Abstract
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.
Original language | English |
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Title of host publication | 2022 International Conference on Electrical Machines, ICEM 2022 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 1823-1829 |
Number of pages | 7 |
ISBN (Electronic) | 9781665414326 |
DOIs | |
Publication status | Published - 2022 |
Event | 2022 International Conference on Electrical Machines, ICEM 2022 - Valencia, Spain Duration: 2022 Sept 5 → 2022 Sept 8 |
Publication series
Name | 2022 International Conference on Electrical Machines, ICEM 2022 |
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Conference
Conference | 2022 International Conference on Electrical Machines, ICEM 2022 |
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Country/Territory | Spain |
City | Valencia |
Period | 22/9/5 → 22/9/8 |
Bibliographical note
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: [email protected], [email protected], [email protected]).
Publisher Copyright:
© 2022 IEEE.
Keywords
- Fault diagnosis
- common-mode voltage
- ground wall insulation
- insulation capacitance
- insulation resistance
- leakage currents
- rotating machine insulation testing
- variable speed drives
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Mechanical Engineering