DC power generating system with voltage ripple compensation
AssigneeHamilton Sundstrand Corporation
InventorsGregory I. Rozman, Steven J. Moss
Life of this patent
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Abstract
A method and system for providing voltage ripple compensation in a DC power generation system. The system includes a permanent magnet generator (PMG) and a passive rectifier in operable communication with the PMG. The system also includes a boost converter in operable communication with the passive rectifier and a controller in electrical communication with the boost converter. The controller is configured to cause the boost converter to supply a DC bus and to control the boost converter based on a voltage compensation signal to the boost converter to reduce voltage ripple on the voltage of the DC bus.
Claims18
A system for providing voltage ripple compensation in a DC power generation system, the system comprising:
- a permanent magnet generator (PMG);
- a passive rectifier in operable communication with the PMG;
- a multi-phase interleaved DC-DC boost converter in operable communication with the passive rectifier;
- and
- a controller in electrical communication with the boost converter, wherein the controller is configured to cause the boost converter to supply a DC bus and wherein the controller is configured to control the boost converter based on a desired DC bus voltage and on a voltage compensation signal to the boost converter to reduce voltage ripple on a voltage of the DC bus, wherein the voltage compensation signal is based at least in part on d-q components of harmonics of a DC bus feedback voltage due to 6-pulse passive rectification;
- wherein the controller includes a current regulator in electrical communication with the boost converter, and wherein the current regulator is configured to provide a current regulation scheme to the boost converter based on the desired DC bus voltage, the voltage compensation signal and at least one feedback current of the boost converter,
- wherein the controller further includes a voltage regulator in communication with the current regulator, wherein the voltage regulator is configured to provide a compensated reference current to the current regulator,
- wherein the controller further includes an electrical angle estimator in communication with the PMG and the current regulator, and
- wherein the voltage regulator is in communication with the electrical angle estimator, and wherein the voltage regulator is configured to provide quadrature components of the harmonics of the DC bus feedback voltage at the boost converter to the current regulator, the quadrature components of the feedback voltage output harmonics being based on the estimated electrical angle of the PMG and the feedback voltage.
A method for providing voltage ripple compensation in a DC power generation system having a permanent magnet generator (PMG), the method including:
- operably connecting a passive rectifier to the PMG;
- operably connecting a multi-phase interleaved DC-DC boost converter to the passive rectifier;
- and
- operably connecting a controller in electrical communication with the PMG and boost converter, wherein the controller is configured to execute a process to cause the boost converter to supply a desired DC bus output voltage and wherein the controller is configured to control the boost converter based on the desired DC bus output voltage and a voltage compensation signal to the boost converter to reduce voltage ripple on a voltage of the DC bus, wherein the voltage compensation signal is based at least in part on d-q components of harmonics of a feedback voltage harmonics on the DC bus caused by passive rectification of PMG output;
- further including the controller executing a current regulator function, and wherein the current regulator is configured to provide a current regulation scheme to the boost converter based on the voltage compensation signal and at least one feedback current of the boost converter,
- wherein the controller further includes a voltage regulator function in communication with the current regulator function, wherein the voltage regulator function is configured to provide a compensated reference current to the current regulator,
- wherein the controller further includes an electrical angle estimator function, the electrical angle estimator function configured to estimate at least an angle of power generated at the PMG, and
- wherein the voltage regulator function communicates with the electrical angle estimator function, and the voltage regulator function provides the quadrature components of the harmonics of the feedback voltage at the boost converter to the current regulator, the quadrature components of the harmonics of the feedback voltage being based on the estimated electrical angle of the PMG and the feedback voltage.
Dependencies are inferred from the claim text.