Compensation of Current Offset Error in Half-Bridge PWM Inverter for Linear Compressor


Vol. 15, No. 6, pp. 1593-1600, Nov. 2015
10.6113/JPE.2015.15.6.1593


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 Abstract

This paper proposes a novel compensation algorithm of current offset error for single-phase linear compressor in home appliances. In a half-bridge inverter, current offset error may cause unbalanced DC-link voltage when the DC-link is comprised of two serially connected capacitors. To compensate the current measurement error, the synchronous reference frame transformation is used for detecting the measurement error. When an offset error occurs in the output current of the half-bridge inverter, the d-axis current has a ripple with frequency equal to the fundamental frequency. With the use of a proportional-resonant controller, the ripple component can be removed, and offset error can be compensated. The proposed compensation method can easily be implemented without much computation and additional hardware circuit. The validity of the proposed algorithm is verified through experimental results.


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Cite this article

[IEEE Style]

D. Kim, W. Im, S. Hwang, J. Kim, "Compensation of Current Offset Error in Half-Bridge PWM Inverter for Linear Compressor," Journal of Power Electronics, vol. 15, no. 6, pp. 1593-1600, 2015. DOI: 10.6113/JPE.2015.15.6.1593.

[ACM Style]

Dong-Youn Kim, Won-Sang Im, Seon-Hwan Hwang, and Jang-Mok Kim. 2015. Compensation of Current Offset Error in Half-Bridge PWM Inverter for Linear Compressor. Journal of Power Electronics, 15, 6, (2015), 1593-1600. DOI: 10.6113/JPE.2015.15.6.1593.