coupled to the cycloconverter controller and to the multi-phase AC line, for selectively coupling an alternating current to each line of the multi-phase AC line based on the charge ratio, wherein selectively coupling the alternating current comprises partitioning a cycle of the alternating current based on the charge ratio and coupling each partitioned portion of the alternating current to a different phase of the multi-phase AC line.
2. The apparatus of claim 1 , wherein the cycloconverter controller dynamically determines the charge ratio for each time window of a plurality of consecutive time windows.
3. The apparatus of claim 1 , wherein selectively coupling the alternating current comprises partitioning a cycle of the alternating current based on the charge ratio and coupling each partitioned portion of the alternating current to a different phase of the multi-phase AC line.
4. The apparatus of claim 1 , further comprising a resonant circuit, coupled in series with a transformer, for generating the alternating current.
5. The apparatus of claim 4 , wherein the resonant circuit is a series resonant circuit comprising a leakage inductance of the transformer and a capacitor.
6. The apparatus of claim 1 , wherein the charge ratio indicates relative values of each phase of a reference waveform during a time window, wherein the reference waveform represents the multi-phase AC line.
7. The apparatus of claim 6 , wherein the reference waveform is synchronous with an AC voltage on the multi-phase AC line.
8. A method for providing multi-phase power, comprising:
determining a charge ratio based on the phases of a multi-phase AC line; and
selectively coupling, via a cycloconverter, an alternating current to each line of a multi-phase AC line based on the charge ratio, wherein selectively coupling the alternating current comprises partitioning a cycle of the alternating current based on the charge ratio and coupling each partitioned portion of the alternating current to a different phase of the multi-phase AC line.
9. The method of claim 8 , wherein the charge ratio is dynamically determined for each time window of a plurality of consecutive time windows.
10. The method of claim 8 , wherein selectively coupling the alternating current comprises partitioning a cycle of the alternating current based on the charge ratio and coupling each partitioned portion of the alternating current to a different phase of the multi-phase AC line.
11. The method of claim 8 , wherein the charge ratio indicates relative values of each phase of a reference waveform during a time window, wherein the reference waveform represents the multi-phase AC line.
12. The method of claim 11 , further comprising generating the reference waveform synchronous with an AC voltage on the multi-phase AC line.
13. The method of claim 8 , wherein the alternating current is generated by a resonant circuit coupled in series with a transformer.
14. The method of claim 13 , wherein the resonant circuit is a series resonant circuit comprising a leakage inductance of the transformer and a capacitor.
15. A system for providing multi-phase power, comprising:
a photovoltaic (PV) module; and
a resonant converter, coupled to the PV module and to a multi-phase AC line, comprising:
a cycloconverter controller for determining a charge ratio based on the phases of the multi-phase AC line; and
a cycloconverter, coupled to the cycloconverter controller and to the multi-phase AC line, for selectively coupling an alternating current to each line of the multi-phase AC line based on the charge ratio, wherein selectively coupling the alternating current comprises partitioning a cycle of the alternating current based on the charge ratio and coupling each partitioned portion of the alternating current to a different phase of the multi-phase AC line.
16. The system of claim 15 , wherein the resonant converter further comprises a resonant circuit, coupled in series with a transformer, for generating the alternating current.
17. The system of claim 15 , wherein the cycloconverter controller dynamically determines the charge ratio for each time window of a plurality of consecutive time windows.
18. The system of claim 15 , wherein the resonant circuit is a series resonant circuit comprising a leakage inductance of the transformer and a capacitor.
19. The system of claim 15 , wherein the charge ratio indicates relative values of each phase of a reference waveform during a time window, wherein the reference waveform represents the multi-phase AC line.
20. The system of claim 19 , wherein the reference waveform is synchronous with an AC voltage on the multi-phase AC line.