Method and apparatus for controlling a scroll compressor using torque progression to reduce vibration
AssigneeGet Inc.
InventorFrank Obrist
Life of this patent
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Abstract
The invention relates to a method used to control a scroll compressor having a first and a second spiral, in particular that are arranged one inside the other. The first spiral can be moved by a motor relative to the second spiral for a decompression or compression operation of the scroll compressor. The invention reduces vibration (actual acceleration forces) in the scroll compressor to allow for a longer service life by adapting a torque curve of the motor on the basis of measured acceleration forces on the scroll compressor which, in turn, is based on the position and/or positional angle of the first spiral relative to the second spiral such that the acceleration forces are reduced below a threshold or minimized.
Claims18
A method for controlling a scroll compressor having first and second spirals arranged one inside the other, wherein the first spiral moves by operation of a motor relative to the second spiral for one of a decompression or compression operation of the scroll compressor, comprising:
- operating the motor to move the first spiral;
- measuring a plurality of acceleration forces on the scroll compressor, wherein the acceleration forces depend on one of a relative position or a positional angle of the first spiral to the second spiral;
- and
- adjusting a torque progression of the motor based on the measured acceleration forces to reduce actual acceleration forces on the motor until a change in a decrease of the acceleration forces reaches a predetermined value, wherein a torque supplied by the motor is shifted as a function of an angle or a phase, or of a positional angle of the second spiral relative to the first spiral.
A controller for a scroll compressor having first and second spirals arranged one inside the other, wherein the first spiral moves by operation of a motor relative to the second spiral, comprising:
- a processor configured to execute instructions for operating the motor, the instructions configured to,
- move the first spiral;
- measure a plurality of acceleration forces on the scroll compressor, wherein the acceleration forces depend on one of a relative position or a positional angle of the first spiral to the second spiral;
- and
- adjust a torque progression of the motor based on the measured acceleration forces to reduce actual acceleration forces on the motor,
- until a change in a decrease of the acceleration forces reaches a predetermined value, wherein a torque supplied by the motor is shifted as a function of an angle or a phase, or of a positional angle of the second spiral relative to the first spiral.
A non-transitory computer readable medium including program instructions for execution on a processor, the program instructions configured to:
- operate a motor to move a first spiral of scroll compressor, wherein the scroll compressor has the first spiral and a second spiral arranged one inside the other, wherein the first spiral moves by operation of the motor relative to the second spiral for one of a decompression or compression operation of the scroll compressor;
- measure a plurality of acceleration forces on the scroll compressor, wherein the acceleration forces depend on one of a relative position or a positional angle of the first spiral to the second spiral;
- and
- adjust a torque progression of the motor based on the measured acceleration forces to reduce actual acceleration forces on the motor, until a change in a decrease of the acceleration forces reaches a predetermined value, wherein a torque supplied by the motor is shifted as a function of an angle or a phase, or of a positional angle of the second spiral relative to the first spiral.
Dependencies are inferred from the claim text.