Determination of TDC Using Digital Correlation Method for Linear Compressor

Abstract:

Moving-magnet linear compressors with sensorless top dead center (TDC) control method are an efficient solution for domestic refrigerators to save energy. TDC can be determined by the inflection point of phase difference between the sinusoidal current and piston displacement (I-X phase difference). A digital correlation method is used to calculate the I-X phase difference to obtain the TDC position for control. The TDC determining system using digital correlation method is manufactured and the error is 2.29% under various discharge pressures.

• Periodical: Advanced Materials Research (Volumes 694-697)
• Pages: 1608-1614
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.694-697.1608
• Online since: May 2013
• Authors: Guo Hong Peng, Ming Sheng Tang, Hui Ming Zou, Chang Qing Tian, Xu Chen
• Keywords: Digital Correlation Method, Linear Compressor, Moving-Magnet, Phase Difference, TDC

References

[1] Cadman, R.V., A Technique for Design of Electro-dynamic Oscillating Compressors. in M.E. Department. Purdue University. (1967).

[2] Walt, N.R.a.U., R. The Simulation and Design of a High Efficiency, Lubricant Free, Linear Compressor for a Domestic Refrigerator, Proc. of the Int. Comp. Eng. Conference. Purdue. (1992).

[3] Unger, R.Z.a.v.d.W., NIcholas R. Linear Compressors for Non-CFC Refrigeration, International Appliance Technical Conference. Purdue University, Indiana. (1996).

[4] Nicholas R. van der Walt, R.U. linear compressors - a maturing technology, International Appliance Technical Conference. (1994).

[5] R Redlich, R.U., Linear compressors: motor configuration, modulation and systems, in Proceeding of the International Compressor engineering conference. (1996).

[6] Lee H.K., S.G.Y., Park J. S., Hong E. P., Development of Linear Compressor for a Household Refrigerator, Pro. Fifteenth International Compressor Engineering Conference.: Purdue, USA. (2000) 31-36.

[7] Huang B. J. , Y.C.C., System Dynamics and Control of a Linear Compressor for Stroke and Frequency Adjustmen,. Transactions of the ASME. (2002).

[8] J.W. Sung, C.W. Lee, G.S. Kim, et al, Sensorless Control for Linear Compressors, International Journal of Applied Electromagnetics and Mechanics. 24 (2006): 273-286.

DOI: 10.3233/jae-2006-811

[9] Heo, K.B., et al., Control of a linear compresso,. Proc. of the Int. Conference on Compressors and their Systems. UK, London. (2003) 493-500.

[10] Wu, J., Research of Digital Measurement for Phase Difference, Journal of Basic Science and Engineering. (2005). (In Chinese)

[11] Wang, Y.-g.Z.P.F.L., Phase Difference Measurement with Digital Correlation Method,. Acta Metrologica Sinica, 21 (2000). (In Chinese)

[12] Haidong Ren, W.Y.F.H., Contrast and Analysis of Three Measuring Methods for Phase Difference Based on LabVIEW, Science Technology and Engineering. 10 (2010). (In Chinese)

[13] B. Hanson, M. Levesley, Self-sensing Applications for Electromagnetic Actuators, Sensors and Actuators A, 116 (2004) 345-351.

DOI: 10.1016/j.sna.2004.05.003

[14] E. Pollak, et al., Mathematical Model of an Electrodynamic Oscillating Refrigeration Compressor, Proceedings of the 1978 International Compressor Engineering Conference, Purdue University, West Lafayette, Indiana, USA, 246-259.

DOI: 10.1016/0140-7007(83)90058-0