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US 12,119,767 B2Granted
Multilevel power conversion system and method
AssigneeHuawei Digital Power Technologies Co., Ltd.
InventorsHuibin Zhu, Dianbo Fu, Heping Dai, Liming Ye
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Abstract
A system includes a first power conversion device connected to a first power source, a first isolated power conversion device connected to the first power source, and a second power conversion device connected to the first isolated power conversion device, wherein outputs of the first power conversion device and outputs of the second power conversion device are connected in series, and series-connected outputs of the first power conversion device and the second power conversion device are configured to drive a motor.
Claims18
A system comprising:
- a first power conversion device connected to a first power source;
- a first isolated power conversion device connected to the first power source;
- and
- a second power conversion device connected to the first isolated power conversion device, wherein outputs of the first power conversion device and outputs of the second power conversion device are connected in series and configured to drive a motor,
- wherein the first power conversion device is a first inverter comprising a first inverting unit, a second inverting unit and a third inverting unit connected in parallel, and wherein each inverting unit of the first inverter includes two output terminals;
- wherein the second power conversion device comprises a second inverter comprising a fourth inverting unit, a fifth inverting unit and a sixth inverting unit connected in parallel, and wherein each inverting unit of the second inverter includes two output terminals,
- wherein two output terminals of the first inverting unit and two output terminals of the fourth inverting unit of the second inverter are connected in series and further connected to a first phase of the motor,
- wherein two output terminals of the second inverting unit and two output terminals of the fifth inverting unit of the second inverter are connected in series and further connected to a second phase of the motor, and
- wherein two output terminals of the third inverting unit and two output terminals of the sixth inverting unit of the second inverter are connected in series and further connected to a third phase of the motor;
- wherein a common node of the first inverting unit and the fourth inverting unit is configured to be connected to a first phase of a three-phase power source;
- wherein a common node of the second inverting unit and the fifth inverting unit is configured to be connected to a second phase of the three-phase power source;
- and
- wherein a common node of the third inverting unit and the sixth inverting unit is configured to be connected to a third phase of the three-phase power source, and wherein the three-phase power source is configured to charge the first power source through a power factor correction device formed by windings of the motor and switches of the second inverter.
10 more elements
A system comprising:
- a first inverter having inputs connected to a battery;
- an isolated power converter having inputs connected to the battery;
- and
- a second inverter having inputs connected to outputs of the isolated power converter, and outputs connected in series with outputs of the first inverter, wherein series-connected outputs of the first inverter and the second inverter are configured to drive a motor,
- wherein the first inverter comprises a first inverting unit, a second inverting unit, and a third inverting unit connected in parallel, and wherein each inverting unit of the first inverter includes two output terminals;
- wherein the second inverter comprises a fourth inverting unit, a fifth inverting unit, and a sixth inverting unit connected in parallel, and wherein each inverting unit of the second inverter includes two output terminals,
- wherein two output terminals of the first inverting unit and two output terminals of the fourth inverting unit of the second inverter are connected in series and further connected to a first phase of the motor,
- wherein two output terminals of the second inverting unit and two output terminals of the fifth inverting unit of the second inverter are connected in series and further connected to a second phase of the motor, and
- wherein two output terminals of the third inverting unit and two output terminals of the sixth inverting unit of the second inverter are connected in series and further connected to a third phase of the motor;
- wherein a common node of the first inverting unit and the fourth inverting unit is configured to be connected to a first phase of a three-phase power source;
- wherein a common node of the second inverting unit and the fifth inverting unit is configured to be connected to a second phase of the three-phase power source;
- and
- wherein a common node of the third inverting unit and the sixth inverting unit is configured to be connected to a third phase of the three-phase power source, and wherein the three-phase power source is configured to charge the battery through a power factor correction device formed by windings of the motor and switches of the second inverter.
10 more elements
A method comprising:
- driving a motor using a first inverter and a second inverter that are connected in series with one another, the first inverter being connected to a battery, the second inverter being connected to the battery through an isolated power converter;
- and
- charging the battery through a power factor correction device that includes windings of the motor and switches of the second inverter,
- wherein the first inverter comprises a first inverting unit, a second inverting unit, and a third inverting unit connected in parallel, and wherein each inverting unit of the first inverter includes two output terminals;
- wherein the second inverter comprises a fourth inverting unit, a fifth inverting unit, and a sixth inverting unit connected in parallel, and wherein each inverting unit of the second inverter includes two output terminals,
- wherein two output terminals of the first inverting unit and two output terminals of the fourth inverting unit of the second inverter are connected in series and further connected to a first phase of the motor,
- wherein two output terminals of the second inverting unit and two output terminals of the fifth inverting unit of the second inverter are connected in series and further connected to a second phase of the motor, and
- wherein two output terminals of the third inverting unit and two output terminals of the sixth inverting unit of the second inverter are connected in series and further connected to a third phase of the motor;
- wherein a common node of the first inverting unit and the fourth inverting unit is configured to be connected to a first phase of a three-phase power source;
- wherein a common node of the second inverting unit and the fifth inverting unit is configured to be connected to a second phase of the three-phase power source;
- and
- wherein a common node of the third inverting unit and the sixth inverting unit is configured to be connected to a third phase of the three-phase power source, and wherein the three-phase power source is configured to charge the battery through the power factor correction device.
9 more elements
Dependencies are inferred from the claim text.