Power conversion circuit arrangements utilizing resonant alternating current linkage
An apparatus and system for power conversion. In one embodiment, the apparatus comprises a transformer having a primary winding and a plurality of secondary windings; and a cyclo-converter comprising a plurality of switch pairs for converting an alternating current to an AC current, wherein each switch pair in the plurality of switch pairs (i) is coupled between two lines of an AC output and (ii) has a different secondary winding of the plurality of secondary windings coupled between its switches.
1. An apparatus for power conversion, comprising:
a resonant circuit;
a transformer having a primary winding coupled to the resonant circuit and having a plurality of secondary windings; and
a cyclo-converter comprising a plurality of switch pairs for converting an alternating current to an AC current, wherein each switch pair in the plurality of switch pairs (i) is coupled between two lines of an AC output and (ii) has a different secondary winding of the plurality of secondary windings coupled between its switches, wherein the resonant circuit, the transformer, and the cyclo-converter form part of a resonant power converter.
2. The apparatus of claim 1 , wherein the plurality of secondary windings comprises a first secondary winding and a second secondary winding.
3. The apparatus of claim 2 , wherein the first and the second secondary windings are wound in a bifilar configuration.
4. The apparatus of claim 3 , wherein the plurality of switch pairs comprises first and second switch pairs, and wherein the first and the second secondary windings are coupled between drain terminals of the first and the second switch pairs, respectively.
5. The apparatus of claim 4 , wherein the first and the second switch pairs are coupled between a first AC live conductor line and a second AC live conductor line.
6. The apparatus of claim 4 , wherein the first switch pair is coupled between a first AC live conductor line and a neutral line; and the second switch pair is coupled between a second AC live conductor line and the neutral line.
7. The apparatus of claim 1 , further including a bridge coupled to the resonant circuit.
8. The apparatus of claim 7 , wherein the resonant power converter converts a DC input received by the bridge into an AC output.
9. The apparatus of claim 7 , wherein the resonant power converter converts an AC input to a DC output.
10. A system for power conversion, comprising:
a DC source; and
a resonant power converter, coupled to the DC source, for converting a DC current from the DC source to an AC current, wherein the resonant power converter comprises (a) a resonant circuit, (b) a transformer having a primary winding and a plurality of secondary windings, wherein the resonant circuit is coupled between the primary winding and each secondary winding of the plurality of secondary windings; and (c) a cyclo-converter comprising a plurality of switch pairs for converting an alternating current to the AC current, wherein each switch pair in the plurality of switch pairs (i) is coupled between two lines of an AC output and (ii) has a different secondary winding of the plurality of secondary windings coupled between its switches, and wherein the resonant circuit, the transformer, and the cyclo-converter form part of the resonant power converter.
11. The system of claim 10 , wherein the plurality of secondary windings comprises a first secondary winding and a second secondary winding.
12. The system of claim 11 , wherein the first and the second secondary windings are wound in a bifilar configuration.
13. The system of claim 12 , wherein the plurality of switch pairs comprises first and second switch pairs, and wherein the first and the second secondary windings are coupled between drain terminals of the first and the second switch pairs, respectively.
14. The system of claim 13 , wherein the first switch pair is coupled between a first AC live conductor line and a second AC live conductor line or a neutral line; and the second switch pair is coupled between the second AC live conductor line and the first AC live conductor line or the neutral line.
15. The system of claim 10 , wherein the DC source is a renewable energy source.
16. The system of claim 10 , wherein the DC source is a photovoltaic (PV) module.