TY - JOUR
T1 - Asymmetric Space Vector Modulation for PMSM Sensorless Drives Based on Square-Wave Voltage-Injection Method
AU - Zhang, Hang
AU - Liu, Weiguo
AU - Chen, Zhe
AU - Luo, Guangzhao
AU - Liu, Jianxing
AU - Zhao, Dongdong
N1 - Publisher Copyright:
© 2012 IEEE.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - Square-wave voltage injection is an effective sensorless control method for permanent magnet synchronous motor drives to achieve zero- or low-speed operation. However, it faces great challenge in the case of rail transit application where the switching frequency is less than or equal to 500 Hz, which results in rich low-order harmonics. In order to improve the performance of high-frequency square-wave voltage-injection method over low switching frequency application, an asymmetric space vector modulation (ASVM) method is proposed, and it makes comparisons between carrier and modulation wave in the 1/4 and 3/4 point of each switching cycle. Compared with space vector modulation, ASVM can significantly reduce the low-order sideband and baseband harmonics in the bandpass filter bandwidth. As a result, the position estimation, which is calculated by the filtered current signal, is improved. Moreover, the inverter dead-time effect has been compensated as well. With these improvements, the rotor position can be estimated without using low-pass filters and its dynamic performance can be enhanced. The experimental results proved the effectiveness of the analysis.
AB - Square-wave voltage injection is an effective sensorless control method for permanent magnet synchronous motor drives to achieve zero- or low-speed operation. However, it faces great challenge in the case of rail transit application where the switching frequency is less than or equal to 500 Hz, which results in rich low-order harmonics. In order to improve the performance of high-frequency square-wave voltage-injection method over low switching frequency application, an asymmetric space vector modulation (ASVM) method is proposed, and it makes comparisons between carrier and modulation wave in the 1/4 and 3/4 point of each switching cycle. Compared with space vector modulation, ASVM can significantly reduce the low-order sideband and baseband harmonics in the bandpass filter bandwidth. As a result, the position estimation, which is calculated by the filtered current signal, is improved. Moreover, the inverter dead-time effect has been compensated as well. With these improvements, the rotor position can be estimated without using low-pass filters and its dynamic performance can be enhanced. The experimental results proved the effectiveness of the analysis.
KW - Asymmetric space vector modulation (ASVM)
KW - dead-time effect
KW - low switching frequency
KW - permanent magnet synchronous motor (PMSM)
KW - position estimation error
KW - square-wave voltage injection
UR - http://www.scopus.com/inward/record.url?scp=85034235653&partnerID=8YFLogxK
U2 - 10.1109/TIA.2017.2772166
DO - 10.1109/TIA.2017.2772166
M3 - 文章
AN - SCOPUS:85034235653
SN - 0093-9994
VL - 54
SP - 1425
EP - 1436
JO - IEEE Transactions on Industry Applications
JF - IEEE Transactions on Industry Applications
IS - 2
ER -