Systems and methods are disclosed for a two-source inverter. The systems and methods combines operation of a first voltage source powering a conventional single source inverter with second voltage source powering a novel switch configuration to power a load. The switch configuration is controlled b
Systems and methods are disclosed for a two-source inverter. The systems and methods combines operation of a first voltage source powering a conventional single source inverter with second voltage source powering a novel switch configuration to power a load. The switch configuration is controlled by a plurality of control signals generated by controller based on a variety of control modes, and feedback signals.
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What is claimed is: 1. A two-source inverter system, the system comprising: a first voltage source; a second voltage source; a first switch set having first DC inputs, first AC outputs, and first control inputs, wherein the first DC inputs are coupled to the first voltage source, and wherein the fi
What is claimed is: 1. A two-source inverter system, the system comprising: a first voltage source; a second voltage source; a first switch set having first DC inputs, first AC outputs, and first control inputs, wherein the first DC inputs are coupled to the first voltage source, and wherein the first AC outputs are configured to be coupled to an AC multi-phase load; a second switch set having second DC inputs, second AC outputs, and second control inputs, wherein the second DC inputs are coupled to the second voltage source, and wherein the second AC outputs are configured to be coupled to the AC multi-phase load; and a controller coupled to the first control inputs and the second control inputs, the controller being configured to receive first feedback signals and second feedback signals from the first switch set and the second switch set respectively, and the controller being configured to control current flow through the first switch set and the second switch set; wherein the second switch set comprises: a first DC node corresponding to one of the second DC inputs; a second DC node corresponding to one of the second DC inputs; a plurality of AC nodes each corresponding to one of the second AC outputs respectively; a plurality of switches each having a switch first end connected to the first DC node and a switch second end connected to one of the plurality of AC nodes respectively; a capacitor having a first end connected to the first DC node and a second end connected the second DC node; a plurality of diodes each connected between the switch second end of one of the plurality of switches and one of the plurality of AC nodes respectively; a first common node connected to each switch first end of the plurality of switches; a second common node connected to the first DC node and the capacitor first end; and a diode connected between, the first common node and the second common node. 2. The system according to claim 1, wherein a first voltage of the first voltage source is higher than or equal to a second voltage of the second voltage source. 3. The system according to claim 1, wherein the first switch set comprises a single source multi-phase inverter. 4. The system according to claim 1, wherein the controller is further configured to control duty cycles of: the first control inputs; and the second control inputs. 5. The system according to claim 1, further comprising a multi-phase load coupled to the first AC outputs and the second AC outputs. 6. The system according to claim 1, wherein the second switch set comprises a plurality of controlled switches connected in parallel between corresponding second DC inputs and second AC outputs, and configured to control current flow between the second DC inputs and the second AC outputs. 7. The system according to claim 1, wherein the second switch set further comprises a plurality of diodes configured to limit the direction of current flow. 8. A two-source inverter system, the system comprising: a first voltage source; a second voltage source; a first switch set having first DC inputs, first AC outputs, and first control inputs, wherein the first DC inputs are coupled to the first voltage source, and wherein the first AC outputs are configured to be coupled to an AC multi-phase load; a second switch set having second DC inputs, second AC outputs, and second control inputs, wherein the second DC inputs are coupled to the second voltage source, and wherein the second AC outputs are configured to be coupled to the AC multi-phase load; and a controller coupled to the first control inputs and the second control inputs, the controller being configured to receive first feedback signals and second feedback signals from the first switch set and the second switch set respectively, and the controller being configured to control current flow through the first switch set and the second switch set; wherein the second switch set comprises: a first DC node corresponding to one of the second DC inputs; a second DC node corresponding to one of the second DC inputs; a first AC node corresponding to one of the second AC outputs; a second AC node corresponding to one of the second AC outputs; a third AC node corresponding to one of the second AC outputs; a first switch having a first switch first end connected to the first DC node and a first switch second end connected to the first AC node; a second switch having a second switch first end connected to the first DC node and a second switch second end connected to the second AC node; a third switch having a third switch first end connected to the first DC node and a third switch second end connected to the third AC node; a capacitor having a first end connected to the first DC node and a second end connected the second DC node; a first diode connected between the first switch second end and the first AC node; a second diode connected between the second switch second end and the second AC node; a third diode connected between the third switch second end and the third AC node; a first common node connected to the first switch first end, the second switch first end, and the third switch first end; a second common node connected to the first DC node and the capacitor first end; and a fourth diode connected between, the first common node and the second common node. 9. A two-source inverter system, the system comprising: a first DC voltage source; a second DC voltage source having a first pole and a second pole; an inverter coupled to the first DC voltage source, and coupled to a first AC output node, a second AC output node, and a third AC output node, the inverter comprising first control inputs; a switch set coupled to the first pole of the second DC voltage source, the switch set comprising: a first diode having its cathode coupled to the first AC output node; a second diode having its cathode coupled to the second AC output node; a third diode having its cathode coupled to the third AC output node; a common switch node; a first switch coupled between the common switch node and the anode of the first diode; a second switch coupled between the common switch node and the anode of the second diode; a third switch coupled between the common switch node and the anode of the third diode; and second control inputs for controlling switching of the first switch, the second switch, and the third switch; and a controller coupled to the first control inputs and the second control inputs, and configured to control current flow through the inverter and the switch set, resulting in a multi-phase AC output established at the first AC output node, the second AC output node, and the third AC output node. 10. The two-source inverter system of claim 9, the switch set further comprising a fourth diode having its cathode coupled to the common switch node, and having its anode coupled to the second pole of the second DC voltage source. 11. The two-source inverter system of claim 9, further comprising a capacitor coupled between the first pole of the second DC voltage source and the second pole of the second DC voltage source.
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Karipides, David Dimitri, Methods and systems for no-break power transfer converter.
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