Summary
Linear compressors with clearance seals are well established for cryocoolers using either a Stirling cycle or pulse tube. However, both piston stroke and piston offset require detection and control in valved compressors. In order to manufacture linear compressor in large scale, then a simple, robust, and cheap control system is required with a minimum of sensors and actuators. This work introduces an approach to sensing the position of the piston using a search coil. The piston stroke is detected by calculating the peak-to-peak flux linkage in relation to the measured drive voltage and current. The piston offset is proportional to an integrated modulus of the back electromotive force (emf) of the search coil. Two PID (proportional-integral-derivative) controllers were developed to control the piston stroke by adjusting the drive voltage and a solenoid valve and bleed flow to control the piston offset. Experimental results validate the proposed compressor control technique.
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Details
- Original title: Piston position sensing and control in a linear compressor using a search coil.
- Record ID : 30017529
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 66
- Publication date: 2016/06
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Indexing
- Themes: Compressors
- Keywords: Linear compressor; Control (automatic); Coil; Piston; Detection
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On-line discharge capacity detection for linear...
- Author(s) : ZOU H., LI C., TANG M., et al.
- Date : 2017/09/06
- Languages : English
- Source: Compressors 2017: 9th International Conference on Compressors and Coolants.
- Formats : PDF
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Sensor-less position detection of oil-free line...
- Author(s) : JIANG H., LIANG K., LI Z.
- Date : 2019/08/24
- Languages : English
- Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Formats : PDF
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Effects of the driving voltage waveform on the ...
- Author(s) : LI C., LI J., TANG L., et al.
- Date : 2019/12
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 108
- Formats : PDF
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Performance investigation of linear compressor ...
- Author(s) : ZOU H. M., SHAO S. Q., TANG M., et al.
- Date : 2012/07/16
- Languages : English
- Source: 2012 Purdue Conferences. 21st International Compressor Engineering Conference at Purdue.
- Formats : PDF
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Influence of piston displacement profiles on th...
- Author(s) : WEI Y., ZUO Z., JIA B., FENG H., LIANG K.
- Date : 2020/09
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 117
- Formats : PDF
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