TY - GEN
T1 - Offline Common-Mode Voltage Based Inverter-Embedded Groundwall Insulation Testing for Motors
AU - Shaikh, Muhammad Faizan
AU - Lee, Hyeonjun
AU - Battulga, Byambasuren
AU - Lee, Sang Bin
AU - Stone, Greg C.
N1 - Funding Information:
Φ This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) under Grant NRF-2019R1A2C1084104 M. F. Shaikh, B. Battulga, and S. B. Lee are with the Department of Electrical Engineering, Korea University, Seoul, 02841 Korea (e-mail: faizan.shaikh@eecs.korea.ac.kr, battulga.byambasuren@eecs.korea.ac.kr, sangbinlee@korea.ac.kr).
Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - Recently, inverter-operated electrical machines have increased significantly. According to multiple works, insulation aging occurs faster for inverter-fed machines due to voltage overshoots and uneven voltage distribution caused by high dv/dt switching at several kHz. This necessitates better insulation monitoring methods so deteriorating insulation quality can be detected before machines fail and industrial process is interrupted. Good monitoring methods achieve a balance between detection reliability and cost requirements. Monitoring methods requiring the installation of expensive/intrusive equipment cannot be justified for all machines. Therefore, a new method for monitoring of ground insulation condition for inverter-fed machines is presented here. It utilizes commonly used sensors usually employed for differential protection and is simple in its application. It can be implemented before/after the motor is started/stopped and can screen out severe insulation deterioration preventing machine failure. The method has been verified experimentally on a 380 V, 18.5 kW induction machine.
AB - Recently, inverter-operated electrical machines have increased significantly. According to multiple works, insulation aging occurs faster for inverter-fed machines due to voltage overshoots and uneven voltage distribution caused by high dv/dt switching at several kHz. This necessitates better insulation monitoring methods so deteriorating insulation quality can be detected before machines fail and industrial process is interrupted. Good monitoring methods achieve a balance between detection reliability and cost requirements. Monitoring methods requiring the installation of expensive/intrusive equipment cannot be justified for all machines. Therefore, a new method for monitoring of ground insulation condition for inverter-fed machines is presented here. It utilizes commonly used sensors usually employed for differential protection and is simple in its application. It can be implemented before/after the motor is started/stopped and can screen out severe insulation deterioration preventing machine failure. The method has been verified experimentally on a 380 V, 18.5 kW induction machine.
KW - Fault diagnosis
KW - common-mode voltage
KW - ground wall insulation
KW - insulation capacitance
KW - insulation resistance
KW - leakage currents
KW - rotating machine insulation testing
KW - variable speed drives
UR - http://www.scopus.com/inward/record.url?scp=85141031267&partnerID=8YFLogxK
U2 - 10.1109/ICEM51905.2022.9910839
DO - 10.1109/ICEM51905.2022.9910839
M3 - Conference contribution
AN - SCOPUS:85141031267
T3 - 2022 International Conference on Electrical Machines, ICEM 2022
SP - 1823
EP - 1829
BT - 2022 International Conference on Electrical Machines, ICEM 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 International Conference on Electrical Machines, ICEM 2022
Y2 - 5 September 2022 through 8 September 2022
ER -