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US 10,502,201 B2Granted
Method for operating a linear compressor
AssigneeHaier US Appliance Solutions, Inc.
InventorsSrujan Kusumba, Gregory William Hahn, Michael Lee McIntyre, Joseph W. Latham
Life of this patent
Estimating the term…
Abstract
A method for operating a linear compressor includes providing a dynamic model for a motor of the linear compressor, estimating values for each unknown constant of a plurality of unknown constants of the dynamic model for the motor and repeatedly updating the estimate for each unknown constant of the plurality of unknown constants of the dynamic model for the motor in order to reduce an error between a measured value for the electrical dynamic model and an estimated valve for the electrical dynamic model.
Claims11
A method for estimating parameters of a linear compressor, comprising:
- providing an electrical dynamic model for a motor of the linear compressor, the electrical dynamic model for the motor comprising a plurality of constants and a plurality of variables, the plurality of constants of the electrical dynamic model for the motor comprising a resistance of the motor of the linear compressor, an inductance of the motor of the linear compressor, and a motor force constant, the plurality of constants of the electrical dynamic model for the motor comprising a velocity of the motor of the linear compressor;
- estimating each constant of the plurality of constants of the electrical dynamic model for the motor;
- supplying the motor of the linear compressor with a time varying voltage;
- measuring the velocity of the motor of the linear compressor with a sensor while supplying the motor of the linear compressor with the time varying voltage;
- determining a time varying current through the motor of the linear compressor while supplying the motor of the linear compressor with the time varying voltage;
- calculating an error between the measured velocity of the motor of the linear compressor-at a first time and an estimated velocity of the motor of the linear compressor from the electrical dynamic model at the first time;
- repeatedly updating the estimate for each constant of the plurality of constants of the electrical dynamic model for the motor at each time after the first time in order to reduce the error between the measured velocity of the motor of the linear compressor at each time after the first time and an estimated velocity of the motor of the linear compressor from the electrical dynamic model at each time after the first time;
- saving a final estimate for each constant of the plurality of constants of the electrical dynamic model for the motor in a controller of the linear compressor after said step of repeatedly updating, the controller configured to operate the motor of the linear compressor based at least in part with the final estimate for each constant of the plurality of constants of the electrical dynamic model;
- and
- sealing the motor of the linear compressor within a hermetic shell after said steps of supplying, calculating and repeatedly updating.
7 more elements
A method for estimating parameters of a linear compressor, comprising:
- providing a mechanical dynamic model for the linear compressor, the mechanical dynamic model for the linear compressor comprising a plurality of constants and a plurality of variables, the plurality of constants of the mechanical dynamic model for the linear compressor comprising a moving mass of the linear compressor, a damping coefficient of the linear compressor, and a spring stiffness of the linear compressor, the plurality of constants of the mechanical dynamic model for the motor comprising a velocity of the motor of the linear compressor;
- estimating each constant of the plurality of constants of the mechanical dynamic model for the linear compressor;
- supplying a motor of the linear compressor with a time varying voltage;
- measuring the velocity of the motor of the linear compressor with a sensor while supplying the motor of the linear compressor with the time varying voltage;
- determining a time varying current through the motor of the linear compressor while supplying the motor of the linear compressor with the time varying voltage;
- calculating an error between the measured velocity of the motor of the linear compressor at a first time and an estimated velocity of the motor of the linear compressor from the mechanical dynamic model at the first time;
- and
- repeatedly updating the estimate for each constant of the plurality of constants of the mechanical dynamic model for the linear compressor at each time after the first time in order to reduce the error between the measured velocity of the motor of the linear compressor at each time after the first time and an estimated velocity of the motor of the linear compressor from the mechanical dynamic model at each time after the first time;
- saving a final estimate for each constant of the plurality of constants of the mechanical dynamic model for the linear compressor in a controller of the linear compressor after said step of repeatedly updating, the controller configured to operate the motor of the linear compressor based at least in part with the final estimate for each constant of the plurality of constants of the mechanical dynamic model;
- and
- sealing the motor of the linear compressor within a hermetic shell after said steps of supplying, calculating and repeatedly updating.
8 more elements
Dependencies are inferred from the claim text.