Power conversion system of multi-phase generator and method of operating the same
AssigneeDelta Electronics, Inc.
InventorsChih-Hung Hsiao, Jo-Fang Wei, Li-Wei Hsiao
Life of this patent
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Abstract
A power conversion system of a multi-phase generator used to provide a power factor correction for a multi-phase generator. The power conversion system of the multi-phase generator includes a multi-phase power conversion unit and a control unit. The multi-phase power conversion unit receives a plurality of generator voltages and a plurality of generator currents generated from the multi-phase generator, and converts the generator voltages into a DC voltage and a DC current. The control unit controls the generator currents to linearly follow the generator voltages, therefore the power factor correction for the multi-phase generator is achieved.
Claims18
A power conversion system of a multi-phase generator, providing a power factor correction for a multi-phase generator, the power conversion system comprising:
- a multi-phase power conversion unit configured to receive a plurality of generator voltages and a plurality of generator currents generated from the multi-phase generator, and convert the generator voltages to output a DC voltage and a DC current;
- and
- a control unit comprising:
- an outer control loop configured to receive the DC voltage and one of the generator voltages, and output at least one current command;
- a discontinuous current limiter configured to receive the at least one current command to limit a maximum value of the at least one current command, and output the at least one current command to be a current limiting command;
- and
- an inner control loop configured to receive the DC current and the current limiting command to control the multi-phase power conversion unit;
- wherein the control unit is configured to control the current limiting command to control the generator currents to linearly follow the generator voltages.
A method of operating a power conversion system of a multi-phase generator, providing a power factor correction for a multi-phase generator, the method comprising steps of:
- (a) providing a multi-phase power conversion unit;
- the multi-phase power conversion unit configured to receive a plurality of generator voltages and a plurality of generator currents generated from the multi-phase generator, and convert the generator voltages to output a DC voltage and a DC current;
- (b) providing a control unit;
- the control unit having an outer control loop, a discontinuous current limiter, and an inner control loop;
- (c) receiving the DC voltage and one of the generator voltages by the outer control loop, and outputting at least one current command;
- receiving the at least one current command by the discontinuous current limiter to limit a maximum value of the at least one current command, and outputting the at least one current command to be a current limiting command;
- receiving the DC current and the current limiting command by the inner control loop to control the multi-phase power conversion unit;
- and
- (d) controlling the current limiting command by the control unit to control the generator currents to linearly follow the generator voltages.
Dependencies are inferred from the claim text.