Airgap Flux Search Coil-Based Estimation of Permanent Magnet Temperature for Thermal Protection of PMSMs

Hyeon Jun Lee; Jigyun Jeong; Marcos Orviz Zapico; Sang Bin Lee; David Diaz Reigosa; Fernando Briz Del Blanco

doi:10.1109/TIA.2023.3320644

Airgap Flux Search Coil-Based Estimation of Permanent Magnet Temperature for Thermal Protection of PMSMs

Hyeon Jun Lee, Jigyun Jeong, Marcos Orviz Zapico, Sang Bin Lee, David Diaz Reigosa, Fernando Briz Del Blanco

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Airgap flux monitoring, commonly used in wound field synchronous generators, has recently received a lot of attention for detecting faults in permanent magnet synchronous motors (PMSM), since a low-cost airgap search coil can provide reliable detection of motor faults. In this article, the feasibility of using the airgap search coil for estimating the temperature of the PM, T_PM, for thermal protection is evaluated for the first time. The model- or signal injection-based methods proposed for T_PM estimation can provide satisfactory estimates of the average T_PM for thermal protection. However, the complexity in the compensation required for non-ideal effects and/or the negative impact of high frequency signal injection can limit their practical use. The new T_PM estimation method based on the airgap search coil voltage measurement proposed in this article does not require compensation for resistance variation or inverter non-linearity, or injection of high-frequency signals. In addition, it can provide detection of rotor faults, and thermal protection based on the T_PM estimate of the hottest PM since individual PMs can be monitored. Experimental results on a 2.2 kW IPMSM verify the claims and show that the existing methods can be simplified with the proposed method.

Original language	English
Pages (from-to)	367-376
Number of pages	10
Journal	IEEE Transactions on Industry Applications
Volume	60
Issue number	1
DOIs	https://doi.org/10.1109/TIA.2023.3320644
Publication status	Published - 2024 Jan 1

Bibliographical note

Publisher Copyright:
© 1972-2012 IEEE.

Keywords

Airgap flux
demagnetization
fault detection
interior permanent magnet synchronous machines
permanent magnet temperature estimation
search coil
thermal protection

ASJC Scopus subject areas

Control and Systems Engineering
Industrial and Manufacturing Engineering
Electrical and Electronic Engineering

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10.1109/TIA.2023.3320644

Cite this

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title = "Airgap Flux Search Coil-Based Estimation of Permanent Magnet Temperature for Thermal Protection of PMSMs",

abstract = "Airgap flux monitoring, commonly used in wound field synchronous generators, has recently received a lot of attention for detecting faults in permanent magnet synchronous motors (PMSM), since a low-cost airgap search coil can provide reliable detection of motor faults. In this article, the feasibility of using the airgap search coil for estimating the temperature of the PM, TPM, for thermal protection is evaluated for the first time. The model- or signal injection-based methods proposed for TPM estimation can provide satisfactory estimates of the average TPM for thermal protection. However, the complexity in the compensation required for non-ideal effects and/or the negative impact of high frequency signal injection can limit their practical use. The new TPM estimation method based on the airgap search coil voltage measurement proposed in this article does not require compensation for resistance variation or inverter non-linearity, or injection of high-frequency signals. In addition, it can provide detection of rotor faults, and thermal protection based on the TPM estimate of the hottest PM since individual PMs can be monitored. Experimental results on a 2.2 kW IPMSM verify the claims and show that the existing methods can be simplified with the proposed method.",

keywords = "Airgap flux, demagnetization, fault detection, interior permanent magnet synchronous machines, permanent magnet temperature estimation, search coil, thermal protection",

author = "Lee, {Hyeon Jun} and Jigyun Jeong and Zapico, {Marcos Orviz} and Lee, {Sang Bin} and Reigosa, {David Diaz} and {Del Blanco}, {Fernando Briz}",

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AU - Reigosa, David Diaz

AU - Del Blanco, Fernando Briz

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N2 - Airgap flux monitoring, commonly used in wound field synchronous generators, has recently received a lot of attention for detecting faults in permanent magnet synchronous motors (PMSM), since a low-cost airgap search coil can provide reliable detection of motor faults. In this article, the feasibility of using the airgap search coil for estimating the temperature of the PM, TPM, for thermal protection is evaluated for the first time. The model- or signal injection-based methods proposed for TPM estimation can provide satisfactory estimates of the average TPM for thermal protection. However, the complexity in the compensation required for non-ideal effects and/or the negative impact of high frequency signal injection can limit their practical use. The new TPM estimation method based on the airgap search coil voltage measurement proposed in this article does not require compensation for resistance variation or inverter non-linearity, or injection of high-frequency signals. In addition, it can provide detection of rotor faults, and thermal protection based on the TPM estimate of the hottest PM since individual PMs can be monitored. Experimental results on a 2.2 kW IPMSM verify the claims and show that the existing methods can be simplified with the proposed method.

AB - Airgap flux monitoring, commonly used in wound field synchronous generators, has recently received a lot of attention for detecting faults in permanent magnet synchronous motors (PMSM), since a low-cost airgap search coil can provide reliable detection of motor faults. In this article, the feasibility of using the airgap search coil for estimating the temperature of the PM, TPM, for thermal protection is evaluated for the first time. The model- or signal injection-based methods proposed for TPM estimation can provide satisfactory estimates of the average TPM for thermal protection. However, the complexity in the compensation required for non-ideal effects and/or the negative impact of high frequency signal injection can limit their practical use. The new TPM estimation method based on the airgap search coil voltage measurement proposed in this article does not require compensation for resistance variation or inverter non-linearity, or injection of high-frequency signals. In addition, it can provide detection of rotor faults, and thermal protection based on the TPM estimate of the hottest PM since individual PMs can be monitored. Experimental results on a 2.2 kW IPMSM verify the claims and show that the existing methods can be simplified with the proposed method.

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Airgap Flux Search Coil-Based Estimation of Permanent Magnet Temperature for Thermal Protection of PMSMs

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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