Power control system and method
AssigneeRockwell Automation Technologies, Inc.
InventorsRussel J. Kerkman, Carlos D. Rodriguez-Valdez
Life of this patent
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Abstract
A system and method for controlling an electrical device is provided. The method includes receiving three phase power from a source, decomposing signals representative of power in each phase of the three phase power to provide a positive-sequence component of each phase and tracking the positive-sequence component of each phase via a phase locked loop and a tracking filter.
Claims20
A method for controlling an electrical device, comprising:
- receiving three phase power from a source;
- decomposing signals representative of power in each phase of the three phase power to provide a positive-sequence component of each phase;
- and
- tracking the positive-sequence component of each phase via a phase locked loop and a tracking filter.
A method for controlling an electrical device, comprising:
- receiving three phase power from a source;
- applying the three phase power to a tracking filter to generate balanced quadrature signals representative of each phase of power;
- decomposing the quadrature signals to obtain a positive-sequence component of each phase of power;
- applying the positive-sequence components to a phase locked loop to generate signals for each phase representative of rotational frequency or speed;
- and
- applying the signals representative of rotational frequency or speed to the tracking filter to track the positive-sequence components.
A system for controlling an electrical device, comprising:
- tracking filter device configured to determine quadrature signals representative of each phase of three phase power from a source;
- a decomposition circuit configured to decompose the quadrature signals to obtain a positive-sequence component of each phase of power;
- and
- a phase locked loop coupled to receive the positive-sequence components and configured to generate signals for each phase representative of rotational frequency or speed, the signals representative of rotational frequency or speed being applied to the tracking filter to track the positive-sequence components.
A system for controlling an electrical device, comprising:
- non-linear tracking filter device configured to determine quadrature signals representative of each phase of three phase power from a source;
- a decomposition circuit configured to decompose the quadrature signals to obtain a positive-sequence component of each phase of power;
- and
- a first phase locked loop coupled to receive the positive-sequence components and configured to generate signals for each phase representative of phase angle.
Dependencies are inferred from the claim text.