TY - GEN
T1 - Position sensor-less resonant frequency estimation method for linear compressor with assist springs
AU - Suzuki, Takahiro
AU - Koyama, Masaki
AU - Nagata, Shuhei
AU - Hatsuse, Wataru
AU - Takemoto, Masatsugu
AU - Ogasawara, Satoshi
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/8/23
Y1 - 2020/8/23
N2 - Higher efficiency for a linear motor should be achievable by adding assist springs and driving the motor at the resonant frequency, even if the efficiency of the motor itself is relatively lower than that of a rotational motor. When using a linear motor with assist springs in a sealed chamber such as a compressor, it is difficult to install a position sensor in such an environment; thus, position sensor-less resonant frequency control is essential. This paper proposes a drive control method that realizes resonant frequency driving without a position sensor. The resonant frequency is estimated on the basis of the detected motor phase current, and the position is estimated using only the fundamental component of the current after removing the offset of the detected current with a high-pass filter. Experimental results show that the proposed method can successfully track the resonant frequency dynamically without a position sensor.
AB - Higher efficiency for a linear motor should be achievable by adding assist springs and driving the motor at the resonant frequency, even if the efficiency of the motor itself is relatively lower than that of a rotational motor. When using a linear motor with assist springs in a sealed chamber such as a compressor, it is difficult to install a position sensor in such an environment; thus, position sensor-less resonant frequency control is essential. This paper proposes a drive control method that realizes resonant frequency driving without a position sensor. The resonant frequency is estimated on the basis of the detected motor phase current, and the position is estimated using only the fundamental component of the current after removing the offset of the detected current with a high-pass filter. Experimental results show that the proposed method can successfully track the resonant frequency dynamically without a position sensor.
KW - Control design
KW - Motion control
KW - Motor drives
KW - Permanent magnet machines
KW - Position control
UR - http://www.scopus.com/inward/record.url?scp=85098641139&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85098641139&partnerID=8YFLogxK
U2 - 10.1109/ICEM49940.2020.9270870
DO - 10.1109/ICEM49940.2020.9270870
M3 - Conference contribution
AN - SCOPUS:85098641139
T3 - Proceedings - 2020 International Conference on Electrical Machines, ICEM 2020
SP - 1206
EP - 1212
BT - Proceedings - 2020 International Conference on Electrical Machines, ICEM 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2020 International Conference on Electrical Machines, ICEM 2020
Y2 - 23 August 2020 through 26 August 2020
ER -