Flux weakening for a single phase linear compressor
AssigneeHaier US Appliance Solutions, Inc.
InventorsJoseph Wilson Latham, Gregory William Hahn
Life of this patent
Estimating the term…
Abstract
A method for operating a linear compressor of an appliance is provided. The method includes operating a motor of the linear compressor in order to drive a rotor of the motor. The method also include obtaining, via a controller of the linear compressor, a voltage feedback measurement of the motor. Further, the method includes adjusting, via the controller, a control setpoint for the motor based on the voltage feedback measurement and a voltage threshold. In addition, the method includes controlling, via the controller, the motor of the linear compressor based, at least in part, on the adjusted control setpoint so as to implement a flux weakening operation when the voltage feedback measurement is greater than or equal to the voltage threshold.
Claims20
A method for operating a linear compressor of an appliance, the method comprising:
- operating a motor of the linear compressor in order to drive a rotor of the motor;
- obtaining, via a controller of the linear compressor, a voltage feedback measurement of the motor;
- adjusting, via the controller, a control setpoint for the motor based on the voltage feedback measurement and a voltage threshold;
- and
- controlling, via the controller, the motor of the linear compressor based, at least in part, on the adjusted control setpoint so as to implement a flux weakening operation when the voltage feedback measurement is greater than or equal to the voltage threshold.
A linear compressor defining an axial direction and a vertical direction, the linear compressor for an appliance comprising:
- a cylindrical casing defining a compressor chamber;
- a piston positioned within the compressor chamber and being movable along the axial direction;
- a motor operably coupled to the piston;
- and
- a controller configured to perform operations for controlling the motor, the operations comprising:
- operating the motor in order to drive a rotor of the motor;
- obtaining a voltage feedback measurement of the motor;
- adjusting a control setpoint for the motor so as to implement a flux weakening operation based on the voltage feedback measurement and a voltage threshold;
- and
- controlling the motor based, at least in part, on the adjusted control setpoint when the voltage feedback measurement is greater than or equal to the voltage threshold.
An appliance, comprising:
- a cabinet defining an internal chamber;
- a door rotatably mounted to the cabinet to provide selective access to the internal chamber;
- a linear compressor, the linear compressor having a piston movable in a negative axial direction toward a compressor chamber and a positive axial direction away from the compressor chamber;
- a motor operably coupled to the piston;
- an inverter configured to supply a variable frequency waveform to the motor;
- and
- a controller configured to perform operations for controlling the motor, the operations comprising:
- operating the motor in order to drive a rotor of the motor;
- obtaining a voltage feedback measurement of the motor;
- adjusting a control setpoint for the motor so as to implement a flux weakening operation based on the voltage feedback measurement and a voltage threshold;
- and
- controlling the motor based, at least in part, on the adjusted control setpoint when the voltage feedback measurement is greater than or equal to the voltage threshold.
Dependencies are inferred from the claim text.