TY - GEN
T1 - Resonant Frequency Tracking Control for a Linear Compressor with Assist Springs
AU - Suzuki, Takahiro
AU - Koyama, Masaki
AU - Nagata, Syuhei
AU - Hatsuse, Wataru
AU - Takemoto, Masatsugu
AU - Ogasawara, Satoshi
N1 - Publisher Copyright:
© 2020 IEEE.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/10/11
Y1 - 2020/10/11
N2 - This paper proposes a drive control method for a linear compressor driven by a linear motor. Generally, the efficiency of a linear motor itself is relatively lower than that of a rotational motor. However, higher efficiency should be achievable by adding assist springs and driving at the resonant frequency. We have developed a novel resonant frequency estimation method that calculates the phase difference between a supplied voltage and a mover position. Since the phase difference changes according to the drive frequency with respect to the resonant frequency, our method calculates the phase difference by using the arctangent of a Fourier coefficient, which controls the drive frequency to keep the phase difference at 90°. Experimental results show that the proposed method can successfully track to the resonant frequency dynamically even if the mechanical condition is changed.
AB - This paper proposes a drive control method for a linear compressor driven by a linear motor. Generally, the efficiency of a linear motor itself is relatively lower than that of a rotational motor. However, higher efficiency should be achievable by adding assist springs and driving at the resonant frequency. We have developed a novel resonant frequency estimation method that calculates the phase difference between a supplied voltage and a mover position. Since the phase difference changes according to the drive frequency with respect to the resonant frequency, our method calculates the phase difference by using the arctangent of a Fourier coefficient, which controls the drive frequency to keep the phase difference at 90°. Experimental results show that the proposed method can successfully track to the resonant frequency dynamically even if the mechanical condition is changed.
KW - linear compressor
KW - linear motor drive
KW - permananet magnet machines
KW - resonant frequency
UR - http://www.scopus.com/inward/record.url?scp=85097133891&partnerID=8YFLogxK
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U2 - 10.1109/ECCE44975.2020.9236383
DO - 10.1109/ECCE44975.2020.9236383
M3 - Conference contribution
AN - SCOPUS:85097133891
T3 - ECCE 2020 - IEEE Energy Conversion Congress and Exposition
SP - 3016
EP - 3021
BT - ECCE 2020 - IEEE Energy Conversion Congress and Exposition
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020
Y2 - 11 October 2020 through 15 October 2020
ER -