Abstract
The recent trend in squirrel cage induction motor manufacturing is to replace fabricated copper rotors with aluminum die-cast rotors to reduce manufacturing cost to stay competitive in the global market. Porosity in aluminum die-cast squirrel cage rotors is inevitably introduced during the die cast process. Porosity can cause degradation in motor performance and can lead to a forced outage causing irreversible damage if it is extreme. Many off-line and on-line quality assurance test methods have been developed and applied for assessment of rotor quality. However, years of experience with the existing test methods revealed that they are not suitable for quality testing or capable of providing a quantitative assessment of rotor condition with sufficient sensitivity. In this paper, a new off-line test method capable of providing sensitive assessment of rotor porosity is proposed. It is shown that rotors with minor and distributed porosity that are difficult to detect with other tests can be screened out during manufacturing. The proposed method is verified through a 3 dimensional finite element analysis and experimental testing on closed and semi-open slot aluminum die cast rotors of 5.5 kW induction motors with porosity.
Original language | English |
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Title of host publication | Proceedings of the 2017 IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2017 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 233-239 |
Number of pages | 7 |
ISBN (Electronic) | 9781509004096 |
DOIs | |
Publication status | Published - 2017 Oct 6 |
Event | 11th IEEE International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2017 - Tinos, Greece Duration: 2017 Aug 29 → 2017 Sept 1 |
Publication series
Name | Proceedings of the 2017 IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2017 |
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Volume | 2017-January |
Conference
Conference | 11th IEEE International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2017 |
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Country/Territory | Greece |
City | Tinos |
Period | 17/8/29 → 17/9/1 |
Bibliographical note
Publisher Copyright:© 2017 IEEE.
Keywords
- Aluminum Die-cast Rotor
- Fault Detection
- Induction Machines
- Porosity
- Quality Assurance
- Squirrel Cage Rotor
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Energy Engineering and Power Technology