Airgap Search Coil-Based Detection of Damper Bar Failures in Salient Pole Synchronous Motors

J. Yun; S. Park; C. Yang; Sang Bin Lee; J. Antonino-Daviu; M. Sasic; G. C. Stone

doi:10.1109/ECCE.2018.8557640

Airgap Search Coil-Based Detection of Damper Bar Failures in Salient Pole Synchronous Motors

J. Yun, S. Park, C. Yang, Sang Bin Lee, J. Antonino-Daviu, M. Sasic, G. C. Stone

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

Abstract

Damper bars are often used in high output salient pole synchronous motor (SM) rotors for motor starting and stabilization of performance. Several cases of broken damper bars in the rotor of SMs that lead to motor starting failure and/or forced outage have recently been reported. However, detection of damper bar failures is difficult, since the damper bars are active only under the starting or load transients. Damper bar testing in the field currently relies on off-line visual inspection, and there is no means available for detecting failures on-line. In this paper, a new method for detecting damper bar failures based on the analysis of airgap search coil measurements under the starting transient is proposed. Since airgap search coils are being increasingly installed in large SMs for detecting field winding short circuits, the proposed method can be implemented without additional hardware. The effectiveness of the proposed method is verified with 2 dimensional finite element analysis and experimental testing on a custom-built 30 kW salient pole SM under controlled fault conditions. It is shown that the proposed method can provide reliable and sensitive detection of broken damper bars whenever the motor is started at low additional cost.

Original language	English
Title of host publication	2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	5791-5796
Number of pages	6
ISBN (Electronic)	9781479973118
DOIs	https://doi.org/10.1109/ECCE.2018.8557640
Publication status	Published - 2018 Dec 3
Event	10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 - Portland, United States Duration: 2018 Sept 23 → 2018 Sept 27

Other

Other	10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018
Country/Territory	United States
City	Portland
Period	18/9/23 → 18/9/27

Keywords

Airgap Flux
Fault Diagnostics
Salient Pole Synchronous Motor
Search Coil
Spectral Analysis
Starting Transient

ASJC Scopus subject areas

Energy Engineering and Power Technology
Renewable Energy, Sustainability and the Environment
Control and Optimization
Computer Networks and Communications
Hardware and Architecture
Information Systems and Management

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1109/ECCE.2018.8557640

Cite this

Yun, J., Park, S., Yang, C., Lee, S. B., Antonino-Daviu, J., Sasic, M., & Stone, G. C. (2018). Airgap Search Coil-Based Detection of Damper Bar Failures in Salient Pole Synchronous Motors. In 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018 (pp. 5791-5796). Article 8557640 Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2018.8557640

Yun, J, Park, S, Yang, C, Lee, SB, Antonino-Daviu, J, Sasic, M & Stone, GC 2018, Airgap Search Coil-Based Detection of Damper Bar Failures in Salient Pole Synchronous Motors. in 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018., 8557640, Institute of Electrical and Electronics Engineers Inc., pp. 5791-5796, 10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018, Portland, United States, 18/9/23. https://doi.org/10.1109/ECCE.2018.8557640

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abstract = "Damper bars are often used in high output salient pole synchronous motor (SM) rotors for motor starting and stabilization of performance. Several cases of broken damper bars in the rotor of SMs that lead to motor starting failure and/or forced outage have recently been reported. However, detection of damper bar failures is difficult, since the damper bars are active only under the starting or load transients. Damper bar testing in the field currently relies on off-line visual inspection, and there is no means available for detecting failures on-line. In this paper, a new method for detecting damper bar failures based on the analysis of airgap search coil measurements under the starting transient is proposed. Since airgap search coils are being increasingly installed in large SMs for detecting field winding short circuits, the proposed method can be implemented without additional hardware. The effectiveness of the proposed method is verified with 2 dimensional finite element analysis and experimental testing on a custom-built 30 kW salient pole SM under controlled fault conditions. It is shown that the proposed method can provide reliable and sensitive detection of broken damper bars whenever the motor is started at low additional cost.",

keywords = "Airgap Flux, Fault Diagnostics, Salient Pole Synchronous Motor, Search Coil, Spectral Analysis, Starting Transient",

author = "J. Yun and S. Park and C. Yang and Lee, {Sang Bin} and J. Antonino-Daviu and M. Sasic and Stone, {G. C.}",

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AB - Damper bars are often used in high output salient pole synchronous motor (SM) rotors for motor starting and stabilization of performance. Several cases of broken damper bars in the rotor of SMs that lead to motor starting failure and/or forced outage have recently been reported. However, detection of damper bar failures is difficult, since the damper bars are active only under the starting or load transients. Damper bar testing in the field currently relies on off-line visual inspection, and there is no means available for detecting failures on-line. In this paper, a new method for detecting damper bar failures based on the analysis of airgap search coil measurements under the starting transient is proposed. Since airgap search coils are being increasingly installed in large SMs for detecting field winding short circuits, the proposed method can be implemented without additional hardware. The effectiveness of the proposed method is verified with 2 dimensional finite element analysis and experimental testing on a custom-built 30 kW salient pole SM under controlled fault conditions. It is shown that the proposed method can provide reliable and sensitive detection of broken damper bars whenever the motor is started at low additional cost.

KW - Airgap Flux

KW - Fault Diagnostics

KW - Salient Pole Synchronous Motor

KW - Search Coil

KW - Spectral Analysis

KW - Starting Transient

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Airgap Search Coil-Based Detection of Damper Bar Failures in Salient Pole Synchronous Motors

Abstract

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Keywords

ASJC Scopus subject areas

UN SDGs

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